Which of the following in automobile exhaust can cause cancer?
1). Oxides of nitrogen
2). Carbon monoxide
3). Lead
4). Polyclinic hydrocarbons
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1. Two elements which can form a large number of compounds are
3. Question 5.22:What is shape selective catalysis?
4. The greenhouse effect is caused by the higher level of which gas in the atmosphere ?
5. Ozone depletion in the atmosphere is mainly caused by
6. Which one of the following is used for dating very old objects of archaeological importance?
7. The pH of human blood is between
8. One of the following is used to dissolve noble metals. That is
9. Acid rain is caused due to emission of which of the following into the atmosphere ?