Revision (Chapter 1&2)

Na₂CO₃.10H₂O is known as –

• Baking soda

• Baking powder

• Washing soda

• Bleaching powder

Which of the following are present in a dilute Aqueous solution of hydrochloric acid?

• H₃O+ + Cl^–

• H₃O + OH^–

• Cl^– + OH^–

• Unionised HCl

Identify the product which represents the solid state in the above reaction.

• Barium chloride

• Barium sulphate

• Sodium chloride

• Sodium sulphate

Which of the following salts does not contain water of crystallisation?

• Blue vitriol

• Baking soda

• washing soda

• gypsum

Mild non-corrosive basic salt is

• Ca (OH)2

• NaCl

• NaOH

• NaHCO3

The colour of the solution observed after 30 minutes of placing zinc metal to copper sulphate solution is

• Blue

• Colourless

• Dirty green

• Reddish Brown

On adding dilute sulphuric acid to a test tube containing a metal ‘X’, a colourless gas is produced when a burning match stick is brought near it burns with pop sound. Which of the following correctly represents metal ‘X’?

• Sodium

• Sulphur

• Copper

• Silver

An element with atomic number_____ will form a basic oxide.

• 7 (2,5)

• 17 (2,8,7)

• 14 (2,8,4)

• 11 (2,8,1)

Which of the following is the correct observation of the reaction shown in the above set up?

• Brown powder of Magnesium oxide is formed.

• Colourless gas which turns lime water milky is evolved.

• Magnesium ribbon burns with brilliant white light.

• Reddish brown gas with a smell of burning Sulphur has evolved