301. The solution remaining after the formation of crystals is called ___________________?
A. Mother liquor
B. Dilute solution
C. Residue
D. both A & B

302. Which is artificial manmade fiber?
A. Boron
B. Saffron
C. Rayon
D. None of these

303. According to Journal of Biological Chemistry 158, human brain and heart are composed of ________water?
A. 75%
B. 81%
C. 73%
D. 89%

304. Carbon,Diamond and Graphite are together called:___________?
A. Allotrope
B. Isomers
C. Isomorphs
D. Isotopes

305. Actinides are the elements with atomic number from:
A. 97 to 104
B. 101 to 115
C. 89 to 103
D. 36 to 43

306. Reading of a Barometer going down is an indication of:___________?
A. Snow
B. Storm
C. Intense heat
D. Rainfall

307.  A helium nucleus comprising of two protons and two neutrons with a charge of 2e is _________ ?
A. Beta particle
B. Gamma particle
C. Alpha particle
D. Negative particle

308. In SI base units, 1 Bq is equal to __________ ?
A. 10 disintegration per second
B. 1.5 disintegration per second
C. 0.01 disintegration per second
D. 1 disintegration per second

309. Chromatography is used to separate _________ ?
A. Solution
B. Mixtures
C. Molecules
D. Atoms

310. In a group, atomic radii increase due to successive increase of _________ ?
A. Electronic shells
B. Proton shells
C. Neutron shells
D. Nucleus