Q1. Acid rain contains high levels of

Q2. Which one of the following would give the highest energy per gram?

Q3. Which one of the following units represents the largest amount of energy?

Q4. A woman's voice is shriller than a man's due to

Q5. Which gas is used in the preparation of soft drinks?

Q6. Why are soft drinks made with chilled water rather than water at room temperature?

Q7. Coke is made by heating coal in the absence of air at

Q8. In blood, the percentage of water is

Q9. As the temperature of ice rises, the ice melts and its density

Q10. Water is a universal solvent for what reactions.

Q11. The volume percentage of nitrogen in air is

Q12. Nitrogen occur in plants and animals in the form of

Q13. Air contains volume of carbon dioxide approximately;

Q14. The gases which are used by divers as an artificial atmosphere are helium and;

Q25. The second most abundant metal found in the earth's crust is.

Q16. Which of the following is involved in

Q17. For water purification, we use

Q18. Deficiency of chloride cause the impaired growth in

Q19. The human blood is divided into

Q20. Which type of blood of individuals are known as universal donor.