Question

1.Metals generally react with dilute acids to produce hydrogen gas. Which one of the
following metals does not react with dilute hydrochloric acid?
(a) magnesium (b) iron (c) aluminium (d) copper
2.Which of the following reacts with cold water vigorously?
(a) carbon (b) magnesium (c) sodium (d) sulphur
3.The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as
well as sodium hydroxide solution is
(a) copper (b) aluminium (c) iron (d) sodium
4. Which of the following non-metals reacts and catches fire on exposure to air?
(a) phosphorus (b) sulphur (c) nitrogen (d) hydrogen
5. Generally metallic oxides are basic and non-metallic oxides are acidic in nature.
Solution of which of the following oxides in water will change the colour of blue litmus
to red?
(a) sulphur dioxide (b) iron oxide (c) magnesium oxide (d) copper oxide
6. Which of the following property is not responsible for copper to be used as electrical
conduction wires?
(a) ductility (b) good conductor of electricity (c) colour (d) it is solid​

Answer 1

Answer:

1 copper

2 sodium

3 sodium

4 phosphorus

5 sulphur dioxide

6 colour

Answer 2

Answer:

6. its colour is not responsible for copper to be used as conduction wire.

4 . phosphorus is non metal react and catches fire on exposure to air.

5. magnesium oxide in water will change the colour of blue litmus to red .