Technique of separating two or more colours of a dye.
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21%
Sublimation
26%
Filteration
46%
Chromotography
6%
None
Ice, water and water vapour look different and display different ………….
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63%
Physical
37%
Chemical
Which cell does not have perforated cell wall?
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21%
Trachied
30%
Sieve tube
32%
Companion cells
17%
Veseesls
Rutherford’s ‘alpha (α) particles scattering experiment’ resulted in the discovery of
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46%
Nucleus in atom
30%
Nucleus in molecule
20%
Electron
4%
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?
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26%
13
51%
10
18%
14
5%
16
How many electrons are present in M-shell of an element with atomic number 20?
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10%
5
55%
8
19%
12
17%
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?
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23%
13
57%
10
16%
14
3%
16