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.Management Sciences
Category: Periodic Classification
Which discovery caused a revision in the periodic law as stated by Mendeleev ?
A. Location of nucleus by Rutherford
B. Atomic number by Moseley
C. X-rays by Roentgen
D. Natural radioactivity by Henry Bacquerel.
The atomic radii decreases by increasing atomic number in________________?
A. Alkali metal
B. Alkaline earth metal
C. Elements from Li to Ne
D. Halogens
An element has electronic conviguration 1s2 2s2 2p2. It belongs to__________________?
A. Group II-A
B. Group IV-A
C. Group VII-A
D. Group VI-A
Metallic characters of alkali metals_____________________?
A. Increase down the group
B. Decrease down the group
C. No regular trend
D. Remain same
Shielding effect across the period_________________?
A. Increases
B. Decreases
C. Can not be predicted
D. Remains constant
Among halogens the highest boiling point is of___________________?
A. Flrorine
B. Chlorine
C. Bromine
D. Iodine
True increasing order of acidity of the oxides of Mn is_________________?
A. MnO < MnO2 < Mn2O7
B. Mn2O7 > MnO2 > MnO
C. MnO2 > MnO > Mn2O7
D. MnO2 > Mn2O7 > MnO
Best position of hydrogen in the periodic table is above I.A Group which is mainly due to_______________?
A. Both are electropositive
B. Similar outer most shell electronic configuration
C. Both form ionic compounds
D. All
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