Question : Heat resistant variety of Glass is ____.

Option 1: Pyrex glass

Option 2: Haed glass

Option 3: Flint glass

Option 4: None of these

Question : Which type of glass is used for making glass reinforced plastic ?

Option 1: Pyrex glass

Option 2: Flint glass

Option 3: Quartz glass

Option 4: Fibre glass

Question : The core of the Earth is made up of___________.

Option 1: cobalt and nickel

Option 2: iron and cobalt

Option 3: nickel and magnesium

Option 4: nickel and iron

Question : Persons suffering from myopia are advised to use

Option 1: Convex lens

Option 2: Concave lens

Option 3: Plano-convex lens

Option 4: Plano-concave lens

Question : Saccharin is made up of

Option 1: Toluene

Option 2: Phenol

Option 3: Propane

Option 4: Butane