For the reaction system: \[2NO\left( g \right)+{{O}_{2}}\left( g \right)\to 2N{{O}_{2}}\left( g \right)\] volume is suddenly reduced to half its value by increasing the pressure on it. If the reaction is of first order with respect to \[{{O}_{2}}\] and second order with respect to NO, the rate of reaction will

increase to four times of its initial value

diminish to one-eighth of its initial value

increase to eight times of its initial value

increase to four times of its initial value

diminish to one-fourth of its initial value

For the reaction\[{{N}_{2}}{{O}_{5}}(g)\xrightarrow{{}}2N{{O}_{2}}(g)+1/2\,{{O}_{2}}(g)\] the value of rate of disappearance of \[{{N}_{2}}{{O}_{5}}\] is given as \[6.25\times {{10}^{-3}}mol\,{{L}^{-1}}{{s}^{-1}}\]. The rate of formation of \[N{{O}_{2}}\] and \[{{O}_{2}}\] is given respectively as:

\[6.25\times {{10}^{-3}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\] and \[3.125\times {{10}^{-3}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\]

\[6.25\times {{10}^{-3}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\] and \[6.25\times {{10}^{-3}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\]

\[1.25\times {{10}^{-2}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\] and \[3.125\times {{10}^{-3}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\]

\[6.25\times {{10}^{-3}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\] and \[3.125\times {{10}^{-3}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\]

\[1.125\times {{10}^{-2}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\]and \[6.25\times {{10}^{-3}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\]

Assertion: Glow worm shows chemiluminescence. Reason: Glow worm emits light due to oxidation of protein, luciferin present in it. Read the assertion and reason carefully to mark the correct option out of the options given below:

If both assertion and reason are true but reason is not the correct explanation of the assertion.

If both assertion and reason are true and the reason is the correct explanation of the assertion.

If both assertion and reason are true but reason is not the correct explanation of the assertion.

If assertion is true but reason is false.

If the assertion and reason both are false.

Assertion: According to steady state hypothesis, in a multistep reaction, the change in concentration with time for reactive intermediates is zero. Reason: The intermediates are so reactive that after a brief initial period their concentrations rise from zero to a small value and remains constant for most of the duration of the reaction. Read the assertion and reason carefully to mark the correct option out of the options given below:

If both assertion and reason are true but reason is not the correct explanation of the assertion.

If both assertion and reason are true and the reason is the correct explanation of the assertion.

If both assertion and reason are true but reason is not the correct explanation of the assertion.

If assertion is true but reason is false.

If the assertion and reason both are false.

The dipeptide, Gly. Ala has structure -

\[{{H}_{3}}\overset{+}{\mathop{N}}\,\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,NH\underset{{}}{\mathop{\underset{{}}{\mathop{C}}\,}}\,{{H}_{2}}C{{\overset{-}{\mathop{O}}\,}_{2}}\]

\[{{H}_{3}}\overset{+}{\mathop{N}}\,C{{H}_{2}}\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,NH\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,HC{{\bar{O}}_{2}}\]

\[{{H}_{3}}\overset{+}{\mathop{N}}\,\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,NH\underset{{}}{\mathop{\underset{{}}{\mathop{C}}\,}}\,{{H}_{2}}C{{\overset{-}{\mathop{O}}\,}_{2}}\]

\[{{\overset{-}{\mathop{O}}\,}_{2}}C\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,HNH-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\underset{{}}{\mathop{\underset{{}}{\mathop{C}}\,}}\,{{H}_{2}}\overset{+}{\mathop{N}}\,{{H}_{3}}\]

\[{{\overset{-}{\mathop{O}}\,}_{2}}CC{{H}_{2}}NH-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H\overset{+}{\mathop{N}}\,{{H}_{3}}\]

Glucose-D has a great tendency to be converted into cyclic isomer. Which two carbon atoms get joined through 'O' to form this hemiacetal?

\[{{C}_{1}}\] and \[{{C}_{6}}\]

\[{{C}_{1}}\] and \[{{C}_{4}}\]

\[{{C}_{1}}\] and \[{{C}_{6}}\]

\[{{C}_{2}}\] and \[{{C}_{6}}\]

