Classification of Elements & Periodicity Practice Questions - DPP for NEET

 Page 1


PART-I (Single Correct MCQs)
1. The correct sequence which shows decreasing order of the ionic radii of
the elements is
(a)
(b)
(c)
(d)
2. Arrange the following in increasing order of ionic radii?  C
4–
,N
3–
,F
–
,O
2–
(a) C
4–
 < N
3–
 < O
2–
 < F
–
(b) N
3–
 < C
4–
 < O
2– 
< F
–
(c) F
–
< O
2–
 < N
3–
 < C
4–
(d) O
2–
 < F
–
 < N
3–
 < C
4–
3. Which is not the correct order for the stated property.
(a) Ba > Sr > Mg ; atomic radius
Page 2


PART-I (Single Correct MCQs)
1. The correct sequence which shows decreasing order of the ionic radii of
the elements is
(a)
(b)
(c)
(d)
2. Arrange the following in increasing order of ionic radii?  C
4–
,N
3–
,F
–
,O
2–
(a) C
4–
 < N
3–
 < O
2–
 < F
–
(b) N
3–
 < C
4–
 < O
2– 
< F
–
(c) F
–
< O
2–
 < N
3–
 < C
4–
(d) O
2–
 < F
–
 < N
3–
 < C
4–
3. Which is not the correct order for the stated property.
(a) Ba > Sr > Mg ; atomic radius
(b) F > O > N ; first ionization enthalpy
(c) Cl > F > I ; electron affinity
(d) O > Se > Te ; electronegativity
4. In which of the following arrangements, the order is NOT according to
the property indicated against it?
(a) Li < Na < K < Rb :
Increasing metallic radius
(b) I < Br < F < Cl :
Increasing electron gain enthalpy
(with negative sign)
(c) B < C < N < O
Increasing first ionization enthalpy
(d)
Increasing ionic size
5. Sequence of acidic character is
(a) N
2
O
5
 > SO
2
 > CO > CO
2
(b) N
2
O
5
 > SO
2
 > CO
2
 > CO
(c) SO
2
 > CO
2
 > CO > N
2
O
5
(d) SO
2
 > N
2
O
5
 > CO > CO
2
6. Which of the following order is wrong?
(a) NH
3
 < PH
3
 < AsH
3
 – Acidic
(b) Li < Be < B < C – First IP
(c) Al
2
O
3
 < MgO < Na
2
O < K
2
O – Basic
(d) Li
+
 < Na
+
 < K
+
 < Cs
+
 – Ionic radius
7. The incorrect statement among the following is
(a) The first ionization potential of Al is less than the first ionization
potential of Mg
(b) The second ionization potential of Mg is greater than the second
ionization potential of Na
Page 3


PART-I (Single Correct MCQs)
1. The correct sequence which shows decreasing order of the ionic radii of
the elements is
(a)
(b)
(c)
(d)
2. Arrange the following in increasing order of ionic radii?  C
4–
,N
3–
,F
–
,O
2–
(a) C
4–
 < N
3–
 < O
2–
 < F
–
(b) N
3–
 < C
4–
 < O
2– 
< F
–
(c) F
–
< O
2–
 < N
3–
 < C
4–
(d) O
2–
 < F
–
 < N
3–
 < C
4–
3. Which is not the correct order for the stated property.
(a) Ba > Sr > Mg ; atomic radius
(b) F > O > N ; first ionization enthalpy
(c) Cl > F > I ; electron affinity
(d) O > Se > Te ; electronegativity
4. In which of the following arrangements, the order is NOT according to
the property indicated against it?
(a) Li < Na < K < Rb :
Increasing metallic radius
(b) I < Br < F < Cl :
Increasing electron gain enthalpy
(with negative sign)
(c) B < C < N < O
Increasing first ionization enthalpy
(d)
Increasing ionic size
5. Sequence of acidic character is
(a) N
2
O
5
 > SO
2
 > CO > CO
2
(b) N
2
O
5
 > SO
2
 > CO
2
 > CO
(c) SO
2
 > CO
2
 > CO > N
2
O
5
(d) SO
2
 > N
2
O
5
 > CO > CO
2
6. Which of the following order is wrong?
(a) NH
3
 < PH
3
 < AsH
3
 – Acidic
(b) Li < Be < B < C – First IP
(c) Al
2
O
3
 < MgO < Na
2
O < K
2
O – Basic
(d) Li
+
 < Na
+
 < K
+
 < Cs
+
 – Ionic radius
7. The incorrect statement among the following is
(a) The first ionization potential of Al is less than the first ionization
potential of Mg
(b) The second ionization potential of Mg is greater than the second
ionization potential of Na
(c) The first ionization potential of Na is less than the first ionization
potential of Mg
(d) The third ionization potential of Mg is greater than the third ionization
potential of Al.
