11242 + Mcqs in Chemistry Page 188 McqOptions

9351.	The IUPAC name of \[C{{H}_{3}}-\overset{Cl\,}{\mathop{\overset{\|\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{3}}\] is [Pb. CET 2000]
A.	2-chloropropane
B.	Chloropropane
C.	1-chloropropane
D.	2-chlorobutane
Answer» B. Chloropropane

Discussion

9352.	The IUPAC name of Gamaxene is [MP PET 2004]
A.	Benzene hexachloride
B.	Hexachlorobenzene
C.	1, 2, 3, 4, 5, 6, hexachlorobenzene
D.	1, 2, 3, 4, 5, 6, hexachlorocyclohexane
Answer» D. 1, 2, 3, 4, 5, 6, hexachlorocyclohexane

Discussion

9353.	In hydrogen spectrum the different lines of Lyman series are present is [UPSEAT 1999]
A.	UV field
B.	IR field
C.	Visible field
D.	Far IR field
Answer» B. IR field

Discussion

9354.	Which one of the following salt is most acidic in water [IIT 1995]
A.	\[NiC{{l}_{2}}\]
B.	\[BeC{{l}_{2}}\]
C.	\[FeC{{l}_{3}}\]
D.	\[AlC{{l}_{3}}\]
Answer» E.

Discussion

9355.	Colloidal solutions of gold prepared by different methods have different colours owing to [JIPMER 1999]
A.	The difference in the size of the colloidal particles
B.	The fact that gold exhibits a variable valency of + 1 and + 3
C.	Different concentrations of gold
D.	Presence of different types of foreign particles depending upon the method of preparation of the colloid
Answer» B. The fact that gold exhibits a variable valency of + 1 and + 3

Discussion

9356.	\[{{H}_{3}}P{{O}_{3}}\] gets hydrolysed giving ....... [Orissa JEE 2002]
A.	\[Si{{O}_{2}}\]
B.	\[Si{{(OH)}_{2}}{{F}_{2}}\]
C.	\[{{H}_{2}}Si{{F}_{6}}\]
D.	\[Si{{(OH)}_{4}}\]
Answer» E.

Discussion

9357.	Which of the following has smaller size [RPET 2003]
A.	\[H\]
B.	\[H{{e}^{+}}\]
C.	\[_{1}{{H}^{2}}\]
D.	\[L{{i}^{2+}}\]
Answer» E.

Discussion

9358.	The reactivity of the alkali metal sodium with water, is made use of [MP PMT 1994]
A.	In drying of alcohols
B.	In drying of benzene
C.	In drying of ammonia solution
D.	As a general drying agent
Answer» C. In drying of ammonia solution

Discussion

9359.	The extent of adsorption of a gas on a solid depends on [KCET 2005]
A.	Nature of the gas
B.	Pressure of the gas
C.	Temperature of the gas
D.	All are correct
Answer» E.

Discussion

9360.	Review the equilibrium and choose the correct statement \[HCl{{O}_{4}}+{{H}_{2}}O\] ⇄ \[{{H}_{3}}{{O}^{+}}+ClO_{4}^{-}\] [RPMT 2000]
A.	\[HCl{{O}_{4}}\] is the conjugate acid of \[{{H}_{2}}O\]
B.	\[{{H}_{3}}{{O}^{+}}\] is the conjugate base of \[{{H}_{2}}O\]
C.	\[{{H}_{2}}O\] is the conjugate acid of \[{{H}_{3}}{{O}^{+}}\]
D.	\[ClO_{4}^{-}\] is the conjugate base of \[HCl{{O}_{4}}\]
Answer» E.

Discussion

9361.	Which one of the following is a hydrophilic colloidal sol
A.	Barium hydroxide sol
B.	Arsenic sulphide sol
C.	Starch solution
D.	Silver chloride sol
Answer» D. Silver chloride sol

Discussion

9362.	Emulsifiers are generally
A.	Soap
B.	Synthetic detergents
C.	Lyophilic sols
D.	All of these
Answer» E.

Discussion

9363.	The disaccharide present in milk is [CPMT 1982, 87, 91; MP PET 2001]
A.	Maltose
B.	Lactose
C.	Sucrose
D.	Cellobiose
Answer» C. Sucrose

Discussion

9364.	If one end of a piece of a metal is heated, the other end becomes hot after some time. This is due to [CBSE PMT 1995]
A.	Energised electrons moving to the other part of the metal
B.	Resistance of the metal
C.	Mobility of atoms in the metal
D.	Minor perturbation in the energy of atoms
Answer» B. Resistance of the metal

Discussion

9365.	In \[Cu-Zn\] cell [BHU 1981]
A.	Reduction occurs at the copper cathode
B.	Oxidation occurs at the copper cathode
C.	Reduction occurs at the anode
D.	Chemical energy is converted to light energy
Answer» B. Oxidation occurs at the copper cathode

Discussion

9366.	If the bond dissociation energies of \[XY,\,{{X}_{2}}\]and \[{{Y}_{2}}\] (all diatomic molecules) are in the ratio of 1 : 1 : 0.5 and \[{{\Delta }_{f}}H\] for the formation of \[XY\] is \[-200\,kJ\,mol{{e}^{-1}}\]. The bond dissociation energy of \[{{X}_{2}}\] will be [AIEEE 2005]
A.	\[100\,kJ\,mo{{l}^{-1}}\]
B.	\[800\,kJ\,mo{{l}^{-1}}\]
C.	\[300\,kJ\,mo{{l}^{-1}}\]
D.	\[400\,kJ\,mo{{l}^{-1}}\]
Answer» C. \[300\,kJ\,mo{{l}^{-1}}\]

Discussion

9367.	Suppose you have to determine the percentage of carbon dioxide in a sample of a gas available in a container. Which is the best absorbing material for the carbon dioxide [Pb. PMT 2001]
A.	Heated copper oxide
B.	Cold, solid calcium chloride
C.	Cold, solid calcium hydroxide
D.	Heated charcoal
Answer» D. Heated charcoal

Discussion

9368.	Which one of the following characteristics is not correct for physical adsorption [AIEEE 2003]
A.	Adsorption on solids is reversible
B.	Adsorption increases with increase in temperature
C.	Adsorption is spontaneous
D.	Both enthalpy and entropy of adsorption are negative
Answer» C. Adsorption is spontaneous

Discussion

9369.	Which is polysaccharide
A.	Starch
B.	Cellulose
C.	Glycogen
D.	All of these
Answer» E.

Discussion

9370.	Soap essentially forms a colloidal solution in water and removes the greasy matter by
A.	Absorption
B.	Emulsification
C.	Coagulation
D.	None of these
Answer» C. Coagulation

Discussion

9371.	An atom has mass number 232 and atomic number 90. How many \[\alpha \]-particles should it emit after emission of two \[\beta \]-particles, so that the new element's atom has mass number 212 and atomic number 82
A.	4
B.	5
C.	6
D.	3
Answer» C. 6

Discussion

9372.	Which of the following s-block elements forms nitride [RPET 2003]
A.	Ba
B.	\[Be\]
C.	\[Ca\]
D.	\[Li\]
Answer» E.

Discussion

9373.	Which decolorize aqueous bromine and gives white fumes of HCl on reaction with \[PC{{l}_{5}}\] [Pb. PMT 1999]
A.	\[C{{H}_{3}}COC{{H}_{2}}CH=C{{H}_{2}}\]
B.	\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\]
C.	\[C{{H}_{3}}CH=CHC{{H}_{2}}C{{H}_{2}}OH\]
D.	\[C{{H}_{3}}OC{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}OH\]
Answer» D. \[C{{H}_{3}}OC{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}OH\]

Discussion

9374.	In Lassaigne?s test the organic compound is fused with Na followed by extraction with distilled water. Which of the following is not the possible product of this fusion reaction [AMU 2002]
A.	NaX
B.	\[NaCN\]
C.	NaNC
D.	\[N{{a}_{2}}S\]
Answer» D. \[N{{a}_{2}}S\]

