Answers

2014-08-25T19:36:20+05:30
Acids have sour taste 
acids are corrosives 
acids change the color of certain vegetables dyes,such as litmus ,from blue to red
 
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2014-08-25T19:37:10+05:30
Acids:
⇒ they are chemical substances which are characterized by sour taste and they has the ability to turn blue litmus paper red and they reacts with bases and certain metals to form salts
bases:
⇒they are chemical substances that are slippery to touch,bitter to taste,turns red litmus paper blue and their react with acids to form salts

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please don't mistake me i am not having the patience to give three defenitions