Acids are ________ in taste.

(a)

sour

(b)

sweet

(c)

bitter

(d)

salty

Aqueous solutions of _________ conduct electricity.

(a)

acid

(b)

base

(c)

salt

(d)

All of these

In acidic solutions blue litmus changes into ______ colour.

(a)

blue

(b)

green

(c)

red

(d)

white

The base is a substance that gives _____ on dissolving in water.

(a)

OH^-

(b)

H⁺

(c)

OH

(d)

H

Sodium hydroxide is a ________

(a)

acid

(b)

base

(c)

oxide

(d)

alkali

Red ant sting contains __________

(a)

acetic acid

(b)

sulphuric acid

(c)

oxalic acid

(d)

formic acid

Magnesium hydroxides are used for treating_______

(a)

acidity

(b)

head pain

(c)

teeth decay

(d)

None of these

Acid mixed with base forms ________

(a)

salt and water

(b)

salt

(c)

water

(d)

No reaction

We brush our teeth with tooth paste because it is __________ in nature.

(a)

basic

(b)

acidic

(c)

basic and acidic

(d)

None of these

In basic solution turmeric indicator paper changes from yellow to __________

(a)

blue

(b)

green

(c)

yellow

(d)

red