8. According to the Periodic Law of elements, the variation in properties
of elements is related to their
(a) nuclear masses
(b) atomic numbers
(c) nuclear neutron-proton number ratios
(d) atomic masses
9. Identify the correct order of the size of the following:
(a) Ca
2+
 < K
+
 < Ar < Cl
–
 < S
2–
(b) Ar < Ca
2+
 < K
+
 < Cl
–
 < S
2–
(c) Ca
2+
 < Ar < K
+
 < Cl
–
 < S
2–
(d) Ca
2+
 < K
+
 < Ar < S
2–
 < Cl
–
10. Following statements regarding the periodic trends of chemical
reactivity of the alkali metals and the halogens are given. Which of
these statements gives the correct picture?
(a) Chemical reactivity increases with increase in atomic number down the
group in both the alkali metals and halogens
(b) In alkali metals the reactivity increases but in the halogens it decreases
with increase in atomic number down the group
(c) The reactivity decreases in the alkali metals but increases in the
halogens with increase in atomic number down the group
(d) In both the alkali metals and the halogens the chemical reactivity
decreases with increase in atomic number down the group
11. In which of the following arrangements, the sequence is not strictly
according  to the property written against it?
(a) HF < HCl < HBr , HI : increasing acid strength
(b) NH
3
 < PH
3
 < AsH
3
 <SbH
3 
: increasing basic strength
(c) B < C < O < N : increasing first ionization enthalpy
Page 4


PART-I (Single Correct MCQs)
1. The correct sequence which shows decreasing order of the ionic radii of
the elements is
(a)
(b)
(c)
(d)
2. Arrange the following in increasing order of ionic radii?  C
4–
,N
3–
,F
–
,O
2–
(a) C
4–
 < N
3–
 < O
2–
 < F
–
(b) N
3–
 < C
4–
 < O
2– 
< F
–
(c) F
–
< O
2–
 < N
3–
 < C
4–
(d) O
2–
 < F
–
 < N
3–
 < C
4–
3. Which is not the correct order for the stated property.
(a) Ba > Sr > Mg ; atomic radius
(b) F > O > N ; first ionization enthalpy
(c) Cl > F > I ; electron affinity
(d) O > Se > Te ; electronegativity
4. In which of the following arrangements, the order is NOT according to
the property indicated against it?
(a) Li < Na < K < Rb :
Increasing metallic radius
(b) I < Br < F < Cl :
Increasing electron gain enthalpy
(with negative sign)
(c) B < C < N < O
Increasing first ionization enthalpy
(d)
Increasing ionic size
5. Sequence of acidic character is
(a) N
2
O
5
 > SO
2
 > CO > CO
2
(b) N
2
O
5
 > SO
2
 > CO
2
 > CO
(c) SO
2
 > CO
2
 > CO > N
2
O
5
(d) SO
2
 > N
2
O
5
 > CO > CO
2
6. Which of the following order is wrong?
(a) NH
3
 < PH
3
 < AsH
3
 – Acidic
(b) Li < Be < B < C – First IP
(c) Al
2
O
3
 < MgO < Na
2
O < K
2
O – Basic
(d) Li
+
 < Na
+
 < K
+
 < Cs
+
 – Ionic radius
7. The incorrect statement among the following is
(a) The first ionization potential of Al is less than the first ionization
potential of Mg
(b) The second ionization potential of Mg is greater than the second
ionization potential of Na
(c) The first ionization potential of Na is less than the first ionization
potential of Mg
(d) The third ionization potential of Mg is greater than the third ionization
potential of Al.
8. According to the Periodic Law of elements, the variation in properties
of elements is related to their
(a) nuclear masses
(b) atomic numbers
(c) nuclear neutron-proton number ratios
(d) atomic masses
9. Identify the correct order of the size of the following:
(a) Ca
2+
 < K
+
 < Ar < Cl
–
 < S
2–
(b) Ar < Ca
2+
 < K
+
 < Cl
–
 < S
2–
(c) Ca
2+
 < Ar < K
+
 < Cl
–
 < S
2–
(d) Ca
2+
 < K
+
 < Ar < S
2–
 < Cl
–
10. Following statements regarding the periodic trends of chemical
reactivity of the alkali metals and the halogens are given. Which of
these statements gives the correct picture?
