# Class 10

Explore popular questions from Periodic Classification of Elements for Class 10. This collection covers Periodic Classification of Elements previous year Class 10 questions hand picked by experienced teachers.

# Mathematics

Periodic Classification of Elements

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Q 1. Which among the following elements have lowest value of {tex}\mathrm{IE_1}{/tex}?

Pb

B

Sn

C

Si

D

C

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Q 2. The number of periods and group in the long form of periodic table are respectively

A

7 and 9

B

8 and 18

7 and 18

D

6 and 10

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Q 3. The elements which are characterised by the outer shell configurations {tex}\mathrm{ns^1}{/tex} to {tex}\mathrm{ns^2} {/tex} and {tex}\mathrm{ns^2p^1}{/tex} to {tex}\mathrm{ns^2p^5}{/tex} are collectively called

A

Transition elements

Representative elements

C

Lanthanides

D

Inner transition elements

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Q 4. With reference to concept of ionisation potential , which one of the following sets is correct?

A

U > K > Cs

Na > K > Cs

C

Cs > U > B

D

Cs < U < K

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Q 5. Compared to the first ionisation, the value of second ionisation potential of an element is

A

negligible

B

smaller

greater

D

double

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Q 6. The ionisation energy decreases in moving down a group. This is due to

A

increase in nuclear charge

B

increase in atomic size and nuclear charge

C

increase in nuclear charge and decrease in shielding effect

increase in atomic size and also shielding effect

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Q 7. Which of the following statements concerning ionisation energy is not correct?

A

The second ionisation energy is always more than the first

Within a group, there is a gradual increase in ionisation energy because of nuclear charge

C

Ionisation energies of the Be is more than B

D

Ionisation energies of noble gases are high.

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Q 8. {tex}\mathrm{r_{(van\ der\ Waal)}}{/tex} is

A

half the bond length

B

twice the bond length

half the distance between centres of nuclei of two non bonded atoms of adjacent molecules

D

none of these

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Q 9. The size of the species {tex}\mathrm{Cl}{/tex}, {tex}\mathrm{Cl^-}{/tex} and {tex}\mathrm{Cl^+}{/tex} decreases as

A

{tex}\mathrm {Cl} {/tex} > {tex}\mathrm{Cl^+}{/tex}> {tex}\mathrm{Cl^-}{/tex}

B

{tex}\mathrm {Cl^+} {/tex} > {tex}\mathrm{Cl^-}{/tex}> {tex}\mathrm{Cl}{/tex}

C

{tex}\mathrm {Cl^-} {/tex} > {tex}\mathrm{Cl^+}{/tex}> {tex}\mathrm{Cl}{/tex}

{tex}\mathrm {Cl^-} {/tex} > {tex}\mathrm{Cl}{/tex}> {tex}\mathrm{Cl^+}{/tex}

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Q 10. The ions which are arranged in correct order of increasing radii are

A

{tex}\mathrm{K^+}{/tex}, {tex}\mathrm{Ca^{2+}}{/tex}, {tex}\mathrm{S^{2-}}{/tex}

{tex}\mathrm{Be^{2+}}{/tex}, {tex}\mathrm{Mg^{2+}}{/tex}, {tex}\mathrm{Na^{+}}{/tex}

C

{tex}\mathrm{O^{2-}}{/tex}, {tex}\mathrm{F^{-}}{/tex}, {tex}\mathrm{N^{3-}}{/tex}

D

{tex}\mathrm{S^{2-}}{/tex}, {tex}\mathrm{O^{2-}}{/tex}, {tex}\mathrm{As^{3-}}{/tex}

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Q 11. The size of following species increases in the order

{tex}\mathrm{Mg^{2+}}{/tex}< {tex}\mathrm{Na^{+}}{/tex}<{tex}\mathrm{F^-}{/tex} <{tex}\mathrm {Al}{/tex}

B

{tex}\mathrm{F^-}{/tex}< {tex}\mathrm {Al}{/tex}< {tex}\mathrm{Na^{+}}{/tex}< {tex}\mathrm{Mg^{2+}}{/tex}

