Top 20 Science Chemistry Questions And Answers || Science Chemistry GK || Chemistry Quiz
1. Which metal is found maximum on earth ?
a) Sodium
b) Calcium
c) Iron
d) Aluminium
2. The metal which of lighter than water is-
a) Aluminium
b) Silver
c) Sodium
d) Mercury
3. An electron carries-
a) a unit negative charge
b) no charge
c) two units of negative charge
d) a unit positive charge
4. Chemical properties of an atom are determined by its-
a) atomic weight
b) atomic number
c) number of isotopes
d) binding energy
5. The number of valence electrons in carbon atom-
a) 0
b) 4
c) 2
d) 6
6. When metal is heated, the density of metal ?
a) Increases
b) Remains the same
c) Decreases
d) None of these
7. Which metal is stored in kerosene oil ?
a) Potassium
b) Sodium
c) Calcium
d) Aluminium
8. Which of the following is a metal ?
a) Mercury
b) Phosphorus
c) Sulphur
d) None of these
9. Hydrochloric acid reacts with metals to produce-
a) H₂
b) Cl₂
c) CO₂
d) O₂
10. Bauxite is the ore of which metal ?
a) Fe
b) Al
c) Cu
d) Mg
11. Name the metal which is found in liquid state at room temperature ?
a) Silicon
b) Soda water
c) Mercury
d) Iron
12. Most of the metals makes_______ on burning in a presence of oxygen-
a) Oxides
b) Chloride
c) Dioxide
d) Nitrite
13. The combination of a metal with another metal or a non metal is known as-
a) Flux
b) Matrix
c) Alloy
d) None of these
14. Argentite is an ore of which metal ?
a) Hg
b) Mg
c) Ag
d) None of these
15. What will be produced by the reaction of metals with hydrochloric acid ?
a) Hydrogen
b) Chlorine
c) Carbon dioxide
d) Oxygen
16. Which is the purest form of Iron ?
a) Cast Iron
b) Wrought Iron
c) Steel
d) None of these
17. Brass is an alloy of______and_____.
a) copper and tin
b) copper and zinc
c) copper and iron
d) None of these
18. Which of the following is a chemical change ?
a) Burning of coal
b) Melting of Ice
c) Breaking of glass
d) Evaporisation of water
19. Which of the following is chemical change ?
a) Melting of iron
b) Rusting of iron
c) Bending of iron
d) None of these
20. The process of direct change from solid to vapor is known as ?
a) Vaporization
b) Sublimation
c) Condensation
d) None of these
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