Olfactory Indicators

Q.

What is an olfactory indicator and example?

Q. Is litmus paper and pH paper the same thing?

Q.

Ammonia turns red litmus blue. What is its nature?

1. Neutral

2. Acidic

3. Basic

4. Can't say

Q. Olfactory indicators change their on addition of an acid or a base.

1. state
2. colour
3. odour

Q.

Do all indicators reacts with both acids and bases?

Q.

Olfactory indicators respond to acid or base by change in smell.

Say True or False.

1. True

2. False

Q. Olfactory indicators change their on addition of an acid or a base to it.

1. state
2. colour
3. odour

Q.

A yellow stain of curry on a white clothe turns reddish-brown when it comes in contact with soap. Why does this happen?

1. Soap is basic in nature

2. Due to the presence of water

3. Neutral solution

4. Soap is acidic in nature

Q.

Which of the following(s) is/are olfactory indicators?

1. Litmus

2. Onion

3. Clove

4. Red cabbage

Q. 1. What is the action of red litmus on (i) Dry ammonia gas (ii) solution of ammonia gas in water ?
2. Explain how acid rain is one of the major cause for discoloring of Taj Mahal. [3 MARKS]

Q. Which of the following is an olfactory indicator?

1. Turmeric
2. Phenolphthalein
3. Onion
4. Litmus

Q. Olfactory Indicators indicate presence of acid or base by change in ______.

1. colour
2. temperature
3. smell
4. taste

Q. Olfactory indicators detect acids and bases by change in smell.

1. True
2. False

Q.

Which of the following(s) is/are olfactory indicators?

1. Red Litmus

2. Onion

3. Clove

4. Extract of red cabbage

Q. Olfactory indicators change their on addition of an acid or a base to it.

1. state
2. colour
3. smell

Q. Olfactory indicators detect acids and bases by change in smell.

1. True
2. False

Q. Olfactory Indicators indicate presence of acid or base by change in ______.

1. temperature
2. smell
3. colour
4. taste