Question : Which one of the following is an ohmic conductor?

Option 1: Germanium

Option 2: silicon

Option 3: carbon

Option 4: silver

Question : On a clean glass plate, a drop of water spreads to form a thin layer, whereas a drop of mercury remains almost spherical because:

Option 1: mercury is a metal

Option 2: the density of mercury is greater than that of water

Option 3: the cohesion of mercury is greater than its adhesion with glass

Option 4: the cohesion of water is greater than its adhesion with glass

Question : When  Arsenic atoms are added to Germanium lattice, it become a/an

Option 1: Insulator

Option 2: Superconductor

Option 3: Intrinsic semiconductor

Option 4: Extrinsic semiconducter

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 : Which of the following are metalloids?

Option 1: Boron, Oxygen, Aluminium

Option 2: Boron, Mercury, Iron

Option 3: Boron, Silicon, Antimony

Option 4: Aluminium, Mercury, Copper