Discussion

9375.	The Empirical formula of a compound is \[C{{H}_{2}}O\] and its molecular weight is 120. The molecular formula of the compound is [Kerala (Med.) 2003]
A.	\[{{C}_{2}}{{H}_{4}}{{O}_{2}}\]
B.	\[{{C}_{3}}{{H}_{6}}{{O}_{3}}\]
C.	\[{{C}_{4}}{{H}_{8}}{{O}_{4}}\]
D.	\[C{{H}_{2}}O\]
Answer» D. \[C{{H}_{2}}O\]

Discussion

9376.	The specific rotation of equilibrium mixture of a-D-glucose and b-D-glucose, is [MP PMT 2003]
A.	\[+{{19}^{o}}\]
B.	\[+{{112}^{o}}\]
C.	\[+{{52}^{o}}\]
D.	\[+{{100}^{o}}\]
Answer» D. \[+{{100}^{o}}\]

Discussion

9377.	Regarding criteria of catalysis which one of the following statements is not true [CPMT 1990]
A.	The catalyst is unchanged chemically at the end of the reaction
B.	A small quantity of catalyst is often sufficient to bring about a considerable amount of reaction
C.	In a reversible reaction the catalyst alters the equilibrium position
D.	The catalyst accelerates the reaction
Answer» D. The catalyst accelerates the reaction

Discussion

9378.	Light green crystals of ferrous sulphate lose water molecule and turn brown on exposure to air. This is due to its oxidation to
A.	\[F{{e}_{2}}{{O}_{3}}\]
B.	\[F{{e}_{2}}{{O}_{3}}.{{H}_{2}}O\]
C.	\[Fe(OH)S{{O}_{4}}\]
D.	\[F{{e}_{2}}{{O}_{3}}+FeO\]
Answer» D. \[F{{e}_{2}}{{O}_{3}}+FeO\]

Discussion

9379.	Which of the following statement is true for the electrochemical Daniel cell [AIIMS 2004]
A.	Electrons flow from copper electrode to zinc electrode
B.	Current flows from zinc electrode to copper electrode
C.	Cations move toward copper electrode which is cathode
D.	Cations move toward zinc electrode
Answer» D. Cations move toward zinc electrode

Discussion

9380.	Property of the colloidal solution is due to
A.	Nature of dispersed phase
B.	Nature of dispersion medium
C.	Physical state of dispersed phase
D.	Temperature of the system
Answer» D. Temperature of the system

Discussion

9381.	Ethylene reacts with ozone gas to form the compound [UPSEAT 2001]
A.	\[HCHO\]
B.	\[{{C}_{2}}{{H}_{5}}OH\]
C.	\[O\,<\,\begin{matrix} \underset{\|}{\mathop{C}}\,{{H}_{2}}-\underset{\|}{\mathop{O}}\, \\ C{{H}_{2}}-O \\ \end{matrix}\]
D.	\[C{{H}_{3}}CHO\]
Answer» B. \[{{C}_{2}}{{H}_{5}}OH\]

Discussion

9382.	A polymer with the high chemical stability has \[M.P.\,\,{{327}^{o}}C\] and the density of complete crystalline sample is \[2.3\,\,g/c{{m}^{3}}.\] It can be
A.	PVC
B.	Teflon
C.	Melamine
D.	Bakelite
Answer» C. Melamine

Discussion

9383.	The atomic number of an element is 17. The number of orbitals containing electron pairs in its valence shell is [CPMT 2001]
A.	Eight
B.	Six
C.	Three
D.	Two
Answer» D. Two

Discussion

9384.	On heating a mixture of sodium benzoate and sodalime, the following is obtained [CPMT 1990; AIIMS 1996; MP PET 1999; AFMC 1999]
A.	Toluene
B.	Phenol
C.	Benzene
D.	Benzoic acid
Answer» D. Benzoic acid

Discussion

9385.	Catalyst used in dimerisation of acetylene to prepare chloroprene is [BHU 1984]
A.	\[HgS{{O}_{4}}+{{H}_{2}}S{{O}_{4}}\]
B.	\[C{{u}_{2}}C{{l}_{2}}\]
C.	\[C{{u}_{2}}C{{l}_{2}}+N{{H}_{4}}Cl\]
D.	\[C{{u}_{2}}C{{l}_{2}}+N{{H}_{4}}OH\]
Answer» D. \[C{{u}_{2}}C{{l}_{2}}+N{{H}_{4}}OH\]

Discussion

9386.	When disorder of a system increases, the change is said to be
A.	Exothermic
B.	Non-spontaneous
C.	Endothermic
D.	Spontaneous
Answer» E.

Discussion

9387.	Which one of the following is called amphoteric solvent [UPSEAT 2004]
A.	Ammonium hydroxide
B.	Chloroform
C.	Benzene
D.	Water
Answer» E.

Discussion

9388.	Tyndall effect would be observed in a [CPMT 1973, 79, 90, 91, 94; MP PET 1999; MP PMT 1973, 89; DPMT 1982, 83; AFMC 1999]
A.	Solution
B.	Colloidal solution
C.	Precipitate
D.	Solvent
Answer» C. Precipitate

Discussion

9389.	Which of the following is coloured
A.	\[ScC{{l}_{3}}\]
B.	\[Ti{{O}_{2}}\]
C.	\[MnS{{O}_{4}}\]
D.	\[ZnS{{O}_{4}}\]
Answer» D. \[ZnS{{O}_{4}}\]

Discussion

9390.	Surface tension of lyophilic sols is [MP PMT 1992]
A.	Lower than \[{{H}_{2}}O\]
B.	More than \[{{H}_{2}}O\]
C.	Equal to \[{{H}_{2}}O\]
D.	None of these
Answer» B. More than \[{{H}_{2}}O\]

Discussion

9391.	Which of the following is a linear polymer
A.	Nylons
B.	Bakelite
C.	Low density polythene
D.	Melamine-formaldehyde polymer
Answer» B. Bakelite

Discussion

9392.	For the adsorption of a gas on a solid, the plot of log (x/m) versus log P is linear with slope equal to [CBSE PMT 1994]
A.	k
B.	log k
C.	n
D.	1/n
Answer» E.

Discussion

9393.	The monomer of Nylon-6 is/are [DPMT 2004]
A.	\[HO-C{{H}_{2}}-C{{H}_{2}}-OH\]
B.
C.	\[{{F}_{2}}C=C{{F}_{2}}\]
D.	\[{{H}_{2}}C=C{{H}_{2}}\]
Answer» C. \[{{F}_{2}}C=C{{F}_{2}}\]

Discussion

9394.	The equivalent weight of phosphoric acid \[({{H}_{3}}P{{O}_{4}})\] in the reaction \[NaOH+{{H}_{3}}P{{O}_{4}}\to Na{{H}_{2}}P{{O}_{4}}+{{H}_{2}}O\] is [AIIMS 1999]
A.	25
B.	49
C.	59
D.	98
Answer» E.

Discussion

9395.	Which of the following is the strongest base [Roorkee 2000]
A.	\[{{C}_{2}}H_{5}^{-}\]
B.	\[{{C}_{2}}{{H}_{5}}CO{{O}^{-}}\]
C.	\[{{C}_{2}}{{H}_{5}}{{O}^{-}}\]
D.	\[O{{H}^{-}}\]
Answer» B. \[{{C}_{2}}{{H}_{5}}CO{{O}^{-}}\]