Three separate samples of a solution of a single salt gave these results. One formed a white precipitate with excess ammonia solution, one formed a white precipitate with dil. \[NaCl\] solution and one formed a black precipitate with \[{{H}_{2}}S\]. The salt could be

\[Hg{{\left( N{{O}_{3}} \right)}_{2}}\]

\[Pb{{\left( N{{O}_{3}} \right)}_{2}}\]

\[Hg{{\left( N{{O}_{3}} \right)}_{2}}\]

For detection of sulphur in an organic compound sodium nitroprusside is added to the sodium extract. A violet colour is obtained due to formation of

\[N{{a}_{4}}Fe{{\left( CN \right)}_{6}}\]

\[Fe{{\left( CN \right)}_{2}}\]

\[{{K}_{3}}Fe{{\left( CN \right)}_{5}}NS\]

\[N{{a}_{4}}\left[ Fe{{\left( CN \right)}_{5}}NOS \right]\]

\[N{{a}_{4}}Fe{{\left( CN \right)}_{6}}\]

Above compounds can be differentiated by using the reagent:

Tollen's reagent, \[Cr{{O}_{3}},FeC{{l}_{3}}\]

\[NaOH\], Tollen's reagent, \[FeC{{l}_{3}}\]

\[Cr{{O}_{3}}\] Tollen's reagent, \[FeC{{l}_{3}}\]

Tollen's reagent, \[Cr{{O}_{3}},FeC{{l}_{3}}\]

Na, Tollen's reagent, \[FeC{{l}_{3}}\]

In the above sequence of reaction X and Y are respectively

\[N{{H}_{2}}-N{{H}_{2}}/KOH,HI/P\]

\[KMn{{O}_{4}}\left( aq \right);HI/P\]

\[N{{H}_{2}}-N{{H}_{2}}/KOH,HI/P\]

Which is not true about acetophenone?

It reacts with \[{{I}_{2}}/NaOH\] to form iodoform

It reacts with 2, 4-dinitrophenylhydrazine to form 2,4-dinitrophenylhydrazone

It reacts with Tollen 's reagent to form silver mirror

It reacts with \[{{I}_{2}}/NaOH\] to form iodoform

On oxidation with alkaline \[KMn{{O}_{4}}\] followed by hydrolysis it gives benzoic acid

Clemmensen reduction of a ketone is carried out in the presence of:

\[{{H}_{2}}\] with Pt as catalyst

Ethanol can be prepared more easily by which reaction?(i) \[C{{H}_{3}}C{{H}_{2}}Br+{{H}_{2}}O\xrightarrow{{}}C{{H}_{3}}C{{H}_{2}}OH\](ii) \[C{{H}_{3}}C{{H}_{2}}Br+A{{g}_{2}}O\left( in\text{ }boiling\text{ }water \right)\xrightarrow{{}}\]\[C{{H}_{3}}C{{H}_{2}}OH\]

Both reactions proceed at same rate

In the reaction: \[C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,H-C{{H}_{2}}-O-C{{H}_{2}}-C{{H}_{3}}+HI\xrightarrow{Heated}\]Which of the following compounds will be formed?

\[C{{H}_{3}}-\underset{{}}{\mathop{\underset{{}}{\mathop{\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,H-C{{H}_{2}}-I+C{{H}_{3}}C{{H}_{2}}OH\]

\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{3}}+C{{H}_{3}}C{{H}_{2}}OH\]

\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{2}}OH+C{{H}_{3}}C{{H}_{3}}\]

\[C{{H}_{3}}-\underset{{}}{\mathop{\underset{{}}{\mathop{\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,H-C{{H}_{2}}OH+C{{H}_{3}}-C{{H}_{2}}-I\]

\[C{{H}_{3}}-\underset{{}}{\mathop{\underset{{}}{\mathop{\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,H-C{{H}_{2}}-I+C{{H}_{3}}C{{H}_{2}}OH\]

\[\underset{\left( {{C}_{5}}{{H}_{10}}O \right)}{\mathop{\left( X \right)}}\,~\xrightarrow{{{H}_{3}}{{O}^{+}}}Y+Z\](Y and Z both give the lodoform test). The compound X is -

\[C{{H}_{3}}-CH=CH-O-C{{H}_{2}}-C{{H}_{3}}\]

\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{H}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-O-C{{H}_{2}}-C{{H}_{3}}\]

\[C{{H}_{3}}-\underset{C{{H}_{2}}}{\overset{{}}{\mathop{\underset{||}{\overset{{}}{\mathop{C}}}\,}}}\,-O-C{{H}_{2}}-C{{H}_{3}}\]

