Metals and Non-Metals Worksheet-8

Metals and Non-Metals Worksheet-8

1. Which of the following is called as noble metal?

(a) Mercury      (b) Gold             (c) Lithium        (d) Cesium

2. Haematite is an ore of:

(a) Fe                  (b) Zn                 (c) Cu                 (d) Al

3. Fe₃O₄ is the chemical formula of:

(a) monazite     (b) magnetite    (c) haematite    (d) bauxite

4. Copper, which is extracted from cuprite, is a/an:

(a) sulphide ore                            (b) carbonate ore

(c) oxide ore                                  (d) halide ore

5. Which of the following is a carbonate ore of copper?

(a) Cuprite                                     (b) Pyrite

(c) Copper glance                         (d) Malachite

6. Which of the following are the ores of zinc?

(a) Calamine and zinc blend      (b) Zinc blend and cerussite

(c) Calomine and siderite           (d) Zinc blend and carnallite

7. The metal extracted from limestone, marble and chalk is:

(a) sodium         (b) Calcium       (c) Aluminium (d) iron

8. The chemical formula of bauxite is:

(a) CaFeS₂         (b) MgCO₃        (c) Al₂O₃∙2H₂O (d) PbCO₃

9. Rocksalt is:

(a) KCl               (b) CaCl₂            (c) MgCl₂           (d) NaCl

10. A homogenous solid solution of two or more metals is:

(a) alloy              (b) allotrope      (c) isotope         (d) isobar

11. Stainless steel is an alloy of:

(a) Fe, Cr, C, Ni                            (b) Fe, Ni, C

(c) Cu, Al                                        (d) Fe, Al, Ni

12. Brass is an alloy of:

(a) Cu, Sn          (b) Cu, Zn          (c) Cu, Al           (d) Sn, Pb

13. The chemical formula of cuprite is:

(a) Cu₂S             (b) CuFeS₂        (c) CuCO₃                   (d) Cu₂O

14. An ore of Cu₂S is:

(a) copper glance                         (b) malachite

(c) cuprite                                      (d) pyrites

15. Extraction of copper is done from copper pyrites which contain small quantity of:

(a) zinc               (b) iron               (c) sodium         (d) carbon

Answer Key:

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