NDA General Ability 10 April 2022

MCQ (Single Correct Answer)

-1.33

The mass number of argon is 40. Which one of the following statements is correct?

The number of protons in argon is 22.

The number of neutrons in argon is 18.

The number of electrons in argon is 18.

The sum of numbers of protons and electrons in argon is 40.

NDA General Ability 10 April 2022

MCQ (Single Correct Answer)

-1.33

Which one of the following is the correct order of the valencies of elements Ne, Si, N and Mg?

Ne < Mg < N < Si

Si < N < Mg < Ne

Ne < N < Si < Mg

Mg < Ne < N < Si

NDA General Ability 10 April 2022

MCQ (Single Correct Answer)

-1.33

Which one of the following reactions is an example of decomposition reaction?

CH4 (g) + 2O₂ (g) → CO2(g) + 2H2O(g)

2AgCI(s) $\rm \xrightarrow{Sunlight} $ 2Ag(s) + CI₂(g)

CuO + H₂$\rm \xrightarrow{Heat} $ Cu + H₂O

Fe(s) + CuSO₄ (aq) → FeSO₄ (aq) + Cu(s)

NDA Subjects

English

General Science

General Studies