Identify Z in the sequence: \[C{{H}_{3}}C{{H}_{2}}CH=C{{H}_{2}}\xrightarrow{HBr/{{H}_{2}}{{O}_{2}}}\] \[Y\xrightarrow{{{C}_{2}}{{H}_{5}}ONa}Z\]

\[C{{H}_{3}}{{\left( C{{H}_{2}} \right)}_{4}}-O-C{{H}_{3}}\]

\[{{(C{{H}_{3}})}_{2}}COHC{{H}_{2}}C{{H}_{3}}\]

\[C{{H}_{3}}C{{H}_{2}}CH\left( C{{H}_{3}} \right)-O-C{{H}_{2}}C{{H}_{3}}\]

\[C{{H}_{3}}{{\left( C{{H}_{2}} \right)}_{3}}-O-C{{H}_{2}}C{{H}_{3}}\]

\[C{{H}_{3}}{{\left( C{{H}_{2}} \right)}_{4}}-O-C{{H}_{3}}\]

Acetic anhydride reacts with diethyl ether in the presence of anhydrous \[AlC{{l}_{3}}\] to give

\[C{{H}_{3}}C{{H}_{2}}COOC{{H}_{3}}\]

\[C{{H}_{3}}COOC{{H}_{2}}C{{H}_{3}}\]

The product of the following reaction,

\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-\underset{{}}{\mathop{\underset{{}}{\mathop{C}}\,}}\,{{H}_{2}}-C{{H}_{2}}OH\]

\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-\underset{OH}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\]

\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-\underset{{}}{\mathop{\underset{{}}{\mathop{C}}\,}}\,{{H}_{2}}-C{{H}_{2}}OH\]

\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{OH}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\]

\[HOC{{H}_{2}}-\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-\underset{{}}{\mathop{\underset{{}}{\mathop{C}}\,}}\,{{H}_{2}}-C{{H}_{3}}\]

tert-Butyl ethyl ether can't be prepared by which reaction?

Sodium tert-butoxide + ethyl bromide \[\to \]

tert- Butanol + ethanol \[\xrightarrow{{{H}^{+}}}\]

tert-Butyl bromide + sodium ethoxide \[\to \]

Sodium tert-butoxide + ethyl bromide \[\to \]

Isobutene + ethanol \[\xrightarrow{{{H}^{+}}}\]

On reaction with sodium, 1 mol of a compound X gives 1 mol of \[{{H}_{2}}\] Which one of the following compounds might be X?

\[C{{H}_{3}}C{{H}_{2}}CH=C{{H}_{2}}\]

\[C{{H}_{3}}COOC{{H}_{2}}C{{H}_{3}}\]

\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\]

\[C{{H}_{2}}(OH)C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}OH\]

1187 + Mcqs in Chemistry in NEET Page 24 McqOptions

1151.	For the reaction system: \[2NO\left( g \right)+{{O}_{2}}\left( g \right)\to 2N{{O}_{2}}\left( g \right)\] volume is suddenly reduced to half its value by increasing the pressure on it. If the reaction is of first order with respect to \[{{O}_{2}}\] and second order with respect to NO, the rate of reaction will
A.	diminish to one-eighth of its initial value
B.	increase to eight times of its initial value
C.	increase to four times of its initial value
D.	diminish to one-fourth of its initial value
Answer» C. increase to four times of its initial value

1152.	The activation energy of the reaction, \[A+B\to C+D+38\] kcal is 20 kcal. What would be the activation energy of the following reaction \[C+D\to A+B\]
A.	20 kcal
B.	-20 kcal
C.	18 kcal
D.	58 kcal
Answer» E.

