Nettle sting is a natural source of which acid?

Lime water reacts with chlorine to give

Alkalis are

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

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

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

Na₂CO₃ . 10H₂O is

Brine is an

Tomato is a natural source of which acid?

What is formed when zinc reacts with sodium hydroxide?

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

Which one of the following salts does not con-tain water of crystallisation?

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

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

Which of the following gases can be used for storage

Pb + CuCl₂ → PbCl₂ + Cu
The above reaction is an example of:

Name the products formed when iron filings are heated with dilute hydrochloric acid

Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is:

The condition produced by aerial oxidation of fats and oils in foods marked by unpleasant smell and taste is called:

A substance added to food containing fats and oils is called:

What type of chemical reactions take place when electricity is passed through water?

In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate?

Which of the following is an endothermic process?

MnO₂ + 4HCl → ₂ + 2H₂O + Cl₂
Identify the substance oxidized in the above . equation.

Which among the following statement(s) is (are) true?
Exposure of silver chloride to sunlight for a long duration turns grey due

(i) the formation of silver by decomposition of silver chloride
(ii) sublimation of silver chloride
(iii decomposition of chlorine gas from silver chloride
(iv) oxidation of silver chloride

Give the ratio in which hydrogen and oxygen are present in water by volume.

The process of reduction involves

Oxidation is a process which involves

Which of the following are exothermic processes?
(i) Reaction of water with quick lime
(ii) Dilution of an acid
(iii) Evaporation of water
(iv) Sublimation of camphor (crystals)

Magnesium ribbon is rubbed before burning because it has a coating of