531. A specie with maximum number of unpaired electrons ?
A. F
B. H2O
C. HF
D. NH-2

532. Force responsible to hold atoms together in a compound is called ________________?
A. Bond
B. Attractive force
C. Interaction
D. All of above represent same entity

533. In a period the atomic radius ?
A. Increases
B. Decreases
C. Remain same
D. First decreases then increases

534. Energy required to remove electron from an atom______________?
A. Ionization potential
B. Electronegativity
C. Electron affinity
D. Activation energy

535. Greater shielding effect corresponds to ionization energy value___________________?
A. Greater
B. Lesser
C. Remain same
D. No effect

536. Energy released or absorbed when electrons are added in atom is_________________?
A. Ionization potential
B. Electronegativity
C. Electron affinity
D. Activation energy

537. Elements of group IA IIA are _________________?
A. Electronegative
B. Electropositive
C. Neutral
D. IA is electropositive while IIA is electronegative

538. Mostly ionic compound are produced in between elements of_________________?
A. IA and VIA
B. IA IIA and VIIA
C. IB and VIIB
D. IA and IB

539. The Lewis acids are__________________?
A. Electron deficient
B. Electron rich
C. Octet is complete
D. No such acids exist

540. The geometry of ammonia is___________________?
A. Tetrahedral
B. Square planner
C. Trigonal bipyramidal
D. Trigonal Pyramidal