Chemistry Topic-Wise Test - 9


45 Questions MCQ Test NEET Mock Test Series & Past Year Papers | Chemistry Topic-Wise Test - 9


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QUESTION: 1

The radius of the hydrogen atom in the ground state is .The radius of in the similar state is

Solution:
QUESTION: 2

The amount of energy needed to excite a hydrogen atom from its ground state to the second excited
state is

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QUESTION: 3

For a neutral unexcited atom, consider four electrons identified by the quantum number n and l :
(i) n = 4, l = 1 (ii) n = 4, l = 0
(iii) n = 3, l = 2 (iv) n = 3, l = 1 They can be placed in order of increasing energy as

Solution:
QUESTION: 4
Which of the following pairs will combine through a coordinate bond?
Solution:
QUESTION: 5
The total number of covalent bonds present in the ion is
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QUESTION: 6
The number of electrons in is
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QUESTION: 7
A square planar complex is formed by the hybridization of
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QUESTION: 8
The density of a gas will be the highest at
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QUESTION: 9

The hydrated salt Na2CO3 x H2O undergoes 63 % loss in mass on heating and become anhydrous. The value of x is:

Solution:
QUESTION: 10
If the enthalpy of vaporization of water is 186.5 J the entropy of its vaporization will be
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QUESTION: 11
The entropy change for a phase transformation is
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QUESTION: 12
The standard molar enthalpies of formation of ethane(g), (g), O(I) are –21.1 kacl, –94.1
kcal and –68.3 kcal respectively. The standard molar enthalpy of combustion of ethane will be
Solution:
QUESTION: 13
If at 298 K the bond energies of C–H, C–C, C=C and H–H bonds are 414 kJ ,347 kJ ,
615 kJ and 435 kJ  respectively, the value of enthalpy change for the reaction
at 298 K will be
Solution:
QUESTION: 14

In which of the following reactions is ?

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QUESTION: 15

When 1 mole of ethanol is mixed with 1 mole of acetic acid, 0.67 mole of ethyl acetate is produced at equilibrium. Calculate for the reaction?

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QUESTION: 16
When is heated in a closed vessel, gas is liberated and is left behind At equilibrium
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QUESTION: 17

The degree of dissociation of 0.1 M  CH3CO2H is (given  Ka ≈ 1.0 x 10-5)

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QUESTION: 18
Which of the following is the correct representation of the solubility product constant for
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QUESTION: 19
When equal volumes of the following solutions are mixed, the precipitation of AgCl will occur only with (given of AgCl =
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QUESTION: 20
For a weak monoprotic acid, the pH of a given concentration is calculated by the equation
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QUESTION: 21
Hydrogen has the tendency to gain one electron to acquire helium configuration, in this respect it
resembles
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QUESTION: 22
Which of the following is not a water softener?
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QUESTION: 23
A commercial sample of can be slowed down by the addition of small amount of phosphoric acid which acts as
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QUESTION: 24
The IUPAC name of is
Solution:
QUESTION: 25

The IUPAC name of  CH3-CH(OH)-CH2-CH(CH)3-CH2-CH3 is

Solution:
QUESTION: 26
The total number of isomers having the molecular formula is
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QUESTION: 27
The compound which is not isomeric with diethyl ether is
Solution:
QUESTION: 28
Which of the following exhibits tautomerism?
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QUESTION: 29
Which of the following compounds will not show cistrans isomerism?
Solution:
QUESTION: 30
Homolytic fission of carbon-carbon bond of ethane produces an intermediate in which the carbon atom is in
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QUESTION: 31
In the bond that undergoes heterolytic cleavage most readily is
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QUESTION: 32
Which of the following reaction intermediates contains three pairs of electrons in the valence shell of the reactive carbon?
Solution:
QUESTION: 33
Which of the following regents will not convert ethyl alcohol into ethyl chloride?
Solution:
QUESTION: 34
The reaction produces mainly
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QUESTION: 35
1, 3-Dibromopropane reacts with metallic zinc to form
Solution:
QUESTION: 36
Molecular formula of Glauber’s salt is
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QUESTION: 37
Which alkene on ozonolysis gives and  ?
Solution:
QUESTION: 38
Reaction of HBr with propene in the presence of peroxide gives
Solution:
QUESTION: 39
3-Phenylpropene on reaction with HBr gives (as major product)
Solution:
QUESTION: 40
Which of the following reactions will yield 2, 2-dibromopropane?
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QUESTION: 41
In the reaction below, X is
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QUESTION: 42
Which salt on heating does not give brown coloured gas?
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QUESTION: 43
Plaster of Paris is
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QUESTION: 44
The right order of the solubility of sulphates of alkaline earth metals is
Solution:
QUESTION: 45
Which of the following gives propyne on hydrolysis?
Solution:

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