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  1. One property of ammonia is
    1. It is insoluble in water
    2. It is a odourless gas
    3. It is a yellowish gas
    4. Its aqueous solution turns red litmus blue
Correct Option: D

The main use of litmus is to test whether a solution is acidic or basic. For instance, ammonia gas, which is alkaline, colours the red litmus paper blue.



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