MHT CET 2023 Chemistry question

Not in JEE or NEET syllabus

Which statement from following about nano material is NOT correct?

(A)A 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 metalCorrect
(D)Carbon nanotube can act as electrical conductor

Answer: (C)

Solution

As particle size decreases the surface-area-to-volume ratio increases, so the total surface area of a given mass increases (a is correct). This large surface area makes nano-catalysts much more active (b is correct). Carbon nanotubes can conduct electricity (metallic nanotubes)

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Question ID VK-097884