Revision Quiz-Metals and Non-metals

1. An element reacts with oxygen to give a compound with a high melting point. The compound is soluble in water. The element is likely to be?

• (a) calcium

• (b) carbon

• (c) iron

• (d) silicon

The second most abundant metal in the earth’s crust is?

(a) oxygen (b) silicon (c) aluminium (d) iron

• (a) oxygen

• (b) silicon

• (c) aluminium

• (d) iron

A greenish coating develops on copper utensils due to formation of

• (a) CuCO₃

• (b) Cu(OH)₂

• (c) Cu(OH)₂.CuCO₃

• (d) CuO

. The bronze medals are made up of

• (a) Cu and Zn

• (b) Zn and Ni

• (c) Cu and Sn

• (d) Cu, Zn, Tn

Silver articles becomes black on prolonged exposure to air. This is due to the formation of

• (a) Ag2O

• (b) Ag2S

• (c) AgCN

• (d) Ag2O and Ag2S

A student placed an iron nail in copper sulphate solution. He observed the reddish brown coating on the iron nail which is

• (a) soft and dull

• (b) hard and flading

• (c) smooth and shining

• (d) rough and granular

8. Al₂O₃ + 2NaOH → …… + H2O

• (a) Al(OH)₃

• (b) Na₂O

• (c) NaAlO₂

• (d) AlNaO₂

11. Example of an amphoteric oxide is:

• (a) Na₂O

• (b) K₂O

• (C) Al₂O₃

• (d) MgO

10. Which of tire following are not ionic compounds?

(i) KCl

(ii) HCl

(iii) CCl4

(iv) NaCl

• (a) (i) and (ii)

• (b) (ii) and (iii)

• (c) (iii) and (iv)

• (d) (i) and (iii)

12. An element X is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element from the following

• (a) Mg

• (b) Na

• (c) P

• (d) Ca