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.

If a:b=3:8 and b:c=4:5, then a:c=………….. A. 5:11 B. 3:8 C. 3:11 D. 3:10 E. 5:8 If a:b=3:5 and b:c=3:5, then a:b:c=……… A. 2:3:5 B.3:5:7 C.6:10:15 D. 9:15:25 E.9:20:27 If a:b = 5:3 , then 3a+ 4b: 4a+3b is