no mcq will come out of this in the exams...!

1. Chapter 4
Periodicity of Elements
“People are bad enough to tease you but I am
sure you are good enough to forgive them”
1. law of triads was proposed by:
a) Doberinier b) Lother Mayer
c) Newland d) Mendeleef
2. Modern classification is based on atomic
number.
a) true b) false
3. law of octaves was proposed by:
a) Doberinier b) Lother Mayer
c) Newland d) Mendeleef
4. Mg being eighth element from Be has the
similar properties with it. The statement comes
from:
a) law of octaves b) law of triads
c) Lother Mayer’s classification
d) Mendeelev’s periodic table
5. atomic volume = ?
a) gram atomic Weight * density
b) gram atomic Weight / density
c) gram atomic weight + density

2. d) gram atomic weight – density
6. Mendeleev arranged the elements in order of
increasing:
a) atomic volume b) atomic mass
c) atomic number d) periodicity
7. Mendeleev’s periodic table was remarkable in
having:
a) columns b) rows
c) both d) gaps for unknown
elements
8. Mendeleev’s periodic table failed to give the
idea of atomic structure.
a) true b) false
9. regarding the periodic table the incorrect
statement is:
a) rows have similar properties
b) it does not contain isotopes
c) shows the periodicity of elements
d) N.O.T
10. Eka boran was later termed as:
a) boron b) scandium
c) gallium d) germanium
11. …..proved atomic mass not as the fundamental
property of elements:
a) radioactivity b) isotopes
c) electronic configurationd) periodicity

3. 12. atomic number was discovered by:
a) doberinier b) newland
c) baquerel d) mosely
13. the longest period is:
a) first b) second
c) sixth d) seventh
14. the sixth period contains:
a) 6 b) 8
c) 16 d) 32
15. the elements of sub group A are called transition
elements.
a) true b) false
16. group 1A and 2A contain alkali metals:
a) true b) false
17. the most stable of the following elements is:
a) Na b) N2
c) Ni d) Ne
18. the most reactive is:
a) Na b) Mg
c) Na+ d) F
19. The valency of seventh A group is :
a) +1 b)-1
c) +2 d)-2
20. boron is metalloid:
a) true b) false.

4. 21. it exists in tetameric form:
a) K b) P
c) N d) Sb
22. inert or noble gases are placed in the group:
a) 3A b) 4A
c) 7A d) 8A
23. electronegativity of fluorine is:
a) 1 b) 2
c) 3 d) 4
24. the minimum energy required to remove an
electron from an atom in gaseous state is called:
a) electronegativity b) electron affinity
c) ionization potential d) P.E
25. 1Å = ?
a)10-8 b) 10-9
c)10-7 d) 10-10
26. atomic number depends upon the number of
shells but does not depend upon the nuclear
charge.
a) true b) false
27. the energy change that occurs when an electron
is gained by an atom in gaseous state is called:
a) electron affinity b) ionization potential
c) enthalpy d) electronegativity

5. 28. the relative tendency of an atom in a molecule
to attract shared pair of electrons towards itself
is called:
a) electron affinity b) ionization potential
c) enthalpy d) electronegativity
29. electronegativity decreases down the group.
a) true b) false
30. the incomplete period is:
a) first b) fourth
c) sixth d) seventh
31. which period contains only gases
a) first b) fourth
c) sixth d) seventh
32. it is the radioactive element of 1A group.
a) Li b) Rb
c) Cs d) Fr
33. the valency of alkaline earth metals is:
a) +1 b) +2
c) -1 d) -2
34. N and P are non metals.
a) true b) false
35. which pair of elements is chemically similar:
a) K, Cr b) Cu, Ca
c) F, Cl d) N, O

6. ANS KEY
1 A 2 A 3 C
4 A 5 B 6 B
7 D 8 A 9 A
10 B 11 A 12 D
13 C 14 D 15 B
16 B 17 D 18 C
19 B 20 A 21 B
22 D 23 D 24 C
25 A 26 B 27 A
28 D 29 A 30 D
31 A 32 D 33 B
34 A 35 C