Acid, Base and Salt - Class 10

What happens when a solution of an acid is mixed with a solution of a base in a test tube?

(i) Temperature of the solution decreases

(ii) Temperature of the solution increases

(in) Temperature of the solution remains the same

(iv) Salt formation takes place

• (i) and (iv)

• (i) and (iii)

• (ii) only

• (ii) and (iv)

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-4

When hydrogen chloride gas is prepared on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to

• absorb the evolved gas

• moisten the gas

• absorb moisture from the gas

• absorb Cl– ions from the evolved gas

Which one of the following salts do not contain water of crystallisation?

• Blue vitriol

• Baking soda

• Washing soda

• Gypsum

In terms of acidic strength, which one of the following is in the correct increasing order?

• Water < Acetic acid < Hydrochloric acid

• Water < Hydrochloric acid < Acetic acid

• Acetic acid < Water < Hydrochloric acid

• Hydrochloric acid < Water < Acetic acid

Tomato is a natural source of which acid?

• Acetic acid

• Citric acid

• Tartaric acid

• Oxalic acid

What is formed when zinc reacts with sodium hydroxide?

• Zinc hydroxide and sodium

• Sodium zincate and hydrogen gas

• Sodium zinc-oxide and hydrogen gas

• Sodium zincate and water

Brine is an

• an aqueous solution of sodium hydroxide

• an aqueous solution of sodium carbonate

• an aqueous solution of sodium chloride

• an aqueous solution of sodium bicarbonate

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-3

Na2CO3. 10H2O is

• washing soda

• baking soda

• bleaching powder

• tartaric acid

At what temperature is gypsum heated to form Plaster of Paris?

• 90°C

• 100°C

• 110°C

• 120°C

Tags

NGSS.MS-PS1-4

How many water molecules does hydrated cal-cium sulphate contain?

• 5

• 10

• 7

• 2