11242 + Mcqs in Chemistry Page 180 McqOptions

8951.	\[Cl-C-Cl\] angle in 1, 1, 2, 2 - tetrachloroethene and tetrachloromethane respectively are about [IIT-JEE 1988]
A.	\[{{120}^{o}}\] and \[{{109.5}^{o}}\]
B.	\[{{90}^{o}}\] and \[{{109.5}^{o}}\]
C.	\[{{109.5}^{o}}\] and \[{{90}^{o}}\]
D.	\[{{109.5}^{o}}\] and \[{{120}^{o}}\]
Answer» B. \[{{90}^{o}}\] and \[{{109.5}^{o}}\]

Discussion

8952.	The process, in which no heat enters or leaves the system, is termed as [Pb. PMT 1999; Kerala (Med.) 2002; J & K 2005]
A.	Isochoric
B.	Isobaric
C.	Isothermal
D.	Adiabatic
Answer» E.

Discussion

8953.	Write the IUPAC name of \[C{{H}_{3}}-\underset{OH\,}{\overset{H\,}{\mathop{\underset{\|\,\,\,\,\,\,}{\overset{\|\,\,\,\,\,}{\mathop{\,C\,-\,}}}\,}}}\,C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-\underset{Br}{\overset{Br}{\mathop{\underset{\|\,\,\,}{\overset{\|\,\,\,\,}{\mathop{C\,}}}\,}}}\,-C{{H}_{3}}\] [DCE 2001]
A.	6, 6-dibromoheptane-2-ol
B.	2, 2-dibromoheptane-6-ol
C.	6, 6 dibromoheptane-2-ol
D.	None of these
Answer» B. 2, 2-dibromoheptane-6-ol

Discussion

8954.	The compound which has one isopropyl group is [IIT-JEE 1989; MP PMT 2001]
A.	2, 2, 3, 3-tetramethyl pentane
B.	3, 3-dimethyl pentane
C.	2, 2, 3-trimethyl pentane
D.	2-methyl pentane
Answer» E.

Discussion

8955.	Which of the following has lowest freezing point [NCERT 1981]
A.	\[0.1\,M\] aqueous solution of glucose
B.	\[0.1\,M\] aqueous solution of \[NaCl\]
C.	\[0.1M\] aqueous solution of \[ZnS{{O}_{4}}\]
D.	\[0.1\,M\] aqueous solution of urea
Answer» C. \[0.1M\] aqueous solution of \[ZnS{{O}_{4}}\]

Discussion

8956.	Which of the following catalyses the conversion of glucose into ethanol [CPMT 1983, 84; CBSE PMT 1989; KCET 1993]
A.	Zymase
B.	Invertase
C.	Maltase
D.	Diastase
Answer» B. Invertase

Discussion

8957.	Which of the following exhibits the weakest intermolecular forces [AIIMS 2000]
A.	\[N{{H}_{3}}\]
B.	\[HCl\]
C.	\[He\]
D.	\[{{H}_{2}}O\]
Answer» D. \[{{H}_{2}}O\]

Discussion

8958.	Galvanisation is the [CPMT 1980, 86, 91, 99; MP PET/PMT 1988; Pb. PET 1999]
A.	Deposition of \[Zn\] on \[Fe\]
B.	Deposition of \[Al\] on \[Fe\]
C.	Deposition of \[Sn\] on \[Fe\]
D.	Deposition of \[Cu\] on \[Fe\]
Answer» B. Deposition of \[Al\] on \[Fe\]

Discussion

8959.	Which one of the following process is non-spontaneous
A.	Dissolution of \[CuS{{O}_{4}}\] in water
B.	Reaction between \[{{H}_{2}}\] and \[{{O}_{2}}\] to form water
C.	Water flowing down hill
D.	Flow of electric current from low potential to high potential
Answer» E.