1153.	For the reaction\[{{N}_{2}}{{O}_{5}}(g)\xrightarrow{{}}2N{{O}_{2}}(g)+1/2\,{{O}_{2}}(g)\] the value of rate of disappearance of \[{{N}_{2}}{{O}_{5}}\] is given as \[6.25\times {{10}^{-3}}mol\,{{L}^{-1}}{{s}^{-1}}\]. The rate of formation of \[N{{O}_{2}}\] and \[{{O}_{2}}\] is given respectively as:
A.	\[6.25\times {{10}^{-3}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\] and \[6.25\times {{10}^{-3}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\]
B.	\[1.25\times {{10}^{-2}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\] and \[3.125\times {{10}^{-3}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\]
C.	\[6.25\times {{10}^{-3}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\] and \[3.125\times {{10}^{-3}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\]
D.	\[1.125\times {{10}^{-2}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\]and \[6.25\times {{10}^{-3}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\]
Answer» C. \[6.25\times {{10}^{-3}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\] and \[3.125\times {{10}^{-3}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\]

1154.	Assertion: Glow worm shows chemiluminescence. Reason: Glow worm emits light due to oxidation of protein, luciferin present in it. Read the assertion and reason carefully to mark the correct option out of the options given below:
A.	If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.	If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.	If assertion is true but reason is false.
D.	If the assertion and reason both are false.
Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

1155.	Assertion: According to steady state hypothesis, in a multistep reaction, the change in concentration with time for reactive intermediates is zero. Reason: The intermediates are so reactive that after a brief initial period their concentrations rise from zero to a small value and remains constant for most of the duration of the reaction. Read the assertion and reason carefully to mark the correct option out of the options given below:
A.	If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.	If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.	If assertion is true but reason is false.
D.	If the assertion and reason both are false.
Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion.

1156.	Vitamin D is also known as
A.	sunshine vitamin
B.	ascorbic acid
C.	growth vitamin
D.	reproductive vitamin
Answer» B. ascorbic acid

1157.	The dipeptide, Gly. Ala has structure -
A.	\[{{H}_{3}}\overset{+}{\mathop{N}}\,C{{H}_{2}}\overset{O}{\mathop{\overset{\|\|}{\mathop{C}}\,}}\,NH\underset{C{{H}_{3}}}{\mathop{\underset{\|}{\mathop{C}}\,}}\,HC{{\bar{O}}_{2}}\]
B.	\[{{H}_{3}}\overset{+}{\mathop{N}}\,\underset{C{{H}_{3}}}{\mathop{\underset{\|}{\mathop{C}}\,}}\,H\overset{O}{\mathop{\overset{\|\|}{\mathop{C}}\,}}\,NH\underset{{}}{\mathop{\underset{{}}{\mathop{C}}\,}}\,{{H}_{2}}C{{\overset{-}{\mathop{O}}\,}_{2}}\]
C.	\[{{\overset{-}{\mathop{O}}\,}_{2}}C\underset{C{{H}_{3}}}{\mathop{\underset{\|}{\mathop{C}}\,}}\,HNH-\overset{O}{\mathop{\overset{\|\|}{\mathop{C}}\,}}\,-\underset{{}}{\mathop{\underset{{}}{\mathop{C}}\,}}\,{{H}_{2}}\overset{+}{\mathop{N}}\,{{H}_{3}}\]
D.	\[{{\overset{-}{\mathop{O}}\,}_{2}}CC{{H}_{2}}NH-\overset{O}{\mathop{\overset{\|\|}{\mathop{C}}\,}}\,\underset{C{{H}_{3}}}{\mathop{\underset{\|}{\mathop{C}}\,}}\,H\overset{+}{\mathop{N}}\,{{H}_{3}}\]
Answer» B. \[{{H}_{3}}\overset{+}{\mathop{N}}\,\underset{C{{H}_{3}}}{\mathop{\underset{\|}{\mathop{C}}\,}}\,H\overset{O}{\mathop{\overset{\|\|}{\mathop{C}}\,}}\,NH\underset{{}}{\mathop{\underset{{}}{\mathop{C}}\,}}\,{{H}_{2}}C{{\overset{-}{\mathop{O}}\,}_{2}}\]

1158.	Which of the following is a steroid hormone?
A.	Cholesterol
B.	Adrenaline
C.	Thyroxine
D.	Progesterone
Answer» E.

1159.	Glucose-D has a great tendency to be converted into cyclic isomer. Which two carbon atoms get joined through 'O' to form this hemiacetal?
A.	\[{{C}_{1}}\] and \[{{C}_{4}}\]
B.	\[{{C}_{1}}\]and \[{{C}_{5}}\]
C.	\[{{C}_{1}}\] and \[{{C}_{6}}\]
D.	\[{{C}_{2}}\] and \[{{C}_{6}}\]
Answer» C. \[{{C}_{1}}\] and \[{{C}_{6}}\]

