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Classification of Elements and Periodicity in Properties

JEE Main 2024 (Online) 30th January Evening ShiftMCQEasy📈 Topic in 8% papers+4−1
Ques. 1JEE 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

Answer

(1) Statement I is False but Statement II is true

Solution

Statement I: reactivity is high at the two ends of a period (group 1 metals, group 17 non-metals), lower in the middle, and group 18 gases are almost inert ⇒ Statement I is false.

Statement II: group 1 oxides (e.g. Na2O) are basic; group 17 oxides (e.g. Cl2O7) are acidic ⇒ Statement II is true.

∵ along a period metallic character decreases and non-metallic character increases

Answer: (1)

Keep practising — Classification of Elements and Periodicity in Properties

Ques. 2JEE 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. 3JEE 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. 4JEE Main 2024, 29 January (Evening Shift)

The element having the highest first ionization enthalpy is

  1. C
  2. Al
  3. Si
  4. N
Ques. 5JEE 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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