Which of the following metals occurs In free state ?
1). Copper
2). Iron
3). Zinc
4). Lead
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1. Which one of the following is known as the 'brown coal'?
2. What is the accounting year of the Reserve Bank of India ?
3. Which one among the following is not a mixture?
5. Which of the following is chiefly present in LPG (Liquefied Petroleum Gas)
6. Which of the following substance is highly plastic ?
7. At high altitudes the boiling point of water lowers because-
8. The main constituent of biogas is
9. Which of the following gases will effuse out of football bladder most quickly?