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Objective Questions
GS
GS Set-1
Chemistry
Physical Chemistry
2

Physical Chemistry MCQ with Answers

2) Total number of neutrons in 100 mL of 2M aqueous solution of phosphene will be [₁₅P³¹]:

3N^A

3.2N^A

0.2N^A

0.8N^A

Answer is:

3.2N^A

Physical Chemistry MCQ with Answers

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3) 23.4 gm of NaCl on reacting with 68 gm of AgNO₃ formed 57.4 gm of AgCl and 34 gm of NaNO₃. This is in accordance with:

The law of conservation of mass

The law of constant composition

The law of reciprocal proportion

None of these

Answer is:

The law of conservation of mass

4) 8 gm of CaCO₃ on heating gave 3.25 gm CO₂ gas. The mass of residue left is:

4 gm

4.48 gm

12 gm

16 gm

Answer is:

4.48 gm

5) In one experiment, 12 gm of Mg combines with 8 gm of O₂ to form 20 gm of MgO. In another experiment, when 150 gm of Mg combines with 100 gm of O₂, then 250 gm of MgO is formed. These two experiments follow:

The law of conservation of mass

The law of constant composition

The law of definite proportion

All of these

Answer is:

All of these

6) H combines with O to form two compounds, water and hydrogen peroxide. If 2 gm of H reacts with O completely to form 18 gm of water and 34 gm of hydrogen peroxide, then what is the ratio of mass of O combining with H?

3:09

4:16

1:02

None of these

Answer is:

0.043055556

Explanation:

The ratio of masses of oxygen which combine with 2 gm of hydrogen to give H₂O and H₂O₂ are 16 : 32 = 1 : 2.

Physical Chemistry MCQ with Answers

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2) Total number of neutrons in 100 mL of 2M aqueous solution of phosphene will be [15P31]:

3.2NA

Physical Chemistry MCQ with Answers

Related Physical Chemistry MCQ with Answers

3) 23.4 gm of NaCl on reacting with 68 gm of AgNO3 formed 57.4 gm of AgCl and 34 gm of NaNO3. This is in accordance with:

The law of conservation of mass

4) 8 gm of CaCO3 on heating gave 3.25 gm CO2 gas. The mass of residue left is:

4.48 gm

5) In one experiment, 12 gm of Mg combines with 8 gm of O2 to form 20 gm of MgO. In another experiment, when 150 gm of Mg combines with 100 gm of O2, then 250 gm of MgO is formed. These two experiments follow:

All of these

6) H combines with O to form two compounds, water and hydrogen peroxide. If 2 gm of H reacts with O completely to form 18 gm of water and 34 gm of hydrogen peroxide, then what is the ratio of mass of O combining with H?

0.043055556

Physical Chemistry MCQ with Answers

2) Total number of neutrons in 100 mL of 2M aqueous solution of phosphene will be [₁₅P³¹]:

3.2N^A

3) 23.4 gm of NaCl on reacting with 68 gm of AgNO₃ formed 57.4 gm of AgCl and 34 gm of NaNO₃. This is in accordance with:

4) 8 gm of CaCO₃ on heating gave 3.25 gm CO₂ gas. The mass of residue left is:

5) In one experiment, 12 gm of Mg combines with 8 gm of O₂ to form 20 gm of MgO. In another experiment, when 150 gm of Mg combines with 100 gm of O₂, then 250 gm of MgO is formed. These two experiments follow: