1
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
2
NDA 2016 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The LPG cooking gas contains propane and butane as the constituents. A sulphur containing compound is added to the LPG, because
A
it lowers the cost of production
B
it enhances the efficiency of LPG
C
it facilitates easy detection of leakage of the gas
D
it assists in liquefying hydrocarbons
3
NDA 2016 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
A plant having yellow leaves with dead spots has the deficiency of
A
potassium
B
magnesium
C
nitrate
D
phosphate
4
NDA 2016 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Fluoride toothpaste is sometimes recommended, because fluoride
A
prevents plaque formation
B
hardens the enamel of the tooth
C
kills pathogenic bacteria
D
prevents toothache
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