(a) A blackish brown coloured solid ‘A’ when fused with alkali metal hydroxides in presence of air, produces a
cooking of food is a physical change or chemical change??why??
an inflated air ballon deflates when pricked with a pin. which property of the gaseous state is shown
why MgSO4 soluble in water whereas BaSO4 is insoluble in water?
when sugar is dissolved in water there is no increase in volume.comment
calculate the number of g-molecules in the following:
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