Default Title

Question (1)

QN0029093

Which gas is dissolved in carbonated soft drinks?

(A) Oxygen
(B) Nitrogen
(C) Carbon dioxide
(D) Hydrogen

Correct Answer: C

Explanation:

Carbon dioxide is dissolved in carbonated soft drinks.

Link:

Report Error

Question (2)

QN0029094

The process of dissolving a gas in a liquid depends strongly on:

(A) Colour of the liquid
(B) Pressure and temperature
(C) Shape of the container
(D) Mass of the container

Correct Answer: B

Explanation:

Gas solubility depends mainly on pressure and temperature.

Link:

Report Error

Question (3)

QN0029095

Solubility of gases in liquids generally __________ when temperature increases.

(A) increases
(B) decreases
(C) remains unchanged
(D) doubles

Correct Answer: B

Explanation:

Gas solubility usually decreases with increasing temperature.

Link:

Report Error

Question (4)

QN0029096

Which factor increases the solubility of carbon dioxide in a soft drink bottle?

(A) Low pressure
(B) High pressure
(C) Open container
(D) High temperature only

Correct Answer: B

Explanation:

Higher pressure increases gas solubility.

Link:

Report Error

Question (5)

QN0029097

Why are soft drink bottles sealed under pressure?

(A) To increase gas solubility
(B) To change colour
(C) To increase sweetness
(D) To reduce volume

Correct Answer: A

Explanation:

High pressure helps dissolve more carbon dioxide.

Link:

Report Error

Question (6)

QN0029098

A cold soft drink contains more dissolved carbon dioxide than a warm soft drink because:

(A) gas solubility increases with temperature
(B) gas solubility decreases with temperature
(C) pressure becomes zero
(D) sugar dissolves faster

Correct Answer: B

Explanation:

Lower temperature allows more gas to remain dissolved.

Link:

Report Error

Question (7)

QN0029099

A bottle contains 8 units of dissolved CO₂ at 10°C and 5 units at 30°C. How many units of CO₂ are lost on warming?

(A) 2
(B) 3
(C) 5
(D) 13

Correct Answer: B

Explanation:

8 − 5 = 3 units.

Link:

Report Error

Question (8)

QN0029100

Which gas dissolved in water is essential for aquatic animals?

(A) Carbon dioxide
(B) Hydrogen
(C) Oxygen
(D) Helium

Correct Answer: C

Explanation:

Aquatic animals require dissolved oxygen for respiration.

Link:

Report Error

Question (9)

QN0029101

Fish find it more difficult to survive in very warm water mainly because:

(A) water becomes heavier
(B) oxygen solubility decreases
(C) water evaporates immediately
(D) nitrogen disappears

Correct Answer: B

Explanation:

Warm water contains less dissolved oxygen.

Link:

Report Error

Question (10)

QN0029102

A lake contains 12 mg/L dissolved oxygen at 15°C and 8 mg/L at 30°C. What is the decrease in dissolved oxygen?

(A) 2 mg/L
(B) 3 mg/L
(C) 4 mg/L
(D) 5 mg/L

Correct Answer: C

Explanation:

12 − 8 = 4 mg/L.

Link:

Report Error

Question (1)

Which gas is dissolved in carbonated soft drinks?

Explanation:

Link:

Question (2)

The process of dissolving a gas in a liquid depends strongly on:

Explanation:

Link:

Question (3)

Solubility of gases in liquids generally __________ when temperature increases.

Explanation:

Link:

Question (4)

Which factor increases the solubility of carbon dioxide in a soft drink bottle?

Explanation:

Link:

Question (5)

Why are soft drink bottles sealed under pressure?

Explanation:

Link:

Question (6)

A cold soft drink contains more dissolved carbon dioxide than a warm soft drink because:

Explanation:

Link:

Question (7)

A bottle contains 8 units of dissolved CO₂ at 10°C and 5 units at 30°C. How many units of CO₂ are lost on warming?

Explanation:

Link:

Question (8)

Which gas dissolved in water is essential for aquatic animals?

Explanation:

Link:

Question (9)

Fish find it more difficult to survive in very warm water mainly because:

Explanation:

Link:

Question (10)

A lake contains 12 mg/L dissolved oxygen at 15°C and 8 mg/L at 30°C. What is the decrease in dissolved oxygen?

Explanation:

Link:

Excel With Tutors

ExcelWithTutors

For Student

For Tutors

Learn

OUR POLICY