Q.1.
The volume occupied by 4.4g of CO2 as STP is ... [ AFMC 1997]
-
19%
a) 22.4L
-
64%
b) 2.24L
-
17%
c) 0.224L
-
0%
d) 0.1L
Q.2.
In order to prepare one litre normal solution of KMnO4, how many grams of KMnO4 are required if the solution is to be used in acidic medium for oxidation? [ MP PET 2002]
-
32%
a) 158g
-
32%
b) 31.6g
-
35%
c) 62.0g
-
0%
d) 790g
Q.3.
Which one of the followings has maximum number of atoms ? [NEET 2018]
-
4%
a) 1 g of O2(g) [Atomic mass of O = 16]
-
59%
b) 1 g of Li(s) [Atomic mass of Li = 7]
-
33%
c) 1 g of Ag(s) [Atomic mass of Ag = 108]
-
4%
d) 1 g of Mg(s) [Atomic mass of Mg = 24]
Q.4.
100ml of PH3 when decompsed produces phosphorus and hydrogen. The change in volume is .... [ CPMT 1986]
-
57%
a) 50 ml increase
-
18%
b) 500 ml decrease
-
14%
c) 900 ml decrease
-
11%
d) nil
Q.5.
Which of the following has smallest number of molecules? [ CPMT 1987]
-
48%
a) 0.1 mol of CO2 gas
-
14%
b) 11.2 L of CO2 gas at N.T.P.
-
10%
c) 22 g of CO2 gas
-
29%
d) 22.4×103 ml of CO2 gas
Q.6.
At S.T.P. the density of CCl4 vapour in g/L will be nearest to .. [ CBSE PMT 1988]
-
47%
a) 6.84
-
26%
b) 3.42
-
21%
c) 10.26
-
5%
d) 4.57
Q.7.
One litre hard water contains 12.00mg Mg2+ Milli-equivalents of washing soda required to remove its hardness is ... [ CBSE PMT 1988]
-
60%
a) 1
-
13%
b) 12.16
-
20%
c) 1×10-3
-
7%
d) 12.16×10-3
Q.8.
Which property of an element is always a whole number? [ MP PMT 1986]
-
21%
a) Atomic weight
-
14%
b) Equivalent weight
-
50%
c) Atomic number
-
14%
d) Atomic volume
Q.9.
Two samples of lead oxide were separately reduced to metallic lead by heating in a current of hydrogen. The weight of lead from one oxide was half the weight of lead obtained from the other oxide. The data illustrates.. [ AMU 1983]
-
8%
a) law of reciprocal proportions
-
42%
b) law of constant proportions
-
17%
c) law of multiple proportions
-
33%
d) law of equivalent proportions
Q.10.
The percentage of copper and oxygen in samples of CuO obtained by different methods were found to be the same. This illustrates the law of ... [ AMU 1982]
-
47%
a) constant proportions
-
7%
b) conservation of mass
-
27%
c) multiple proportions
-
20%
d) reciprocal proportions
Q.11.
What quantity of lime stone ( CaCO3) on heating will give 56kg of CaO? [ DPMT 1981]
-
25%
a) 1000 kg
-
12%
b) 56 kg
-
6%
c) 44 kg
-
56%
d) 100 kg
Q.12.
If two compounds have the same empirical formula but different molecular formulae, they must have .. [ MP PMT 1986]
-
33%
a) different percentage composition
-
53%
b) different molecular weights
-
0%
c) same viscosity
-
13%
d) same vapour density
Q.13.
1.520 g of the hydroxide of metal on ignition gave 0.995g of oxide. The equivalent weight of metal is ... [ DPMT 1984]
-
25%
a) 1.520
-
33%
b) 0.995
-
17%
c) 19.0
-
25%
d) 9.0
Q.14.
Rearrange the following ( I to IV ) in the order of increasing masses and choose the correct answer from (a), (b), (c) and (d) ( Atomic mass: N=14, O=16, Cu=63)I. 1 molecule of oxygenII. 1 atom of nitrogenIII. 1×10-10 g molecular weight of oxygenIV. 1×10-10 g atomic weight of copper[ IIT 1993]
-
46%
a) II < I < III < IV
-
23%
b) IV < III < II < I
-
8%
c) II < III < I < IV
-
23%
d) III < IV < I < II
Q.15.
The percentage of P2O5 in diammonium hydrogen phosphate, (NH4)2HPO4 is .... [ CPMT 1992]
-
12%
a) 23.48
-
25%
b) 46.96
-
56%
c) 53.78
-
6%
d) 71.00
Q.16.
A molal solution is one that contains 1 mole of a solute in .. [ MP PMT 1999]
-
33%
a) 1000g of solvent
-
33%
b) one litre of solvent
-
8%
c) one litre of the solution
-
25%
d) 22.4 litre of the solution
Q.17.
Irrespective of source, pure sample of water always yield 88.89% mass of oxygen and 11.11% mass of hydrogen. This is explained by the law of ... [ kerala CEE 2002]
-
31%
a) conservation of mass
-
23%
b) constant composition
-
8%
c) multiple proportions
-
38%
d) constant proportion
Q.18.
Among FeSO4.7H2O (A), CuSO4.5H2O (B), ZnSO4.7H2O (C), MnSO4.4H2O (D), isomorphous salts are ... [ DPMT 2003]
-
46%
a) A and C
-
38%
b) A and D
-
15%
c) C and B
-
0%
d) A anad B
Q.19.
One mole of calcium phosphide on reaction with excess of water gives .. [ IIT 1999]
-
27%
a) one mole of phosphine
-
27%
b) two moles of phosphoric acid
-
18%
c) two moles of phosphine
-
27%
d) one mole of phosphrous pentoxide
Explanation
Q.20.
Which of the following contains maximum number of atoms? [ JIPMER 2000]
-
46%
a) 6.023×1021 molecules of CO2
-
38%
b) 22.4 L of CO2 at STP
-
0%
c) 0.44g of CO2
-
15%
d) none of these