The bonds in crystalline ammonium chloride are
covalent and dative
ionic and covalent
ionic, covalent and dative
ionic, covalent and hydrogen bond
Correct answer is C
N makes three covalent bonds with three Hydrogen and a coordinate (dative covalent) bond with with hydrogen ion, forming ammonium ion (NH\(_4 ^+\). The ammonium ion forms an ionic bond with chloride ion to form NH\(_4\)Cl.
In metallic solid, the forces of attraction is between the mobile valence electrons and the
atoms
neutrons
negative ions
positively charged nuclei
Correct answer is D
No explanation has been provided for this answer.
Which of the following bond types is responsible for the high boiling point of water?
Metallic bond
Covalent bond
lonic bond
Hydrogen bond
Correct answer is D
The high boiling point is due to the breaking of the intermolecular force called Hydrogen bond.
In which of the following series are the atoms arranged in order of increasing ionization energy?
Li, Na K
B, Be, Li
O, F, Ne
Be, mG, Ca
Correct answer is C
The ionization energy increases across the period. It increases up the group.
In the periodic table, alkaline earth metals can be found in group
l
ll
VI
VII
Correct answer is B
No explanation has been provided for this answer.