Which among the following is exclusively marine?
Anonymous Quiz
22%
Porifra
43%
Echoniermta
30%
Mollusca
6%
None
In which group of animals, coelom is filled with blood?
Anonymous Quiz
28%
Arthrpoda
38%
Annelida
30%
Mollusca
4%
None
Rutherford’s ‘alpha (α) particles scattering experiment’ resulted in the discovery of
Anonymous Quiz
45%
Nucleus in atom
33%
Nucleus in electron
17%
Nucleus in proton
5%
None
The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?
Anonymous Quiz
28%
13
40%
10
24%
14
8%
16
How many electrons are present in M-shell of an element with atomic number 20?
Anonymous Quiz
11%
4
53%
8
20%
12
16%
18
The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?
Anonymous Quiz
24%
13
53%
10
16%
14
7%
16
A boy goes from A to B with a velocity of 20 m/min and comes back from B to A with a velocity of 30 m/min. The average velocity of the boy during the whole journey is
Anonymous Quiz
17%
24
51%
25
15%
27
17%
None
Velocity is defined as ……………. per unit time.
Anonymous Quiz
21%
Distance
68%
Displacement
8%
Velocity
3%
None
If speed of a body is continuously decreasing, the body is said to
Anonymous Quiz
50%
Retarding
34%
Acceleration
9%
Distance
6%
Displacement