1.

Fill in the blanks in the following sentences: (a). Acids have a ______taste and they turn_____litmus to _____ (b). Substnaces do not show their acidic properties without_____ (c). Acids produce______ions on dissolving in water. (d). Those substnaces whose smell (or odour) changes in acidic or basic solution are called _______indicators. (e). Onion and vanilla extract are_____Indicators.

Answer» (a). Sour, blue, red
(b) water
(c) hydrogen
9d) olfactor
(e) olfactory


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