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Foundation Course with Case Study Approach in Physics, Chemistry, Mathematics, Biology & Mental Ability for JEE/ NEET/ Olympiad…
Most of the competitive exams are designed to test the aptitude, comprehension or the analytical abilities of students. The basic difference between boards and Competitive Exams is that where the Boards are focused on the knowledge & understanding of a subject…
Which of the following correctly represents the electronic distribution in the Mg atom?
Anonymous Quiz
12%
3,8,1
28%
2,8,1
52%
2,8,2
9%
2,8,3
Rutherford’s ‘alpha (α) particles scattering experiment’ resulted in the discovery of
Anonymous Quiz
23%
Electron
53%
Nucleus in atom
17%
Proton
7%
Nucleus in neutron
👍1
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
35%
13
41%
10
17%
14
8%
6
How many electrons are present in M-shell of an element with atomic number 20?
Anonymous Quiz
9%
5
63%
8
18%
12
10%
20
Which of the following would weigh the highest?
Anonymous Quiz
18%
2 mol of co2
47%
2 mol of caco3
30%
10 mol of h20
4%
None
Which of the following has maximum number of atoms?
Anonymous Quiz
32%
18 g of co4
31%
18 g of co3
28%
18 g of co2
9%
18 g of co
The relative molecular mass of Na2S2O3.5H2O is
Anonymous Quiz
27%
250 amu
31%
250g
32%
248 amu
10%
248 g
What mass of carbon dioxide (CO2) will contain 3.011 × 1023 molecules?
Anonymous Quiz
19%
11.0g
39%
22.0g
30%
33.0g
12%
44.0g
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A form of matter has no fixed shape but it has a fixed volume. An example of this form of matter is
Anonymous Quiz
16%
Krypton
35%
Kerosene
28%
Carbon monoxide
22%
Oil
Which of the following cannot be considered a form of matter
Anonymous Quiz
16%
Atom
19%
Water
50%
Humidity
15%
Electron