111 direction is perpendicular to 111 to 111 plane parallel

[111] direction is perpendicular to (111) to (111) plane parallel to (111) plane Grain boundaries are: point defects surface defects two dimensional defects both B and C Crystal structure of graphite is hexagonal close pack hexagonal diamond form of FCC cubic Two types of dislocations are: interstitial and subsitutional FCC and BCC Edge and screw None of the above Atomic packing factor is Distance between two adjacent atoms Projected area fraction of atoms on a plane Volume fraction of atoms in cell None Coordination number in simple cubic crystal structure 1 2 6 3 Which one of the following is not a strong bond? Ionic bond Covalent bond Metallic bond Van der Waals bond Repeatable entity of a crystal structure is known as Crystal Lattice Unit cell Miller indices Water molecule is

Solution

30- A

31- B

32- B

33- C

34- C

35- C
36- A

37- C