Question

classify the following statements into acid, base and neutral substances.
1. It turns turmeric paper into red.
2. It gives ponk colour with phenolphthalein.
3. It makes china rose into a dark pink (magenta).
4. It does not give any colour change with litmus paper.
5. It is sticky to touch.
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Answer 1

Answer:

1) Basic.

2) Basic.

3) Acidic.

4) Neutral.

5) Basic.

Hope it helped.

Thanks.

Answer 2

$\huge\bf{Answer :}$

1. It turns turmeric paper into red.

• Base

2. It gives pink color with phenolphthalein.

• Base

3. It makes china rose into a dark pink (magenta).

• Acid

4. It does not give any color change with litmus paper.

• Neutral

5. It is sticky to touch.

• Acid

$\huge\bf{Extra\: Information :}$

Indicators: Indicators are the dye which changes its color and odour when it is added into an acid or aback.

Types of Indicators :

• Natural Indicators
• Synthetic Indicators
• Olfactory Indicators
• Universal Indicators

Natural Indicators: The indicators which are found in nature in the plants are called natural indicators.

• Example: Litmus, Turmeric juice, and hydrangea plants.

Synthetic Indicators: The indicators which are prepared in the laboratory are called synthetic indicators.

• Example: Methyl orange and phenolphthalein.

Olfactory Indicators: The indicators which change their odour (smell) when they are added into an acid or basic solution.

• Example: Onion and clove oil.

Universal Indicators: The indicators which show how strong a given acid or base is, named as universal indicators.