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Periodic Classification Of Elements
Quiz 2
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Q.1
Upto which element, the Law of Octaves was found applicable?
CALCIUM
MAGNESIUM
ALUMINIUM
POTASSIUM
Q.2
Which of the following is the outermost shell for elements of period 2 ?
K
L
M
N
Q.3
According to Mendeleev periodic law, the elements were arranged in the Periodic table in order of
Increasing atomic number
Decreasing atomic number
Increasing atomic mass
Decreasing atomic mass
Q.4
In Mendeleev periodic table,gaps were left for the elements to be discovered later. Which of the following elements found a place in the Periodic table later
Germanium
Chlorine
Oxygen
Silicon
Q.5
On moving from left to right in a period in the Periodic table, the size of atom
Increases
Decreases
Does not change appreciably
First decreases and then increases
Q.6
Which one of the following elements do not constitute a Doebereiner's triad ?
Cl,Br, I
Li,Na,K
S,Se,Te
N,P,As
Q.7
In the second period of periodic table____________ has the largest size.(excluding noble gases Ne)
Lithium
Both
Li
Q.8
How many groups present in modern Periodic table ?
7
18
8
14
Q.9
The chemical properties of calcium (Ca) are similar to those of .......................
19K
12Mg
25Mn
3Li
Q.10
Noble gases were included in Mendeleev's periodic table in the
1st Group.
7th Group.
8th Group.
None of these
Q.11
According to the periodic Law of elements, the variation in properties of elements is related to their
nuclear masses.
atomic number.
nuclear neutron-proton number ratios.
atomic masses.
Q.12
Newlands could classify elements only upto
Copper.
Chlorine.
Calcium.
Chromium.
Q.13
An element M is in group 13th of the periodic table, the formula for its oxide is
MO
M2O3
M3O2
None
Q.14
Which of the following is the correct order of the atomic radii of the elements oxygen, fluorine and nitrogen?
O < F < N
N < F < O
O < N < F
F < O < N
Q.15
The electronic configuration of an element M isIn modern periodic table, the element M is placed in
4 group
2 group
14 group
18 group
Q.16
What happens to the electropositive character of elements on moving from left to right in a periodic table?
Increases
Decreases
First increases than decreases
First decreases than increases
Q.17
Cl, I if these are the Dobereiner’s triad and the atomic masses of chlorine and the Iodine are 35,5 andrespectively. The atomic mass & the particular element is?
Ar, 40
F,19
Br, 81.25
At, 210
Q.18
Dobereiner tried to arrange the elements with similar properties into group. So, he called the groups “_______” Octaves
Octaves
Triad
Metals
Non-Metals
Q.19
If the distance between two Cl atoms in Cl2molecule is 1.98Å, then the radius of Clatom is ________.
0.99 Å
0.09 Å
0.90 Å
0.98 Å
Q.20
Chemical formula of rust is ________.
FeO.xH2O
FeO4.xH2O
Fe2O3.xH2O
FeO
0 h : 0 m : 1 s
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