1
NDA 2016 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
There are six electrons, six protons and six neutrons in an atom of an element. What is the atomic number of the element?
A
6
B
12
C
18
D
24
2
NDA 2016 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Which one of the following has different number of molecules? (All are kept at normal temperature and pressure)
A
3 g of hydrogen
B
48 g of oxygen
C
42 g of nitrogen
D
2 g of carbon
3
NDA 2016 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Which one of the following statements is correct?
A
Covalent bonds are directional
B
Ionic bonds are directional
C
Both covalent and ionic bonds are directional
D
Both covalent and ionic bonds are non-directional
4
NDA 2016 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
When one strikes a safety match, the first step is
A
burning of sulphur
B
decomposition of potassium chlorate into potassium chloride and oxygen
C
conversion of a small amount of red phosphorus into white phosphorus
D
burning of glue and starch
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