Match the catalysts to the correct processes: Catalyst Process (A) TiCl 3 ( i ) Wacker process (B) PdCl 2 ( ii ) Ziegler-Natta polymerization (C) CuCl 2 ( iii ) Contact process (D) V 2 O 5 ( iv ) Deacon's process

( A ) - ( ii ) , ( B ) - ( i ) , ( C ) - ( iv ) , ( D ) - ( iii )

( A ) - ( iii ) , ( B ) - ( ii ) , ( C ) - ( iv ) , ( D ) - ( i )

( A ) - ( ii ) , ( B ) - ( iii ) , ( C ) - ( iv ) , ( D ) - ( i )

( A ) - ( iii ) , ( B ) - ( i ) , ( C ) - ( ii ) , ( D ) - ( iv )

Phosphine is generally prepared in the laboratory by

heating white phosphorus with an aqueous solution of caustic soda.

heating phosphorus in a current of hydrogen.

decomposition of P 2 H 4 at 110 ° C .

heating red phosphorus with an aqueous solution of caustic soda.

What is inert pair effect?

The inert pair effect is the reluctance of s electrons of the outermost shell to participate in bonding. This is due to the poor screening effect of the d and f orbitals. This effect is observed among the p -block elements, due to which the lower oxidation state (two units less than the group oxidation state) becomes more stable for heavier elements in each group. For example in Pb , + 2 oxidation state is more predominant than the + 4 oxidation state.

Among the following, the correct statement(s) is(are)

The Lewis acidity of B C l 3 is greater than that of A l C l 3 .

A l C l 3 has the three-centre two-electron bonds in its dimeric structure.

E M B I B E

Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-3>Q 100

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Earn 100

Ammonia forms the complex ion $[C u (N H_{3})_{4}]^{2 +}$ with copper ions in the alkaline solutions but not in acidic solutions. What is the reason for it?

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Important Questions on The p-Block Elements

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JEE Main/Advance

IMPORTANT

Alpha Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>Exercise-3>Q 101

Match the catalysts to the correct processes:

	Catalyst		Process
(A)	${TiCl}_{3}$	( $i$ )	Wacker process
(B)	${PdCl}_{2}$	( $ii$ )	Ziegler-Natta polymerization
(C)	${CuCl}_{2}$	( $iii$ )	Contact process
(D)	$V_{2} O_{5}$	( $iv$ )	Deacon's process