1160.	If one strand of DNA has the sequence ATGCTTGA, the sequence in the complimentary strand would be
A.	TACGAACT
B.	TCCGAACT
C.	TACGTACT
D.	TACGTAGT
Answer» B. TCCGAACT

1161.	A vitamin that contains both N and P is
A.	Vitamin C
B.	Vitamin K
C.	Vitamin \[{{B}_{12}}\]
D.	Vitamin D
Answer» D. Vitamin D

1162.	In Kjeldahl's method, \[CuS{{O}_{4}}\] acts as
A.	oxidising agent
B.	reducing agent
C.	hydrolysing agent
D.	catalytic agent
Answer» E.

1163.	0.75 g platinic chloride of a mono- acidic base on ignition gives 0.245 g platinum. The molecular weight of the base is
A.	75
B.	93.5
C.	100
D.	80
Answer» C. 100

1164.	Aniline is usually purified by
A.	chromatographic technique
B.	steam distillation
C.	by addition of oxalic acid
D.	fractional crystallization
Answer» C. by addition of oxalic acid

1167.	The formula of gas is \[{{[CO]}_{x}}\]. If its vapour density is 140, the value of x will be:
A.	2.5
B.	3
C.	5
D.	6
Answer» D. 6

1165.	Three separate samples of a solution of a single salt gave these results. One formed a white precipitate with excess ammonia solution, one formed a white precipitate with dil. \[NaCl\] solution and one formed a black precipitate with \[{{H}_{2}}S\]. The salt could be
A.	\[AgN{{O}_{3}}\]
B.	\[Pb{{\left( N{{O}_{3}} \right)}_{2}}\]
C.	\[Hg{{\left( N{{O}_{3}} \right)}_{2}}\]
D.	\[MnS{{O}_{4}}\]
Answer» C. \[Hg{{\left( N{{O}_{3}} \right)}_{2}}\]

1166.	For detection of sulphur in an organic compound sodium nitroprusside is added to the sodium extract. A violet colour is obtained due to formation of
A.	\[Fe{{\left( CN \right)}_{2}}\]
B.	\[{{K}_{3}}Fe{{\left( CN \right)}_{5}}NS\]
C.	\[N{{a}_{4}}\left[ Fe{{\left( CN \right)}_{5}}NOS \right]\]
D.	\[N{{a}_{4}}Fe{{\left( CN \right)}_{6}}\]
Answer» D. \[N{{a}_{4}}Fe{{\left( CN \right)}_{6}}\]

1168.	3.92 g of ferrous ammonium sulphate react N completely with \[50ml\frac{N}{10}KMn{{O}_{4}}\] solution. The percentage purity of the sample is
A.	50
B.	78.4
C.	80
D.	39.2
Answer» B. 78.4

1169.	Above compounds can be differentiated by using the reagent:
A.	\[NaOH\], Tollen's reagent, \[FeC{{l}_{3}}\]
B.	\[Cr{{O}_{3}}\] Tollen's reagent, \[FeC{{l}_{3}}\]
C.	Tollen's reagent, \[Cr{{O}_{3}},FeC{{l}_{3}}\]
D.	Na, Tollen's reagent, \[FeC{{l}_{3}}\]
Answer» C. Tollen's reagent, \[Cr{{O}_{3}},FeC{{l}_{3}}\]

1170.	In the above sequence of reaction X and Y are respectively
A.	\[{{H}_{2}}/Pt;B{{r}_{2}}\]
B.	\[KMn{{O}_{4}};{{H}_{2}}/Pt\]
C.	\[KMn{{O}_{4}}\left( aq \right);HI/P\]
D.	\[N{{H}_{2}}-N{{H}_{2}}/KOH,HI/P\]
Answer» D. \[N{{H}_{2}}-N{{H}_{2}}/KOH,HI/P\]

1171.	What is the missing reagent in the synthesis shown below
A.	bromocyclopentane
B.	1,5- dibromo pentane
C.	1,4-dibromo butane
D.	1, 1- dibromo cyclopentane
Answer» D. 1, 1- dibromo cyclopentane

1172.	Acetic acid on heating in presence of \[{{P}_{2}}{{O}_{5}}\] gives
A.	acetic anhydride
B.	acetylene
C.	peracid
D.	no reaction
Answer» B. acetylene

