11242 + Mcqs in Chemistry Page 225 McqOptions

11201.	In order to make alcohol undrinkable pyridine and methanol are added to it. The resulting alcohol is called
A.	Power alcohol
B.	Proof spirit
C.	Denatured spirit
D.	Poison alcohol
Answer» D. Poison alcohol

Discussion

11202.	Power alcohol is [KCET 1990]
A.	An alcohol of 95% purity
B.	A mixture of petrol hydrocarbons and ethanol
C.	Rectified spirit
D.	A mixture of methanol and ethanol
Answer» C. Rectified spirit

Discussion

11203.	Glycerol is used in the manufacture of [SCRA 1991]
A.	Dynamite
B.	Varnish
C.	Paints
D.	Soft drinks
Answer» B. Varnish

Discussion

11204.	Electrophilic substitution reaction in phenol take place at [RPMT 2002]
A.	p- position
B.	m- position
C.	o- position
D.	o- and p- position
Answer» E.

Discussion

11205.	Which of the following reagents convert the propene to 1-propanol [CBSE PMT 2000]
A.	\[{{H}_{2}}O,\ {{H}_{2}}S{{O}_{4}}\]
B.	Aqueous \[KOH\]
C.	\[MgS{{O}_{4}},\ NaB{{H}_{4}}/{{H}_{2}}O\]
D.	\[{{B}_{2}}{{H}_{6}},\ {{H}_{2}}{{O}_{2}},\ O{{H}^{-}}\]
Answer» C. \[MgS{{O}_{4}},\ NaB{{H}_{4}}/{{H}_{2}}O\]

Discussion

11206.	Methanol and ethanol are distinguished by the [MP PET 1999]
A.	Action of HCl
B.	Iodoform test
C.	Solubility in water
D.	Sodium
Answer» C. Solubility in water

Discussion

11207.	Absolute ethanol cannot be obtained by simple fraction of a solution of ethanol and water because [KCET 1984; MP PMT 1987]
A.	Their B.P.'s are very nearer
B.	Ethanol remains dissolved in water
C.	They form a constant boiling mixture
D.	Ethanol molecules are solvated
Answer» D. Ethanol molecules are solvated

Discussion

11208.	An alcohol on oxidation is found to give \[C{{H}_{3}}COOH\] and \[C{{H}_{3}}C{{H}_{2}}COOH.\] The structure of the alcohol is [BIT 1990]
A.	\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\]
B.	\[{{(C{{H}_{3}})}_{2}}C(OH)C{{H}_{2}}C{{H}_{3}}\]
C.	\[C{{H}_{3}}C{{H}_{2}}CHOHC{{H}_{3}}\]
D.	\[C{{H}_{3}}CH(OH)C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\]
Answer» E.

Discussion

11209.	Which reagent is useful in converting 1-butanol to 1-bromobutane [EAMCET 1989]
A.	\[CHB{{r}_{3}}\]
B.	\[B{{r}_{2}}\]
C.	\[C{{H}_{3}}Br\]
D.	\[PB{{r}_{3}}\]
Answer» E.

Discussion

11210.	In the Liebermann's nitroso reaction, sequential changes in the colour of phenol occurs as [AFMC 1998; BHU 1999]
A.	Brown or red \[\to \] green \[\to \] red \[\to \] deep blue
B.	Red \[\to \] deep blue \[\to \] green
C.	Red \[\to \] green \[\to \] white
D.	White \[\to \] red \[\to \] green
Answer» B. Red \[\to \] deep blue \[\to \] green

Discussion

11211.	At higher temperature, iodoform reaction is given by [AIIMS 2003]
A.	\[C{{H}_{3}}C{{O}_{2}}C{{H}_{3}}\]
B.	\[C{{H}_{3}}C{{O}_{2}}{{C}_{2}}{{H}_{5}}\]
C.	\[{{C}_{6}}{{H}_{5}}C{{O}_{2}}C{{H}_{3}}\]
D.	\[C{{H}_{3}}C{{O}_{2}}{{C}_{6}}{{H}_{5}}\]
Answer» E.

