Chemistry MCQs for PPSC FPSC KKPSC BPSC SPSC NTS Test No. 59

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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 NameLecturer Chemistry
SubjectChemistry Test 5
Test TypeMCQs
Total Questions25
Total Time20 Minutes
Total Marks100
0%

You have 20 minutes to pass to the quiz.

You have 20 minutes to pass to the quiz.


Lecturer of Chemistry Online Test No. 59

1 / 25

800 g of a 40% solution by weight was cooled. 100 g of solute precipitated. The percentage composition of
remaining solution is:

2 / 25

What is the volume (in litre) of oxygen required at STP to completely convert 1.5 moles of sulphur to sulphur dioxide?

3 / 25

120 g of urea is present in 5 litre of solution. The active mass of urea is:

4 / 25

In acidic medium, dichromate ion oxidize ferrous ion to ferric ion. If the gram molecular weight of potassium dichromate is 294 g, its equivalent weight is:

5 / 25

Which has maximum number of molecules?

A). 1.7 g NH3

B). 2 g He

C). 4.6 g NO2

D).3.2 g SO2

6 / 25

The normality of orthophosphoric acid having purity of 70% be weight and specific gravity 1.54 is:

7 / 25

Volume of a gas at NTP is 1.12 × 10-7 cc. The number of molecules in it is:

A). 3.01 × 1012

B). 3.01 × 1018

C). 3.01 × 1024

D). 3.01 × 1030

8 / 25

2.76 g of silver carbonate (At. mass of Ag = 108) on being heated strongly yields a reduce weight:

9 / 25

What is the volume (in litres) of oxygen at STP required for complete combustion of 32 g of CH4?
(mol. wt. of CH4 = 16):

10 / 25

The normality of H2SO4 having 50 milliequivalent in 2 L solution is:

11 / 25

The oxide of an element contains 67.67% of oxygen and the vapour density of its volatile chloride is 79. Equivalent weight of the element is:

12 / 25

The equivalent weight of phosphoric acid (H3PO4) in

NaOH + H3PO4..........>NaH2PO4 + H2O is

13 / 25

1021 molecules are removed from 200 mg of CO2. The moles of CO2 left are:

A). 2.88 × 10-3

B). 28.8 × 10-3

C). 288 × 10-3

D). 28.8 × 103

14 / 25

4 g caustic soda is dissolved in 100 cc of solution. The normality of solution is:

15 / 25

0.25 mol of P4 molecules contains......................atoms:

A). 1.764 × 1023

B). 6.02 × 1019

C). 6.023 × 1023

D). 8.086 × 1023

16 / 25

Two grams of sulphur is completely burnt in oxygen to form SO2, In this reaction, what is the volume (in litres) of oxygen consumed at STP? (At. wt. of sulphur and oxygen are 32 and 16, respectively):

17 / 25

How many water molecules are there in one drop of water (volume = 0.0018 mL) at room temperature?

A). 4.86 × 1017

B). 6.023 × 1024

C). 2.584 × 1019

D). 6.023 × 1019

18 / 25

The total number of protons in 10 g of calcium carbonate is (N0 = 6.023 × 1023):

A). 3.01 × 1024

B). 4.06 × 1024

C). 30.1 × 1024

D). 3.01 × 1023

19 / 25

How many grams of CH3OH would have to be added to water to prepare 150 mL of a solution that is 2.0 M
CH3OH?

A). 9.6 g

B). 906 g

C). 4.3 × 102 g

D). 9.6 × 103 g

 

20 / 25

‘X’ litres of carbon monoxide is present at STP. It is completely oxidized to CO2. The volume of CO2 formed is 11.207 litres at STP. What is the value of ‘X’ in litres?

21 / 25

The volume of 1.0 g of hydrogen in litres at NTP is:

22 / 25

Maximum number of molecules will be in:

A). 1 g of H2

B).  10 g of H2

C). 22 g of O2

D). 44 g of CO2

23 / 25

The molar concentration of 20 g of NaOH present in 5 litre of solution is:

24 / 25

One mole of fluorine is reacted with two mole of hot and concentrated KOH. The products formed are KF, H2O and O2. The molar ratio of KF, H2O and O2 respectively is:

25 / 25

How many grams of KCl must be added to 75 g of water to produce a solution with a molality of 2.25?

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