C

{tex}\mathrm{Al}{/tex}< {tex}\mathrm{Mg^{2+}}{/tex}< {tex}\mathrm{F^{-}}{/tex}< {tex}\mathrm{Na^{+}}{/tex}

D

{tex}\mathrm{Na^{+}}{/tex}< {tex}\mathrm {Al}{/tex} < {tex}\mathrm{F^{-}}{/tex}< {tex}\mathrm{Mg^{2+}}{/tex}

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Q 12. The correct order of ionic radii for the ions {tex}\mathrm{S^{2-}. Cl^{-}, P^{3-}, Ca^{2+}}{/tex} is

A

{tex}\mathrm{Ca^{2+} > Cl^- > S^{2-} > P^{3-}}{/tex}

B

{tex}\mathrm{S^{2-} > P^{3-} > Cl^{-} > Ca^{2+}}{/tex}

C

{tex}\mathrm{P^{3-} > S^{2-} > Cl^{-} > Ca^{2+}}{/tex}

{tex}\mathrm{Ca^{2+} > Cl^{-} > S^{2-} > P^{3-}}{/tex}

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Q 13. The anion {tex}\mathrm{O^{2-}}{/tex} is iso-electronic with

A

{tex}\mathrm {{F^+}}{/tex}

B

{tex} \mathrm {N^{2-}}{/tex}

{tex} \mathrm {F^{-}}{/tex}

D

{tex} \mathrm {N^{3+}}{/tex}

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Q 14. For an element with configuration {tex}\mathrm{5s^24d^{10}5p^3}{/tex}, the chemistry is likely to be similar to that of

A

boron

B

oxygen

C

chlorine

phosphorus

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Q 15. Which of the follwoing elements has zero electron affinity?

A

Na

Ne

C

F

D

none of these

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Q 16. The correct order of electron affinity of halogens is

A

F > Cl > Br > I

B

I > Br > Cl > F

Cl > F > Br > I

D

Cl > F < Br < I

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Q 17. Outer most configuration of most electronegative element of the periodic table is

A

{tex}3s^23p^6{/tex}

{tex}2s^22p^5{/tex}

C

{tex}4s^24p^5{/tex}

D

{tex}2s^22p^4{/tex}

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Q 18. Diagonal relationship is shown by

A

all elements with their diagonally opposite elements

B

all elements of 3rd and 4th periods

some of the elements of 2nd and 3rd periods

D

elements of d-block

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Q 19. Which of the following pairs show diagonal relationship?

A

N, P

B

N, O

C

N, S

None of these

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Q 20. The ionisation energy of an atom is the energy

A

needed to add an electron to an atom

B

needed to transfer an electron from one orbit to another

C

needed to convert the atom into a radioactive isotope

just enough to cause the electron to escape from the isolated atom

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Q 21. The maximum tendency to form the gaseous unipositive ion is for the element with configuration

A

{tex}1s^22s^22p^63s^2{/tex}

{tex}1s^22p^63s^1{/tex}

C

{tex}1s^22s^22p^63s^23p^2{/tex}

D

{tex}1s^22s^22p^63s^23p^3{/tex}

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Q 22. In the periodic table, with the increase in the atomic number, the metallic character of the element

decreases in a period and increases in a group

B

increases in a period and decreases in a group

C

increases both in a period and a group

D

decreases both in a period and a group

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Q 23. Amongst the following electronic configuration which one will have highest electron affinity?

A

{tex}1s^1{/tex}

B

{tex}1s^22s^1{/tex}

C

{tex}1s^22s^22p^4{/tex}

{tex}1s^22s^22p^5{/tex}

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Q 24. With which of the following configuration the lowest value of first IE is associated

{tex}1s^22s^22p^63s^1{/tex}

B

{tex}1s^22s^22p^5{/tex}

C

{tex}1s^22s^22p^6{/tex}

D

{tex}1s^22s^22p^63s^22p^2{/tex}

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Q 25. In the long form of the periodic table, the transition metals are placed in

A

s-block

B

f-block

d-block

D

s and p-block