Discussion

11212.	Ethylene glycol, on oxidation with per-iodic acid, gives [NCERT 1983; CPMT 1983]
A.	Oxalic acid
B.	Glycol
C.	Formaldehyde
D.	Glycollic acid
Answer» D. Glycollic acid

Discussion

11213.	A compound does not react with 2.4 di-nitrophenyl hydrazine and Na , compound is [UPSEAT 2003]
A.	Acetone
B.	Acetaldehyde
C.	\[C{{H}_{3}}OH\]
D.	\[C{{H}_{2}}=CHOC{{H}_{3}}\]
Answer» E.

Discussion

11214.	Which alcohol reacts with fatty acids to form fats [MP PMT/PET 1988; MP PET 1991]
A.	Ethanol
B.	Glycerol
C.	Methanol
D.	Isopropanol
Answer» C. Methanol

Discussion

11215.	Dehydration of 2-butanol yield [Pb. CET 2004]
A.	1-butene
B.	2-butene
C.	2-butyne
D.	Both A and B
Answer» E.

Discussion

11216.	At 530 K, glycerol reacts with oxalic acid to produce [Pb. CET 2002]
A.	Allyl alcohol
B.	Formic acid
C.	Glyceraldehyde
D.	Glycerol monooxalate
Answer» B. Formic acid

Discussion

11217.	A substance \[{{C}_{4}}{{H}_{10}}O\] yields on oxidation a compound \[{{C}_{4}}{{H}_{8}}O\] which gives an oxime and a positive iodoform test. The original substance on treatment with conc. \[{{H}_{2}}S{{O}_{4}}\] gives \[{{C}_{4}}{{H}_{8}}\]. The structure of the compound is [SCRA 2000]
A.	\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}OH\]
B.	\[C{{H}_{3}}CH(OH)C{{H}_{2}}C{{H}_{3}}\]
C.	\[{{(C{{H}_{3}})}_{3}}COH\]
D.	\[C{{H}_{3}}C{{H}_{2}}-O-C{{H}_{2}}C{{H}_{3}}\]
Answer» C. \[{{(C{{H}_{3}})}_{3}}COH\]

Discussion

11218.	Ether is formed when ethyl alcohol is heated with conc. \[{{H}_{2}}S{{O}_{4}}.\] The conditions are [KCET 1984]
A.	Excess of \[{{H}_{2}}S{{O}_{4}}\] and \[{{170}^{o}}C\]
B.	Excess of \[{{C}_{2}}{{H}_{5}}OH\] and \[{{140}^{o}}C\]
C.	Excess of \[{{C}_{2}}{{H}_{5}}OH\] and \[{{180}^{o}}C\]
D.	Excess of conc. \[{{H}_{2}}S{{O}_{4}}\] and \[{{100}^{o}}C\]
Answer» C. Excess of \[{{C}_{2}}{{H}_{5}}OH\] and \[{{180}^{o}}C\]

Discussion

11219.	Which of the following is most acidic [CPMT 1999]
A.	Phenol
B.	Benzyl alcohol
C.	m-chlorophenol
D.	Cyclohexanol
Answer» D. Cyclohexanol

Discussion

11220.	The ring deuteration of phenol
A.	Lowers the acidity
B.	Increases the acidity
C.	Imparts no effect
D.	Causes amphoteric nature
Answer» B. Increases the acidity

Discussion

11221.	Which compound is soluble in water [IIT-JEE 1980; CPMT 1993; RPET 1999]
A.	\[C{{S}_{2}}\]
B.	\[{{C}_{2}}{{H}_{5}}OH\]
C.	\[CC{{l}_{4}}\]
D.	\[CHC{{l}_{3}}\]
Answer» C. \[CC{{l}_{4}}\]

Discussion

11222.	By distilling glycol with fuming sulphuric acid, which of following is obtained
A.	Glycerol
B.	Pinacol
C.	Dioxan
D.	Ethylene oxide
Answer» D. Ethylene oxide

Discussion

11223.	Glycerol reacts with conc. \[HN{{O}_{3}}\] and conc. \[{{H}_{2}}S{{O}_{4}}\] to form [CPMT 1983; MP PMT/PET 1988]
A.	Glycerol mononitrate
B.	Glycerol dinitrate
C.	Glycerol trinitrate
D.	Acrolein
Answer» D. Acrolein

