Upto which element, the Law of Octavees was found to be applicable.
Oxygen
Calcium
Cobalt
Potassium
In Mendeleev’s 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?
Oxygen
Chlorine
Silicon
Gemanium
At the time of Mendeleev, the number of elements known was
65
63
64
62
The arrangement of elements in the Modem Periodic Table is based on their
increasing atomic mass in the period
increasing atomic number in the horizontal rows
increasing atomic number in the vertical columns
increasing atomic mass in the group
Where would you locate the element with electronic configuration 2, 8 in the Modern Periodic Table?
Group 8
Group 18
Group 2
Group-10
Element ‘X’ forms a chloride with the formula XCl2, which is a solid with high melting point. X would most likely be in the same group of the periodic table as:
Si
Mg
Al
Na
Which of these belong to the same period? Element A B C Atomic number 2 10 5
A, B
B, C
C, A
A, B and C
Pick out the chemically most reactive elements from the given triads. Li, Na, K F, Cl, Br
Li and F
Li and Br
K and F
K and Br
Which among the following elements has the largest atomic radii?
Na
Mg
K
Al
Which of the following elements does not lose electron easily?
Na
F
Mg
Al
Chlorine (17) belongs to which group and period
17,3
17,4
16, 4
16, 3
Which of the following elements will form an acidic oxide?
An element with atomic number 7
An element with atomic number 3
An element with atomic number 12
An element with atomic number 19
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. to which of the following categories does the element belongs?
Metal
Metalloid
Non-metal
Non
An element 'X' belong to third period and second group of the modern Periodic table. (a) Write its electronic configuration. (b) is it a metal or non-metal?
(a) 2,8,2 (b) Metal
(a) 2,8,1 (b) Metal
(a) 2,8,2 (b) Non-Metal
(a) 2,8,1 (b) Non-Metal
The elements A, B and C belong to groups 1, 14 and 17 respectively of the Periodic Table. Which two elements will form ionic compounds?
A and B
A and C
B and C
None
An element X from group 2 of the Periodic Table reacts with Y from group 17 to form a compound. Give the formula of the compound.
XY2
XY
X2Y
(XY)2
An element ‘A’ belongs to the third period and group 16 of the Periodic Table. Find out the valency of A.
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ReplyDeleteIt's a very nice quiz for srudends who appeared in board and also for all competitive exams
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