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
Which of the following are covered by a single membrane?
Anonymous Quiz
27%
Mitochondria
49%
Vacoule
21%
Lysosome
3%
None
The relative molecular mass of Na2S2O3.5H2O is
Anonymous Quiz
21%
250amu
56%
248amu
19%
245amu
5%
Nome
What mass of carbon dioxide (CO2) will contain 3.011 × 1023 molecules?
Anonymous Quiz
18%
11.0 g
48%
22.0 g
25%
33.0 g
10%
44.0 g
How many times an atom of sulphur is heavier than an atom of carbon?
Anonymous Quiz
30%
1/3
44%
4/3
24%
8/3
3%
None
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