Brij Bihari Agrawal Solutions for Chapter: Metals and Non - Metals, Exercise 2: Summative Assessment

Will carbon monoxide ($\mathrm{CO}$) change the colour of blue litmus?

Which of the following pairs will give displacement reaction?

A non-metallic oxide which is neutral in nature is:

What is the product when sulphur reacts with oxygen?

When an aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change observed is that:

A student puts one big iron nail in four test tubes containing solutions of zinc sulphate, aluminium sulphate, copper sulphate and iron sulphate. A reddish brown coating was observed only on the surface of iron nail which was put in the solution of:

Four test tubes were taken and marked A, B, C and D respectively. 2 ml of solution of ${\mathrm{Al}}_2({\mathrm{SO}}_4{)}_3$ in water was filled in each of the four test tubes. Clean piece of metal Zn was placed in test tube A, clean copper wire was placed in test tube C and a clean aluminium wire was placed in test tube D. It was observed that no change occurred in any of the test tubes. The correct inference drawn is: 

The common method for the extraction of metals from the oxide ores is: