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p-Block Elements (Group 15–18) · Question 4

JEE Main 2026 (Online) 28th January Morning ShiftMCQEasy📈 Topic in 29% papers+4−1
1

Regarding the hydrides of group 15 elements EH3 (E = N, P, As, Sb), select the correct statement from the following : Choose the correct answer from the options given below :

  1. A, B & C only
  2. A, B, C & D
  3. A & D only
  4. B & C only

Answer

(1) A, B & C only

Solution

A. As per NCERT, the E–H bond dissociation enthalpy decreases down the group because the size of E increases, so the stability of hydrides decreases from NH3 to SbH3. Correct.

B. The lone pair on E becomes more diffuse as the size increases, so basicity decreases: NH3 > PH3 > AsH3 > SbH3. Correct.

C. Weaker E–H bonds give up hydrogen more easily, so the reducing character increases down the group. Correct.

D. Boiling points (NCERT): PH3 (185.5 K) < AsH3 (210.6 K) < NH3 (238.5 K) < SbH3 (254.6 K).

NH3 has an unusually high boiling point because of hydrogen bonding, so the boiling point does not increase regularly down the group. Incorrect.

A, B and C are correct.

Answer: (1)

JEE Main 2026 (Online) 28th January Morning Shift

Keep practising — p-Block Elements (Group 15–18)

2

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

  1. Statement I is false but Statement II is true
  2. Both Statement I and Statement II are false
  3. Statement I is true but Statement II is false
  4. Both Statement I and Statement II are true
JEE Main 2026 (Online) 28th January Evening Shift
3

One mole of Cl2(g) was passed into 2 L of cold 2 M KOH solution. After the reaction, the concentrations of Cl-, ClO- and OH- are respectively (assume volume remains constant)

  1. 0.5 M, 0.5 M, 0.5 M
  2. 1 M, 1 M, 1 M
  3. 0.5 M, 0.5 M, 1 M
  4. 0.75 M, 0.75 M, 1 M
JEE Main 2026 (Online) 24th January Evening Shift
4

Elements X and Y belong to Group 15. The difference between the electronegativity values of 'X' and phosphorus is higher than that of the difference between phosphorus and 'Y'. 'X' & 'Y' are respectively

  1. As & Bi
  2. Bi & N
  3. N & As
  4. As & Sb
JEE Main 2026 (Online) 23rd January Evening Shift
5

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below

  1. Statement I is true but Statement II is false
  2. Statement I is false but Statement II is true
  3. Both Statement I and Statement II are true
  4. Both Statement I and Statement II are false
JEE Main 2026 (Online) 22nd January Morning Shift
6

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

  1. Statement I is false but Statement II is true
  2. Statement I is true but Statement II is false
  3. Both Statement I and Statement II are false
  4. Both Statement I and Statement II are true
JEE Main 2026 (Online) 22nd January Evening Shift
7

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

  1. Both Statement I and Statement II are true
  2. Both Statement I and Statement II are false
  3. Statement I is false but Statement II is true
  4. Statement I is true but Statement II is false
JEE Main 2026 (Online) 21st January Evening Shift
8

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below:

  1. Both Statement I and Statement II are true
  2. Statement I is true but Statement II is false
  3. Both Statement I and Statement II are false
  4. Statement I is false but Statement II is true
JEE Main 2025 (Online) 8th April Evening Shift
9

Given below are two statements: In the light of given statements, choose the correct answer from the options given below.

  1. Both Statement I and Statement II are true
  2. Statement I is true but Statement II is false
  3. Statement I is false but Statement II is true
  4. Both Statement I and Statement II are False
JEE Main 2025 (Online) 4th April Morning Shift
10

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below

  1. Statement I is false but Statement II is true
  2. Both Statement I and Statement II are true
  3. Both Statement I and Statement II are false
  4. Statement I is true but Statement II is false
JEE Main 2025 (Online) 3rd April Morning Shift
11

The property/properties that show irregularity in first four elements of group-17 is/are Choose the correct answer from the options given below :

  1. A, B, C and D
  2. A and C only
  3. B only
  4. B and D only
JEE Main 2025 (Online) 2nd April Morning Shift

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