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Test: Chemistry - 9


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Test: Chemistry - 9 - Question 1

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

Test: Chemistry - 9 - Question 2

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

Test: Chemistry - 9 - 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

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

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

Test: Chemistry - 9 - Question 10
If the enthalpy of vaporization of water is 186.5 J the entropy of its vaporization will be
Test: Chemistry - 9 - Question 11
The entropy change for a phase transformation is
Test: Chemistry - 9 - 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
Test: Chemistry - 9 - 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
Test: Chemistry - 9 - Question 14

In which of the following reactions is ?

Test: Chemistry - 9 - 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?

Test: Chemistry - 9 - Question 16
When is heated in a closed vessel, gas is liberated and is left behind At equilibrium
Test: Chemistry - 9 - Question 17

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

Test: Chemistry - 9 - Question 18
Which of the following is the correct representation of the solubility product constant for
Test: Chemistry - 9 - Question 19
When equal volumes of the following solutions are mixed, the precipitation of AgCl will occur only with (given of AgCl =
Test: Chemistry - 9 - Question 20
For a weak monoprotic acid, the pH of a given concentration is calculated by the equation
Test: Chemistry - 9 - Question 21
Hydrogen has the tendency to gain one electron to acquire helium configuration, in this respect it
resembles
Test: Chemistry - 9 - Question 22
Which of the following is not a water softener?
Test: Chemistry - 9 - Question 23
A commercial sample of can be slowed down by the addition of small amount of phosphoric acid which acts as
Test: Chemistry - 9 - Question 24
The IUPAC name of is
Test: Chemistry - 9 - Question 25

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

Test: Chemistry - 9 - Question 26
The total number of isomers having the molecular formula is
Test: Chemistry - 9 - Question 27
The compound which is not isomeric with diethyl ether is
Test: Chemistry - 9 - Question 28
Which of the following exhibits tautomerism?
Test: Chemistry - 9 - Question 29
Which of the following compounds will not show cistrans isomerism?
Test: Chemistry - 9 - Question 30
Homolytic fission of carbon-carbon bond of ethane produces an intermediate in which the carbon atom is in
Test: Chemistry - 9 - Question 31
In the bond that undergoes heterolytic cleavage most readily is
Test: Chemistry - 9 - Question 32
Which of the following reaction intermediates contains three pairs of electrons in the valence shell of the reactive carbon?
Test: Chemistry - 9 - Question 33
Which of the following regents will not convert ethyl alcohol into ethyl chloride?
Test: Chemistry - 9 - Question 34
The reaction produces mainly
Test: Chemistry - 9 - Question 35
1, 3-Dibromopropane reacts with metallic zinc to form
Test: Chemistry - 9 - Question 36
Molecular formula of Glauber’s salt is
Test: Chemistry - 9 - Question 37
Which alkene on ozonolysis gives and  ?
Test: Chemistry - 9 - Question 38
Reaction of HBr with propene in the presence of peroxide gives
Test: Chemistry - 9 - Question 39
3-Phenylpropene on reaction with HBr gives (as major product)
Test: Chemistry - 9 - Question 40
Which of the following reactions will yield 2, 2-dibromopropane?
Test: Chemistry - 9 - Question 41
In the reaction below, X is
Test: Chemistry - 9 - Question 42
Which salt on heating does not give brown coloured gas?
Test: Chemistry - 9 - Question 43
Plaster of Paris is
Test: Chemistry - 9 - Question 44
The right order of the solubility of sulphates of alkaline earth metals is
Test: Chemistry - 9 - Question 45
Which of the following gives propyne on hydrolysis?
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