Among the following the maximum covalent character is shown by the compound
(1)MgCl2
(2)FeCl2
(3)SnCl2
(4) AlCl3
According to Fajans rule, cation with greater charge and smaller size favours covalency.
The compound used in prickly-heat powder to prevent excessive sweating is
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The elements known as primary nutrients for plants
Which among the following will be a negative ion?
Isobars have _______.
Who invented the modern periodic table?
The absolute zero is a temperature at which _______
Which of the following is not a nitrogenous fertiliser?
Which one of the following nonmetals shows allotropy in the liquid state?