Which of the following statements is INCORRECT?
I) Bleaching powder is a pale yellow powder
II) Dry NH3 gas turns red litmus blue
III) The pH of rain water is nearly 7
IV) The pH of acid rain is nearly 5.6
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What is the purpose of adding Gypsum to the cement?
How many molecules are present in one mole of water?
Which of the following element is NOT a metal?
Which of the following is an example of compound?
Charge on proton is equal to the charge on ______.
Which substance is produced when alcohol is added with petrol and used as a fuel?
Which of the following is a non metal that remains liquid at room temperature ?
The chemical element with the atomic number 35, Bromine is a non metal that remains liquid at room temperature. Mercury also remains liquid at room temperature but it is a metal. Bromine is the third lightest halogen.
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