Correct answer
D. 4
Explanation
4 is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Downs cell is used to prepare_________________?
Bleaching powder is not used for bleaching________________?
The partial pressure exerted by the water vapours is called_______________?
24g of an unknown gas occupied 8.4dm3at STP, Identify the gas among the following
When electrons collide with heavy metals than ___________ are produced?
Secondary cell is_____________________?