Muscles get tired when there is shortfall of ___________.
1). Lactic acid
2). Na+ ions
3). ATP
4). Sulphates
1. Which one of the following contributes largely to the greenhouse effect
2. The term 'brown air' is used for
3. What is an endothermic reaction?
5. Question 4.1:Explain the formation of a chemical bond.
7. The main constituent of biogas is
8. Which among the following is a carbohydrate
9. The basic chemical building block of natural rubber obtained from trees is