Question

A brief information about a few substances is given as :

P) Hard, insoluble in water, lower density than water, opaque

Q) Shiny, opaque, higher density than water, smooth to touch

R) Hard, transparent, insoluble in water, higher density than water

S) Non-lustrous, lower density than water, bad conductor of heat and electricity

P, Q, R and S could be respectively​

Answer 1

Answer:

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