On account of the disruption in education due to the corona pandemic, we're are providing a 7-day Free trial of our platform to teachers. Know More →

JEE Main

Explore popular questions from Classification of Elements and Periodicity in Properties for JEE Main. This collection covers Classification of Elements and Periodicity in Properties previous year JEE Main questions hand picked by experienced teachers.

Select Subject

Physics

Chemistry

Mathematics

Classification of Elements and Periodicity in Properties

Correct Marks 4

Incorrectly Marks -1

Q 1. Which of the following metals give inflammable gas with both acid and base?

A

{tex} \mathrm { Na } {/tex} and {tex} \mathrm { Zn } {/tex}

B

{tex} \mathrm { Mg } {/tex} and {tex} \mathrm { Al } {/tex}

C

{tex} \mathrm { Mg } {/tex} and {tex} \mathrm { Be } {/tex}

{tex} \mathrm { Zn } {/tex} and {tex} \mathrm { Al } {/tex}

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 2. Which of the following have an incorrect order of ionization energy:

A

{tex} \mathrm { Pb } ( \mathrm { IE } ) > \mathrm { Sn } ( \mathrm { IE } ) {/tex}

B

{tex} \mathrm { Na } ^ { + } ( \mathrm { IE } ) > \mathrm { Mg } ^ { + } ( \mathrm { IE } ) {/tex}

{tex} \mathrm { Li } ^ { + } ( \mathrm { IE } ) < \mathrm { O } ^ { + } ( \mathrm { IE } ) {/tex}

D

{tex} \mathrm { Be } ^ { + } ( \mathrm { IE } ) < \mathrm { C } ^ { + } ( \mathrm { IE } ) {/tex}

Explanation



Correct Marks 4

Incorrectly Marks -1

Q 3. Which set of ions have same magnetic moment?

A

{tex} \mathrm { Co } ^ { + 2 } , \mathrm { Cr } ^ { + 3 } , \mathrm { V } ^ { + 3 } {/tex}

{tex} \mathrm { Mn } ^ { + 2 } , \mathrm { Fe } ^ { + 3 } , \mathrm { Cr } ^ { + } {/tex}

C

{tex} \mathrm { Ni } ^ { + 2 } , \mathrm { Mn } ^ { + 2 } , \mathrm { Co } ^ { + 2 } {/tex}

D

{tex} \mathrm { Fe } ^ { + 2 } , \mathrm { Mn } ^ { + 2 } , \mathrm { Co } ^ { + 2 } {/tex}

Explanation



Correct Marks 4

Incorrectly Marks -1

Q 4. The correct order of acidic strength of the following is:

{tex} \mathrm { SO } _ { 2 } > \mathrm { P } _ { 2 } \mathrm { O } _ { 3 } > \mathrm { SiO } _ { 2 } > \mathrm { Al } _ { 2 } \mathrm { O } _ { 3 } {/tex}

B

{tex} \mathrm { P } _ { 2 } \mathrm { O } _ { 3 } > \mathrm { SO } _ { 2 } > \mathrm { SiO } _ { 2 } > \mathrm { Al } _ { 2 } \mathrm { O } _ { 3 } {/tex}

C

{tex} \mathrm { P } _ { 2 } \mathrm { O } _ { 3 } > \mathrm { Al } _ { 2 } \mathrm { O } _ { 3 } > \mathrm { SO } _ { 2 } > \mathrm { SiO } _ { 2 } {/tex}

D

{tex} \mathrm { Al } _ { 2 } \mathrm { O } _ { 3 } > \mathrm { SiO } _ { 2 } > \mathrm { P } _ { 2 } \mathrm { O } _ { 3 } > \mathrm { SO } _ { 2 } {/tex}

Explanation



Correct Marks 4

Incorrectly Marks -1

Q 5. The value of {tex} \mathrm { IE } _ { 1 } , \mathrm { IE } _ { 2 } , \mathrm { IE } _ { 3 } , {/tex} and {tex} \mathrm { IE } _ { 4 } {/tex} of an atom are {tex} 7.5 \mathrm { eV } , 25.6 \mathrm { eV } , 48.6 \mathrm { eV } {/tex} and 170.6{tex} \mathrm { eV } {/tex} respectively.
The electronic configuration of the atom will be:

A

1{tex} \mathrm { s } ^ { 2 } 2 \mathrm { s } ^ { 2 } 2 \mathrm { p } ^ { 6 } 3 \mathrm { s } ^ { 1 } {/tex}

