Chemistry · NDA previous year questions

2012 28 questions

1. Q822012 · 15 Apr 2012

   Which one among the following is the most appropriate statement with respect to the atomic weight of an element?

   1. A.The atomic weight of an element is the sum total of the number of protons and neutrons present in the atom of the element
   2. B.Unlike mass number, the atomic weight of an element can be a fraction
   3. C.The atomic weight of an element is a whole number
   4. D.The atomic weight of all the atoms in an element is the same
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   Answer: B

2. Q952012 · 15 Apr 2012

   Two metallic wires A and B are of same material and have equal length. If the cross-sectional area of B is double that of A, then which one among the following is the electrical resistance of B?

   1. A.Twice that of A
   2. B.4 times that of A
   3. C.$\frac{1}{4}$ that of A
   4. D.$\frac{1}{2}$ that of A
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   Answer: D

3. Q1002012 · 15 Apr 2012

   Which one among the following is the major constituent of soda lime glass?

   1. A.Sodium oxide
   2. B.Calcium oxide
   3. C.Calcium carbonate
   4. D.Silica
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   Answer: D