Discussion

9396.	Common alum is [DPMT 1982; CPMT 1978; AMU 1982, 83]
A.	\[{{K}_{2}}S{{O}_{4}}.A{{l}_{2}}{{(S{{O}_{4}})}_{3}}.24{{H}_{2}}O\]
B.	\[{{K}_{2}}S{{O}_{4}}.C{{r}_{2}}{{(S{{O}_{4}})}_{3}}.24{{H}_{2}}O\]
C.	\[{{K}_{2}}S{{O}_{4}}.F{{e}_{2}}{{(S{{O}_{4}})}_{3}}.24{{H}_{2}}O\]
D.	\[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}.FeS{{O}_{4}}.6{{H}_{2}}O\]
Answer» B. \[{{K}_{2}}S{{O}_{4}}.C{{r}_{2}}{{(S{{O}_{4}})}_{3}}.24{{H}_{2}}O\]

Discussion

9397.	The aqueous solution of \[AlC{{l}_{3}}\] is acidic due to the hydrolysis of [UPSEAT 2001, 02]
A.	Aluminium ion
B.	Chloride ion
C.	Both aluminium and chloride ion
D.	None of these
Answer» B. Chloride ion

Discussion

9398.	\[C{{l}^{-}}\]is the conjugate base of [NCERT 1979; CPMT 1976; MP PET/PMT 1988]
A.	\[HCl{{O}_{4}}\]
B.	\[1\times {{10}^{-5}},\]
C.	\[C{{H}_{3}}COONa\]
D.	\[HCl{{O}_{3}}\]
Answer» C. \[C{{H}_{3}}COONa\]

Discussion

9399.	An organic compound contains \[C=36%\] \[H=6%\] and rest oxygen. Its Empirical formula is
A.	\[C{{H}_{2}}O\]
B.	\[{{C}_{2}}{{H}_{3}}{{O}_{3}}\]
C.	\[C{{H}_{2}}{{O}_{2}}\]
D.	\[{{C}_{2}}{{H}_{2}}{{O}_{2}}\]
Answer» B. \[{{C}_{2}}{{H}_{3}}{{O}_{3}}\]

Discussion

9400.	Empirical formula of a compound is \[C{{H}_{2}}O\] and its vapour density is 30. Molecular formula of the compound is [MP PMT 1993; AIIMS 1998; CBSE PMT 2000; KCET (Med.) 2000; Pb. PMT 2000]
A.	\[{{C}_{3}}{{H}_{6}}{{O}_{3}}\]
B.	\[{{C}_{2}}{{H}_{4}}{{O}_{2}}\]
C.	\[{{C}_{2}}{{H}_{4}}O\]
D.	\[C{{H}_{2}}O\]
Answer» C. \[{{C}_{2}}{{H}_{4}}O\]

Discussion

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

The IUPAC name of \[C{{H}_{3}}-\overset{Cl\,}{\mathop{\overset{|\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{3}}\] is [Pb. CET 2000]

The IUPAC name of Gamaxene is [MP PET 2004]

In hydrogen spectrum the different lines of Lyman series are present is [UPSEAT 1999]

Which one of the following salt is most acidic in water [IIT 1995]

Colloidal solutions of gold prepared by different methods have different colours owing to [JIPMER 1999]

\[{{H}_{3}}P{{O}_{3}}\] gets hydrolysed giving ....... [Orissa JEE 2002]

Which of the following has smaller size [RPET 2003]

The reactivity of the alkali metal sodium with water, is made use of [MP PMT 1994]

The extent of adsorption of a gas on a solid depends on [KCET 2005]

Review the equilibrium and choose the correct statement \[HCl{{O}_{4}}+{{H}_{2}}O\] ⇄ \[{{H}_{3}}{{O}^{+}}+ClO_{4}^{-}\] [RPMT 2000]

Which one of the following is a hydrophilic colloidal sol

Emulsifiers are generally

The disaccharide present in milk is [CPMT 1982, 87, 91; MP PET 2001]

If one end of a piece of a metal is heated, the other end becomes hot after some time. This is due to [CBSE PMT 1995]

In \[Cu-Zn\] cell [BHU 1981]

