Metals and Non-Metals Worksheet-7

Metals and Non-Metals Worksheet-7

1. The oxides of nonmetal which is neutral is:

(a) SO₂               (b) NO₂              (c) P₂O₃              (d) CO

2. Phosphorus combine with oxygen to form how many types of oxides?

(a) three             (b) two               (c) one                (d) four

3. ______ dissolves in water to produce sulphuric acid.

(a) SO₂               (b) S                    (c) SO₃               (d) 2S

4. Nonmetals + acids give ?

(a) react slow                                (b) react violently

(c) react moderately                    (d) no reaction

5. Nonmetals react with hydrogen to form:

(a) covalent compounds             (b) ionic compounds

(c) electrovalent compounds     (d) coordinate compounds

6. P₄ + 6Cl₂ →

(a) 2P₂Cl₆          (b) 4PCl₃            (c) PCl₆              (d) P₂Cl₅

7. Mercury is used in thermometers because:

(a) it does not wet the glass        (b) it expands on heating

(c) it is a liquid                              (d) all of these

8. _____ is used to make photographic films.

(a) sodium chloride                     (b) silver bromide

(c) potassium iodide                   (d) copper chloride

9. A crucible used in laob to heat solid at high temperature is made of:

(a) sulphur        (b) silicon          (c) graphite       (d) phosphorus

10. The nonmetal used to treat rubber in the process of vulcanisation is:

(a) sulphur                                     (b) phosphorus

(c) carbon                                      (d) chloride

11. Match-head contains:

(a) N₂                  (b) I₂                   (c) P                    (d) C

12. _____ is used in the hydrogenation of vegetable oils.

(a) Cl₂                 (b) N₂                 (c) O₂                  (d) H₂

13. Due to its semiconductor properties, the nonmetal used in computers, TV, etc. is:

(a) carbon         (b) silicon          (c) bromine       (d) fluorine

14. In the native state of metal, it is present:

(a) as a mixture with a metal

(b) in free state

(c) as a mixture with a nonmetal

(d) as a mixture with a compound

15. Which of the following metal is present in native state?

(a) Platinum                                  (b) Iron

(c) Potassium                                (d) Copper

Answer Key:

(1)-(d); (2)-(b); (3)-(c); (4)-(d); (5)-(a); (6)-(b); (7)-(d); (8)-(b); (9)-(c); (10)-(a); (11)-(c); (12)-(d); (13)-(b); (14)-(b); (15)-(a)