Long Answer TypeGive reasons for the following:
(i) Density of water is maximum at 277K (4°C).
(ii) Why glycerol (glycerine) is more viscous than ethyl alcohol?
Short Answer TypeLong Answer TypeWrite Lewis symbols for the following atoms and ions:
S and S2–; Al and Al3+; H and H–.
Short Answer TypeWrite three favourable factors for formation of ionic bond.
An Ionic bond is a type of chemical bond which involves the transfer of one or more electrons from one ion to another ion of opposite charges.
Three favourable factors for the formation of ionic bond are:
(i) Low ionisation enthalpy of the metal atom.
(ii) High electron gain enthalpy of the non- metal atom.
(iii) High lattice enthalpy of the compound formed.
Long Answer Type
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