Free Printable VST -1

1.

The average kinetic energy of an ideal gas per molecule in SI units at $25\degree C$ will be

a)

$6.17\times10^{-21}$ KJ

b)

$6.17\times10^{-21}$ J

c)

$6.17\times10^{-20}$ J

d)

$7.16\times10^{-20}$ J

2.

An ion which has 18 electrons in the outermost shell is

a)

$Cu^+$

b)

$Th^{4+}$

c)

$Cs^+$

d)

$K^+$

3.

Which of the following is not paramagnetic ?

a)

NO

b)

$S^{-2}$

c)

$O^{-2}$

d)

$N^{-2}$

4.

The charge required to deposit 11.5 g. of sodium from fused sodium chloride is

a)

0.5 Faraday

b)

1.0 Faraday

c)

1.5 Faraday

d)

96500 coulombs

5.

The total number of valence electrons in 4.2 g of N^3- ion are

a)

2.2 N

b)

2.4 N

c)

1.6 N

d)

3.2 N

6.

An oxide of a metal (M) contains 40% by mass of oxygen. Metal (M) has atomic mass of 24. The empirical formula of the oxide is

a)

M₂O

b)

MO

c)

M₂O₃

d)

M₃O₄

7.

The oxidation state of I in H₄I O₆^– is

a)

+ 7

b)

–1

c)

+ 5

d)

+1

8.

For the cell reaction,
$Cu^{2+}\left(C_2aq\right)+Zn\left(s\right)\rightarrow Zn^{2+}\left(C_1aq\right)+Cu\left(s\right)$
the change in free energy ( $\Delta G$ ) at a given temperature is a function of

a)

In $C_1$

b)

In $\frac{C_2}{C_1}$

c)

In $C_{1+}C_2$

d)

In $C_2$

9.

The standard reduction potentials at 25⁰C of Li+|Li Ba²⁺|Ba, Na⁺|Na and Mg²⁺|Mg are –3.05, –2.73, –2.71 and –2.37V respectively. Which is strongest reducing agent ?

a)

Li

b)

Ba

c)

Na

d)

Mg

10.

The relationship between osmotic pressure at 273 K when 10 g glucose (P₁), 10 g urea (P₂) and 10 g sucrose (P₃) are dissolved in 250 ml of water is

a)

P₁ > P₂ > P₃

b)

P₃ > P₁> P₂

c)

P₂ > P₁ > P₃

d)

P₂> P₃ > P₁

11.

For adsorption of gas on solid surface, the plot of log(x/m) vs log P is linear with a slope equal to

a)

K

b)

log K

c)

In K

d)

1/n(n being integer)

12.

At CMC, the surfactant molecules undergo

a)

Association

b)

Aggregation

c)

Micelle formation

d)

All of these

13.

The given reaction $2FeCl_3+SnCl_2\rightarrow SnCl_4+2FeCl_2$
is an example of

a)

First order reaction

b)

Third order reaction

c)

Second order reaction

d)

None of these

14.

For reaction
$PCl_3\left(g\right)+Cl_2\left(g\right)\rightarrow PCl_5\left(g\right)$ the value of $K_c$ at $25\degree C$ is 26 $mol^{-1}$ litre. The value of $K_p$ at this temperature will be

a)

0.61 $atm^{-1}$

b)

0.57 $atm^{-1}$

c)

0.83 $atm^{-1}$

d)

0.46 $atm^{-1}$

15.

K_sp of CuS, Ag₂S and HgS are 10^–31, 10^–44 and 10^–54respectively. Select the correct order for their solubility in water.

a)

Ag₂S > HgS > CuS

b)

HgS > CuS > Ag₂S

c)

HgS > Ag₂S > CuS

d)

Ag₂S > CuS > HgS

16.

Identify the correct statement regarding entropy.

a)

At absolute zero of temperature, the entropy of perfectly crystalline substance is +ve

b)

At absolute zero of temperature entropy of perfectly crystalline substance is taken to be zero.

c)

At 0⁰C the entropy of a perfectly crystalline substance is taken to be zero.

d)

At absolute zero of temperature, the entropy of all crystalline substances is taken to be zero.

17.

Latent heat of vaporisation of a liquid at 500 K and 1 atm pressure is 10.0 kcal/mol. What will be the change in internal energy $\left(\Delta E\right)$ of 3 mole of liquid at same temperature ?

a)

13.0 kcal

b)

–13.0 kcal

c)

27.0 kcal

d)

–27.0 kcal

18.

The intermetallic compound LiAg crystallises in cubic lattice in which both Li and Ag have co-ordination number of eight. The class of crystal is

a)

Simple cubic

b)

Body centred cubic

c)

Face centered cubic

d)

None of these

19.

One would expect proton to have very large

a)

Ionisation potential

b)

Radius

c)

Charge

d)

Hydration energy

20.

The pair that yields the same gaseous product on reaction with water is

a)

K and K₂O

b)

Ca and CaH₂

c)

Na and Na₂O₂

d)

Ba and BaO₂

21.

Which of the following statements is false regarding saline hydrides ?

a)

In the molten state they conduct electricity

b)

They dissolve in water giving off hydrogen

c)

They are used as reducing agents

d)

They are covalent in nature

22.

