Classification of Elements and Periodicity in Properties — DPP 3

20 NEET questions from Classification of Elements and Periodicity in Properties, with answers and explanations. Attempt it as a timed test to get scoring, accuracy breakdown and mistake tracking.

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1
Pd has exceptional electronic configuration of 4d$^ { 10 }$ 5s$^ { 0 }$. It belongs to:
  1. A $4 ^ { \text {th } }$ period and group 11
  2. B $5 ^ { \text {th } }$ period and group 10
  3. C $6 ^ { \text {th } }$ period and group 9
  4. D $3 ^ { \text {rd } }$ period and group 16
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Correct answer: B

2
Which of the following will have total number of d electrons equal to the difference in the number of total p and s electrons?
  1. A Sc
  2. B Cr
  3. C Mn
  4. D Kr
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Correct answer: D

3
Which of the following isoelectronic ions has lowest ionisation energy?
  1. A $\mathrm { K } ^ { + }$
  2. B $\mathrm { Ca } ^ { 2 + }$
  3. C $\mathrm { Cl } ^ { - }$
  4. D $\mathrm { S } ^ { 2 - }$
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Correct answer: D

4
Which of the following is not correct for isoelectronic ions?
  1. A They have the same number of electrons around their nuclei.
  2. B Higher the atomic number, higher will be positive charge in a series of isoelectronic ions of same period.
  3. C Isoelectronic ions have same electric charge.
  4. D An isoelectronic series may have both positively and negatively charged ions.
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Correct answer: C

5
Electronic configuration of the $4 ^ { \text {th } }$ transition element is:
  1. A 1s$^ { 2 }$ 2s$^ { 2 }$ 2p$^ { 6 }$ 3s$^ { 2 }$ 3p$^ { 6 }$ 4s$^ { 2 }$
  2. B 1s$^ { 2 }$ 2s$^ { 2 }$ 2p$^ { 6 }$ 3s$^ { 2 }$ 3p$^ { 6 }$ 3d$^ { 4 }$ 4s$^ { 2 }$
  3. C 1s$^ { 2 }$ 2s$^ { 2 }$ 2p$^ { 6 }$ 3s$^ { 2 }$ 3p$^ { 6 }$ 3d$^ { 4 }$
  4. D 1s$^ { 2 }$ 2s$^ { 2 }$ 2p$^ { 6 }$ 3s$^ { 2 }$ 3p$^ { 6 }$ 3d$^ { 5 }$ 4s$^ { 1 }$
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Correct answer: D

6
Which of the following electronic configuration is of transition elements?
  1. A 1s$^ { 2 }$ 2s$^ { 2 }$ 2p$^ { 6 }$ 3s$^ { 2 }$ 3p$^ { 6 }$ 4s$^ { 2 }$
  2. B 1s$^ { 2 }$ 2s$^ { 2 }$ 2p$^ { 6 }$ 3s$^ { 2 }$ 3p$^ { 6 }$ 3d$^ { 10 }$ 4s$^ { 2 }$ 4p$^ { 1 }$
  3. C 1s$^ { 2 }$ 2s$^ { 2 }$ 2p$^ { 6 }$ 3s$^ { 2 }$ 3p$^ { 6 }$ 3d$^ { 10 }$ 4s$^ { 2 }$ 4p$^ { 6 }$
  4. D 1s$^ { 2 }$ 2s$^ { 2 }$ 2p$^ { 6 }$ 3s$^ { 2 }$ 3p$^ { 6 }$ 3d$^ { 2 }$ 4s$^ { 2 }$
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Correct answer: D

7
Isoelectronic ions are those which have:
  1. A same size.
  2. B same ionisation energy.
  3. C same electronic configuration.
  4. D same nuclear charge.
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Correct answer: C

8
Name an element of p block of the periodic table in which last electron goes to the s-orbital of valence shell instead of p-orbital.
  1. A As
  2. B Ga
  3. C He
  4. D No such element is there
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Correct answer: C

9
Which of the following species have the same number of electrons in its outermost as well as penultimate shell?
  1. A $\mathrm { Mg } ^ { 2 + }$
  2. B $\mathrm { O } ^ { 2 - }$
  3. C $\mathrm { F } ^ { - }$
  4. D $\mathrm { Ca } ^ { 2 + }$
Show answer

Correct answer: D

10
Which block of the periodic table contains the element with configuration
1s$^{2}$2s$^{2}$2p$^{6}$3s$^{2}$3p$^{6}$3d$^{10}$4s$^{1}$
  1. A s block
  2. B p block
  3. C d block
  4. D f block
Show answer

Correct answer: C

11
Which of the following does not affect the ionisation potential of the atom?
  1. A Nuclear charge
  2. B Atomic size
  3. C Penetration effect
  4. D Number of neutrons
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Correct answer: D

12
The long form of periodic table was based on:
  1. A atomic numbers
  2. B atomic masses
  3. C atomic volumes
  4. D effective nuclear charge
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Correct answer: A

13
Which of the following ions is paramagnetic in character?
  1. A Zn$^{2+}$
  2. B Cu$^{+}$
  3. C Ni$^{2+}$
  4. D Ag$^{+}$
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Correct answer: C

14
Which out of the following has the largest ionisation energy?
  1. A ${ } _ { 11 } \mathrm { Na }$
  2. B ${ } _ { 19 } \mathrm {~K}$
  3. C ${ } _ { 12 } \mathrm { Mg }$
  4. D ${ } _ { 37 } \mathrm { Rb }$
Show answer

Correct answer: A

15
Which out of the following has the largest size?
  1. A $\mathrm { Rb } ^ { + }$
  2. B $\mathrm { Mg } ^ { 2 + }$
  3. C $\mathrm { Li } ^ { + }$
  4. D $\mathrm { Na } ^ { + }$
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Correct answer: A

16
Which is mismatched regarding the position of the elements given below?
  1. A X(Z = 89), f block, $6 ^ { \text {th } }$ period
  2. B Y(Z = 100), f block, $7 { } ^ { \text {th } }$ period
  3. C Z(Z = 115), d block, $7 ^ { \text {th } }$ period
  4. D Both (A) and (C)
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Correct answer: D

17
The tenth element in the periodic table resembles the element with atomic number:
  1. A 2 as well as 30
  2. B 2 as well as 54
  3. C 8 as well as 18
  4. D 8 only
Show answer

Correct answer: B

18
Which of the following is correct?
  1. A $r _ { \text {ionic } } \propto Z$
  2. B $r _ { \text {ionic } } \propto Z _ { \text {eff } }$
  3. C $r _ { \text {ionic } } \propto \frac { 1 } { Z _ { \text {eff } } }$
  4. D $r _ { \text {ionic } } \propto Z _ { \text {eff } } ^ { 2 }$
Show answer

Correct answer: C

19
Which of the following process requires largest energy among them?
  1. A $\mathrm { Al } ( \mathrm { g } ) \rightarrow \mathrm { Al } ^ { + } ( \mathrm { g } ) + \mathrm { e } ^ { - }$
  2. B $\mathrm { Al } ^ { 2 + } ( \mathrm { g } ) \rightarrow \mathrm { Al } ^ { 3 + } ( \mathrm { g } ) + \mathrm { e } ^ { - }$
  3. C $\mathrm { Al } ^ { + } ( \mathrm { g } ) \rightarrow \mathrm { Al } ^ { 2 + } ( \mathrm { g } ) + \mathrm { e } ^ { - }$
  4. D All the processes requires same amount of energy
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Correct answer: B

20
Which of the following has smallest size?
  1. A $\mathrm { Al } ^ { 3 + }$
  2. B $\mathrm { Al } ^ { 2 + }$
  3. C $\mathrm { Al } ^ { + }$
  4. D Al
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Correct answer: A

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