Question Text
Question 2 :
One of the key factors involved in the choice of a source of energy is:
Question 5 :
1 kg of ________ can light up $1$ bulb for $3\times10^4$ years.
Question 6 :
In an energy emitting nuclear reaction the binding energies of reactants and products are  $e_{1}$, $e_{2}$ respectively.Then which is  correct of the following ?<br/>
Question 8 :
Mixing up of air with materials, injurious to health, is termed as:
Question 10 :
When the nucleus of an atom is smashed it releases energy. This energy is commonly called :<br><br>
Question 14 :
Which of the following is not a consequence of exploiting the sources of energy?
Question 16 :
Fill in the blanks:1 kg coal can light up 1 bulb for _____ hours.<br/>
Question 18 :
The energy released due to loss in mass during the process of nuclear fission and fusion is called: