Phosphorous
Bromine
Chlorine
Helium
✅ The correct answer is option B.
General Science MCQs
2. Chlorophyll is a naturally occurring chelate compound in which central metal is
copper
magnesium
iron
calcium
✅ The correct answer is option B.
3. Which of the following metals forms an amalgam with other metals?
Tin
Mercury
Lead
Zinc
✅ The correct answer is option B.
4. Which of the following is used in pencils?
Graphite
Silicon
Charcoal
Phosphorous
✅ The correct answer is option A.
5. Brass gets discoloured in air because of the presence of which of the following gases in air?
Oxygen
Hydrogen sulphide
Carbon dioxide
Nitrogen
✅ The correct answer is option B.
6. Deep blue colour is imparted to glass by the presence of
A. cupric oxide
B. nickel oxide
C. cobalt oxide
D. iron oxide
✅ The correct answer is option C.
7. How many colours the sunlight spectrum has?
A. Three
B. Seven
C. Four
D. Five
✅ The correct answer is option B.
8. Nuclear fission is caused by the impact of
A. neutron
B. proton
C. deuteron
D. electron
✅ The correct answer is option A.
9. Gypsum is added to cement clinker to
A. increase the tensile strength of cement
B. decrease the rate of setting of cement
C. facilitate the formation of colloidal gel
D. bind the particles of calcium silicate
✅ The correct answer is option B.
10. Soap is a mixture of sodium or potassium salts of
A. dicarboxylic acids
B. monocarboxylic acids
C. glycerol
D. tricarboxylic acids
✅ The correct answer is option B.