1
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The symbol of the element 'tungsten' is
A
Ta
B
W
C
Tl
D
Tc
2
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Which one of the following statements is correct?
A
Rutherford's $$\alpha$$-particle scattering experiment led to the discovery of electron
B
J.J. Thomson suggested that the nucleus of an atom contains
C
The atomic number of an element is the same as the number of protons in the nucleus of its atom
D
The mass number of an atom is equal to the number of electrons in its shells
3
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The alkali metals have relatively low melting point. Which one of the following alkali metals is expected to have the highest melting point?
A
Li
B
Na
C
K
D
Rb
4
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Consider the following reaction,

$$C{H_4}(g) + {H_2}(g)\buildrel {1270\,K} \over \longrightarrow CO(g) + 3{H_2}(g)$$

In the reaction given above, the mixture of CO and H2 is
A
natural gas
B
water gas
C
producer gas
D
industrial gas
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