Question
Zinc metal liberates hydrogen gas on reaction with
dilute HCl, but hydrogen gas is not liberated, when zine is reacted with nitric acid. What is the reason for this observation?Solution
The correct answer is A
The rate of change of which of the following determines angular velocity?
If cream is removed from milk, its density –
Proteins are assembled from how many amino acids?
Kindly Study the following questions carefully and choose the right answer:
Transpiration is mainly effective during _______ ?
Group number and valency have no relation in
Two charges +4μC and +9μC are separated by 60 cm. Where should a third charge be placed so that it experiences zero net force? (from +4μC charge)
Which electromagnetic wave has the longest wavelength?
The centre of gravity of a sprinter during the race lies –
The SI unit of surface tension is: