English Medium कक्षा १० - CBSE Question Bank Solutions

Name the metal which has been placed just below copper in the reactivity series.

Which of the two metals is more reactive?

Copper or silver

Name a sodium compound which is a constituent of many dry soap powders.

Write an equation for the reaction of:

Sodium with oxygen

Write an equation for the reaction of:

Magnesium with oxygen

What will happen if a strip of zinc is immersed in a solution of copper sulphate?

What will happen if a strip of copper is kept immersed in a solution of silver nitrate (AgNO₃)?

How would you show that silver is chemically less reactive than copper?

Give reasons for the following:

Blue colour of copper sulphate solution is destroyed when iron filings are added to it.

Explain why, the surface of some metals acquires a dull appearance when exposed to air for a long time.

Complete and balance the following equation:

\[\ce{Na + O2 ->}\]

Complete and balance the following equation:

\[\ce{Na2O + H2O ->}\]

Complete and balance the following equation:

\[\ce{Fe_{(s)} + H2O_{(g)} ->[Red heat]}\]

Complete and balance the following equation:

\[\ce{Cu(NO3)2_{(aq)} + Zn_{(s)} ->}\]

Magnesium liberates ______ gas on reacting with hot boiling water.

The white powder formed when magnesium ribbon burns in oxygen is of ______.

Ordinary aluminium strips are not attacked by water because of the presence of a layer of ______ on the surface of aluminium.

Calcium is a ______ reactive metal than sodium.

With the help of examples, describe how metal oxides differ from non-metal oxides.