Science MCQ (1 Marks)

Which of the following is an acid-base indicator?

Sting of an ant contains

Neutralisation reactions form

Common salt is

Turmeric is a natural indicator. On adding its paste to acid and base separately, which colours would be observed?

You are provided with three unknown solutions labelled A, B, and C, but you do not know which of these are acidic, basic, or neutral. Upon adding a few drops of red litmus solution to solution A, it turns blue. When a few drops of turmeric solution are added to solution B, it turns red. Finally, after adding a few drops of red rose extract to solution C, it turns green.
Based on the observations, which of the following is the correct sequence for the nature of solutions A, B, and C?

A solution turns the red litmus paper to blue. Excess addition of which of the following solution would reverse the change?

Which of these substances is acidic in nature?

The product of a neutralisation reaction is:

Neutralisation is a:

If a red litmus paper stays red after testing, the sample is:

The acidic substance injected by ants is:

Which of these is used to neutralise acid in soil?

What is the nature of soap solution?

Which of these substances is acidic in nature?

Which of these is an olfactory indicator?

Red rose extract turns green in the presence of:

Which natural indicator is obtained from lichens?

A substance that does not affect red or blue litmus is:

Which of the following turns blue litmus paper red?

Dheeraj observed that the stain of curry on a white shirt becomes reddish-brown when soap is scrubbed on it, but it turns yellow again when the shirt is washed with plenty of water. What might be the reason for his observation?
(i) Soap is acidic in nature
(ii) Soap is basic in nature
(iii) Turmeric is a natural indicator which gives reddish tinge in bases
(iv) Turmeric is a natural indicator which gives reddish tinge in acids.

Which olfactory indicator works only for bases?

The best indicator for olfactory test is:

Which is the correct pair?

In a neutralisation reaction,

A neutralisation reaction is:

A base is added slowly to an acid. The reaction will be?

You are provided with three unknown solutions labelled A, B, and C, but you do not know which of these are acidic, basic, or neutral. Upon adding a few drops of red litmus solution to solution A, it turns blue. When a few drops of turmeric solution are added to solution B, it turns red. Finally, after adding a few drops of red rose extract to solution C, it turns green. Based on the observations, which of the following is the correct sequence for the nature of solutions A, B, and C?

A solution turns the red litmus paper to blue. Excess addition of which of the following solution would reverse the change?