1{tex} \mathrm { s } ^ { 2 } 2 \mathrm { s } ^ { 2 } 2 \mathrm { p } ^ { 6 } 3 \mathrm { s } ^ { 2 } 3 \mathrm { p } ^ { 1 } {/tex}

C

1{tex} \mathrm { s } ^ { 2 } 2 \mathrm { s } ^ { 2 } 2 \mathrm { p } ^ { 6 } 3 \mathrm { s } ^ { 2 } 3 \mathrm { p } ^ { 3 } {/tex}

D

1{tex} \mathrm { s } ^ { 2 } 2 \mathrm { s } ^ { 2 } 2 \mathrm { p } ^ { 6 } 3 \mathrm { s } ^ { 2 } {/tex}

Explanation



Correct Marks 4

Incorrectly Marks -1

Q 6. The correct order increasing radii is:

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

B

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

C

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

D

{tex} S ^ { 2 - } , O ^ { 2 - } , A s ^ { 3 } {/tex}

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 7. What will be the distance between {tex} \mathrm { H } {/tex} and {tex} \mathrm { Cl } {/tex} atom in HCl. The radius of hydrogen is 0.37{tex} \mathrm { Å} {/tex} and the radius of chlorine is 1.67{tex} \mathrm { Å } ? {/tex}
(According to the concept of covalent radius)

A

37.3{tex} \mathrm { g } {/tex}

1.96Å

C

2.12{tex} \mathrm { Å} {/tex}

D

1.0{tex}Å{/tex}

Explanation



Correct Marks 4

Incorrectly Marks -1

Q 8. The electronegativity of the following elements increases in the order:

A

{tex} \mathrm { S } < \mathrm { P } < \mathrm { N } < \mathrm { O } {/tex}

{tex} \mathrm { P } < \mathrm { S } < \mathrm { N } < \mathrm { O } {/tex}

C

{tex} \mathrm { N } < \mathrm { O } < \mathrm { P } < \mathrm { S } {/tex}

D

{tex} \mathrm { N } < \mathrm { P } < \mathrm { S } < \mathrm { O } {/tex}

Explanation



Correct Marks 4

Incorrectly Marks -1

Q 9. The formation of the oxide ion, {tex} \mathrm { O } ^ { 2 - } ( \mathrm { g } ) , {/tex} from oxygen atom requires first an exothermic and then an endothermic step as shown below:
{tex}\mathrm{O(g)+e^{-}\rightarrow O^{-}(g);\triangle_{eg}H=-141\,kJ mol^{-1}}{/tex}
{tex}\mathrm{O^{-}(g)+e^{-}\rightarrow O^{2-}(g);\triangle_{eg}H=+780\,kJ mol^{-1}}{/tex}
Thus process of formation of {tex} \mathrm { O } ^ { 2 - } {/tex} in gas phase is unfavorable even {tex} \mathrm { O } ^ { 2 - } {/tex} is isoelectronic with neon. It is due to the fact that:

A

Oxygen is more electronegative.

B

Addition of electron in oxygen results in larger size of the ion.

Electron repulsion outweighs the stability gained by achieving noble gas configuration.

D

{tex} \mathrm {O^{2-}} {/tex} ion has comparatively smaller size than oxygen atom.

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 10. In which of the following compounds chromium shows maximum radius:-

A

{tex} \mathrm { K } _ { 2 } \mathrm { Cr } _ { 2 } \mathrm { O } _ { 7 } {/tex}

B

{tex} \mathrm { CrO } _ { 2 } \mathrm { Cl } _ { 2 } {/tex}

C

{tex} \mathrm { Cr } _ { 2 } \left( \mathrm { SO } _ { 4 } \right) _ { 3 } {/tex}

{tex} \mathrm { CrCl } _ { 2 } {/tex}

Explanation

Correct Marks 4

Incorrectly Marks -1

Q 11. The atomic number of three elements {tex} \mathrm { A } , \mathrm { B } {/tex} and {tex} \mathrm { C } {/tex} are {tex} \mathrm { a } , \mathrm { a } + 1 {/tex} and {tex} \mathrm { a } + 2 , \mathrm { C } {/tex} is an alkali metal. In a compound of {tex} \mathrm { A } {/tex} and {tex} \mathrm { C } , {/tex} the nature of bonding is-

A

Co-ordinate

B

Covalent

Ionic

D

Metallic

Explanation