Keeg in view the size of atom which order is correct one ?
A. Mg > Sr
B. Ba > Mg
C. Lu > Ce
D. C1 > I
Periodic Classification
Iodine is solid due to_________________?
Iodine is solid due to_________________?
A. Strong covalent bond
B. Large value of dipole moment
C. High polarizability
D. Strong hydrogen bonding
Halides in which halogen atoms act as a bridge between two atoms of the other element are called___________________?
Halides in which halogen atoms act as a bridge between two atoms of the other element are called___________________?
A. Covalent halides
B. Electronegative halides
C. Polymeric halides
D. Polymeric hydrides
Oxidation state of an atom represents____________________?
Oxidation state of an atom represents____________________?
A. Number of electrons gained
B. Number of electrons lost
C. Apparent charge in compound
D. Its vacancies
Metallic characters of alkali metals_____________________?
Metallic characters of alkali metals_____________________?
A. Increase down the group
B. Decrease down the group
C. No regular trend
D. Remain same
Addition of 2nd electron to a uni negative ion is always____________________?
Addition of 2nd electron to a uni negative ion is always____________________?
A. Exothermic
B. Endothermic
C. Data is insufficient
D. Unpredictable
Ionization energy depends upon____________________?
Ionization energy depends upon____________________?
A. Nuclear charge
B. Atomic size
C. Shielding effect
D. I.E depends upon all of the above and nature of orbital
Deuterium reacts with oxygen to form________________?
Deuterium reacts with oxygen to form________________?
A. Hard water
B. Heavy water
C. Soft water
D. Water gas
The property which increases upto group IV-A then decreases on wards_______________?
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
Which discovery caused a revision in the periodic law as stated by Mendeleev ?
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.