Discussion

8960.	Spelter is [CPMT 1988]
A.	Impure \[Cu\]
B.	Impure \[Zn\]
C.	Zn\[O\]
D.	\[CuO\]
Answer» C. Zn\[O\]

Discussion

8961.	\[AgCl\] when heated with \[N{{a}_{2}}C{{O}_{3}}\] gives [CPMT 1980; MP PET 1989; MP PMT 1982, 84]
A.	\[A{{g}_{2}}O\]
B.	\[Ag\]
C.	\[A{{g}_{2}}C{{O}_{3}}\]
D.	\[NaAgC{{O}_{3}}\]
Answer» C. \[A{{g}_{2}}C{{O}_{3}}\]

Discussion

8962.	Acidified potassium dichromate is treated with hydrogen sulphide. In the reaction, the oxidation number of chromium [MP PET 1996]
A.	Increases from + 3 to + 6
B.	Decreases from +6 to +3
C.	Remains unchanged
D.	Decreases from +6 to +2
Answer» C. Remains unchanged

Discussion

8963.	Physical adsorption
A.	Involves the weak attractive interaction between the adsorbent and adsorbate
B.	Involves the chemical interactions between the adsorbent and adsorbate
C.	Is irreversible in nature
D.	Increases with increase of temperature
Answer» B. Involves the chemical interactions between the adsorbent and adsorbate

Discussion

8964.	The structure of di-chloromethane is [MP PMT 1995]
A.	Tetrahedral
B.	Trigonal
C.	Linear
D.	Hexagonal
Answer» B. Trigonal

Discussion

8965.	The \[pH\]indicators are [KCET 1996]
A.	Salts of strong acids and strong bases
B.	Salts of weak acids and weak bases
C.	Either weak acids or weak bases
D.	Either strong acids or strong bases
Answer» D. Either strong acids or strong bases

Discussion

8966.	Radioactivity of naptunium stops when it is converted to [JIPMER 2001]
A.	Bi
B.	Rn
C.	Th
D.	Pb
Answer» B. Rn

Discussion

8967.	Monohalides on reacting with alcoholic KOH give [MP PET 1982, 86; DPMT 1981; CPMT 1979, 83]
A.	Alkanes
B.	Alkenes
C.	Alkynes
D.	Aromatic hydrocarbons
Answer» C. Alkynes

Discussion

8968.	Sugars are
A.	Optically active polyhydroxy aldehydes
B.	Optically active polyhydroxy ketones
C.	Optically active polyhydroxy aldehydes or ketones
D.	Polyhydroxy aldehydes or ketones which may or may not be optically active
Answer» E.

Discussion

8969.	The colour given to the flame by sodium salts is [CPMT 1980; MP PET 1986]
A.	Light red
B.	Golden yellow
C.	Green
D.	Pink
Answer» C. Green

Discussion

8970.	A radioactive element resembling iodine in properties is [Kurukeshetra CEE 1998]
A.	Astatine
B.	Lead
C.	Radium
D.	Thorium
Answer» B. Lead

Discussion

8971.	The colour of \[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}Fe{{(S{{O}_{4}})}_{3}}.24{{H}_{2}}O\] is [BHU 1982; CPMT 1989]
A.	White
B.	Green
C.	Violet
D.	Blue
Answer» C. Violet

Discussion

8972.	The most acidic compound in water is [CBSE PMT 2001]
A.	\[AlC{{l}_{3}}\]
B.	\[BeC{{l}_{2}}\]
C.	\[FeC{{l}_{3}}\]
D.	None of these
Answer» D. None of these

Discussion

8973.	Lewis acid are those substances [MP PMT 1987]
A.	Which accept electron pair
B.	Which provide \[{{H}^{+}}\]ion in the solution
C.	Which give electron pair
D.	Which accept \[O{{H}^{-}}\]ion
Answer» B. Which provide \[{{H}^{+}}\]ion in the solution

Discussion

8974.	Most common reactions of benzene (aromatic hydrocarbon) and its derivatives are [DPMT 1984; MP PMT 1989; AFMC 1997; BHU 1996, 98]
A.	Electrophilic addition reactions
B.	Electrophilic substitution reactions
C.	Nucleophilic addition reactions
D.	Nucleophilic substitution reactions
Answer» C. Nucleophilic addition reactions

