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.
Answer of the questions will change randomly each time you start this test.
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Test Instructions:-
Test Name Lecturer Chemistry
Subject Chemistry Test 57
Test Type MCQs
Total Questions 25
Total Time 20 Minutes
Total Marks 100

You have 20 minutes to pass to the quiz.

Lecturer of Chemistry Online Test No. 57

1 / 25

2 g of O2 at NTP occupies the volume:

2 / 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:

3 / 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

4 / 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

5 / 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

6 / 25

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

A). CO

B). NO

C). CO2

D). N2O

7 / 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

8 / 25

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

9 / 25

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

10 / 25

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

11 / 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

12 / 25

The quantity of PV/KBT represents the:

13 / 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

14 / 25

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

15 / 25

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

16 / 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:

17 / 25

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

18 / 25

The vapour density of ozone is:

19 / 25

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

20 / 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

21 / 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

22 / 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

23 / 25

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

24 / 25

Express 145.6 L of chlorine in terms of gram moles.

25 / 25

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

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