Diamond is harder than Graphite because of___________?

A. Difference in crystalline Structure
B. Tetrahedral structure of diamond
C. Difference in layer of atoms
D. None of these

Submitted by: Malik Asghar Hussain

Carbon,Diamond and Graphite are together called:___________?
A. Allotrope B. Isomers C. Isomorphs D. Isotopes Submitted by: Fahad Mehsud...
Diamond is an allotropic form of_______?
A. Carbon B. Hydrogen C. Nitrogen D. Silicon...
Diamond is a very expensive ornament. It is composed of a single element ___________?
A. Carbon B. Gold C. Silver D. Platinum E. None of these...
The luster of diamond is due to_________?
A. Reflection B. Total internal reflection C. Refraction D. None of these Submitted by: Afzal Chaudhry...
Black gold is an oil; Black diamond is_________?
A. Copper B. Iron C. Coal D. Wood Submitted by: Mansoor Ahmed Suhag...
Entomology Is the Study of___________?
A. worms B. insects C. Animals D. All of these Submitted by: Raza Talpur...
Reflex actions in head region are under the control of___________?
A. Brain B. Spinal cord C. both a & b D. non of the above Submitted by: Umar Hayat...
Eletromagneticism is the branch of___________?
A. Chemistry B. Physics C. Both D. None of these Submitted by: Sadam...
Disease beri beri is because of___________?
A. Lack of green vegetables in diet B. Use of milled rice C. Deficiency of calcium in bones D. Poor use of citrus fruits Submitted by: Irum perveen...
Our atmosphere consists of___________ Oxygen approximately?
A. 11% Oxygen approximately B. 21% Oxygen approximately C. 31% Oxygen approximately D. None of these Submitted by: Ameer Ali Mirani...