Uses of Alkali Metals

Q. Match List-I with List-II :

List-I	List-II
Elements	Properties
(a) Li	(i) Poor water solubility of $I^{-}$
(b) Na	(ii) Most abundant element in cell fluid
(c) K	(iii) Bicarbonate salt used in fire extinguisher
(d) Cs	(iv) Carbonate salt decomoses easily on heating

Choose the correct answer from the options given below :

JEE MAIN 2021

1. (a) - (i), (b) - (iii), (c) - (ii), (d) - (iv)
2. (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
3. (a) - (iv), (b) - (ii), (c) - (iii), (d) - (i)
4. (a) - (i), (b) - (ii), (c) - (iii), (d) - (iv)

Q.

Molecular formula of Glauber’s salt is

1. $MgS{O}_4.7H_{2}O$

2. $CuS{O}_4.5H_{2}O$

3. $FeS{O}_4.7H_{2}O$

4. $N{a}_{2}S{O}_4.10H_{2}O$

Q. The products obtained when chlorine gas reacts with cold and dilute aqueous $NaOH$ are:

1. $C{l}^{-}$ and $Cl{O}^{-}$
2. $C{l}^{-}$ and $Cl{O}_2^{-}$
3. $Cl{O}_2^{-}$ and $Cl{O}_3^{-}$
4. $Cl{O}^{-}$ and $Cl{O}_3^{-}$

Q. Choose the correct statement(s):

1. The oxides and the peroxides of alkali metals are colorless when pure.
2. The superoxides of alkali metals are yellow or orange in color.
3. Oxides are hydrolyzed by water to form the hydroxides.
4. The superoxides of alkali metals are diamagnetic.

Q. Which of the following alkali metals have the least ionization enthalpy?

1. $Li$
2. $Na$
3. $K$
4. $Cs$

Q. Write the balanced chemical equations for the following reaction: Sodium iodate is added to a solution of sodium bisulphite.

Q. Cancer is a disease where body cells grow unchecked. A protein found in the body interferes with the growth of cancer cells. It is used for the treatment of cancer. Identify it.

1. Haemoglobin
2. Casein
3. Keratin
4. Interferon

Q. Match the compounds given in $\left(X\right)$ with their uses in $\left(Y\right)$

	$X$		$Y$
A.	$NaOH$	1.	Glass
B.	$N{a}_2{S}_2{O}_3$	2.	Germicide
C.	$NaCN$	3.	Antichlor
D.	$N{a}_{2}C{O}_3$	4.	Soap

1. $A\left(4\right),B\left(3\right),C\left(2\right),D\left(1\right)$
2. $A\left(3\right),B\left(4\right),C\left(1\right),D\left(2\right)$
3. $A\left(2\right),B\left(3\right),C\left(4\right),D\left(1\right)$
4. $A\left(1\right),B\left(2\right),C\left(3\right),D\left(4\right)$

Q. $K_{2}C{S}_3$ can be called :

1. PotassiumSulphocyanide
2. PotassiumThiocarbide
3. PotassiumThiocarbonate
4. PotassiumThiocyanate

Q. Match List I with List II