Which of the following is used in beauty parlors for hair setting?
A. Silicon
B. Chlorine
C. Sulphur
D. Phosphorus
Which of the following is not a chemical reaction?
A. Burning of coal
B. Conversion of water into steam
C. Digestion of food
D. Burning of paper
Isotopes of an element have the same number of _______?
A. Neutrons
B. Protons
C. Electrons
D. Beta rays
Substance whose atoms can be split are known as __________ materials.
A. Fusionable
B. Fissionable
C. Combustible
D. None of these
“Green House Effect” means:____________?
A. Pollution
B. Prevention of ultraviolet rays
C. Trapping of Solar energy due to atmospheric carbon dioxide
D. None
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
A colloidal system in which a liquid is dispersed into a liquid is called_________?
A. Percipitate
B. Gel
C. Emulsion
D. Sol
___________ is a strong smelling agent added to LPG cylinders to detect leakage?
A. Nitrogen Peroxide
B. Ethyl Mercaptan
C. Carbon Monoxide
D. Sulphur Dioxide