Discussion

8975.	30 ml of acid solution is neutralized by 15 ml of a 0.2 N base. The strength of acid solution is [CPMT 1986]
A.	0.1 N
B.	0.15 N
C.	0.3 N
D.	0.4 N
Answer» B. 0.15 N

Discussion

8976.	Which of the following is a colligative property [BHU 1990; NCERT 1983; MP PMT 1983; DPMT 1981, 83; MP PET/PMT 1998; AIIMS 1999; Pb. CET 2000]
A.	Surface tension
B.	Viscosity
C.	Osmotic pressure
D.	Optical rotation
Answer» D. Optical rotation

Discussion

8977.	Which of the following is used widely in the manufacture of lead storage battery [BHU 2004]
A.	Arsenic
B.	Lithium
C.	Bismuth
D.	Antimony
Answer» E.

Discussion

8978.	The wire of flash bulb is made of [CPMT 1988]
A.	\[Mg\]
B.	\[Cu\]
C.	\[Ba\]
D.	\[Ag\]
Answer» B. \[Cu\]

Discussion

8979.	Which of the following has lowest knocking property
A.	Olefins
B.	Straight chain paraffins
C.	Aromatic hydrocarbons
D.	Branched chain paraffins
Answer» D. Branched chain paraffins

Discussion

8980.	Zn gives hydrogen gas with \[{{H}_{2}}S{{O}_{4}}\]and \[HCl\] but not with \[HN{{O}_{3}}\] because [CBSE PMT 2002]
A.	\[N{{O}_{2}}\]is reduced in preference to \[{{H}_{3}}{{O}^{+}}\]
B.	\[HN{{O}_{3}}\]is weaker acid than \[{{H}_{2}}S{{O}_{4}}\] and \[HCl\]
C.	\[Zn\]acts as oxidising agent when reacts with \[HN{{O}_{3}}\]
D.	In electrochemical series \[Zn\]is placed above the hydrogen
Answer» C. \[Zn\]acts as oxidising agent when reacts with \[HN{{O}_{3}}\]

Discussion

8981.	\[\underset{\text{(anode)}\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{Z{{n}_{(s)}}\|Z{{n}^{2+}}_{(aq)}\|}}\,\|\underset{\text{(cathode)}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{u}^{2+}}_{(aq)}\|C{{u}_{(s)}}}}\,\]is [Kerala (Engg.) 2002]
A.	Weston cell
B.	Daniel cell
C.	Calomel cell
D.	Faraday cell
E.	Standard cell
Answer» C. Calomel cell

Discussion

8982.	The solubility product of \[BaS{{O}_{4}}\] is \[1.5\times {{10}^{-9}}.\] The precipitation in a 0.01 \[M\,\,B{{a}^{2+}}\]solution will start, on adding \[{{H}_{2}}S{{O}_{4}}\] of concentration [CPMT 1988]
A.	\[{{10}^{-9}}M\]
B.	\[{{10}^{-8}}M\]
C.	\[{{10}^{-7}}M\]
D.	\[{{10}^{-6}}M\]
Answer» D. \[{{10}^{-6}}M\]

Discussion

8983.	When copper turnings and concentrated \[HCl\] is heated with copper sulphate the compound formed is [CPMT 1984]
A.	Cupric chloride
B.	Cuprous chloride
C.	Copper sulphate
D.	\[S{{O}_{2}}\]
Answer» C. Copper sulphate

Discussion

8984.	For which ore of the metal, froth floatation method is used for concentration [MP PMT 2001]
A.	Horn silver
B.	Bauxite
C.	Cinnabar
D.	Haematite
Answer» D. Haematite

Discussion

8985.	(i) A strong acid has a weak conjugate base (ii) An acid is an electron pair acceptor The above statements (i) and (ii)
A.	Correct
B.	Wrong
C.	(i) Correct and (ii) Wrong
D.	(i) Wrong and (ii) Correct
Answer» B. Wrong

Discussion

8986.	Chemical formula of rust is [BHU 1986; MP PET 1990]
A.	\[FeO\]
B.	\[F{{e}_{3}}{{O}_{4}}\]
C.	\[F{{e}_{2}}{{O}_{3}}.x{{H}_{2}}O\]
D.	\[FeO.\,x{{H}_{2}}O\]
Answer» D. \[FeO.\,x{{H}_{2}}O\]

Discussion

8987.	Pure \[NaCl\]is prepared by saturating a cold saturated solution of common salt in water with \[HCl\] gas. The principle used is [AFMC 1992]
A.	Le Chatelier principle
B.	Displacement law
C.	Common ion effect
D.	Fractional distillation
Answer» D. Fractional distillation

Discussion

8988.	The radius of electron in the first excited state of hydrogen atom is [MP PMT 2004]
A.	\[{{a}_{0}}\]
B.	\[4{{a}_{0}}\]
C.	\[2{{a}_{0}}\]
D.	\[8{{a}_{0}}\]
Answer» C. \[2{{a}_{0}}\]

Discussion

8989.	Which of the following has density greater than water [MP PET 1994]
A.	\[Li\]
B.	\[Na\]
C.	\[K\]
D.	\[Rb\]
Answer» E.

Discussion

8990.	If \[_{92}{{U}^{236}}\] nucleus emits one \[\alpha \]-particle, the remaining nucleus will have [MP PMT 1976, 80; BHU 1985; CPMT 1980]
A.	119 neutrons and 119 protons
B.	142 neutrons and 90 protons
C.	144 neutrons and 92 protons
D.	146 neutrons and 90 protons
Answer» C. 144 neutrons and 92 protons

Discussion

8991.	Monds process is used for [AFMC 2004]
A.	Ni
B.	Al
C.	Fe
D.	Cu
Answer» B. Al

Discussion

8992.	In a reaction \[C{{H}_{2}}=C{{H}_{2}}\underset{acid}{\mathop{\xrightarrow{\text{Hypochlorous}}}}\,M\xrightarrow{R}\begin{matrix} C{{H}_{2}} & - & OH \\ \|\,\,\,\,\,\,\, & {} & {} \\ C{{H}_{2}} & - & OH \\ \end{matrix}\] Where M = molecule; R = reagent M and R are [CBSE PMT 1997; CPMT 2001]
A.	\[C{{H}_{3}}C{{H}_{2}}Cl\] and NaOH
B.	\[C{{H}_{2}}Cl-C{{H}_{2}}OH\] and \[\text{aq}\text{. }NaHC{{O}_{3}}\]
C.	\[C{{H}_{3}}C{{H}_{2}}OH\] and HCl
D.	\[C{{H}_{2}}=C{{H}_{2}}\] and heat
Answer» C. \[C{{H}_{3}}C{{H}_{2}}OH\] and HCl

Discussion

8993.	Which will not be hydrolysed [MP PMT 1989]
A.	Potassium nitrate
B.	Potassium cyanide
C.	Potassium succinate
D.	Potassium carbonate
Answer» B. Potassium cyanide

Discussion

8994.	Movement of colloidal particles under the influence of electrostatic field is [AMU 1985, 88,02; MP PMT 1987, 89; CPMT 1988,94; Roorkee 1995; MP PET 1992; AIIMS 2001; UPSEAT 2004]
A.	Electrophoresis
B.	Electrolysis
C.	Dialysis
D.	Ionisation
Answer» B. Electrolysis

Discussion

8995.	Which of the following compound have wrong IUPAC name [AIEEE 2002]
A.	\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-COO-C{{H}_{2}}C{{H}_{3}}\]® ethyl butanoate
B.	\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{\|\,\,\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{2}}-CHO\] ®3-methyl-butanal
C.	\[C{{H}_{3}}-\underset{OH}{\mathop{\underset{\|\,\,\,\,\,}{\mathop{CH}}\,}}\,-\underset{C{{H}_{3}}}{\mathop{\underset{\|\,\,\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{3}}\]® 2-methyl-3-butanol
D.	\[C{{H}_{3}}-\underset{\underset{C{{H}_{3}}\,\,\,}{\mathop{\|\,\,\,\,\,\,\,\,\,\,\,}}\,}{\mathop{CH\,\,\,-\,\,}}\,\overset{\overset{O}{\mathop{\|\,\|}}\,}{\mathop{C}}\,-C{{H}_{2}}-C{{H}_{3}}\]®2-methyl-3 pentanone
Answer» D. \[C{{H}_{3}}-\underset{\underset{C{{H}_{3}}\,\,\,}{\mathop{\|\,\,\,\,\,\,\,\,\,\,\,}}\,}{\mathop{CH\,\,\,-\,\,}}\,\overset{\overset{O}{\mathop{\|\,\|}}\,}{\mathop{C}}\,-C{{H}_{2}}-C{{H}_{3}}\]®2-methyl-3 pentanone

