In the following reaction, 4 P + 3 K O H + 3 H 2 O → 3 K H 2 P O 2 + P H 3

P is both oxidized as well as reduced

Match the reactions given in column - I with the nature of the reaction/products given in column - II Column-I Column-II A MnO 4 2 - aq + 4 H + aq p Show disproportionation B Cu 2 + aq + I - aq q Redox reaction C CrO 4 2 aq + H + aq r One of the products is diamagnetic D Ni s + 4 CO g s One of the products has a metal-oxygen-metal bond/linkage.

A → p , q , r ; B → q , r ; C → r , s ; D → r

A → p , q , ; B → q , r ; C → r , s ; D → r

A → p , q , r ; B → q , r ; C → r , s ; D → s

A → p , q , r ; B → q , r , s ; C → r , s ; D → s

EASY

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MEDIUM

Which of the following reactions are disproportionation reaction?

$(a)$ $2 C u^{+} \to C u^{2 +} + C u^{0}$

$(b)$ $3 M n O_{4}^{2 -} + 4 H^{+} \to 2 M n O_{4}^{-} + M n O_{2} + 2 H_{2} O$

$(c)$ $2 K M n O_{4} \overset{∆}{\to} K_{2} M n O_{4} + M n O_{2} + O_{2}$

$(d)$ $2 M n O_{4}^{-} + 3 M n^{2 +} + 2 H_{2} O \to 5 M n O_{2} + 4 H^{\oplus}$

Select the correct option from the following:

EASY

Chlorine water on standing loses its color and forms:

HARD

The products obtained when chlorine gas reacts with cold and dilute aqueous

NaOH

are

MEDIUM

An example of a disproportionation reaction is

EASY

Chlorine on reaction with hot and concentrated sodium hydroxide gives.

HARD

When Cl₂ gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from

EASY

In the following reaction,

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

EASY

The coefficients of

I^{-}, I O_{3}^{-}

and

H^{+}

in the redox reaction,

I^{-} + I O_{3}^{-} + H^{+} \to I_{2} + H_{2} O

in the balanced form respectively are

HARD

Match the reactions given in column - I with the nature of the reaction/products given in column - II

	Column-I		Column-II
$(A)$	${MnO}_{4}^{2 -} (aq) + 4 H^{+} (aq)$	$(p)$	Show disproportionation
$(B)$	${Cu}^{2 +} (aq) + I^{-} (aq)$	$(q)$	Redox reaction
$(C)$	${CrO}_{4}^{2} (aq) + H^{+} (aq)$	$(r)$	One of the products is diamagnetic
$(D)$	$Ni (s) + 4 CO (g)$	$(s)$	One of the products has a metal-oxygen-metal bond/linkage.