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Classification of Elements and Periodicity in Properties

JEE Main 2024 (Online) 31st January Evening ShiftMCQEasy📈 Topic in 19% papers+4−1
Ques. 1JEE Main 2024, 31 January (Evening Shift)

Consider the following elements. [figure] Which of the following is/are true about A', B', C' and D' ? Choose the correct answer from the options given below :

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

Answer

(4) A, B and D only

Solution

A′ → B′ along a period; C′, D′ are below them in the next period

Along a period: size and metallic character decrease ⇒ B′ < A′, D′ < C′

Down a group: size and metallic character increase ⇒ A′ < C′, B′ < D′ (and A′ < D′, the period change dominates)

A: B' < A' < D' < C' ⇒ A is true

B: metallic character follows the same order ⇒ B is true

C: places C′, D′ smaller than A′, B′ ⇒ C is false

D: cations of the same charge follow the atomic order ⇒ D is true

Answer: (4)

Keep practising — Classification of Elements and Periodicity in Properties

Ques. 2JEE Main 2024, 30 January (Morning Shift)

If IUPAC name of an element is "Unununnium" then the element belongs to nth group of Periodic table. The value of n is .

Ques. 3JEE Main 2024, 30 January (Evening Shift)

Given below are two statements: In the light of the above statements, choose the most appropriate 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
Ques. 4JEE Main 2024, 29 January (Morning Shift)

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : In the light of the above statements, choose the most appropriate from the options given below :

  1. A is false but R is true
  2. Both A and R are true but R is NOT the correct explanation of A
  3. Both A and R are true and R is the correct explanation of A
  4. A is true but R is false
Ques. 5JEE Main 2024, 29 January (Evening Shift)

Given below are two statements: In the light of the above statements, choose the most appropriate 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
Ques. 6JEE Main 2024, 29 January (Evening Shift)

The element having the highest first ionization enthalpy is

  1. C
  2. Al
  3. Si
  4. N
Ques. 7JEE Main 2024, 27 January (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 false but Statement II is true
  2. Both Statement I and Statement II are true
  3. Statement I is true but Statement II is false
  4. Both Statement I and Statement II are false

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