Metals and Non-Metals

Which of the following metal has the highest melting point?

• Copper

• Silver

• Sodium

• Tungsten

Cans are coated with tin not with zinc

• Zinc is more reactive

• Zinc is costlier

• Zinc has a higher melting point

• Zinc is less reactive

Which is the correct characteristic of metals

• They have 4 or three valency electron

• They have one or three valency electron

• both

• They have one or two valency electron

What is an alloy?

• A heterogeneous mixture

• a homogeneous mixture

• a compound

• an element

which of the following is the best malleable metal?

• Silver

• Aluminium

• Gold

• lead

The process of coating iron with a thin layer is called?

• Galvanisation

• rusting

• sublimation

• Photosynthesis

• X

• Y

• Z

• none of the above

Pure gold is off?

• 23 carats

• 22 carats

• 24 carats

• 26 carats

Metal liquid at room temperature

• Bromide

• Gold

• Mercury

• None of the above

On hammering a metal it changes into thin sheets this process is