1
NDA 2017 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Temporary hardness in water is due to which one of the following of calcium and magnesium?
A
Hydrogen carbonates
B
Carbonates
C
Chlorides
D
Sulphates
2
NDA 2017 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Which one of the following elements is least reactive with water?
A
Lithium
B
Sodium
C
Potassium
D
Cesium
3
NDA 2017 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Rutherford's alpha-particle scattering experiment was responsible for the discovery of
A
electron
B
proton
C
nucleus
D
helium
4
NDA 2017 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Glass is a
A
liquid
B
colloid
C
non-crystalline amorphous solid
D
crystalline solid
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