Which of the following is riot a greenhouse gas ?
1). Hydrogen
2). Carbon dioxide
3). Nitric oxide
4). Chlorofluorocarbon
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1. The BOD values of water indicate the
2. Which of the following is the petroleum wax ?
3. The most important ore of lead is
5. Which one element from below list is liquid at room temperature?
6. Which of the following Sultans of Tughlaq dynasty issued copper coins instead of silver ones?
7. In arc welding, Argon is used because of its
8. The element which is commonly used in nuclear for producing electricity by nuclear fission is