Copper is used in making of:
- (A) Brick kilns
- (B) Children toys
- (C) Electric wires
- (D) Kitchen utilities
- (C) Electric wires
What is used in making artificial sweetener saccharine?
- (A) Phenol
- (B) Aniline
- (C) Toluene
- (D) Benzene
- (C) Toluene
What color is the gemstone “Peridot” has?
- (A) White
- (B) Blue
- (C) Green
- (D) Black
- (C) Green
_______ molecule contains a carbon carbon double bond.
- (A) Ethane
- (B) Ethene
- (C) Ethyl
- (D) Ethylene
- (B) Ethene
Which of the following is NOT known as greenhouse gas?
- (A) Methane
- (B) CFC
- (C) Nitrous oxide
- (D) Carbon dioxide
- (C) Nitrous oxide
What is “Bromine”?
- (A) Colorless gas
- (B) Inflammable gas
- (C) A red liquid
- (D) Fully black solid
- (C) A red liquid
Permanent hardness of water, due to sulfates of metal, can be destroyed by using:
- (A) Nitrates
- (B) Zeolites
- (C) Sulfonates
- (D) Phosphate
- (B) Zeolites
The location and energy of an electron in an atom can be specified by:
- (A) Atomic number
- (B) Atomic mass
- (C) Quantum number
- (D) Quantum mass
- (C) Quantum number
In an atomic nucleus, neutrons and protons are held together by:
- (A) Exchange force
- (B) Magnetic force
- (C) Columbic force
- (D) Gravitational force
- (A) Exchange force
Which of the following is commonly called a polyamide?
- (A) Orion
- (B) Rayon
- (C) Nylon
- (D) Ethylene
- (C) Nylon
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