(C) The statement that nanosized $Cu$ and $Pd$ clusters have less hardness than bulk metal is incorrect.In reality,nanosized copper and palladium clus

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Nanosized $Cu$ and $Pd$ clusters have very less hardness than bulk metal.

(C) The statement that nanosized $Cu$ and $Pd$ clusters have less hardness than bulk metal is incorrect.In reality,nanosized copper and palladium clusters with a diameter in the size range of $5-7 \ nm$ can have hardness up to $500 \%$ greater than the bulk metal due to the Hall-Petch effect.

Class 12 Chemistry Surface Chemistry Catalyst and Catalysis

Easy

Which statement from the following about nanomaterials is $NOT$ correct?

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A
As the particle size decreases,the total surface area of particles increases.
B
Nanomaterial-based catalysts exhibit increased catalytic activities.
C
Nanosized $Cu$ and $Pd$ clusters have very less hardness than bulk metal.
D
Carbon nanotubes can act as electrical conductors.

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Chapter

Surface Chemistry

Subtopic

Catalyst and Catalysis

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In a chemical reaction,a catalyst . . . . .

Easy

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Match the catalysts to the correct processes:

Catalyst Process

$A. TiCl_4$ $i. \text{Wacker process}$

$B. PdCl_2$ $ii. \text{Ziegler-Natta polymerization}$

$C. CuCl_2$ $iii. \text{Contact process}$

$D. V_2O_5$ $iv. \text{Deacon's process}$

Catalyst	Process
$A. TiCl_4$	$i. \text{Wacker process}$
$B. PdCl_2$	$ii. \text{Ziegler-Natta polymerization}$
$C. CuCl_2$	$iii. \text{Contact process}$
$D. V_2O_5$	$iv. \text{Deacon's process}$