Question1.

Acid and bases indicator are mixture of –

(a) their salt

(b) dyes

(c) solid indicator

(d) basics salt

Question2.

Sodium and potassium are two metal, their carbonates reacts with strong acid they produces __________.

Question3.

You have three solution A, B and C. The pH of  Solution A is 3 ,pH of solution B is 7.5 and pH of solution C is 13. Which solution has more H⁺ ion and OH^-? Which of the solution is acidic and basic in nature?

Question4.

Why 10 ml acetic acid cannot neutralize the 10ml NaOH while only 8ml of hydrochloric acid neutralized the 10ml NaOH?

Question5.

Give the name of the process which involve Production of sodium hydroxide from sodium chloride –

(a) Solvay process

(b) Chlor-alkali process

(c) Brine degradation

(d) None of these

Question6.

(a) Identify the A and B.

(b) Write chemical name of B.

Question7.

What happens when excess carbon dioxide is passed through lime water? Give its reaction.

Question8.

To determine the presence of oxalic acid ,NaOH is used for assay can you determine the neutral value of solution,

If 40ml of oxalic acid is used to neutralize 75ml of NaOH. How much oxalic acid is required to neutralize 10ml of NaOH?

Question9.

Mixing an acid or base with water results in decrease in the concentration of ions –

(a) H₃O⁺/H⁺

(b) H₃O⁺/OH^-

(c) NaOH /HCl

(d) H₂O/H⁺

Question10.

What is the role of antacid in indigestion?

Question11.

What is acid rain and pH of acid rain? How it affects the aquatic life?

Question12.

What is water of crystallization?

Question13.

The acid used for the manufacture of fertilizers and explosives is

(a) Nitric acid

(b) Sulfuric acid

(c) Phosphoric acid

(d) Hydrochloric acid

Question14.

What if ferric oxide is dipped in a HCl filled beaker? Name the product formed.

Question15.

Tomato is a natural source of ____________ acid.

(a) Ascorbic acid

(b) Citric acid

(c) Tartaric acid

(d) Oxalic acid

Question16.

Sodium carbonate is a basic salt because it is a salt of a -

(a) Strong acid and weak base

(b) Weak base and weak acid

(c) weak acid and strong base

(d) strong acid and strong base

Question17.

Alkalis are

(a) acid, which are soluble in water

(b) acid, which are insoluble in water

(c) base, which are insoluble in water

(d) base, which are soluble in water

Question18.

Give two property and chemical name of following –

(a) Baking soda

(b) Gypsum

(c) Washing soda

(d) Bleaching powder

Question19.

Enamel of made up of ________ and get corrode when pH of mouth is below ________.

Question20.

The concentration of hydrogen ion is a sample of lemon drink is 2 x 10^-5M . What is its pH?

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