Question Bank

Which of the following metals has the highest melting point?

Type metal, used in printing, is an alloy of:

What is the oxidation state of Iron in Fe3O4?

Which metal is used to protect iron from rusting by the method of 'Sacrificial Protection'?

The most common ore of Magnesium found in sea water is:

The purity of gold is expressed in Karats. 24 Karat gold is:

Which metal is used as a 'getter' in vacuum tubes to remove traces of oxygen?

In the extraction of Iron, the temperature in the Hearth (bottom part of the blast furnace) is approximately:

What is the density of CO2 relative to air?

What is the atomic number of carbon?

Which of the following is the hardest natural allotrope of carbon?

The property by which carbon atoms bond with other carbon atoms to form long chains is called:

What is the general formula for the alkane homologous series?

Which gas is commonly known as 'marsh gas'?

What is the percentage of carbon dioxide in the Earth's atmosphere approximately?

Which allotrope of carbon is used as a lubricant and in pencil leads?

Dry ice is the solid form of which substance?

How many valence electrons does a carbon atom have?

Which of the following is a greenhouse gas?

The process of heating wood in the absence of air to obtain charcoal is called: