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1. Question marks are mentioned with each Question.
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5. This is a ONE TIME attempt test. Once started, it cannot be reversed or attempted again.
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1
If the element has 1 electron in its outermost shell than it is ___________ in nature.
Stable
Unreactive
Reactive
Act as inert gas
2
The ion of oxygen is a _____________.
Anion
Cation
Neutral
None of these
3
If the element have 8 electrons in its outermost shell than it is _____________ in nature.
Most reactive
4
How many isotopes are there in hydrogen atom ?
5
Which of the following is the ion of calcium?
Ca
Ca+
Ca2+
Ca3+
6
Starting from nucleus, energy levels (orbits) are represented by numbers or by ______________________.
Symbols
Alphabets
Small letters
7
If the element have 3 electron in its outermost shell then it is ___________ in nature.
8
The maximum electron present in L-shell are ____________.
12
16
9
The maximum electron present in N-shell are ____________.
18
28
32
36
10
Which of the following are isobars ?
Argon and Potassium
Potassium and Calcium
Calcium and Argon
All of these
11
Which of the following statement / statements are correct :
(a) The outermost electron in hydrogen is 1.
(b) The outermost electron in carbon is 4.
Only (a) is correct.
Only (b) is correct.
Both (a) and (b) are correct.
None of these.
Which of the following are correct :
(a) An isotope of iodine (I-131) is used in the treatment of goiter.
(b) An isotope of cobalt (Co-60) is used to remove brain tumours and in the treatment of cancer.
13
(a) We can easily separate the noble gases by finding there electronic configuration because its outermost shell is completely filled.
(b) Elements like Helium, Lithium, Krypton are noble gases.
14
(a) Atoms of different elements with different atomic numbers but same mass number are known as isobars.
(b) Atoms of different elements with different atomic numbers but same mass number are known as isotopes.
(c) Atoms of different elements with different atomic numbers but same mass number are known as isotones.
Only (b) and (c) are correct.
Only (a) and (c) are correct.
All of these.
15
(a) Sodium and calcium can lose one and two electrons respectively from their outermost shells to have an octet.
(b) Boron have 3 electrons in its outermost shell.
(c) The ions with negative charge are known as anion or negative ions.
Only (c) is correct.