gehong day

. Fill in the blanks with the correct word(s) ,terms. (7 marks)
(a) Sodium hydroxide is commercially produced from saturated solution of ………. by using electrolysis.
(b) The properties of steel depend upon the ……….. .
(c) Ammonia gas has a characteristic ………. smell.
(d) Hydrogen sulphide has weak ………. properties.
(e) Halogens have essential electronic structure of ………. .
(f) In the reaction with ammonia, boron trifluoride behave as an ……….