NDA 2016 Paper 1 | Chemistry Question 39 | General Science | NDA - ExamSIDE.com

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1

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?

A

12

B

6

C

10

D

14

2

NDA 2016 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following following is a reduction reaction?

A

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

B

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

C

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

D

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

3

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?

A

N₂O

B

N₂O₃

C

NO₂

D

N₂O₅

4

NDA 2016 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following is the chemical name for baking soda?

A

Sodium bicarbonate (sodium hydrogen carbonate)

B

Sodium carbonate

C

Potassium bicarbonate (potassium hydrogen carbonate)

D

Potassium carbonate

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