The gas which turns into liquid at the lowest temperature among the following is
1). hydrogen
2). oxygen
3). helium
4). nitrogen
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1. The lowest layer of earth's atmosphere is
2. What is a common name for the substance which irritates lachrymal glands ?
3. Bee sting contains________________
4. Which is the purest form of iron ?
5. The gas used for artificial fruit ripening of green fruit is
6. Atoms of same element having different mass numbers are called________
7. Bleaching powder is used in drinking water as a an
9. In addition to hydrogen the other abundant element present on Suns surface is
10. Which among the following metals provides amphoteric oxide ?