ACIDS, BASES AND SALTS

Select the odd one

• spinach

• curd

• tomato

• guava

Mineral acids are highly (a)   in nature.

Tamarind, curd and lemon taste sour because

• they contain acids

• they do not contain acids

Methyl orange is a natural indicator.

• True

• False

When we eat very spicy food, the stomach produces a large amount of HCl which causes acidity. This condition is called as (a)  

The rain containing excess of acids is called as (a)  

litmus paper is

• natural indicator

• synthetic indicator

• human-made indicator

• none of these

Select the acids produced in our stomach.

• sulphuric acid

• nitric acid

• hydrochloric acid

• acetic acid

bases are soapy to touch.

• true

• false

Salts exist in .............state.

• Solid

• Liquid

• Gas