Assuming fully decomposed, the volume of CO2 released at STP on heating 9.85g of BaCO3 ( Atomic mass, Ba=137 ) will be... [ CBSE PMT 2000]
0%
a) 0.84L
60%
b) 2.24L
10%
c) 4.06L
30%
d) 1.12L
Q.2.
A mixture of sand and iodine can be separated by .. . [ kerala CEE 2002]
9%
a) crystallisation
55%
b) submilation
36%
c) distillation
0%
d) fraction
Q.3.
Among the following pairs of compounds, the one that illustrates the law of multiple proportion is .. [ kerala MEE 2001]
20%
a) NH3 and NCl3
30%
b) H2S and SO2
40%
c) CuO and Cu2O
10%
d) CS2 and FeSO4
Q.4.
A 100 ml solution of 0.1N HCl was titrated with 0.2N NaOH solution. The titration was discontinued after adding 30ml of NaOH solution. The remaining titration was completed by adding 0.25N KOH solution. The volume of KOH required for completing the titration is ... [ DCE 1999]
29%
a) 70ml
29%
b) 32ml
43%
c) 35ml
0%
d) 16ml
Q.5.
A compound contains atoms of three elements in A,B and C. If oxidation number of A is +2, B is +5 and that of C is -2, the possible formula of the compound is
18%
a) A3(BC4)2
55%
b) A3(B4C)2
18%
c)ABC2
9%
d) A2(BC3)2
Q.6.
7.5g of gas occupy 5.6 litre of volume at STP. The gas is ... [ EAMCET 2001]
22%
a) NO
22%
b) N2O
33%
c) CO
22%
d) CO2
Q.7.
For preparing 0.1N solution of a compound from its impure sample of which the percentage purity is known, the weight of the substance required will be ... [ MP PET 1996]
38%
a) more than the theoretical weight
50%
b) less than the theoretical weight
0%
c) same as the theoretical weight
12%
d) none of the above
Q.8.
10 dm3 of N2 gas and 10 dm3 of gas X at the same temperature contain the same number of molecules. The gas is ... [ KCET 2001]
33%
a) CO
56%
b) CO2
0%
c) H2
11%
d) NO
Q.9.
The simple formula of compound containing 50% of element X ( atomic mass 10) and 50% of element Y ( atomic mass 20) is ... [ Roorkee 1994]
11%
a) XY
56%
b) X2Y
22%
c) XY3
11%
d) X2Y3
Q.10.
The number of water molecules present in a drop of water ( volume 0.0018ml) at room temperature is ... [ DCE 2000]
11%
a) 6.023 × 1019
22%
b) 1.084×1018
33%
c) 4.84×1017
33%
d) 6.023×1023
Q.11.
The set of numerical coefficients that balances the equationK2CrO4 + HCl → K2Cr2O7 + kCl + H2O is kerala CEE 2001
38%
a) 1, 1, 2, 2, 1
25%
b) 2, 2, 1, 1, 1
12%
c) 2, 1, 1, 2, 1
25%
d) 2, 2, 1, 2, 1
Q.12.
How much of NaOH is required to neutralise 1500 cm3 of 0.1N HCl? ( Na=23 ) [ KCET 2001]
12%
a) 40g
25%
b) 4g
38%
c) 6g
25%
d) 60g
Q.13.
Number of 'g' of oxygen in 32.2g of Na2SO4 . 10H2O is .. [ Haryana PMT 2000]
0%
a) 20.8
75%
b) 22.4
25%
c) 2.24
0%
d) 2.08
Q.14.
A certain amount of a metal whose equivalent mass is 28 displaces 0.7 L of H2 at S.T.P. from an acid hence mass of the element is
25%
a) 1.75 g
38%
b) 0.875 g
25%
c) 3.50 g
12%
d) 7.00 g
Q.15.
ssertion: In the reaction 2NaOH + H3 PO4 → Na2 HPO4 + 2H2 O equivalent weight of H3PO4 is M/2, where M is its molecular weight. Reason: Equivalent weight =Molecular weight/ n -factor Solution
50%
a) Both Assertion and Reasoning are true and Reasoning is correct explanation of Assertion
38%
b) Both are correct but Reason is not explanation of Assertion.
12%
c) Assertionis correct but Reason is wrong.
0%
d) Both Assertion and Reason are incorrect.
Q.16.
Assertion: One mole of sucrose reacts completely with oxygen produces 268.8 litre of carbon dioxide at STP. Reason: Amount of oxygen required for reaction is 268.8 litre.
38%
a) Both Assertion and Reasoning are true and Reasoning is correct explanation of Assertion
50%
b) Both are correct but Reason is not explanation of Assertion.
12%
c) Assertion is correct but Reason is wrong.
0%
d) Both Assertion and Reason are incorrect.
Q.17.
Assertion: When 4 moles of H2 reacts with 2 moles of O2, then 4 moles of water is formed. Reason: O2 will act as limiting reagent.
0%
a) Both Assertion and Reasoning are true and Reasoning is correct explanation of Assertion
56%
b) Both are correct but Reason is not explanation of Assertion.
33%
c) Assertion is correct but Reason is wrong.
11%
d) Both Assertion and Reason are incorrect.
Q.18.
What is the [OH-] in the final solution prepared by mixing 20.0 mL of 0.050 M HCl with 30.0 mL of 0.10 MBa(OH)2?
0%
a) 0.12 M
50%
b) 0.10 M
12%
c) 0.40 M
38%
d) 0.0050 M
Q.19.
An organic compound containing C, H and N gave the following analysis C = 40%, H = 13.33%,N = 46.67%. Its empirical formula would be
12%
a) CH4N
38%
b) CH5N
12%
c) C2H7N2
38%
d) C2H7N
Q.20.
4 g of hydrogen reacts with 16 g of oxygen to form water. The mass of water formed is
12%
a) 24 g
38%
b) 36 g
25%
c) 22.5 g
25%
d) 18 g
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