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1
NDA 2016 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
A glass vessel is filled with water up to the brin and a lid is fixed to it tightly. Then it is kept inside a freezer for hours. What is expected to happen?
A
The water freezes to ice and the level of ice comes down
B
The water in the glass vessel summer freezes to ice
C
The glass vessel breaks due to expansion as water freezes to ice
D
The water does not freeze at all
2
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?
A
Solution A
B
Solution B
C
Solution C
D
Solution D
3
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
4
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
$$Mg(s) + S(s)\buildrel {} \over \longrightarrow MgS(s)$$
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