Default Title

Question (1)

QN0029773

A student tested a colourless liquid with red and blue litmus paper. Red litmus turned blue, while blue litmus remained unchanged. The liquid is most likely

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

Correct Answer: B

Explanation:

Bases turn red litmus blue and do not affect blue litmus.

Link:

Report Error

Question (2)

QN0029774

Which of the following substances contains acetic acid?

(A) Lime water
(B) Soap solution
(C) Vinegar
(D) Baking soda solution

Correct Answer: C

Explanation:

Vinegar contains acetic acid.

Link:

Report Error

Question (3)

QN0029775

A student mixes equal amounts of lemon juice and soap solution carefully. The final solution is expected to be

(A) acidic
(B) basic
(C) nearly neutral
(D) metallic

Correct Answer: C

Explanation:

Acid and base neutralise each other.

Link:

Report Error

Question (4)

QN0029776

Which natural indicator is obtained from lichens?

(A) Turmeric
(B) Litmus
(C) Rose extract
(D) China rose

Correct Answer: B

Explanation:

Litmus is extracted from lichens.

Link:

Report Error

Question (5)

QN0029777

A turmeric stain on a shirt became reddish after washing with soap. This happened because soap is

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

Correct Answer: C

Explanation:

Turmeric turns reddish-brown in bases.

Link:

Report Error

Question (6)

QN0029778

A farmer observed that crops were not growing properly because the soil had become too acidic. Which treatment is best?

(A) Add compost only
(B) Add vinegar
(C) Add lime
(D) Add lemon juice

Correct Answer: C

Explanation:

Lime neutralises acidic soil.

Link:

Report Error

Question (7)

QN0029779

Which pair of substances will most likely produce a neutral solution when mixed in proper quantity?

(A) Vinegar and lemon juice
(B) Lime water and soap solution
(C) Lemon juice and baking soda solution
(D) Tamarind water and vinegar

Correct Answer: C

Explanation:

Acid and base undergo neutralisation.

Link:

Report Error

Question (8)

QN0029780

A student used turmeric paper to test four liquids. Which liquid would most likely turn turmeric paper red?

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

Correct Answer: C

Explanation:

Bases turn turmeric paper red.

Link:

Report Error

Question (9)

QN0029781

Which of the following statements about neutralisation is correct?

(A) It produces only water
(B) It occurs only in laboratories
(C) It forms salt and water
(D) It always absorbs heat

Correct Answer: C

Explanation:

Neutralisation forms salt and water.

Link:

Report Error

Question (10)

QN0029782

A lake receives untreated acidic factory waste. Which change is most likely to occur first?

(A) Increase in aquatic life
(B) Harm to fish and plants
(C) Increase in sweetness of water
(D) Formation of ice

Correct Answer: B

Explanation:

Acidic waste harms aquatic organisms.

Link:

Report Error

Question (1)

A student tested a colourless liquid with red and blue litmus paper. Red litmus turned blue, while blue litmus remained unchanged. The liquid is most likely

Explanation:

Link:

Question (2)

Which of the following substances contains acetic acid?

Explanation:

Link:

Question (3)

A student mixes equal amounts of lemon juice and soap solution carefully. The final solution is expected to be

Explanation:

Link:

Question (4)

Which natural indicator is obtained from lichens?

Explanation:

Link:

Question (5)

A turmeric stain on a shirt became reddish after washing with soap. This happened because soap is

Explanation:

Link:

Question (6)

A farmer observed that crops were not growing properly because the soil had become too acidic. Which treatment is best?

Explanation:

Link:

Question (7)

Which pair of substances will most likely produce a neutral solution when mixed in proper quantity?

Explanation:

Link:

Question (8)

A student used turmeric paper to test four liquids. Which liquid would most likely turn turmeric paper red?

Explanation:

Link:

Question (9)

Which of the following statements about neutralisation is correct?

Explanation:

Link:

Question (10)

A lake receives untreated acidic factory waste. Which change is most likely to occur first?

Explanation:

Link:

Excel With Tutors

ExcelWithTutors

For Student

For Tutors

Learn

OUR POLICY