State whether the following statement is true or False:

Non-metals react with dilute acids to produce a gas which burns with a ‘pop’ sound.

4 Name one metal which has a low melting point. 5 Name the metal which is the poorest conductor of heat. 7 From amongst the metals sodium, calcium, aluminium, copper and magnesium, name the metal:

(i) which reacts with water only on boiling, and

(ii) another which does not react even with steam.

8 What changes in the colour of iron nails and copper sulphate do you observe after keeping the iron nails dipped in copper sulphate solution for about 30 minutes?