MEDIUM
7th Kerala Board
IMPORTANT
Earn 100

Can phenolphthalein be used as an indicator to distinguish between acid and alkali?

Important Questions on Acids and Alkalis

EASY
7th Kerala Board
IMPORTANT

See the table given below:

Question Image 

What are the substances that can be used as indicators to identify acid?
EASY
7th Kerala Board
IMPORTANT

See the table given below:

Question Image 

What are the indicators that can he used to identify alkali?
HARD
7th Kerala Board
IMPORTANT
What happens when dilute solutions of hydrochloric acid and caustic soda are mixed together?
HARD
7th Kerala Board
IMPORTANT
Why are indicators like phenolphthalein used while conducting neutralisation reactions?
HARD
7th Kerala Board
IMPORTANT
Soil in Kerala is generally acidic in nature. Do you understand why lime, which is alkaline, is added to soil?
EASY
7th Kerala Board
IMPORTANT

What are the advantages of making soap ourselves?

MEDIUM
7th Kerala Board
IMPORTANT
The pH values of different soil samples are given in the option. Which of the soils should be treated with lime?
HARD
7th Kerala Board
IMPORTANT
When a magician rubbed white paper with a handkerchief, red letters appeared on the paper. Which of the following materials might have been used by him?