1. Instruments used for separation of isotopes are known as
a) mass spectrographs
b) atomic spectrographs
c) molecular spectrographs
d) All of the above
ans. a
2. Unit of plank's constant is
a) erg sec
b) joules
c) joules/sec
d) erg/sec
ans. d
3. A set of four quantum numbers describe
a) energy level only
b) energy state only
c) energy level and energy state
d) All of these
ans. b
4. The capacity of a single orbital is
a) 2
b) 6
c) 10
d) 18
ans. a
5. The atomic number of the element whose outermost electron fills the 3s shell is
a) 8
b) 12
c) 18
d) none of these
ans. b
6. In the modern Periodic Table, elements are arranged in order of increasing
a) atomic weight
b) atomic number
c) molecular weight
d) none of these
ans. b
7. Avagadro's number is the number of
a) atoms in one gram mole
b) molecules in one gram mole
c) both A and B are correct
d) all of these
ans. b
8. Ionic bonding in solids depends primiarily on
a) electrical dipoles
b) sharing electrons
c) transfer of electrons
d) all of these
ans. c
9. The nature of atomic bond found in diamond is
a) ionic
b) covalent
c) metallic
d) all of these
ans. b
10. Which of the following material does not have covalent bonds?
a) metal
b) organic polymers
c) silicon
d) all of these
ans. a
a) mass spectrographs
b) atomic spectrographs
c) molecular spectrographs
d) All of the above
ans. a
2. Unit of plank's constant is
a) erg sec
b) joules
c) joules/sec
d) erg/sec
ans. d
3. A set of four quantum numbers describe
a) energy level only
b) energy state only
c) energy level and energy state
d) All of these
ans. b
4. The capacity of a single orbital is
a) 2
b) 6
c) 10
d) 18
ans. a
5. The atomic number of the element whose outermost electron fills the 3s shell is
a) 8
b) 12
c) 18
d) none of these
ans. b
6. In the modern Periodic Table, elements are arranged in order of increasing
a) atomic weight
b) atomic number
c) molecular weight
d) none of these
ans. b
7. Avagadro's number is the number of
a) atoms in one gram mole
b) molecules in one gram mole
c) both A and B are correct
d) all of these
ans. b
8. Ionic bonding in solids depends primiarily on
a) electrical dipoles
b) sharing electrons
c) transfer of electrons
d) all of these
ans. c
9. The nature of atomic bond found in diamond is
a) ionic
b) covalent
c) metallic
d) all of these
ans. b
10. Which of the following material does not have covalent bonds?
a) metal
b) organic polymers
c) silicon
d) all of these
ans. a
