(d) Sulphuric acid
Ans: (d)
11. The modern system of symbols was evolved by
    (a) Dalton
    (b) Cavendish
    (c) Avogadro
    (d) Berzelius
Ans: (d)
12. The neutron was discovered by
    (a) Chadwick
    (b) Madam Curie
    (c) Becquerel
    (d) Aston
Ans: (a)
13. A mixture of ethyl alcohol and water can be separated by
    (a) evaporation
    (b) sublimation
    (c) using a separating funnel
    (d) fractional distillation
Ans: (d)
14. The Long Form of the Periodic Table is based on
    (a) atomic number
    (b) valency
    (c) atomic mass
    (d) atomic radius
Ans: (a)
15. The term "nucleons" apples to
    (a) neutrons
    (b) protons
    (c) protons and neutrons
    (d) protons and electrons
Ans: (c)
16. Isotopes differ in the number of
    a) Protons
    b) Neutrons
    c) Electrons
    d) Protons and electrons
Ans: (b)
17. Radium was isolated from
    (a) galena
    (b) dolomite
    (c) sylvine
    (d) pitchblende
Ans: (d)
18. Real gases tend to become ideal Under
    (a) low pressure and high temperature
    (b) low pressure and low temperature
    (c) high pressure and low temperature
    (d) high pressure and high temperature
Ans: (a)
19. The Combined Gas Law equation is
    (a) P1V1T1 = P2 V2 T2
    (b) P1V1T2 = P2V2T1
    (c) P = P1 + P2 + P3
    (d) C =
Ans: (b)
20. The value of Avogadro Number is
    (a) 6.023 x 1022
    (b) 1 x 10-14
    (c) cl 6.056 x 10-6