1301. Which of the following is super-cooled liquid ?
A. Ice
B. Table salt
C. Glass *
D. Iodine
1302. Total numbers of crystal systems and number of Brava is latices are respectively :
A. 7,7
B. 7,14 *
C. 14,14
D. 14,7
1303. Among the following unit cell Which has highest symmetry :
A. Cubic *
B. Monoclinic
C. Triclinic
D. Rhombic
1304. Total number of mirror planes in cubic crystals are :
A. 1
B. 3
C. 9 *
D. 14
1305. Types of rotation axis in cubic crystal are :
A. 1
B. 3 *
C. 9
D. 14
1306. Cubic crystal has four fold rotation axes :
A. 1
B. 3 *
C. 9
D. 14
1307. If a,b,c are equal and a,b,y are equal to 90 degree centigrade . it represents :
A. Cubic crystal *
B. Tetragonal crystal
C. Monoclinic crystal
D. All
1308. What is the contribution of the atom present at the edge of cube :
A. 1/2
B. 1/4 *
C. 1/8
D. 1/3
1309. Contribution of atom present at face of cube :
A. 1/2 *
B. 1/4
C. 2/8
D. 1/3
1310. Which of the following will conduct electric current in solid states :
A. Graphite *
B. Diamond
C. Sodium Chloride
D. Iodine