One of the constituents of tear gas is
1). Ethane
2). Ethanol
3). Ether
4). Chloropicrin
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1. When cone H2S04 is added to dry KNO3 brown fumes are evolved. These fumes are due to
2. For photoelectric effect to take place, the metal used as the cathode should have_________
4. Question 2.24:What is the lowest value of n that allows g orbitals to exist?
5. Water is not effective in extinguishing a fire caused by petrol because
6. Atomic number of which of the following elements is greater than that of Aluminium?
7. The chiefsource for the production of nitrogeneous fertilizers is :