The phenomenon of change of a liquid into the gaseous state at any temperature below its boiling point is called ………………
Anonymous Quiz
29%
Heating
19%
Cooling
44%
Evaporation
8%
Osmosis
Which of the following are covered by a single membrane?
Anonymous Quiz
40%
Mitochondria
33%
Vacoule
20%
Lysosome
7%
Plastid
A particle is moving in a circular path of radius r. The displacement after half a circle would be:
Anonymous Quiz
26%
Zero
39%
πr
31%
2r
4%
None
Area under a υ -1 graph represents a physical quantity which has the unit
Anonymous Quiz
37%
M
31%
R
18%
Q
14%
None
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
29%
24
34%
26
16%
28
21%
None
👍1
Velocity is defined as ……………. per unit time.
Anonymous Quiz
23%
Distance
59%
Displacement
15%
Speed
3%
Time
Which of the following correctly represents the electronic distribution in the Mg atom?
Anonymous Quiz
36%
282
35%
281
15%
278
14%
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
32%
13
38%
10
22%
14
8%
16
How many electrons are present in M-shell of an element with atomic number 20?
Anonymous Quiz
10%
5
53%
8
18%
12
19%
18
👎2
Cathode rays consist of negatively charged particles known as ………………
Anonymous Quiz
62%
Electrons
22%
Proton
15%
Neutron
2%
None
😁2