Match compounds given in List 1 with their use in List 2
List 1 List 2
A. Liquid sodium metal 1. breathing apparatus submarine
B. Potassium 2. explosive stearate
C. Potassium nitrate 3. coolant in the nuclear reactor
D. Potassium superoxide 4. soft soap

A-1; B-2; C-3; D-4

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A-3; B-4; C-2; D-1

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A-1; B-4; C-2; D-3

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A-4; B-3; C-2; D-1

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Solution

The correct option is A A-3; B-4; C-2; D-1
Liquid sodium metal is used as a coolant (heat-transfer medium) in a nuclear reactor.

Potassium is used in the preparation of potassium hydroxide which is used in the manufacture of soft soap.

Potassium nitrate is used in ceramics, colour TV tubes, fluorescent light tubes and explosive stearate.

Potassium superoxide is used in breathing apparatus, submarine and space capsules.
$K O_{2}$ reacts directly with $C O$ and $C O_{2}$ producing $O_{2}$ as follows:

$2 K O_{2} + C O \to K_{2} C O_{3} + O_{2}$

$4 K O_{2} + 2 C O_{2} \to 2 K_{2} C O_{3} + 3 O_{2}$

$4 K O_{2} + 4 C O_{2} + 2 H_{2} O \to 4 K H C O_{3} + 3 O_{2}$

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Similar questions

(X)

(Y)

$X$	$Y$
$A .$ Liquid sodium metal	$I .$ Breathing apparatus in submarine
$B .$ Potassium stearate	$I I .$ Explosive
$C .$ Potassium nitrate	$I I I .$ Coolant in nuclear reaction
$D .$ Potassium superoxide	$I V .$ Soft soap

X	Y
Liquid sodium metal	Breathing apparatus submarine
Potassium	Explosive
Potassium nitrate	Coolant in nuclear reaction
Potassium superoxide	Soft soap

	List 1		List 2
A.	If $a, b, c, d$ are in A.P., then (where $a, b, c & d$ $\in R^{+}$ )	1.	$a + d > b + c$
B.	If $a, b, c, d$ are in G.P, then (where $a, b, c & d$ $\in R^{+}$ )	2.	$b c > a d$
C.	The sum of $n$ terms of an A.P. is given by $S_{n} = b n + c n^{2}$ where $b$ and $c$ are independent of $n$ , then	3.	$T_{n} = b + (2 n - 1) c$
		4.	Common difference $(D) = (2 b - 4)$

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List 1	List 2
A. Liquid sodium metal	1. breathing apparatus submarine
B. Potassium	2. explosive stearate
C. Potassium nitrate	3. coolant in the nuclear reactor
D. Potassium superoxide	4. soft soap