Q 1.
The smallest matter particle that can take part in chemical reaction is:
(a) atom
(b) molecule
(c) both
(d) none
Q 2.
Matter is anything which occupies
A and
.......... ...
B
.......... ...
has Here A and Bare:
(a) density and mass (b) volume and mass (c) space and mass
(d) none of these
Q 3.
The solid like conducting state of gases with free electrons is called:
(a) sol state
(b) gel state
(c) plasma state
(d) all of these
Q 4.
An example of homogeneous mixture is:
(a) mixture of soil and water
(c) sugar solution
(b) mixture of salt and sand grains
(d) none of the above
The density of water is equal to:
(a) 10-3 kg/m3
(b) 10 kg/m3
(c) 103 kg/m3
Q 5.
Q 6.
Q 7.
(d) 106 kg/m3
Which one of the following is not the unit of time ?
(a) parallactic second (b) solar day
(c) lunar month
(d) leap year
0.003924 have …………. significant figures.
(a) 6
(b) 4
(c) 3
(d) 7
Q 8.
In multiplication and division the significant figures of answer must be same as that in
the quantity with …………… no. of significant figures.
(a) maximum
(b) 3
(c) 2
(d) minimum
Q 9.
The answer of the calculation
(a) 3.579
2.568  5.8
in significant figures will be:
4.168
(b) 3.570
(c) 3.57
(d) 3.6
Q 10. How many significant figures are there in (respectively)?
(1) 73.000 g (2) 0.0503 g and (3) 2.001 sec.
(a) 3, 3, 4
(b) 3, 4, 5
(c) 2, 5, 4
(d) 5, 3, 4 11
Q 11. The sample with largest number of atoms is :
(a) 1 g of O2(g)
(b) 1 g of Ni (s)
(c) 1 g of B(s)
(d) 1 g of N2 (g)
Q 12.
A sample of ammonium phosphate (NH4)3 PO4 contains 6.36 mol of hydrogen atoms.
The number of moles of oxygen atom in the sample is:
(atomic mass of N = 14.04, H =1, P = 31, 0=16)
(a) 0.265
(b) 0.795
(c) 2.12
(d) 4.14
Q 13. A sample of copper sulphate pentahydrate contains 8.64 g of oxygen. How many g of Cu
present in this sample ? (Atomic mass : Cu = 63.6, S = 32.06, O = 16)
(a) 0.952 g
(b) 3.809 g
(c) 3.782 g
(d) 8.64 g
Q 14. What volume of hydrogen gas, at 273 K and 1 atm? Pressure will be consumed in
obtaining 21.6 g of elemental boron (atomic mass = 10.8) from the reduction of BCl3 by
hydrogen:
(a) 22.4 L
(b) 89.6 L
(c) 67.2 L
(d) 44.8 L
Q 15. Cortisone is a molecular substance containing 21 atoms of carbon per molecule. The
molecular weight of cortisone is 360.4. What is the percentage of carbon in cortisone?
(a) 59.9%
(b) 75%
(c) 69.98%
(d) None of these
Q 16. How many moles of MgIn2S4 can be made from 1 g each of Mg, In and S ?
(atomic mass : Mg = 24, In = 114.8, S = 32)
(a) 6.47 × 10
(b) 3.0×10-1
(c) 9.17×10-2
(d) 8.7×10-3
Q 17. The number of atoms present in a 0.635 g of Cu piece will be:
(a) 6.023 × 10-23
(b) 6.023 × 1023
(c) 6.023 × 1022
(d) 6.023 × 1021
Q 18. Calculate the number of moles left after removing 1021 molecules from 200 mg of CO2 :
(a) 0.00454
(b) 0.00166
(c) 2.88 × 10-3
(d) none of these
Q 19. Volume occupied by 1 mole of a diatomic gas at NTP will be:
(a) 67.2 L
(b) 22.4 L
(c) 11.2 L
(d) none of these
Q 20. The number of sulphate ions in 1000 mL of 0.001 M H2SO4 is:
(a) 6.023 × 1023
(b) 6.023 × 1022
(c) 6.023 × 1021
(d) 6.023 ×1020
Q 21. The molecular weight of air will be: (the components of air given as N2-78% Or – 21%,
Ar - 0.9% and CO2 – 0.1%)
(a) 18.64
(b) 24.968
(c) 28.964
(d) 29.864
Q 22. Number of atoms in 560 g of Fe is:
(given atomic mass of Fe = 56 g/mol)
(a) twice that of 70 g nitrogen
(c) both are correct
(b) half that of 20 g hydrogen
(d) none is correct
Q 23. In an experiment equal weights of iron and sulphur (1.00 g) are heated together and react
to form FeS. What fraction of original weight is left unreacted? (Fe = 55.85 g/mol; S =
32.10 g/mol)
(a) 0.250
(b) 0.579
(c) 8.75 × 10-1
(d) 4.25 × 10-1
Q 24. 30 mL of a gaseous hydrocarbon requires 90 mL of O2 for complete combustion and 60
mL of CO2 is formed in the process. The molecular formula of hydrocarbon will be:
(a) C2H2
(b) CH4
(c) C2H4
(d) C2H6
Q 25. A sample of a mixture of CaCl2 and NaCI weighing 4.22 g was treated to precipitate all
the Ca as CaCO3. This CaCO3 is then heated and quantitatively converted into 0.959 g of
CaO. Calculate the percentage of CaCl2 in the mixture:
(Atomic mass of Ca=40,O=16, C=12, and Cl=35.5)
(a) 31.5%
(b) 21.5%
(c) 45.04%
(d) 68.48%
Q 26. About a gaseous reaction xX + yY  lL + mM Which statement is wrong ?
