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Question (11)

QN00731

Baking soda solution feels slippery because it is

(A) acidic
(B) neutral
(C) basic
(D) salty

Correct Answer: C

Explanation:

Basic substances feel slippery.

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Question (12)

QN00732

Which acid is commonly present in vinegar?

(A) Citric acid
(B) Tartaric acid
(C) Acetic acid
(D) Oxalic acid

Correct Answer: C

Explanation:

Vinegar contains acetic acid.

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Question (13)

QN00733

Which edible substance mainly contains tartaric acid?

(A) Tamarind
(B) Amla
(C) Lemon
(D) Curd

Correct Answer: A

Explanation:

Tamarind contains tartaric acid.

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Question (14)

QN00734

A student wants to prepare lime water. Which substance should be mixed with water first?

(A) Sodium chloride
(B) Calcium oxide
(C) Vinegar
(D) Sugar

Correct Answer: B

Explanation:

Lime water is prepared using calcium oxide.

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Question (15)

QN00735

Red rose extract gives a green colour with

(A) acidic substances
(B) basic substances
(C) neutral substances
(D) all substances

Correct Answer: B

Explanation:

Red rose extract turns green in bases.

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Question (16)

QN00736

A student added soap solution to red rose extract. The extract turned green. This indicates that soap solution is

(A) acidic
(B) basic
(C) neutral
(D) colourless

Correct Answer: B

Explanation:

Soap solution is basic.

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Question (17)

QN00737

Which natural indicator cannot distinguish between acidic and neutral substances?

(A) Red rose extract
(B) Blue litmus
(C) Turmeric paper
(D) Red litmus

Correct Answer: C

Explanation:

Turmeric paper does not react with acids or neutral substances.

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Question (18)

QN00738

Turmeric paper changes to red in the presence of

(A) acids only
(B) neutral substances only
(C) bases only
(D) salts only

Correct Answer: C

Explanation:

Bases turn turmeric red.

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Question (19)

QN00739

A curry stain on a white shirt turned reddish after soap was applied. This happened because soap is

(A) acidic
(B) neutral
(C) basic
(D) colourless

Correct Answer: C

Explanation:

Soap is basic and changes turmeric colour.

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Question (20)

QN00740

A student prepared turmeric paper and tested lemon juice, sugar solution, and soap solution. Which sample would change the colour of turmeric paper?

(A) Lemon juice
(B) Sugar solution
(C) Soap solution
(D) Salt solution

Correct Answer: C

Explanation:

Soap solution is basic.

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Question (11)

Baking soda solution feels slippery because it is

Explanation:

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Question (12)

Which acid is commonly present in vinegar?

Explanation:

Link:

Question (13)

Which edible substance mainly contains tartaric acid?

Explanation:

Link:

Question (14)

A student wants to prepare lime water. Which substance should be mixed with water first?

Explanation:

Link:

Question (15)

Red rose extract gives a green colour with

Explanation:

Link:

Question (16)

A student added soap solution to red rose extract. The extract turned green. This indicates that soap solution is

Explanation:

Link:

Question (17)

Which natural indicator cannot distinguish between acidic and neutral substances?

Explanation:

Link:

Question (18)

Turmeric paper changes to red in the presence of

Explanation:

Link:

Question (19)

A curry stain on a white shirt turned reddish after soap was applied. This happened because soap is

Explanation:

Link:

Question (20)

A student prepared turmeric paper and tested lemon juice, sugar solution, and soap solution. Which sample would change the colour of turmeric paper?

Explanation:

Link:

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