Discussion

8996.	When carbon monoxide is passed over solid caustic soda heated to \[{{200}^{o}}\]C, it forms [KCET (Med.) 1999]
A.	\[N{{a}_{2}}C{{O}_{3}}\]
B.	\[NaHC{{O}_{3}}\]
C.	\[H-COONa\]
D.	\[C{{H}_{3}}COONa\]
Answer» D. \[C{{H}_{3}}COONa\]

Discussion

8997.	Type metal is an alloy of \[Pb,\,Sb\]and \[Sn\]. It consists of
A.	Equal amounts of the three metals
B.	More amount of lead
C.	More amount of antimony
D.	More amount of tin
Answer» C. More amount of antimony

Discussion

8998.	The mass number of an anion, \[{{X}^{3-}}\], is 14. If there are ten electrons in the anion, the number of neutrons in the nucleus of atom, \[{{X}_{2}}\] of the element will be [MP PMT 1999]
A.	10
B.	14
C.	7
D.	5
Answer» D. 5

Discussion

8999.	Which process converts olefins into parafins [MP PET 2002]
A.	Halogenation
B.	Dehydration
C.	Hydrogenation
D.	Hydrolysis
Answer» D. Hydrolysis

Discussion

9000.	Which one of the following metalic hydroxides does not dissolve in sodium hydroxide solution [KCET (Med.) 2001]
A.	\[Zn{{(OH)}_{2}}\]
B.	\[Al{{(OH)}_{3}}\]
C.	\[Fe{{(OH)}_{3}}\]
D.	\[Pb{{(OH)}_{2}}\]
Answer» D. \[Pb{{(OH)}_{2}}\]

Discussion

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

\[Cl-C-Cl\] angle in 1, 1, 2, 2 - tetrachloroethene and tetrachloromethane respectively are about [IIT-JEE 1988]

The process, in which no heat enters or leaves the system, is termed as [Pb. PMT 1999; Kerala (Med.) 2002; J & K 2005]

The compound which has one isopropyl group is [IIT-JEE 1989; MP PMT 2001]

Which of the following has lowest freezing point [NCERT 1981]

Which of the following catalyses the conversion of glucose into ethanol [CPMT 1983, 84; CBSE PMT 1989; KCET 1993]

Which of the following exhibits the weakest intermolecular forces [AIIMS 2000]

Galvanisation is the [CPMT 1980, 86, 91, 99; MP PET/PMT 1988; Pb. PET 1999]

Which one of the following process is non-spontaneous

Spelter is [CPMT 1988]

\[AgCl\] when heated with \[N{{a}_{2}}C{{O}_{3}}\] gives [CPMT 1980; MP PET 1989; MP PMT 1982, 84]

Acidified potassium dichromate is treated with hydrogen sulphide. In the reaction, the oxidation number of chromium [MP PET 1996]

Physical adsorption

The structure of di-chloromethane is [MP PMT 1995]

The \[pH\]indicators are [KCET 1996]

Radioactivity of naptunium stops when it is converted to [JIPMER 2001]

Monohalides on reacting with alcoholic KOH give [MP PET 1982, 86; DPMT 1981; CPMT 1979, 83]

Sugars are

The colour given to the flame by sodium salts is [CPMT 1980; MP PET 1986]

A radioactive element resembling iodine in properties is [Kurukeshetra CEE 1998]