(a) Chemical reactivity increases with increase in atomic number down the
group in both the alkali metals and halogens
(b) In alkali metals the reactivity increases but in the halogens it decreases
with increase in atomic number down the group
(c) The reactivity decreases in the alkali metals but increases in the
halogens with increase in atomic number down the group
(d) In both the alkali metals and the halogens the chemical reactivity
decreases with increase in atomic number down the group
11. In which of the following arrangements, the sequence is not strictly
according  to the property written against it?
(a) HF < HCl < HBr , HI : increasing acid strength
(b) NH
3
 < PH
3
 < AsH
3
 <SbH
3 
: increasing basic strength
(c) B < C < O < N : increasing first ionization enthalpy
(d) CO
2
 < SiO
2
 < SnO
2
 < PbO
2 
: increasing oxidising power
12. Which of the following order is wrong?
(a) NH
3
 < PH
3
 < AsH
3
 — Acidic
(b)
(c)
(d)
13. Which one of the following arrangements represents the correct order of
least negative to most negative electron gain enthalpy for C, Ca, Al, F
and O?
(a) Ca < Al < C < O < F
(b) Al < Ca < O < C < F
(c) Al < O < C < Ca < F
(d) C < F < O < Al < Ca
14. Which of the following elements represents highly electropositive as
well as highly electronegative character in its period?
(a) Hydrogen
(b) Nitrogen
(c) Fluorine
(d) None of these
15. Among Al
2
O
3
, SiO
2
, P
2
O
3
 and SO
2
 the correct order of acid strength is
(a) Al
2
O
3
 < SiO
2
< SO
2
 < P
2
O
3
(b) SiO
2
< SO
2
 < Al
2
O
3
 <  P
2
O
3
(c) SO
2
<  P
2
O
3 
< SiO
2
 < Al
2
O
3
(d) Al
2
O
3 
< SiO
2
<  P
2
O
3 
< SO
2
16. Which of the following arrangements represents the increasing order
(smallest to largest) of ionic radii of the given species O
2–
, S
2–
, N
3–
, P
3–
?
(a) O
2–
 < N
3–
 < S
2–
 < P
3–
(b) O
2–
 < P
3–
 < N
3–
 < S
2–
Page 5


PART-I (Single Correct MCQs)
1. The correct sequence which shows decreasing order of the ionic radii of
the elements is
(a)
(b)
(c)
(d)
2. Arrange the following in increasing order of ionic radii?  C
4–
,N
3–
,F
–
,O
2–
(a) C
4–
 < N
3–
 < O
2–
 < F
–
(b) N
3–
 < C
4–
 < O
2– 
< F
–
(c) F
–
< O
2–
 < N
3–
 < C
4–
(d) O
2–
 < F
–
 < N
3–
 < C
4–
3. Which is not the correct order for the stated property.
(a) Ba > Sr > Mg ; atomic radius
(b) F > O > N ; first ionization enthalpy
(c) Cl > F > I ; electron affinity
(d) O > Se > Te ; electronegativity
4. In which of the following arrangements, the order is NOT according to
the property indicated against it?
(a) Li < Na < K < Rb :
Increasing metallic radius
(b) I < Br < F < Cl :
Increasing electron gain enthalpy
(with negative sign)
(c) B < C < N < O
Increasing first ionization enthalpy
(d)
Increasing ionic size
5. Sequence of acidic character is
(a) N
2
O
5
 > SO
2
 > CO > CO
2
(b) N
2
O
5
 > SO
2
 > CO
2
 > CO
(c) SO
2
 > CO
2
 > CO > N
2
O
5
(d) SO
2
 > N
2
O
5
 > CO > CO
2
6. Which of the following order is wrong?
(a) NH
3
 < PH
3
 < AsH
3
 – Acidic
(b) Li < Be < B < C – First IP
(c) Al
2
O
3
 < MgO < Na
2
O < K
2
O – Basic
(d) Li
+
 < Na
+
 < K
+
 < Cs
+
 – Ionic radius
7. The incorrect statement among the following is
(a) The first ionization potential of Al is less than the first ionization
potential of Mg
(b) The second ionization potential of Mg is greater than the second
ionization potential of Na
(c) The first ionization potential of Na is less than the first ionization
potential of Mg
(d) The third ionization potential of Mg is greater than the third ionization
potential of Al.
