Acids are the substances which turn blue litmus solution red and are sour in taste. … dangerous and should never be handled without…
(i) The acids which are obtained from plants and
animals are called organic acids. Citric acids obtained from lemon. Vinegar contains acetic acid.
(ii) Concentrated adds are very hot when they fall on any object (clothes or skin), they burn the object.
(iii) Cold drinks, chocolates and sweets are most harmful for health as well as tooth. They produce adds in mouth which are responsible for tooth decay. It has been noticed that tooth gets dissolved in the cold drinks if kept for longtime.