Noble gases are named so because they are__________________?
A. less reactive B. Zero group elements C. Having completely filled valence shell D. All
Chemistry MCQs
The longest period in the modern periodic table is___________________?
A. 6th B. 7th C. 2nd and 3rd both D. 5th
Seventh period contains _________________ normal elements ?
A. 2 B. 4 C. 6 D. 8
Modern periodic table has been divided in ___________ blocks?
A. 2 B. 4 C. 8 D. 7
Amphoteric exides are those which possess ____________ properties?
A. Acidic B. Basic C. Acidic and basic D. Neutral and acidic
Hydrogen resembles with carbon because of having________________?
A. Same number of electrons in the valence shell B. Similar physical state C. Remarkable reducing properties D. Homovalent (show same valency)
In which of the following pairs are elements belonging to the same group ?
A. Boron & Beryllium B. Nitrogen & Phosphorous C. Magnesium & Aluminium D. Gallium & Helium
Which one of the following is not a periodic property ?
A. Melting point of elements B. Boiling point of elements C. Ionization energy of elements D. Coordination number of ions
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 property which increases upto group IV-A then decreases on wards_______________?
A. Ionization energy B. Atomic radii C. Melting & boiling points D. Atomic volume