Chapter 5 class 7 acid bases & salt ncert

Question 1.

When an acidic solution is mixed with a basic solution, both the solution

• Neutralise the effect of each other

• Neutralise the effect of base

• Neutralise the effect of acid

Question 2

What happens when acid and bases are mixed together ?

• forms salts

• acid gets destroyed

• base gets destroyed

• both gets destroyed

Question 3

When a substance is nor acidic nor basic what is it?

• salts

• nutral

Question 4

In which reaction dose heat is produced, or evolved?

• Neutralisation

• Indigestion

• Acid Rain

Question 5

In neutralisation a new substance is formed? Name the substance.

• Bases

• Acids

• Salts

• None of the above

Question 6

In which of the following ways we can find salts?

• Acidic

• Basic

• Neutral

• None of them

Question 7

The reaction between bases and acids are

(a)  

Question 8

Which of the following acids helps in digestion of food?

• Hydrochloric Acid

• Mucus

• Methel Orange

Question 9

An antacid which helps in neutralisation of excessive acids

• Magnesium hydroxide

• milk of magnesia

• Salts

• None of them

Question 10

Ant bites could be neutralised by rubbing

• Baking soda

• Lemon

• Curd

• Vinegar