Metals And Non-Metals

What are Rubies and Sapphires chemically known as?

Which one of the following pairs of metals constitutes the lightest metal and the heaviest metal, respectively?

Which one of the following does not contain silver?

Which one of the following non-metals is not a poor conductor of electricity?

Which are the materials generally employed as solder in soldering operations in electronics?

Which one of the following is the correct sequence of the given substances in the decreasing order of their densities?

Salts of which of the following elements provide colours to fireworks?

Which one of the following statements is NOT correct?

Match List I with List II and select the correct answer using the codes given below the Lists:

Which one of the following materials is very hard and very ductile?

Aluminium surfaces are often ‘anodized’. This means the deposition of a layer of

Consider the following statements:

Coke is one of the materials of the charge added to blast furnace for the production of steel/iron. Its function is to

Assertion (a): Sodium metal is stored under kerosene. Reason (R) Metallic sodium melts when exposed to air.

Which one of the following metals does not form amalgam?

The most reactive among the halogens is

Which one of the following elements is alloyed with iron to produce steel which can resist high temperatures and also have high hardness and abrasion resistance?