Discussion

11224.	Rate of substitution reaction in phenol is [MP PMT 1989]
A.	Slower than the rate of benzene
B.	Faster than the rate of benzene
C.	Equal to the rate of benzene
D.	None of these
Answer» C. Equal to the rate of benzene

Discussion

11225.	In the esterification reaction of alcohols [Bihar CEE 1995]
A.	\[O{{H}^{-}}\] is replaced by \[C{{H}_{3}}COO\] group
B.	\[O{{H}^{-}}\] is replaced by chlorine
C.	\[{{H}^{-}}\] is replaced by sodium metal
D.	\[O{{H}^{-}}\]is replaced by \[{{C}_{2}}{{H}_{5}}OH\]
Answer» B. \[O{{H}^{-}}\] is replaced by chlorine

Discussion

11226.	The alcohol which does not give a stable compound on dehydration is [MP PET 1997]
A.	Ethyl alcohol
B.	Methyl alcohol
C.	n-propyl alcohol
D.	n-butyl alcohol
Answer» C. n-propyl alcohol

Discussion

11227.	The strongest acid among the following aromatic compounds is [NCERT 1978]
A.	ortho-nitrophenol
B.	para-chlorophenol
C.	para-nitrophenol
D.	meta-nitrophenol
Answer» D. meta-nitrophenol

Discussion

11228.	By means of calcium chloride which of following can be dried
A.	Methanol
B.	Ethanol
C.	Both A and B
D.	None of these
Answer» E.

Discussion

11229.	Alcohols (i) \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH,\] (ii) \[C{{H}_{3}}-CHOH-C{{H}_{3}}\] and (iii) \[C{{H}_{3}}-C(C{{H}_{3}})(OH)-C{{H}_{3}}\] were treated with Lucas reagent (Conc. \[HCl+ZnC{{l}_{2}}).\] What results do you expect at room temperature
A.	(ii) and (iii) react immediately and (i) in about 5 minutes
B.	(iii) reacts immediately, (ii) reacts in about 5 minutes and (i) not at all
C.	(i) reacts immediately, (ii) reacts in about 5 minutes and (iii) not at all
D.	(i) reacts in about 5 minutes, (ii) reacts in about 15 minutes and (iii) not at all
Answer» C. (i) reacts immediately, (ii) reacts in about 5 minutes and (iii) not at all

Discussion

11230.	Which compound has hydrogen bonding [MP PMT 1992; MP PET 1991]
A.	Toluene
B.	Phenol
C.	Chlorobenzene
D.	Nitrobenzene
Answer» C. Chlorobenzene

Discussion

11231.	An organic compound X on treatment with acidified \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] gives a compound Y which reacts with \[{{I}_{2}}\] and sodium carbonate to form tri-odomethane. The compound X is [KCET 1996]
A.	\[C{{H}_{3}}OH\]
B.	\[C{{H}_{3}}-CO-C{{H}_{3}}\]
C.	\[C{{H}_{3}}CHO\]
D.	\[C{{H}_{3}}CH(OH)C{{H}_{3}}\]
Answer» E.

Discussion

11232.	Acetic acid and \[C{{H}_{3}}OH\] are obtained on large scale by destructive distillation of
A.	Wood
B.	Coal
C.	Turpentine
D.	Crude oil
Answer» B. Coal

Discussion

11233.	Coconut oil upon alkaline hydrolysis gives [MP PET 1991; AFMC 2000; KCET 2001; BCECE 2005]
A.	Glycol
B.	Alcohol
C.	Glycerol
D.	Ethylene oxide
Answer» D. Ethylene oxide

Discussion

11234.	The compound formed when ethyl bromide is heated with dry silver oxide is [MP PET/PMT 1988]
A.	Dimethyl ether
B.	Diethyl ether
C.	Methyl alcohol
D.	Ethyl alcohol
Answer» C. Methyl alcohol

Discussion

11235.	When an alkyl halide is allowed to react with a sodium alkoxide the product most likely is [MP PMT 1996; EAMCET 1998]
A.	An aldehyde
B.	A ketone
C.	An ether
D.	A carboxylic acid
Answer» D. A carboxylic acid

Discussion

11236.	Phenol is obtained by heating aqueous solution of [MP PMT 1995]
A.	Aniline
B.	Benzene diazonium chloride
C.	Benzoic acid
D.	None of these
Answer» C. Benzoic acid

Discussion

11237.	Which gas is eliminated in fermentation [RPMT 1997]
A.	\[{{O}_{2}}\]
B.	\[C{{O}_{2}}\]
C.	\[{{N}_{2}}\]
D.	\[{{H}_{2}}\]
Answer» C. \[{{N}_{2}}\]

Discussion

11238.	Phenolphthalein is obtained by heating phthalic anhydride with conc. \[{{H}_{2}}S{{O}_{4}}\] and [BHU 1996]
A.	Benzyl alcohol
B.	Benzene
C.	Phenol
D.	Benzoic acid
Answer» D. Benzoic acid

Discussion

11239.	Benzene diazonium chloride on boiling with dilute sulphuric acid gives [MP PMT 1983]
A.	Toluene
B.	Benzoic acid
C.	Benzene
D.	Phenol
Answer» E.

Discussion

11240.	The most appropriate reagents that can bring about the following transformation is
A.	\[KMn{{O}_{4}}/NaOH(aq)\]
B.	\[C{{F}_{3}}C{{O}_{3}}H\] then \[{{H}_{2}}S{{O}_{4}}({{H}_{2}}o)\]
C.	\[B{{r}_{2}}-{{H}_{2}}O\]then \[NaOH\]
D.	\[{{H}_{2}}S{{O}_{4}}\]
Answer» C. \[B{{r}_{2}}-{{H}_{2}}O\]then \[NaOH\]

Discussion

11241.	Which of the following will be obtained by keeping ether in contact with air for a long time [RPMT 2003]
A.	\[{{C}_{2}}{{H}_{5}}-O-CH\ (C{{H}_{3}})-O-OH\]
B.	\[{{C}_{2}}{{H}_{5}}-OC{{H}_{2}}-OH\]
C.	\[{{C}_{2}}{{H}_{5}}-O-{{C}_{2}}{{H}_{5}}OH\]
D.	\[C{{H}_{3}}-O\ CH\ (C{{H}_{3}})-O-OH\]
Answer» B. \[{{C}_{2}}{{H}_{5}}-OC{{H}_{2}}-OH\]

Discussion

11242.	The product ?A? in the following reaction is \[\begin{array}{*{35}{l}} {{H}_{2}}C\,\,C{{H}_{2}} \\ \begin{align} & \,\,\,\,\,\,\,\,\,\,\,\, \\ & \,\,\,\,\,\,\,\,\,\,\,\,\overset{\backslash /}{\mathop{O}}\, \\ \end{align} \\ \end{array}\xrightarrow{RMgI}A\] [MP PMT 2003]
A.	\[RCHOHR\]
B.	\[RCHOH\cdot C{{H}_{3}}\]
C.	\[R-C{{H}_{2}}-C{{H}_{2}}-OH\]
D.	\[\begin{array}{*{35}{l}} R \\ R \\ \end{array}>CHC{{H}_{2}}OH\]
Answer» D. \[\begin{array}{*{35}{l}} R \\ R \\ \end{array}>CHC{{H}_{2}}OH\]

Discussion

Explore topic-wise MCQs in Joint Entrance Exam - Main (JEE Main).

In order to make alcohol undrinkable pyridine and methanol are added to it. The resulting alcohol is called

Power alcohol is [KCET 1990]

Glycerol is used in the manufacture of [SCRA 1991]

Electrophilic substitution reaction in phenol take place at [RPMT 2002]

Which of the following reagents convert the propene to 1-propanol [CBSE PMT 2000]

Methanol and ethanol are distinguished by the [MP PET 1999]

Absolute ethanol cannot be obtained by simple fraction of a solution of ethanol and water because [KCET 1984; MP PMT 1987]

An alcohol on oxidation is found to give \[C{{H}_{3}}COOH\] and \[C{{H}_{3}}C{{H}_{2}}COOH.\] The structure of the alcohol is [BIT 1990]

