The coloured discharge tubes foradvertisement mainly contain
1). Xenon
2). Argon
3). Helium
4). Neon
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1. Which one is the most reactive halogen?
2. Alcohol prepared by the distillation of wood is :
3. Which is not a green house gas ?
4. Which among the following is a carbohydrate ?
5. Ethylene is a ________ molecule.
6. Atomic number of which of the following elements is greater than that of Magnesium
7. The depletion of ozone layer is due to
8. Nitrogen in water is commonly?found in the form of :
9. Question 6.18:For the reaction,2Cl(g) → Cl2(g), what are the signs of ΔH and ΔS ?
10. The chief source for the production of nitrogeneous fertilizers is :