Question

7) Which one of the following element do not react with water?

a) Lithium b) potassium c) sulphur d) all of these

8) Which one of the following is most reactive metal?

a) Potassium b) sodium c ) mercury d) both a and b

9) Which one of the metal is used in making thermometer?

a) Zinc b) mercury c) bromine d) all of these

10) Which one of the non metal is used in water purification process?

a) Hydrogen b) chlorine c) nitrogen d) carbon​

Answer 1

Answer:

7) (c) Sulphur

8) (d) both a and b

9) (b) mercury

10) (b) chlorine

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