Metals and Non-...

The figure shows a car bumper coated with chromium.

Why are car bumpers often coated with chromium?

The metal which does not displace hydrogen from dil. HCl is:

The order of reactivity of four metals and hydrogen is given below.
Which of the following does not give hydrogen as a product?

Identify the non-metal which is a good conductor of electricity.

The gas given off when a metal reacts with an acid is

The acid solution is taken in two test tubes. Zinc is introduced in the first test tube and magnesium in the second. Gas is evolved in the second test tube which burns with a pop sound while no gas is evolved from the first test tube. Identify the acid solution taken in the two test tubes.

Elements and compounds that occur naturally in the earth's crust are called:

Carbon cannot reduce the oxides of sodium to sodium because

Fill in the blanks by selecting the option with the correct words.
The process of removing impurities from the impure metal to obtain pure metal is known as _____of metal. The most widely used method for refining is _________. In this method, the impure metal is taken as ________ and the pure metal is taken as _____. 

Mark the correct statements: