1. To explain fine structure of the spectrum of the hydrogen atom we must consider:
a) The presence of neutrons in the nucleus
b) Finite size of the nucleus
c) Orbital angular momentum
d) Spin angular momentum
e) Nucleus size
2. According to the Bohr model of the hydrogen atom, radiation is emitted when the electron:
a) Jumps from an orbit to the nucleus
b) Is charged
c) Jumps from a larger orbit to a smaller orbit
d) Jumps from a smaller orbit to a larger orbit
e) Revolves in an orbit
3. For given value of n, the maximum number of electrons in an orbit can be:
a) 12
b) n2
c) n
d) 24
e) 2 n2
4. The speed of an electron in the orbit of a hydrogen atom in the ground state is:
a) c/137
b) c/2
c) c/10
d) c/27
e) None of the above
5. Darwin referred to a single, simple progenitor as:
a) Man’s last common ancestor
b) Life’s first common ancestor
c) Life’s last common ancestor
d) Man’s first common ancestor
e) None of the above
6. Light from a distant star is examined with a spectroscope. The spectrum shows:
a) Temperature of star
b) Chemical composition of a star
c) Distance of star from the earth
d) Both (a) and (b)
e) All of the above
7. Fraunhoffer lines in the solar spectrum correspond to radiation:
a) Emitted by stars
b) Emitted by the inner part of the sun but absorbed by its outer atmosphere
c) Not emitted by the sun
d) Emitted by the sun but absorbed by the earth’s atmosphere
e) Not absorbed due to imperfect instruments
8. The bird Charles Darwin studied and used to influence his research in natural selection was the:
a) Eagle
b) Puffin
c) Dipper
d) Finch
e) Crane
9. Which of the following are NOT social insects?
a) Wasps
b) Spiders
c) Ants
d) Bees
e) Termites
10. What is produced, on heating a mixture of potassium cyanate and ammonium chloride?
a) Methanamide
b) Ethanamide
c) Potassium chloride
d) Ethanimine
e) Urea
11. Cofactors that are nonprotein organic molecules are called:
a) Inhibitors
b) Ions
c) Coenzymes
d) Substrates
e) None of the above
12. Which of the following terms is used to define atoms of different elements, which contain the same number of neutrons?
a) Isobars
b) Isotones
c) Isomers
d) Isotopes
e) None of the above
13. General electronic configuration for d-block elements is:
a) (n-1)d1-10ns0-2
b) (n-1)d1-5ns1-2
c) (n-1)d1-10ns1-2
d) (n-1)d1-5ns1-1
e) None of the above
14. Which of the following alkali metal halides has the lowest lattice energy?
a) CsI
b) NaCl
c) LiF
d) KBr
e) Cacl
15. Metal ions like Ag+, Cu2+ etc, act as:
a) Lewis base
b) Bronsted acids
c) Bronsted base
d) Lewis acids
e) None of the above
16. The oxidation number of oxygen in 0F2 is:
a) +1
b) -2
c) +2
d) -1
e) 1
1.D
2.C
3.E
4.A
5.C
6.A
7.B
8.D
9.B
10.E
11.C
12.B
13.A
14.A
15.D
16.C
