Question : During fertilisation in living beings, the fusion of male and female gametes takes place to form a cell called:

Option 1: Zygote

Option 2: Ovum

Option 3: Embryo

Option 4: Sperm

Question : The charge has to be passed ______ to obtain maximum work from a galvanic cell.

Option 1: proportionately

Option 2: inversely

Option 3: reversibly

Option 4: uniformly

Question : A cell increases in volume when it is placed in

Option 1: Hypertonic solution

Option 2: Hypotonic solution

Option 3: Isotonic solution

Option 4: None of these

Question : The metal cap of an electric cell is generally the ____________ terminal of the electrical cell.

Option 1: negative

Option 2: positive

Option 3: neutral

Option 4: devoid

Question : A swimming pool has 3 drain pipes. The first two pipes A and B, operating simultaneously, can empty the pool in half the time that C, the 3^rd pipe, alone takes to empty it.  Also pipe A, working alone, takes half the time taken by pipe B. Together they take 6 hours 40 minutes to empty the pool. The time taken by pipe A to empty the pool, (in hours) is:

Option 1: 15 hours

Option 2: 10 hours

Option 3: 30 hours

Option 4: 7 hours