Question

Match List-I and List-II:

List-I	List-II
(a) Be	(i) treatment of cancer
(b) Mg	(ii) extraction of metals
(c) Ca	(iii) incendiary bombs and signals
(d) Ra	(iv) windows of X-ray tubes
–	(v) bearings for motor engines

Choose the most appropriate answer from the option given below:

• A. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(v)
• B. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
• C. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
• D. (a)-(iii), (b)-(iv), (c)-(v), (d)-(ii)

Answer 1

The correct option is C

(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

Explanation of the correct answer:

(C)(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

(a)Be-(iv)windows of X-ray tubes

Motor engine bearings are used, Bearings can be made smaller and lighter because of the superior strength copper-beryllium has with the alternative bronze landing gear material.

(b) Mg -(iii)incendiary bombs and signals

It combines with water to produce gas and oxygen. Both the powdered and solid forms of magnesium are employed as incendiary agents for light and antipyretic reasons.

(c) Ca-(ii)extraction of metals

Pure calcium metal is employed as a reducing agent when producing other metals such as thorium, uranium and zirconium.

(d)Ra-(i)treatment of cancer

Ra- is used in cancer treatment because it is radioactive.

Hence, option (c) is correct.

List -I	List-II
(a)Be	(iv)windows of X-ray tubes
(b)Mg	(iii)incendiary bombs and signals
(c) Ca	(ii)extraction of metals
(d)Ra	(i)treatment of cancer