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Periodic Classification Of Elements(General Knowledge > General Science ) Questions and Answers
Home
Topic
General Knowledge
General Science
Periodic Classification Of Elements
Question 1.
An element M is in group 13th of the periodic table, the formula for its oxide is
MO
M2O3
M3O2
None
Explanation:-
Answer: Option B. ->
M2O3
Question 2.
Choose the correct statement from the following:
Mendeleev considered oxides and halides made by elements as criteria for classification
Newland's law of octaves was valid upto the element vanadium
Doberieneer could identify only 5 triads
modern periodic table removed the anomaly of position of isotopes
Explanation:-
Answer: Option D. ->
modern periodic table removed the anomaly of position of isotopes
Question 3.
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
Explanation:-
Answer: Option B. ->
Decreases
Question 4.
The properties of eka-aluminium predicted by Mendeleev are the same as the properties of later discovered element
Scandium
Germanium
Gallium
Aluminium
Explanation:-
Answer: Option C. ->
Gallium
Question 5.
At the time of Mendeleev, the number of elements known was
62
61
63
56
Explanation:-
Answer: Option C. ->
63
Question 6.
_____ group contains the member ofhalogen family
17th
15th
18th
16th
Explanation:-
Answer: Option A. ->
17th
Question 7.
Chemical formula of rust is ________
FeO.xH2O
FeO4.xH2O
Fe2O3.xH2O
FeO
Explanation:-
Answer: Option C. ->
Fe2O3.xH2O
Question 8.
If the distance between two Cl atoms in Cl2molecule is 1
0.99 Å
0.09 Å
0.90 Å
0.98 Å
Explanation:-
Answer: Option A. ->
0.99 Å
Question 9.
Upto which element, the Law of Octaves was found applicable?
CALCIUM
MAGNESIUM
ALUMINIUM
POTASSIUM
Explanation:-
Answer: Option A. ->
CALCIUM
Question 10.
Which of the following belong to same period?Element A B C D EAtomic No 3 2 14 9 6
DEA
BCD
ABC
ADE
Explanation:-
Answer: Option D. ->
ADE
1
2
3
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