Which of the following gases will effuse out of football bladder most quickly?
1). He
2). H2
3). N2
4). 02
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1. Detergents used for cleaning clothes and utensils contain
2. Which of the following is an iron ore ?
3. Which of the following could be used as fuel in propellant or rockets ?
4. Which one of the following is an example of a gel ?
5. The metal extracted from Bauxite is :
8. Which one of the following minerals is found in pure form?