Question : Which of the following is the main compound of voter ink?

Option 1: Silver nitrate

Option 2: Ammonium chloride

Option 3: Silver chloride

Option 4: Ammonium nitrate

Question : Which of the following chemicals are widely used in gunpowder of fireworks?

Option 1: Silver nitrate and charcoal

Option 2: Silver nitrate and sulphur

Option 3: Potassium sulphate and phosphorous

Option 4: Potassium nitrate, sulphur and charcoal

Question : Saltpetre is another name for ______.

Option 1: sodium chloride

Option 2: potassium nitrate

Option 3: potassium chloride

Option 4: sodium hydroxide

Question : Sapphire and Ruby are varieties of natural:

Option 1: Aluminium sulphide

Option 2: Aluminium hydroxide

Option 3: Aluminium carbonate

Option 4: Aluminium oxide

Question : The hardness of the water is commonly measured in terms of:

Option 1: calcium carbonate equivalents

Option 2: calcium sulphate equivalents

Option 3: magnesium carbonate equivalents

Option 4: magnesium sulphate equivalents