In which of the following the central atom does not achieve an octet of electrons?

• HCl

• H20

• Co2

• BCl3

The bond present in MgBr2 is ?

• Ionic

• Covalent

• Coordinate

• Metallic

Tags

NGSS.HS-PS1-3

What kind of covalent bond exist in Ammonia molecule?

• One double and two single covalent bonds

• One triple and two single covalent bonds

• One triple , one double and one single bond

• All single covalent bonds

Which of the following element neither looses nor gains electrons?

• Sodium

• Chlorine

• Carbon

• Nitrogen

The bond formed in a crystal by anion and cation?

• Ionic

• Metallic

• Covalent

• Dipole

Tags

NGSS.HS-PS1-3

From the following four options, the compound containing ionic bond is?

• H2O

• HCl

• CaS

• NH3

Tags

NGSS.HS-PS1-3

From the following four statements regarding ionic solids, the one incorrect statement is

• They consist of ions

• They are generally soluble in water

• They have high melting and boiling point

• They conduct electricity in solid state

Tags

NGSS.HS-PS1-3

The valency of an atom of metal can be obtained from Lewis Structures by?

• multiplying number of electron dots to 8

• adding number of electron dots to 8

• Subtracting number of electron dots from 8

• Summation of the number of electron dots

The electronic dot structure were first introduced by

• Kekule

• Oppenheimer

• Lewis

• Bohr

Formation of chemical bond involves

• Increase in Kinetic energy

• Decrease in potential energy

• Decrease in Kinetic energy

• Increase in potential energy

Tags

NGSS.HS-PS1-4