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p-Block Elements (Group 13 & 14)

JEE Main 2025 (Online) 2nd April Morning ShiftMCQEasy📈 Topic in 26% papers+4−1
Ques. 1JEE Main 2025, 2 April (Morning Shift)

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

  1. Statement I is correct but Statement II is incorrect
  2. Both Statement I and Statement II are correct
  3. Statement I is incorrect but Statement II is correct
  4. Both Statement I and Statement II are incorrect

Answer

(3) Statement I is incorrect but Statement II is correct

Solution

Statement I: As per NCERT, metallic radius of Al = 143 pm and of Ga = 135 pm.

In Ga the 10 d-electrons of the inner (3d) shell shield the nucleus poorly, so the effective nuclear charge rises and Ga is smaller than Al.

Metallic radius of Al is greater than that of Ga Statement I is incorrect.

Statement II: Ionic radius of Al3+ = 53.5 pm and of Ga3+ = 62 pm.

Al3+ is smaller than Ga3+ Statement II is correct.

Answer: (3)

Keep practising — p-Block Elements (Group 13 & 14)

Ques. 2JEE Main 2025, 29 January (Morning Shift)

The standard reduction potential values of some of the p-block ions are given below. Predict the one with the strongest oxidising capacity.

  1. E Sn4+/Sn2+ = +0.15 V
  2. E Al3+/Al = -1.66 V
  3. E Pb4+/Pb2+ = +1.67 V
  4. E Tl3+/Tl = +1.26 V
Ques. 3JEE Main 2025, 28 January (Morning Shift)

Consider the following elements In, Tl, Al, Pb, Sn and Ge. The most stable oxidation states of elements with highest and lowest first ionisation enthalpies, respectively, are

  1. +4 and +1
  2. +4 and +3
  3. +1 and +4
  4. +2 and +3
Ques. 4JEE Main 2025, 24 January (Evening Shift)

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. Both Statement I and Statement II are true
  4. Statement I is true but Statement II is false
Ques. 5JEE Main 2025, 23 January (Evening Shift)

Given below are the atomic numbers of some group 14 elements. The atomic number of the element with lowest melting point is :

  1. 14
  2. 50
  3. 6
  4. 82

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