If the bond dissociation energies of \[XY,\,{{X}_{2}}\]and \[{{Y}_{2}}\] (all diatomic molecules) are in the ratio of 1 : 1 : 0.5 and \[{{\Delta }_{f}}H\] for the formation of \[XY\] is \[-200\,kJ\,mol{{e}^{-1}}\]. The bond dissociation energy of \[{{X}_{2}}\] will be [AIEEE 2005]

Suppose you have to determine the percentage of carbon dioxide in a sample of a gas available in a container. Which is the best absorbing material for the carbon dioxide [Pb. PMT 2001]

Which one of the following characteristics is not correct for physical adsorption [AIEEE 2003]

Which is polysaccharide

Soap essentially forms a colloidal solution in water and removes the greasy matter by

An atom has mass number 232 and atomic number 90. How many \[\alpha \]-particles should it emit after emission of two \[\beta \]-particles, so that the new element's atom has mass number 212 and atomic number 82

Which of the following s-block elements forms nitride [RPET 2003]

Which decolorize aqueous bromine and gives white fumes of HCl on reaction with \[PC{{l}_{5}}\] [Pb. PMT 1999]

In Lassaigne?s test the organic compound is fused with Na followed by extraction with distilled water. Which of the following is not the possible product of this fusion reaction [AMU 2002]

The Empirical formula of a compound is \[C{{H}_{2}}O\] and its molecular weight is 120. The molecular formula of the compound is [Kerala (Med.) 2003]

The specific rotation of equilibrium mixture of a-D-glucose and b-D-glucose, is [MP PMT 2003]

Regarding criteria of catalysis which one of the following statements is not true [CPMT 1990]

Light green crystals of ferrous sulphate lose water molecule and turn brown on exposure to air. This is due to its oxidation to

Which of the following statement is true for the electrochemical Daniel cell [AIIMS 2004]

Property of the colloidal solution is due to

Ethylene reacts with ozone gas to form the compound [UPSEAT 2001]

A polymer with the high chemical stability has \[M.P.\,\,{{327}^{o}}C\] and the density of complete crystalline sample is \[2.3\,\,g/c{{m}^{3}}.\] It can be

The atomic number of an element is 17. The number of orbitals containing electron pairs in its valence shell is [CPMT 2001]

On heating a mixture of sodium benzoate and sodalime, the following is obtained [CPMT 1990; AIIMS 1996; MP PET 1999; AFMC 1999]

Catalyst used in dimerisation of acetylene to prepare chloroprene is [BHU 1984]

When disorder of a system increases, the change is said to be

Which one of the following is called amphoteric solvent [UPSEAT 2004]

Tyndall effect would be observed in a [CPMT 1973, 79, 90, 91, 94; MP PET 1999; MP PMT 1973, 89; DPMT 1982, 83; AFMC 1999]

Which of the following is coloured

Surface tension of lyophilic sols is [MP PMT 1992]

Which of the following is a linear polymer

For the adsorption of a gas on a solid, the plot of log (x/m) versus log P is linear with slope equal to [CBSE PMT 1994]

The monomer of Nylon-6 is/are [DPMT 2004]

The equivalent weight of phosphoric acid \[({{H}_{3}}P{{O}_{4}})\] in the reaction \[NaOH+{{H}_{3}}P{{O}_{4}}\to Na{{H}_{2}}P{{O}_{4}}+{{H}_{2}}O\] is [AIIMS 1999]

Which of the following is the strongest base [Roorkee 2000]

Common alum is [DPMT 1982; CPMT 1978; AMU 1982, 83]

The aqueous solution of \[AlC{{l}_{3}}\] is acidic due to the hydrolysis of [UPSEAT 2001, 02]

\[C{{l}^{-}}\]is the conjugate base of [NCERT 1979; CPMT 1976; MP PET/PMT 1988]

An organic compound contains \[C=36%\] \[H=6%\] and rest oxygen. Its Empirical formula is

Empirical formula of a compound is \[C{{H}_{2}}O\] and its vapour density is 30. Molecular formula of the compound is [MP PMT 1993; AIIMS 1998; CBSE PMT 2000; KCET (Med.) 2000; Pb. PMT 2000]