Question : Galvanisation is the 

Option 1: deposition of zinc on iron

Option 2: deposition of tin on iron

Option 3: deposition of copper on iron

Option 4: deposition of aluminium on iron

Question : The process of depositing a layer of zinc on iron is called:

Option 1: galvanisation

Option 2: filtration

Option 3: sedimentation

Option 4: crystallisation

Question : An alloy contains copper, zinc, and nickel in the ratio of 3 : 2 : 5 respectively. What quantity of nickel (in kg) must be added to 100 kg of this alloy to have the new ratio of copper, zinc, and nickel 3 : 2 : 6 respectively?

Option 1: 20 kg

Option 2: 10 kg

Option 3: 8 kg

Option 4: 15 kg

Question : Copper wires are generally used for electrical power transmission instead of iron wire because:

Option 1: Copper is cheaper than iron

Option 2: Copper is lighter than iron

Option 3: Copper is a good conductor of electricity than iron

Option 4: Copper can take higher power than iron

Question : Which of the following is arranged in order of decreasing conductivity?

Option 1: Copper, aluminium, steel, silver

Option 2: Aluminium, silver, copper, steel

Option 3: Copper, silver, aluminium, steel

Option 4: Silver, copper, aluminium, steel