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Iodine could be separated from the mixture of iodine and Calcium chloride by
Which of the following elements is a metalloid?
If acidified K\(_2\)Cr\(_2\)O\(_7\) acts as an oxidizing agent, the colour changes from
The nucleus of a hydrogen atom consists of
If a gas occupies a volume of 400cm\(^3\) at a temperature of 400K and a pressure of 1 atm, at what temperature and pressure would its volume be 200cm\(^3\)?
Both Na\(^+\) and K\(^+\) have
Which of the following gases is used in fire extinguishers?
Aluminum is extracted by
Nickel is used in the hydrogenation of alkenes because it
Which of the following pairs of gases cannot be collected by downward delivery?