1173.	Which of the following compounds will react with \[NaHC{{O}_{3}}\] solution to give sodium salt and carbon dioxide?
A.	Acetic acid
B.	n-Hexanol
C.	Phenol
D.	Both [b] and [c]
Answer» B. n-Hexanol

1174.	Which is not true about acetophenone?
A.	It reacts with 2, 4-dinitrophenylhydrazine to form 2,4-dinitrophenylhydrazone
B.	It reacts with Tollen 's reagent to form silver mirror
C.	It reacts with \[{{I}_{2}}/NaOH\] to form iodoform
D.	On oxidation with alkaline \[KMn{{O}_{4}}\] followed by hydrolysis it gives benzoic acid
Answer» C. It reacts with \[{{I}_{2}}/NaOH\] to form iodoform

1175.	Which of the following will respond to Cannizzaro's reaction?
A.	2,2-Dimethylpropanal
B.	Acetaldehyde
C.	Propionaldehyde
D.	Cinnamaldehyde
Answer» B. Acetaldehyde

Explore topic-wise MCQs in NEET.

The activation energy of the reaction, \[A+B\to C+D+38\] kcal is 20 kcal. What would be the activation energy of the following reaction \[C+D\to A+B\]

For the reaction\[{{N}_{2}}{{O}_{5}}(g)\xrightarrow{{}}2N{{O}_{2}}(g)+1/2\,{{O}_{2}}(g)\] the value of rate of disappearance of \[{{N}_{2}}{{O}_{5}}\] is given as \[6.25\times {{10}^{-3}}mol\,{{L}^{-1}}{{s}^{-1}}\]. The rate of formation of \[N{{O}_{2}}\] and \[{{O}_{2}}\] is given respectively as:

Assertion: Glow worm shows chemiluminescence. Reason: Glow worm emits light due to oxidation of protein, luciferin present in it. Read the assertion and reason carefully to mark the correct option out of the options given below:

Vitamin D is also known as

The dipeptide, Gly. Ala has structure -

Which of the following is a steroid hormone?

Glucose-D has a great tendency to be converted into cyclic isomer. Which two carbon atoms get joined through 'O' to form this hemiacetal?

If one strand of DNA has the sequence ATGCTTGA, the sequence in the complimentary strand would be

A vitamin that contains both N and P is

In Kjeldahl's method, \[CuS{{O}_{4}}\] acts as

0.75 g platinic chloride of a mono- acidic base on ignition gives 0.245 g platinum. The molecular weight of the base is

Aniline is usually purified by

Three separate samples of a solution of a single salt gave these results. One formed a white precipitate with excess ammonia solution, one formed a white precipitate with dil. \[NaCl\] solution and one formed a black precipitate with \[{{H}_{2}}S\]. The salt could be

For detection of sulphur in an organic compound sodium nitroprusside is added to the sodium extract. A violet colour is obtained due to formation of

The formula of gas is \[{{[CO]}_{x}}\]. If its vapour density is 140, the value of x will be:

3.92 g of ferrous ammonium sulphate react N completely with \[50ml\frac{N}{10}KMn{{O}_{4}}\] solution. The percentage purity of the sample is

Above compounds can be differentiated by using the reagent:

In the above sequence of reaction X and Y are respectively

What is the missing reagent in the synthesis shown below

Acetic acid on heating in presence of \[{{P}_{2}}{{O}_{5}}\] gives

Which of the following compounds will react with \[NaHC{{O}_{3}}\] solution to give sodium salt and carbon dioxide?

Which is not true about acetophenone?

Which of the following will respond to Cannizzaro's reaction?

The correct product of the following sequence of reactions \[\xrightarrow[{{H}_{3}}{{O}^{+}}]{NaOH.{{H}_{2}}O,\Delta }\xrightarrow{\Delta }?\]

Clemmensen reduction of a ketone is carried out in the presence of:

The starting compounds needed to make the following compound?

