Diamond is the hardest solid because: i. sp^3 hybridization; ii. C-C bond is the

Question

Diamond is the hardest solid because: i. sp^3 hybridization; ii. C-C bond is the shortest of any solid; iii. C atmons are closest packed in the crystal; iv. All of the above. f. Bonding in the following solids is ionic: i. Ag ii. CaCO_3 iii. Si iv. SiC g. The angle between directions in a fee solid is: i. 0 degree; ii. 45 degree; iii. 90 degree; iv. 120 degree. h. Angle between the (11-20) and (1-100) planes in hcp crystal structure is: i. 0 degree; ii. 45 degree; iii. 90 degree; iv. 120 degree. i. Diffusion of an atomic species in a solid takes place: i. From the high concentration towards the low concentration; ii. From the low concantretaion to the high concentration; iii. From high heat to low heat; iv. From the low density atomic packing to high density atomic packing material.

Explanation / Answer

e. Diamond is the hardest solid because,

i. sp3 hybridization

g. The angle between <110> directionin a fcc solid is,

iii. 90 o

h. Angle between (11-20) and (1-100) planes in hcp crystal structure is,

iv. 120 o

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