The first ionisation energies of alkaline earth metals are higher than those of the alkali metals. This is because

a)

There is increase in the nuclear charge of the alkaline earth metals

b)

There is decrease in the nuclear charge of the alkaline earth metals

c)

There is no change in the nuclear charge

d)

None of the above

23.

Which of the following is not Lewis acid ?

a)

SiF₄

b)

FeCl₃

c)

BF₃

d)

C₂H₄

24.

The structure and hybridisation of Si(CH₃)₄ is

a)

Bent, sp

b)

Trigonal, sp²

c)

Octahedral, sp³d

d)

Tetrahedral, sp³

25.

$PH_4I+NaOH$ forms

a)

$PH_3$

b)

$NH_3$

c)

$P_4O_6$

d)

$P_4O_{10}$

26.

Which one has the highest bond energy ?

a)

O – O

b)

S – S

c)

Se – Se

d)

Te – Te

27.

Which element is extracted commercially by the electrolysis of an aqueous solution of one of its compounds ?

a)

Sodium

b)

Aluminium

c)

Chlorine

d)

Bromine

28.

The 3d-transition series contains elements from atomic number

a)

22 to 30

b)

21 to 30

c)

21 to 31

d)

21 to 29

29.

Which one of the following elements constitues a major impurity in pig iron ?

a)

silicon

b)

oxygen

c)

sulphur

d)

Carbon

30.

Which complex is likely to show optical activity ?

a)

trans-[Co(NH₃)₄Cl₂]⁺

b)

[Cr(H₂O)₆]³⁺

c)

cis-[Co(NH₃)₂(en)₂]³⁺

d)

trans-[Co(NH₃)₂(en)₂]³⁺

31.

The formula of dichlorobis (urea) copper (II) is

a)

[Cu(O = C(CNH₂)₂] Cl₂

b)

[CuCl₂ {O = C(NH₂)₂}]

c)

Cu{O = C(NH₂)₂}Cl]Cl

d)

[CuCl₂][O = C(NH₂)₂]H₂

32.

Which of the following IUPAC name is correct ?

a)

2-methyl-3-ethylpentane

b)

2-ethyl-3-methylpentane

c)

3-ethyl-2-methylpentane

d)

3-methyl-2-ethylpentane

33.

The restricted rotation about carbon-carbon double bond in 2-butene is due to overlap of

a)

two p orbitals

b)

one p and one sp² - hybridised orbitals

c)

two sp²-hybridised orbitals

d)

one s and one sp²-hybridised orbitals

34.

Lassaigne's test for the detection of nitrogen will fail in case of

a)

NH₂CONH₂

b)

H₂NCONHNH₂.HCl

c)

H₂N.NH₂.2HCl

d)

C₆H₅NHNH₂.2HCl

35.

An organic compound containing C, H and N have the percentage 40, 13.33 and 46.67 respectively. Its empirical formula may be

a)

C₂H₇N

b)

C₂H₇N₂

c)

CH₄N

d)

CH₅N

36.

When HCl gas is passed through propene in the presence of benzoyl peroxide, it gives

a)

n-propyl chloride

b)

2-chloropropane

c)

Allyl chloride

d)

No reaction

37.

Addition of O₂on ethylene in presence of Ag at 200⁰C forms

a)

Epoxy ethane

b)

Oxiranes

c)

Cyclic ethers

d)

All of these

38.

2-bromopentane is heated with potassium ethoxide in ethanol. The major product is

a)

Trans-pent-2-ene

b)

2-ethoxy pentane

c)

Pent-1-ene

d)

Cis-pent-2-ene

39.

The boiling point of ethyl alcohol is much higher than that of dimethyl ether and C₂H₅SH, though both have the same molecular weight. The reason for this is

a)

Ether is insoluble in water

b)

Methyl groups are attached to oxygen in ether

c)

Dipole moment of ethyl alcohol is less

d)

Ethyl alcohol shows hydrogen bonding

40.

The compound which does not react with sodium is

a)

CH₃CHOHCH₃

b)

CH₃ – O – CH₃

c)

CH₃COOH

d)

C₂H₅OH

41.

Keotnes can be obtained in one step by

a)

Hydrolysis of ester

b)

Oxidation of primary alcohols

c)

Reaction of acid halide with alcohols

d)

Oxidation of secondary alcohol

42.

Diazo-coupling is useful to prepare

a)

Pesticides

b)

Dyes

c)

Proteins

d)

Vitamins

43.

RCH₂CH₂OH can be converted into RCH₂CH₂COOH by the following sequence of steps.

a)

PBr₃, KCN, H₃O⁺

b)

PBr₃, KCN, H₂/Pt

c)

KCN, H₃O⁺

d)

HCN, PBr₃, H₃O⁺

44.

An organic compound with molecular formula C₇H₈O dissolves in NaOH and gives characteristic colour with FeCl₃. On treatment with Br₂ it gives tribromo product C₇H₅OBr₃. The compound is

a)

p- hydroxy benzene

b)

2- methoxy -2- phenyl propane

c)

m-cresol

d)

p - cresol

45.

Which of the following is used to make nonstick cook wares ?

a)

polystyrene

b)

polytetrafluoroethylene

c)

polyethylene

d)

Nylon-2,6

VST -1

Total questions: 45

Worksheet time: 38mins

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