Question : Dry ice, ammonium chloride, naphthalene balls and camphor, all these compounds are an example of:

Option 1: Sublimable substances

Option 2: Cooling agents

Option 3: Inflammable substances

Option 4: Solidifying agents

Question : How many anions surround a sodium ion in a crystal lattice of sodium chloride?

Option 1: Six

Option 2: Eight

Option 3: Seven

Option 4: Nine

Question : Baking soda is ________________.

Option 1: sodium carbonate

Option 2: sodium sulphate

Option 3: sodium hydrogen carbonate

Option 4: sodium hydroxide

Question : Which of the following is used in photography?

Option 1: Sodium bicarbonate

Option 2: Sodium thiosulphate

Option 3: Sodium hydroxide

Option 4: Sodium sulphate

Question : Which of the following is not a nitrogenous fertiliser?

Option 1: Ammonium sulphate

Option 2: Urea

Option 3: Ammonium Thiosulphate

Option 4: Superphosphate