(a) x litre of X combines with y litre of Y to give L and M
(b) x mole of X combines with y moles of Y to give L and M
(c) x number of molecules of X combine with y number of molecules of Y to form L and
M
(d) x g of X combines with y g of Y to gives M and L
Q 27. For the reaction X + 2Y  Z 5 moles of X and 9 moles of Y will produce:
(a) 5 moles of Z
(b) 8 moles of Z
(c) 14 moles of Z
(d) 4 moles of Z
Q 28. A metal oxide is reduced by heating it in a stream of hydrogen. It is found that after
complete reduction, 3.15 g of oxide yielded 1.05 g of metal. From the above data we can
say that:
(a) the atomic weight of metal is 8
(b) the atomic weight of metal is 4
(c) the equivalent weight of metal is 4
(d) the equivalent weight of metal is 8
Q 29. Two elements X (at. wt. 75) and Y (at. wt. 16) combine to give a compound having 75.8% of X. The formula of compound will be:
(a) XY
(b) X2Y
(c) XY3
(d) X2Y3
Q 30. If 0.5 mole of BaCl2 is mixed with 02 mole of Na3PO4 The maximum number of moles of
Ba3(PO4)2
that can be formed is:
(a) 0.7
(b) 0.5
(c) 0.03
(d) 0.10
Q 31. Which of the following pairs contain equal number of atoms?
(a) 11.2 cc (STP) of nitrogen and 0.015 g of nitric oxide
(b) 22.4 litre (STP) of nitrous oxide and 22.4 litres of nitric oxide
(c) 1 milhimole of HC1 and 0.5 millimole of H2S
(d). 1 mole of H2O2 and 1 mole of N2O4
Q 32. The haemoglobin from RBCs of mammals contains 0.33% of iron by weight. The
physical measurements indicate the mol. wt, of haemoglobin is 7000. The no. of iron
atoms in each molecule of haemoglobin is: (atomic weight of Fe = 56)
(a) 2
(b) 3
(c) 4
(d) 5
Q 33. Cyclohexanol is dehydrated to cyclohexene on heating with conc. H2SO4 The
cyclohexene obtained from 100 g cyclohexanol will be: (if yield of reaction is 375%)
(a) 61.5 g
(b) 75.0 g
(c) 20.0 g
(d) 41.0 g
Q 34. The ratio of volumes of H2 evolved if same amount of Zn to treated with excess of H2SO4
and NaOH separately :
(a) 1:2
(b) 2:1
(c) 1:1
(d) 9:4
Q 35. The composition of residual mixture will be if 30 g of Mg combines with 30 g of oxygen:
(a) 40g MgO + 20g O2
(b) 45g MgO + 15g O2
(c) 50g MgO + 10g O2
(d) 60g MgO only
Answers
1.
8.
15.
22.
29.
a
d
c
c
d
2.
9.
16.
23.
30.
c
d
c
d
d
3.
10.
17.
24.
31.
c
d
d
c
a
4.
11.
18.
25.
32.
c
b
b
c
c
5.
12.
19.
26.
33.
c
c
c
d
a
6.
13.
20.
27.
34.
a
c
d
d
c
7.
14.
21
28
35.
b
c
c
c
c
5.
12.
c
c
6.
13.
a
c
7.
b
Answers
1.
8.
a
d
2.
9.
c
d
3.
10.
c
d
4.
11.
c
b