Question

Nano size of gold has _______ colour.
A. yellow
B. red
C. pink
D. orange

Answer 1

A) yellow

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Answer 2

Answer:

RED

Explanation:

Nano size of gold has _______ colour.

A. yellow  

B. red

C. pink  

D. orange

RED is the correct answer

Nano size of Gold absorb light in the blue-green portion of the spectrum (~450 nm) while red light (~700 nm) is reflected which results in a rich red color.

Hence Nano size of gold has RED colour.