Which of the following is used in the preparation of tincture iodine, cough syrup and many tonics?
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Which of the following metals displaces Iron from Iron Chloride?
The number of neutrons present in a nitrogen atom is ___.
What is the action of dry HCl gas on dry litmus paper?
Which of the below options is called a laughing gas?
The percentage of nitrogen in the air is about
In a water molecule, the ratio of mass of Hydrogen to the mass of Oxygen is always:
Which of the following is not a constituent of biogas?