Ethanol can be prepared more easily by which reaction?(i) \[C{{H}_{3}}C{{H}_{2}}Br+{{H}_{2}}O\xrightarrow{{}}C{{H}_{3}}C{{H}_{2}}OH\](ii) \[C{{H}_{3}}C{{H}_{2}}Br+A{{g}_{2}}O\left( in\text{ }boiling\text{ }water \right)\xrightarrow{{}}\]\[C{{H}_{3}}C{{H}_{2}}OH\]

In the reaction: \[C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,H-C{{H}_{2}}-O-C{{H}_{2}}-C{{H}_{3}}+HI\xrightarrow{Heated}\]Which of the following compounds will be formed?

\[\underset{\left( {{C}_{5}}{{H}_{10}}O \right)}{\mathop{\left( X \right)}}\,~\xrightarrow{{{H}_{3}}{{O}^{+}}}Y+Z\](Y and Z both give the lodoform test). The compound X is -

Identify Z in the sequence: \[C{{H}_{3}}C{{H}_{2}}CH=C{{H}_{2}}\xrightarrow{HBr/{{H}_{2}}{{O}_{2}}}\] \[Y\xrightarrow{{{C}_{2}}{{H}_{5}}ONa}Z\]

Acetic anhydride reacts with diethyl ether in the presence of anhydrous \[AlC{{l}_{3}}\] to give

The product of the following reaction,

tert-Butyl ethyl ether can't be prepared by which reaction?

On reaction with sodium, 1 mol of a compound X gives 1 mol of \[{{H}_{2}}\] Which one of the following compounds might be X?

The reaction of phenol with benzoyl chloride to give phenyl benzoate is known as:

1176.	The correct product of the following sequence of reactions \[\xrightarrow[{{H}_{3}}{{O}^{+}}]{NaOH.{{H}_{2}}O,\Delta }\xrightarrow{\Delta }?\]
A.	4 - heptanone
B.	4 - methyl -3 - hexanone
C.	2 - ethyl pentanoic acid
D.	2 - propyl butanoic acid
Answer» B. 4 - methyl -3 - hexanone

1177.	Clemmensen reduction of a ketone is carried out in the presence of:
A.	\[LiAl{{H}_{4}}\]
B.	\[Zn-Hg\,with\,HCl\]
C.	Glycol with KOH
D.	\[{{H}_{2}}\] with Pt as catalyst
Answer» C. Glycol with KOH

1178.	The starting compounds needed to make the following compound?
A.	benzaldehyde and 3-pentanone
B.	acetophenone and 2-butanone
C.	acetophenone and butanal
D.	benzaldehyde and 2-pentanone
Answer» B. acetophenone and 2-butanone

1179.	Ethanol can be prepared more easily by which reaction?(i) \[C{{H}_{3}}C{{H}_{2}}Br+{{H}_{2}}O\xrightarrow{{}}C{{H}_{3}}C{{H}_{2}}OH\](ii) \[C{{H}_{3}}C{{H}_{2}}Br+A{{g}_{2}}O\left( in\text{ }boiling\text{ }water \right)\xrightarrow{{}}\]\[C{{H}_{3}}C{{H}_{2}}OH\]
A.	by (i) reaction
B.	by (ii) reaction
C.	Both reactions proceed at same rate
D.	by none
Answer» C. Both reactions proceed at same rate

1180.	In the reaction: \[C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{\|}{\mathop{C}}\,}}\,H-C{{H}_{2}}-O-C{{H}_{2}}-C{{H}_{3}}+HI\xrightarrow{Heated}\]Which of the following compounds will be formed?
A.	\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{\|}{\mathop{C}}\,}}\,H-C{{H}_{3}}+C{{H}_{3}}C{{H}_{2}}OH\]
B.	\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{\|}{\mathop{C}}\,}}\,H-C{{H}_{2}}OH+C{{H}_{3}}C{{H}_{3}}\]
C.	\[C{{H}_{3}}-\underset{{}}{\mathop{\underset{{}}{\mathop{\overset{C{{H}_{3}}}{\mathop{\overset{\|}{\mathop{C}}\,}}\,}}\,}}\,H-C{{H}_{2}}OH+C{{H}_{3}}-C{{H}_{2}}-I\]
D.	\[C{{H}_{3}}-\underset{{}}{\mathop{\underset{{}}{\mathop{\overset{C{{H}_{3}}}{\mathop{\overset{\|}{\mathop{C}}\,}}\,}}\,}}\,H-C{{H}_{2}}-I+C{{H}_{3}}C{{H}_{2}}OH\]
Answer» D. \[C{{H}_{3}}-\underset{{}}{\mathop{\underset{{}}{\mathop{\overset{C{{H}_{3}}}{\mathop{\overset{\|}{\mathop{C}}\,}}\,}}\,}}\,H-C{{H}_{2}}-I+C{{H}_{3}}C{{H}_{2}}OH\]

