Question : Water is not effective in extinguish a fire cause by petrol because

Option 1: The flame is too hot for water to cool it down

Option 2: Water and petrol react chemically

Option 3: Water and petrol are miscible with each other

Option 4: Water and petrol are immiscible with each other and petrol which forms the upper layer  continues to burn

Question : Lanthanides are often called:

Option 1: Alkali metals

Option 2: Rare earth elements

Option 3: Inert gases

Option 4: D-block elements

Question : Absolute zero is a temperature at which

Option 1: Molecular motion in a gas would cease

Option 2: Water freezes

Option 3: All gases become liquid

Option 4: All gases become solid

Question : The purest form of water is

Option 1: Tap water

Option 2: Rain water

Option 3: Ground water

Option 4: Distilled water

Question : Iron rusts quickly in

Option 1: Rain water

Option 2: Sea water

Option 3: Distilled water

Option 4: River water