NDA 2018 Paper 2 | Chemistry Question 91 | General Science

General Science

Physics

Chemistry

Biology

NDA 2018 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following is an oxidation-reduction reaction ?

NaOH + HCl $$\to$$ NaCl + H₂O

CaO + H₂O $$\to$$ Ca(OH)₂

2Mg + O₂ $$\to$$ 2MgO

Na₂SO₄ + BaCl₂ $$\to$$ BaSO₄ + 2NaCl

NDA 2018 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following is not used as fertilizer?

Ammonium nitrate

Ammonium sulphide

Ammonium phosphate

Ammonium sulphate

NDA 2018 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following is the chemical formula of gypsum?

CaSO₄ . 2H₂O

Ca₂SiO₄

2CaSO₄ . H₂O

CaSO₄

NDA 2018 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following statements about the law of conservation of mass is correct?

A given compound always contains exactly same proportion of elements.

When gases combine in a reaction, they do so in a simple ratio by volume, provided all gaseous are at room temperature.

Matter can neither be created nor be destroyed.

Equal volumes of all gases at same temperature and pressure contain equal number of molecules.

Questions Asked from Marks 2.5