8. According to the Periodic Law of elements, the variation in properties
of elements is related to their
(a) nuclear masses
(b) atomic numbers
(c) nuclear neutron-proton number ratios
(d) atomic masses
9. Identify the correct order of the size of the following:
(a) Ca
2+
 < K
+
 < Ar < Cl
–
 < S
2–
(b) Ar < Ca
2+
 < K
+
 < Cl
–
 < S
2–
(c) Ca
2+
 < Ar < K
+
 < Cl
–
 < S
2–
(d) Ca
2+
 < K
+
 < Ar < S
2–
 < Cl
–
10. Following statements regarding the periodic trends of chemical
reactivity of the alkali metals and the halogens are given. Which of
these statements gives the correct picture?
(a) Chemical reactivity increases with increase in atomic number down the
group in both the alkali metals and halogens
(b) In alkali metals the reactivity increases but in the halogens it decreases
with increase in atomic number down the group
(c) The reactivity decreases in the alkali metals but increases in the
halogens with increase in atomic number down the group
(d) In both the alkali metals and the halogens the chemical reactivity
decreases with increase in atomic number down the group
11. In which of the following arrangements, the sequence is not strictly
according  to the property written against it?
(a) HF < HCl < HBr , HI : increasing acid strength
(b) NH
3
 < PH
3
 < AsH
3
 <SbH
3 
: increasing basic strength
(c) B < C < O < N : increasing first ionization enthalpy
(d) CO
2
 < SiO
2
 < SnO
2
 < PbO
2 
: increasing oxidising power
12. Which of the following order is wrong?
(a) NH
3
 < PH
3
 < AsH
3
 — Acidic
(b)
(c)
(d)
13. Which one of the following arrangements represents the correct order of
least negative to most negative electron gain enthalpy for C, Ca, Al, F
and O?
(a) Ca < Al < C < O < F
(b) Al < Ca < O < C < F
(c) Al < O < C < Ca < F
(d) C < F < O < Al < Ca
14. Which of the following elements represents highly electropositive as
well as highly electronegative character in its period?
(a) Hydrogen
(b) Nitrogen
(c) Fluorine
(d) None of these
15. Among Al
2
O
3
, SiO
2
, P
2
O
3
 and SO
2
 the correct order of acid strength is
(a) Al
2
O
3
 < SiO
2
< SO
2
 < P
2
O
3
(b) SiO
2
< SO
2
 < Al
2
O
3
 <  P
2
O
3
(c) SO
2
<  P
2
O
3 
< SiO
2
 < Al
2
O
3
(d) Al
2
O
3 
< SiO
2
<  P
2
O
3 
< SO
2
16. Which of the following arrangements represents the increasing order
(smallest to largest) of ionic radii of the given species O
2–
, S
2–
, N
3–
, P
3–
?
(a) O
2–
 < N
3–
 < S
2–
 < P
3–
(b) O
2–
 < P
3–
 < N
3–
 < S
2–
(c) N
3
 < O
2–
 < P
3–
 < S
2–
(d) N
3–
 < S
2–
 < O
2–
 < P
3–
17. The formation of the oxide ion O
2–
(g), from oxygen atom requires first an
exothermic and then an endothermic step as shown below :
O(g) + e
– 
? O
–
(g); = –141 kJ mol
–1
O
–
 (g) + e
–
 ? O
2–
 (g);  = +780 kJ mol
–1
Thus process of formation of O
2–
 in gas phase is unfavourable even though
O
2–
 is isoelectronic with neon. It is due to the fact that
(a) Electron repulsion outweighs the stability gained by achieving noble gas
configuration
(b) O
–
 ion has comparatively smaller size than oxygen atom
(c) Oxygen is more electronegative
(d) Addition of electron in oxygen results in larger size of the ion.
18. Which of the following statements is wrong ?
(a) van der Waal’s radius of iodine is more than its covalent radius
(b) All isoelectronic ions belong to same period of the periodic table
(c) I.E.
1
 of N is higher than that of O while I.E.
2
 of O is higher than that of
N
(d) The electron gain enthalpy of N is almost zero while that of P is 74.3 kJ
mol
–1
19. Consider the following statements:
(i) Atomic radii decreases across a row of the periodic table when we move
from left to right.
(ii) Atomic radii increases down the column as we move from top to
bottom.
(iii) Although the order of elements is based on atomic numbers, vertical
families share similar chemical properties.
Which of the statement(s) given above is/are correct?
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i), (ii) and (iii)