Wednesday, August 27, 2014

Objective Questions - General Science - 27 August 2014

1. The mass number of a nucleus is ________________________________.
[A]The sum of the number of protons and neutrons present in the nucleus
[B]Always less than its atomic number
[C]A fraction
[D]Always more than its atomic number

2. The material that can be permanently deformed by heat and pressure is called _________________.
[C]Thermoplasticxdddddddddddddd[D]Chemical compound

3. What is the maximum number of covalent bonds formed by nitrogen?

4. Which metal is usually extracted from sea water?

5. What is the method of concentrating the ore which makes use of the difference in density between ore and impurities called?
[D]Magnetic Separation