Question : Which one of the following is not a compound?

Option 1: Sodium Chloride

Option 2: Carbon Monoxide

Option 3: Iron

Option 4: Water

Question : Saltpetre is another name for ______.

Option 1: sodium chloride

Option 2: potassium nitrate

Option 3: potassium chloride

Option 4: sodium hydroxide

Question : Which of the following liquids can dissolve noble metals such as Gold and Platinum?

Option 1: Formic acid

Option 2: Aqua regia

Option 3: Acetic acid

Option 4: Chloroform

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 is radioactive?

Option 1: Helium

Option 2: Sodium

Option 3: Thorium

Option 4: Platinum