App Logo

No.1 PSC Learning App

1M+ Downloads
Which of the following is hardest rock?

AMarble

Bdiamond

Ctale

Dquartz

Answer:

D. quartz


Related Questions:

Final setting time of ordinary Portland cement is
In which of the following directions, the strength of timber is maximum?
Compressive strength of cement, after 7 days not less than.......................kg/cm^2:
Efflorescence is seen on the bricks which are made from the soil containing too much of:
The volume of 50 kg of cement bag is