Question : Mercury is a:

Option 1: solid metal

Option 2: liquid metal

Option 3: Solid non-metal

Option 4: liquid non-metal

Question : In arc welding, argon is used because of its

Option 1: low reactivity with metal

Option 2: ability to lower the melting point of the metal

Option 3: high flammability

Option 4: high calorific value

Question : Supercooling is the cooling of liquid _________.

Option 1: below melting point

Option 2: below freezing point

Option 3: at melting point

Option 4: above melting point

Question : For photoelectric effect to take place, the metal used as the cathode should have_________

Option 1: high melting point

Option 2: low melting point

Option 3: low work function

Option 4: low resistance

Question : What is the full form of ITCZ?

Option 1: Intertropical converter zone

Option 2: Intertropical convergence zone

Option 3: Intertropical centre zone

Option 4: None of these