NDA 2016 Paper 1 | Chemistry Question 38 | General Science

NDA 2016 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

Suppose you have four test tubes labelled A, B, C and D. A contains water, B contains solution of an alkali, C contains solution of an acid, and D contains solution of sodium chloride. Which one of these solutions will turn phenolphthalein solution pink?

Solution A

Solution B

Solution C

Solution D

NDA 2016 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

An tom of carbon has 6 protons. Its mass number is 12. How many neutrons are present in an atom of carbon?

NDA 2016 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following following is a reduction reaction?

$$2Mg(s) + {O_2}(g)\buildrel {} \over \longrightarrow 2MgO(s)$$

$$S(s) + {O_2}(g)\buildrel {} \over \longrightarrow S{O_2}(g)$$

$$2HgO(s)\buildrel {Heat} \over \longrightarrow 2Hg(l) + {O_2}(g)$$

$$Mg(s) + S(s)\buildrel {} \over \longrightarrow MgS(s)$$

NDA 2016 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following oxides of nitrogen is known as 'anhydride' of nitric acid?

N₂O

N₂O₃

NO₂

N₂O₅

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