The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 2nd group and the 4th period?
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Sour taste of lemon is due to the presence of which of the following ?
Why is Carbon Monoxide a pollutant ?
What is the base of the Octal Numeral System?
The Chemical formula of Ammonium dichromate is _____.
____ is the most electropositive and ___ is the most electronegative element of the third period of modern periodic table.
Which of the following is used as anaesthetics?
Trinitrotoluene is
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