Which reagent is useful in converting 1-butanol to 1-bromobutane [EAMCET 1989]

In the Liebermann's nitroso reaction, sequential changes in the colour of phenol occurs as [AFMC 1998; BHU 1999]

At higher temperature, iodoform reaction is given by [AIIMS 2003]

Ethylene glycol, on oxidation with per-iodic acid, gives [NCERT 1983; CPMT 1983]

A compound does not react with 2.4 di-nitrophenyl hydrazine and Na , compound is [UPSEAT 2003]

Which alcohol reacts with fatty acids to form fats [MP PMT/PET 1988; MP PET 1991]

Dehydration of 2-butanol yield [Pb. CET 2004]

At 530 K, glycerol reacts with oxalic acid to produce [Pb. CET 2002]

A substance \[{{C}_{4}}{{H}_{10}}O\] yields on oxidation a compound \[{{C}_{4}}{{H}_{8}}O\] which gives an oxime and a positive iodoform test. The original substance on treatment with conc. \[{{H}_{2}}S{{O}_{4}}\] gives \[{{C}_{4}}{{H}_{8}}\]. The structure of the compound is [SCRA 2000]

Ether is formed when ethyl alcohol is heated with conc. \[{{H}_{2}}S{{O}_{4}}.\] The conditions are [KCET 1984]

Which of the following is most acidic [CPMT 1999]

The ring deuteration of phenol

Which compound is soluble in water [IIT-JEE 1980; CPMT 1993; RPET 1999]

By distilling glycol with fuming sulphuric acid, which of following is obtained

Glycerol reacts with conc. \[HN{{O}_{3}}\] and conc. \[{{H}_{2}}S{{O}_{4}}\] to form [CPMT 1983; MP PMT/PET 1988]

Rate of substitution reaction in phenol is [MP PMT 1989]

In the esterification reaction of alcohols [Bihar CEE 1995]

The alcohol which does not give a stable compound on dehydration is [MP PET 1997]

The strongest acid among the following aromatic compounds is [NCERT 1978]

By means of calcium chloride which of following can be dried

Alcohols (i) \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH,\] (ii) \[C{{H}_{3}}-CHOH-C{{H}_{3}}\] and (iii) \[C{{H}_{3}}-C(C{{H}_{3}})(OH)-C{{H}_{3}}\] were treated with Lucas reagent (Conc. \[HCl+ZnC{{l}_{2}}).\] What results do you expect at room temperature

Which compound has hydrogen bonding [MP PMT 1992; MP PET 1991]

An organic compound X on treatment with acidified \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] gives a compound Y which reacts with \[{{I}_{2}}\] and sodium carbonate to form tri-odomethane. The compound X is [KCET 1996]

Acetic acid and \[C{{H}_{3}}OH\] are obtained on large scale by destructive distillation of

Coconut oil upon alkaline hydrolysis gives [MP PET 1991; AFMC 2000; KCET 2001; BCECE 2005]

The compound formed when ethyl bromide is heated with dry silver oxide is [MP PET/PMT 1988]

When an alkyl halide is allowed to react with a sodium alkoxide the product most likely is [MP PMT 1996; EAMCET 1998]

Phenol is obtained by heating aqueous solution of [MP PMT 1995]

Which gas is eliminated in fermentation [RPMT 1997]

Phenolphthalein is obtained by heating phthalic anhydride with conc. \[{{H}_{2}}S{{O}_{4}}\] and [BHU 1996]

Benzene diazonium chloride on boiling with dilute sulphuric acid gives [MP PMT 1983]

The most appropriate reagents that can bring about the following transformation is

Which of the following will be obtained by keeping ether in contact with air for a long time [RPMT 2003]

The product ?A? in the following reaction is \[\begin{array}{*{35}{l}} {{H}_{2}}C\,\,C{{H}_{2}} \\ \begin{align} & \,\,\,\,\,\,\,\,\,\,\,\, \\ & \,\,\,\,\,\,\,\,\,\,\,\,\overset{\backslash /}{\mathop{O}}\, \\ \end{align} \\ \end{array}\xrightarrow{RMgI}A\] [MP PMT 2003]