The colour of \[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}Fe{{(S{{O}_{4}})}_{3}}.24{{H}_{2}}O\] is [BHU 1982; CPMT 1989]

The most acidic compound in water is [CBSE PMT 2001]

Lewis acid are those substances [MP PMT 1987]

Most common reactions of benzene (aromatic hydrocarbon) and its derivatives are [DPMT 1984; MP PMT 1989; AFMC 1997; BHU 1996, 98]

30 ml of acid solution is neutralized by 15 ml of a 0.2 N base. The strength of acid solution is [CPMT 1986]

Which of the following is a colligative property [BHU 1990; NCERT 1983; MP PMT 1983; DPMT 1981, 83; MP PET/PMT 1998; AIIMS 1999; Pb. CET 2000]

Which of the following is used widely in the manufacture of lead storage battery [BHU 2004]

The wire of flash bulb is made of [CPMT 1988]

Which of the following has lowest knocking property

Zn gives hydrogen gas with \[{{H}_{2}}S{{O}_{4}}\]and \[HCl\] but not with \[HN{{O}_{3}}\] because [CBSE PMT 2002]

\[\underset{\text{(anode)}\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{Z{{n}_{(s)}}|Z{{n}^{2+}}_{(aq)}|}}\,|\underset{\text{(cathode)}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{u}^{2+}}_{(aq)}|C{{u}_{(s)}}}}\,\]is [Kerala (Engg.) 2002]

The solubility product of \[BaS{{O}_{4}}\] is \[1.5\times {{10}^{-9}}.\] The precipitation in a 0.01 \[M\,\,B{{a}^{2+}}\]solution will start, on adding \[{{H}_{2}}S{{O}_{4}}\] of concentration [CPMT 1988]

When copper turnings and concentrated \[HCl\] is heated with copper sulphate the compound formed is [CPMT 1984]

For which ore of the metal, froth floatation method is used for concentration [MP PMT 2001]

(i) A strong acid has a weak conjugate base (ii) An acid is an electron pair acceptor The above statements (i) and (ii)

Chemical formula of rust is [BHU 1986; MP PET 1990]

Pure \[NaCl\]is prepared by saturating a cold saturated solution of common salt in water with \[HCl\] gas. The principle used is [AFMC 1992]

The radius of electron in the first excited state of hydrogen atom is [MP PMT 2004]

Which of the following has density greater than water [MP PET 1994]

If \[_{92}{{U}^{236}}\] nucleus emits one \[\alpha \]-particle, the remaining nucleus will have [MP PMT 1976, 80; BHU 1985; CPMT 1980]

Monds process is used for [AFMC 2004]

In a reaction \[C{{H}_{2}}=C{{H}_{2}}\underset{acid}{\mathop{\xrightarrow{\text{Hypochlorous}}}}\,M\xrightarrow{R}\begin{matrix} C{{H}_{2}} & - & OH \\ |\,\,\,\,\,\,\, & {} & {} \\ C{{H}_{2}} & - & OH \\ \end{matrix}\] Where M = molecule; R = reagent M and R are [CBSE PMT 1997; CPMT 2001]

Which will not be hydrolysed [MP PMT 1989]

Movement of colloidal particles under the influence of electrostatic field is [AMU 1985, 88,02; MP PMT 1987, 89; CPMT 1988,94; Roorkee 1995; MP PET 1992; AIIMS 2001; UPSEAT 2004]

Which of the following compound have wrong IUPAC name [AIEEE 2002]

When carbon monoxide is passed over solid caustic soda heated to \[{{200}^{o}}\]C, it forms [KCET (Med.) 1999]

Type metal is an alloy of \[Pb,\,Sb\]and \[Sn\]. It consists of

The mass number of an anion, \[{{X}^{3-}}\], is 14. If there are ten electrons in the anion, the number of neutrons in the nucleus of atom, \[{{X}_{2}}\] of the element will be [MP PMT 1999]

Which process converts olefins into parafins [MP PET 2002]

Which one of the following metalic hydroxides does not dissolve in sodium hydroxide solution [KCET (Med.) 2001]