Chemistry MCQs for PPSC FPSC KKPSC BPSC SPSC NTS Test No. 57

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There will be 25 multiple choice question in the test.
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Test Instructions:-
Test NameLecturer Chemistry
SubjectChemistry Test 57
Test TypeMCQs
Total Questions25
Total Time20 Minutes
Total Marks100

You have 20 minutes to pass to the quiz.

You have 20 minutes to pass to the quiz.

Lecturer of Chemistry Online Test No. 57

1 / 25

The vapour density of ozone is:

2 / 25

Which of the following pairs of gases contain equal number of molecules?

A). CO2 and NO2

B). CO and (CN)2

C). NO and CO

D). N2O and CO2

3 / 25

The maximum number of molecules is present in:

A). 15 L of O2 gas at STP

B). 10 L of H2 gas at STP

C). 1.5 g of H2 gas

D). 5 g of CO2 gas

4 / 25

A Compound possess 8% sulphur by mass. The least molecular mass is:

5 / 25

The incorrect statement for 14 g of CO is:

A). It occupies 2.24 litre at NTP

B).It corresponds to 0.5 mol of CO

C).It corresponds to same mol of CO and N2

D). It corresponds to 3.01 × 1023 molecules of CO

6 / 25

A breakfast cereal in advertised to contain 110 mg of sodium per 100 g of the cereal. The percent of sodium in the cereal is:

7 / 25

7.5 g of a gas occupies 5.6 litres as STP. The gas is:

A). CO

B). NO

C). CO2

D). N2O

8 / 25

Area of nuclear cross section is measured in ‘Barn’. It is equal to:

A). 10-28 m2

B). 10-18 m2

C). 10-8 m2

D). 10-34 m2

9 / 25

The number of significant figures in 306.45 and 40440 are respectively:

10 / 25

Express 145.6 L of chlorine in terms of gram moles.

11 / 25

2 g of O2 at NTP occupies the volume:

12 / 25

One mole of CH4 contains:

A). 4.0 g atoms of hydrogen

B). 3.0 g atom of carbon

C).6.02 × 1023 atoms of hydrogen

D).1.81 × 1023 molecules of CH4

13 / 25

50 g of calcium carbonate was completely burnt in air. What is the weight (in grams) of the

14 / 25

Which has maximum number of oxygen atoms?

A). 1 g of O

B).1 g of O2

C).1 g of O3

D). All have same number of O-atoms

15 / 25

The weight of one molecule of a compound C60H122 is:

A). 1.3 × 10-20 g

B). 5.01 × 10-21 g

C). 3.72 × 1023 g

D). 1.4 × 10-21 g

16 / 25

At STP the density of a gas (mol. wt. = 45) in g/L is:

17 / 25

Which of the following statement is correct?

A). 1 mole of electrons weighs 5.4 mg

B). 1 mole of electrons weighs 5.4 kg

C). 1 mole of electrons weighs 0.54 mg

D). 1 mole of electrons has 1.6 × 10-19 C of charge

18 / 25

The quantity of PV/KBT represents the:

19 / 25

The samples of NaCl are produced when Na combines separately with two isotopes of chlorine Cl35 and Cl37. Which law is illustrated?

20 / 25

1000 g calcium carbonate solution contains 10 g carbonate. The concentration of solution is:

21 / 25

One mole of a substance present in 1 kg of solvent. The correct statement regarding above solution is:

22 / 25

Which is the correct order of micro, nano, femto and pico here?

23 / 25

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will:

24 / 25

Number of moles of a solute per kilogram of a solvent is called:

25 / 25

Which of the following is the odd one with regard to mass?

A). 1 g atom of sulphur

B). 0.5 moles of CO2

C). 1 mole of O2

D). 3 × 1023 molecules of SO2

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