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Classification of Elements and Periodicity in Properties

JEE Main 2024 (Online) 30th January Morning ShiftNumericalEasy📈 Topic in 7% papers+4
Ques. 1JEE 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 .

Answer

11

Solution

un = 1, un = 1, un = 1 ⇒ Z = 111 (Roentgenium, Rg)

∵ 111 = 79 + 32 ⇒ it lies just below Au (Cu, Ag, Au, Rg) in the 7th period

∴ group 11 ⇒ n = 11

Answer: 11

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Ques. 2JEE 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. 3JEE 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. 4JEE 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. 5JEE Main 2024, 29 January (Evening Shift)

The element having the highest first ionization enthalpy is

  1. C
  2. Al
  3. Si
  4. N
Ques. 6JEE 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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