Default Title

Question (11)

QN0029103

Which statement correctly describes gas solubility?

(A) All gases dissolve equally in water
(B) Solubility of gases depends on temperature and pressure
(C) Pressure has no effect
(D) Temperature has no effect

Correct Answer: B

Explanation:

Both temperature and pressure affect gas solubility.

Link:

Report Error

Question (12)

QN0029104

A sealed soft drink bottle is opened. The fizz appears because:

(A) pressure increases suddenly
(B) dissolved gas escapes due to pressure decrease
(C) water evaporates rapidly
(D) sugar crystallizes

Correct Answer: B

Explanation:

The decrease in pressure allows dissolved gas to escape.

Link:

Report Error

Question (13)

QN0029105

If the pressure on a gas-liquid system doubles, the amount of dissolved gas generally:

(A) decreases
(B) remains zero
(C) increases
(D) becomes constant always

Correct Answer: C

Explanation:

Higher pressure increases gas solubility.

Link:

Report Error

Question (14)

QN0029106

Which condition would keep the maximum amount of CO₂ dissolved in a soft drink?

(A) High temperature, low pressure
(B) High temperature, high pressure
(C) Low temperature, low pressure
(D) Low temperature, high pressure

Correct Answer: D

Explanation:

Low temperature and high pressure favor gas solubility.

Link:

Report Error

Question (15)

QN0029107

A bottle contains 15 units of dissolved gas under pressure. After opening, only 9 units remain dissolved. How many units escaped?

(A) 4
(B) 5
(C) 6
(D) 7

Correct Answer: C

Explanation:

15 − 9 = 6 units.

Link:

Report Error

Question (16)

QN0029108

Which observation best shows that gas is escaping from a liquid?

(A) Change in colour
(B) Formation of bubbles
(C) Increase in mass
(D) Settling of particles

Correct Answer: B

Explanation:

Escaping gas forms bubbles.

Link:

Report Error

Question (17)

QN0029109

Dissolved oxygen in ponds is obtained mainly from:

(A) rocks
(B) soil
(C) atmosphere and aquatic plants
(D) sand particles

Correct Answer: C

Explanation:

Oxygen enters water from air and aquatic plants.

Link:

Report Error

Question (18)

QN0029110

Water at 20°C contains 10 mg/L dissolved oxygen. Water at 40°C contains 6 mg/L. What percentage of the original dissolved oxygen remains?

(A) 40%
(B) 50%
(C) 60%
(D) 80%

Correct Answer: C

Explanation:

(6/10) × 100 = 60%.

Link:

Report Error

Question (19)

QN0029111

Which factor would reduce the solubility of oxygen in water?

(A) Lower temperature
(B) Higher pressure
(C) Higher temperature
(D) Sealing the container

Correct Answer: C

Explanation:

Increasing temperature decreases gas solubility.

Link:

Report Error

Question (20)

QN0029112

A carbonated drink contains 24 g dissolved CO₂. After being left open, it contains 18 g. How much CO₂ escaped?

(A) 4 g
(B) 5 g
(C) 6 g
(D) 8 g

Correct Answer: C

Explanation:

24 − 18 = 6 g.

Link:

Report Error

Question (11)

Which statement correctly describes gas solubility?

Explanation:

Link:

Question (12)

A sealed soft drink bottle is opened. The fizz appears because:

Explanation:

Link:

Question (13)

If the pressure on a gas-liquid system doubles, the amount of dissolved gas generally:

Explanation:

Link:

Question (14)

Which condition would keep the maximum amount of CO₂ dissolved in a soft drink?

Explanation:

Link:

Question (15)

A bottle contains 15 units of dissolved gas under pressure. After opening, only 9 units remain dissolved. How many units escaped?

Explanation:

Link:

Question (16)

Which observation best shows that gas is escaping from a liquid?

Explanation:

Link:

Question (17)

Dissolved oxygen in ponds is obtained mainly from:

Explanation:

Link:

Question (18)

Water at 20°C contains 10 mg/L dissolved oxygen. Water at 40°C contains 6 mg/L. What percentage of the original dissolved oxygen remains?

Explanation:

Link:

Question (19)

Which factor would reduce the solubility of oxygen in water?

Explanation:

Link:

Question (20)

A carbonated drink contains 24 g dissolved CO₂. After being left open, it contains 18 g. How much CO₂ escaped?

Explanation:

Link:

Excel With Tutors

ExcelWithTutors

For Student

For Tutors

Learn

OUR POLICY