NDA 2019 Paper 1 | Chemistry Question 131 | General Science

General Science

Physics

Chemistry

Biology

NDA 2019 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following could be the melting point of iron?

25$$^\circ$$C

37$$^\circ$$C

500$$^\circ$$C

1500$$^\circ$$C

NDA 2019 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following statements is not correct for the given reaction?

Fe(s) + CuSO₄ (aq) $$\to$$ FeSO₄ (aq) + Cu (s)

Iron is the reducing agent

The solution turns green in colour after the reaction

Copper is a more reactive metal than iron

The reaction is an example of a redox reaction

NDA 2019 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following is an organic acid?

Hydrochloric acid

Nitric acid

Acetic acid

Sulphuric acid

NDA 2019 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

Dinitrogen (N₂) and dioxygen (O₂) are the main constituents of air, but they do not react with each other to form oxides of nitrogen because,

the reaction requires initiation by a catalyst

oxides of nitrogen are unstable

the reaction is endothermic and requires very high temperature

the stoichiometry of N₂ and O₂ in air is not ideal for the reaction to take place

Questions Asked from Marks 2.5