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Question (11)

QN0029026

A solution contains 5 g salt in 100 mL water. Another contains 10 g salt in 100 mL water. Which is more concentrated?

(A) First solution
(B) Second solution
(C) Both same
(D) Cannot be compared

Correct Answer: B

Explanation:

More solute in the same volume gives higher concentration.

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Question (12)

QN0029027

Which solution is more concentrated?

(A) 2 spoons salt in 100 mL water
(B) 4 spoons salt in 100 mL water
(C) Both equally concentrated
(D) Cannot be determined

Correct Answer: B

Explanation:

Greater amount of solute in the same solvent means greater concentration.

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Question (13)

QN0029028

A solution has 12 g solute in 60 mL solvent. Another has 18 g solute in 120 mL solvent. Which is more concentrated?

(A) First
(B) Second
(C) Both same
(D) Cannot be compared

Correct Answer: A

Explanation:

12/60 = 0.2 while 18/120 = 0.15. First is more concentrated.

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Question (14)

QN0029029

If 20 g salt dissolves completely in water and 5 g remains undissolved, the solution is:

(A) dilute
(B) unsaturated
(C) saturated
(D) non-uniform

Correct Answer: C

Explanation:

Presence of undissolved solute indicates saturation.

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Question (15)

QN0029030

Which mixture forms a solution?

(A) Sand and water
(B) Sawdust and water
(C) Sugar and water
(D) Chalk powder and water

Correct Answer: C

Explanation:

Sugar dissolves uniformly in water.

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Question (16)

QN0029031

A student compares two solutions. Solution P contains 8 g salt in 40 mL water and Solution Q contains 15 g salt in 100 mL water. Which is more concentrated?

(A) P
(B) Q
(C) Both equal
(D) Cannot be compared

Correct Answer: A

Explanation:

8/40 = 0.2 and 15/100 = 0.15. P is more concentrated.

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Question (17)

QN0029032

If 25 g sugar is dissolved in 250 mL water and another solution contains 15 g sugar in 100 mL water, which is more concentrated?

(A) First
(B) Second
(C) Both equal
(D) None

Correct Answer: B

Explanation:

25/250 = 0.1 and 15/100 = 0.15. Second is more concentrated.

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Question (18)

QN0029033

A solution can still dissolve more solute at a given temperature. It is:

(A) saturated
(B) concentrated
(C) unsaturated
(D) insoluble

Correct Answer: C

Explanation:

An unsaturated solution can dissolve more solute.

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Question (19)

QN0029034

Which of the following is a non-uniform mixture?

(A) Salt solution
(B) Sugar solution
(C) ORS solution
(D) Sand in water

Correct Answer: D

Explanation:

Sand does not dissolve uniformly in water.

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Question (20)

QN0029035

A student prepares three solutions using the same amount of water. They contain 2 g, 6 g and 10 g salt respectively. Which is the most concentrated?

(A) 2 g
(B) 6 g
(C) 10 g
(D) All equal

Correct Answer: C

Explanation:

Highest solute amount gives highest concentration.

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Question (11)

A solution contains 5 g salt in 100 mL water. Another contains 10 g salt in 100 mL water. Which is more concentrated?

Explanation:

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Question (12)

Which solution is more concentrated?

Explanation:

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Question (13)

A solution has 12 g solute in 60 mL solvent. Another has 18 g solute in 120 mL solvent. Which is more concentrated?

Explanation:

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Question (14)

If 20 g salt dissolves completely in water and 5 g remains undissolved, the solution is:

Explanation:

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Question (15)

Which mixture forms a solution?

Explanation:

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Question (16)

A student compares two solutions. Solution P contains 8 g salt in 40 mL water and Solution Q contains 15 g salt in 100 mL water. Which is more concentrated?

Explanation:

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Question (17)

If 25 g sugar is dissolved in 250 mL water and another solution contains 15 g sugar in 100 mL water, which is more concentrated?

Explanation:

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Question (18)

A solution can still dissolve more solute at a given temperature. It is:

Explanation:

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Question (19)

Which of the following is a non-uniform mixture?

Explanation:

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Question (20)

A student prepares three solutions using the same amount of water. They contain 2 g, 6 g and 10 g salt respectively. Which is the most concentrated?

Explanation:

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