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Classification of Elements and Periodicity in Properties · Question 5

JEE Main 2026 (Online) 5th April Evening ShiftMCQMedium📈 Topic in 6% papers+4−1
1

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 true but Statement II is false
  4. Statement I is false but Statement II is true

Answer

(1) Both Statement I and Statement II are true

Solution

Statement I:

[Al2O3, Cr2O3]: both amphoteric ⇒ same nature

[Cl2O7, Mn2O7]: both acidic (Cl and Mn in +7, highest oxidation state) ⇒ same nature

[Na2O, V2O3]: Na2O basic; as per NCERT, V2O3 (V in +3) is basic ⇒ same nature

[CO, N2O]: both neutral ⇒ same nature

⇒ all 4 pairs contain oxides of the same nature ∴ Statement I is true.

Statement II:

Na2O – basic, Al2O3 – amphoteric, CO – neutral, Cl2O7 – acidic

⇒ most basic = Na2O (oxide of the most electropositive element), most acidic = Cl2O7 ∴ Statement II is true.

Answer: (1)

JEE Main 2026 (Online) 5th April Evening Shift

Keep practising — Classification of Elements and Periodicity in Properties

2

A monoatomic anion (A-) has 45 neutrons and 36 electrons. Atomic mass, group in the periodic table and physical state at room temperature of the element (A) respectively are

  1. 80, 17, liquid
  2. 81, 16, solid
  3. 80, 16, gas
  4. 81, 15, gas
JEE Main 2026 (Online) 4th April Morning Shift
3

The 1st ionization enthalpy for Mg is +737 kJ/mol. The most probable estimated value of the 2nd ionization enthalpy of Mg is .

  1. −906 kJ/mol
  2. −856 kJ/mol
  3. +1450 kJ/mol
  4. +590 kJ/mol
JEE Main 2026 (Online) 4th April Evening Shift
4

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 true but Statement II is false
  4. Statement I is false but Statement II is true
JEE Main 2026 (Online) 2nd April Morning Shift
5

The correct set that contains all kinds (basic, acidic, amphoteric and neutral) of oxides is :

  1. Na2O, K2O, Al2O3 and As2O3
  2. Al2O3, As2O3, CO and NO
  3. K2O, Cl2O7, As2O3 and NO
  4. Na2O, N2O, Al2O3 and CO
JEE Main 2026 (Online) 2nd April Evening Shift
6

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 true but Statement II is false
  4. Statement I is false but Statement II is true
JEE Main 2026 (Online) 2nd April Evening Shift
7

In period 4 of the periodic table, the elements with highest and lowest atomic radii are respectively.

  1. Rb & Br
  2. Na & Cl
  3. K & Br
  4. K & Se
JEE Main 2026 (Online) 28th January Morning Shift
8

Consider the elements N, P, O, S, Cl and F. The number of valence electrons present in the elements with most and least metallic character from the above list is respectively.

  1. 7 and 5
  2. 6 and 7
  3. 5 and 7
  4. 5 and 6
JEE Main 2026 (Online) 28th January Evening Shift
9

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 false
  2. Statement I is false but Statement II is true
  3. Statement I is true but Statement II is false
  4. Both Statement I and Statement II are true
JEE Main 2026 (Online) 24th January Morning Shift
10

The correct order of C, N, O and F in terms of second ionisation potential is

  1. C < N < F < O
  2. C < F < N < O
  3. F < N < C < O
  4. C < O < N < F
JEE Main 2026 (Online) 24th January Evening Shift
11

The correct trend in the first ionization enthalpies of the elements in the 3rd period of periodic table is :

  1. Si < S < Al < P < Cl
  2. Al < Si < S < P < Cl
  3. S < Si < Al < P < Cl
  4. Al < S < P < Si < Cl
JEE Main 2026 (Online) 23rd January Morning Shift

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