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CHXI11:THE P-BLOCK ELEMENTS

316559 The decreasing order of M.P. of group -15 elements is

1

Bi > Sb > As > P > N

2

As > Sb > Bi > P > N

3

N > P > As > Sb > Bi

4

Sb > As > Sb > N > P

CHXI11:THE P-BLOCK ELEMENTS

316560 The element which does not belong to group 15 is

1 As

2

P

3

Bi

4

Se

Explanation:

The element which does not belong to group 15 is Se (selenium). It belongs to group 16 of the periodic table. It resides in 4th period and 16 th group having atomic number 34. Electronic configuration of Se is $4 s^{2} 4 p^{4}$ .

MHTCET - 2019

CHXI11:THE P-BLOCK ELEMENTS

316561 Correct statement(s) about phosphorus atom is/ are

1 It has 5 vacant orbitals in the valence shell

2 It has 3 unpaired electrons

3 Nine electrons have similar spin

4 All the above

CHXI11:THE P-BLOCK ELEMENTS

316562 Read the Assertion and Reason carefully to mark the correct option out of the options given below.
Assertion :
Both rhombic and monoclinic sulphur exist as $S_{8}$ while oxygen exists as $O_{2}$ .
Reason :
Oxygen forms $p π - p π$ multiple bonds with itself and other elements having small size and high electronegativity like C,N, which is not possible for sulphur.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

Due to small size and high electronegativity, oxygen forms $p π - p π$ multiple bonds with itself and with other elements having similar size like carbon, nitrogen, etc. This tendency of forming $p π - p π$ multiple bonds with itself is not shown by sulphur, due to larger size and lower electronegativity. But sulphur can form multiple bond with small size atoms like C and N .
e.g., $S = C = S, S = C = N^{-}$ .
So, the correct option is (2).

JEE Main - 2024

CHXI11:THE P-BLOCK ELEMENTS

316559 The decreasing order of M.P. of group -15 elements is

1

Bi > Sb > As > P > N

2

As > Sb > Bi > P > N

3

N > P > As > Sb > Bi

4

Sb > As > Sb > N > P

CHXI11:THE P-BLOCK ELEMENTS

316560 The element which does not belong to group 15 is

1 As

2

P

3

Bi

4

Se

Explanation:

The element which does not belong to group 15 is Se (selenium). It belongs to group 16 of the periodic table. It resides in 4th period and 16 th group having atomic number 34. Electronic configuration of Se is $4 s^{2} 4 p^{4}$ .

MHTCET - 2019

CHXI11:THE P-BLOCK ELEMENTS

316561 Correct statement(s) about phosphorus atom is/ are

1 It has 5 vacant orbitals in the valence shell

2 It has 3 unpaired electrons

3 Nine electrons have similar spin

4 All the above

CHXI11:THE P-BLOCK ELEMENTS

316562 Read the Assertion and Reason carefully to mark the correct option out of the options given below.
Assertion :
Both rhombic and monoclinic sulphur exist as $S_{8}$ while oxygen exists as $O_{2}$ .
Reason :
Oxygen forms $p π - p π$ multiple bonds with itself and other elements having small size and high electronegativity like C,N, which is not possible for sulphur.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

Due to small size and high electronegativity, oxygen forms $p π - p π$ multiple bonds with itself and with other elements having similar size like carbon, nitrogen, etc. This tendency of forming $p π - p π$ multiple bonds with itself is not shown by sulphur, due to larger size and lower electronegativity. But sulphur can form multiple bond with small size atoms like C and N .
e.g., $S = C = S, S = C = N^{-}$ .
So, the correct option is (2).

JEE Main - 2024

CHXI11:THE P-BLOCK ELEMENTS

316559 The decreasing order of M.P. of group -15 elements is

1

Bi > Sb > As > P > N

2

As > Sb > Bi > P > N

3

N > P > As > Sb > Bi

4

Sb > As > Sb > N > P

CHXI11:THE P-BLOCK ELEMENTS

316560 The element which does not belong to group 15 is

1 As

2

P

3

Bi

4

Se

Explanation:

The element which does not belong to group 15 is Se (selenium). It belongs to group 16 of the periodic table. It resides in 4th period and 16 th group having atomic number 34. Electronic configuration of Se is $4 s^{2} 4 p^{4}$ .

MHTCET - 2019

CHXI11:THE P-BLOCK ELEMENTS

316561 Correct statement(s) about phosphorus atom is/ are

1 It has 5 vacant orbitals in the valence shell

2 It has 3 unpaired electrons

3 Nine electrons have similar spin

4 All the above

CHXI11:THE P-BLOCK ELEMENTS

316562 Read the Assertion and Reason carefully to mark the correct option out of the options given below.
Assertion :
Both rhombic and monoclinic sulphur exist as $S_{8}$ while oxygen exists as $O_{2}$ .
Reason :
Oxygen forms $p π - p π$ multiple bonds with itself and other elements having small size and high electronegativity like C,N, which is not possible for sulphur.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

Due to small size and high electronegativity, oxygen forms $p π - p π$ multiple bonds with itself and with other elements having similar size like carbon, nitrogen, etc. This tendency of forming $p π - p π$ multiple bonds with itself is not shown by sulphur, due to larger size and lower electronegativity. But sulphur can form multiple bond with small size atoms like C and N .
e.g., $S = C = S, S = C = N^{-}$ .
So, the correct option is (2).

JEE Main - 2024

CHXI11:THE P-BLOCK ELEMENTS

316559 The decreasing order of M.P. of group -15 elements is

1

Bi > Sb > As > P > N

2

As > Sb > Bi > P > N

3

N > P > As > Sb > Bi

4

Sb > As > Sb > N > P

CHXI11:THE P-BLOCK ELEMENTS

316560 The element which does not belong to group 15 is

1 As

2

P

3

Bi

4

Se

Explanation:

The element which does not belong to group 15 is Se (selenium). It belongs to group 16 of the periodic table. It resides in 4th period and 16 th group having atomic number 34. Electronic configuration of Se is $4 s^{2} 4 p^{4}$ .

MHTCET - 2019

CHXI11:THE P-BLOCK ELEMENTS

316561 Correct statement(s) about phosphorus atom is/ are

1 It has 5 vacant orbitals in the valence shell

2 It has 3 unpaired electrons

3 Nine electrons have similar spin

4 All the above

CHXI11:THE P-BLOCK ELEMENTS

316562 Read the Assertion and Reason carefully to mark the correct option out of the options given below.
Assertion :
Both rhombic and monoclinic sulphur exist as $S_{8}$ while oxygen exists as $O_{2}$ .
Reason :
Oxygen forms $p π - p π$ multiple bonds with itself and other elements having small size and high electronegativity like C,N, which is not possible for sulphur.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

Due to small size and high electronegativity, oxygen forms $p π - p π$ multiple bonds with itself and with other elements having similar size like carbon, nitrogen, etc. This tendency of forming $p π - p π$ multiple bonds with itself is not shown by sulphur, due to larger size and lower electronegativity. But sulphur can form multiple bond with small size atoms like C and N .
e.g., $S = C = S, S = C = N^{-}$ .
So, the correct option is (2).

JEE Main - 2024

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