1181.	\[\underset{\left( {{C}_{5}}{{H}_{10}}O \right)}{\mathop{\left( X \right)}}\,~\xrightarrow{{{H}_{3}}{{O}^{+}}}Y+Z\](Y and Z both give the lodoform test). The compound X is -
A.	\[C{{H}_{3}}-CH=CH-O-C{{H}_{2}}-C{{H}_{3}}\]
B.	\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{H}{\mathop{\underset{\|}{\overset{\|}{\mathop{C}}}\,}}}\,-O-C{{H}_{2}}-C{{H}_{3}}\]
C.	\[C{{H}_{3}}-\underset{C{{H}_{2}}}{\overset{{}}{\mathop{\underset{\|\|}{\overset{{}}{\mathop{C}}}\,}}}\,-O-C{{H}_{2}}-C{{H}_{3}}\]
D.	Both [a] and [c]
Answer» D. Both [a] and [c]

1182.	Identify Z in the sequence: \[C{{H}_{3}}C{{H}_{2}}CH=C{{H}_{2}}\xrightarrow{HBr/{{H}_{2}}{{O}_{2}}}\] \[Y\xrightarrow{{{C}_{2}}{{H}_{5}}ONa}Z\]
A.	\[{{(C{{H}_{3}})}_{2}}COHC{{H}_{2}}C{{H}_{3}}\]
B.	\[C{{H}_{3}}C{{H}_{2}}CH\left( C{{H}_{3}} \right)-O-C{{H}_{2}}C{{H}_{3}}\]
C.	\[C{{H}_{3}}{{\left( C{{H}_{2}} \right)}_{3}}-O-C{{H}_{2}}C{{H}_{3}}\]
D.	\[C{{H}_{3}}{{\left( C{{H}_{2}} \right)}_{4}}-O-C{{H}_{3}}\]
Answer» D. \[C{{H}_{3}}{{\left( C{{H}_{2}} \right)}_{4}}-O-C{{H}_{3}}\]

1183.	Acetic anhydride reacts with diethyl ether in the presence of anhydrous \[AlC{{l}_{3}}\] to give
A.	\[C{{H}_{3}}COOC{{H}_{3}}\]
B.	\[C{{H}_{3}}C{{H}_{2}}COOC{{H}_{3}}\]
C.	\[C{{H}_{3}}COOC{{H}_{2}}C{{H}_{3}}\]
D.	\[C{{H}_{3}}C{{H}_{2}}OH\]
Answer» D. \[C{{H}_{3}}C{{H}_{2}}OH\]

1184.	The product of the following reaction,
A.	\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{\|}{\overset{\|}{\mathop{C}}}\,}}}\,-\underset{OH}{\mathop{\underset{\|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\]
B.	\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{\|}{\overset{\|}{\mathop{C}}}\,}}}\,-\underset{{}}{\mathop{\underset{{}}{\mathop{C}}\,}}\,{{H}_{2}}-C{{H}_{2}}OH\]
C.	\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{OH}{\mathop{\underset{\|}{\overset{\|}{\mathop{C}}}\,}}}\,-\underset{C{{H}_{3}}}{\mathop{\underset{\|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\]
D.	\[HOC{{H}_{2}}-\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{\|}{\overset{\|}{\mathop{C}}}\,}}}\,-\underset{{}}{\mathop{\underset{{}}{\mathop{C}}\,}}\,{{H}_{2}}-C{{H}_{3}}\]
Answer» B. \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{\|}{\overset{\|}{\mathop{C}}}\,}}}\,-\underset{{}}{\mathop{\underset{{}}{\mathop{C}}\,}}\,{{H}_{2}}-C{{H}_{2}}OH\]

1185.	tert-Butyl ethyl ether can't be prepared by which reaction?
A.	tert- Butanol + ethanol \[\xrightarrow{{{H}^{+}}}\]
B.	tert-Butyl bromide + sodium ethoxide \[\to \]
C.	Sodium tert-butoxide + ethyl bromide \[\to \]
D.	Isobutene + ethanol \[\xrightarrow{{{H}^{+}}}\]
Answer» C. Sodium tert-butoxide + ethyl bromide \[\to \]