Acids are chemical substances which readily produce H⁺ ions when dissolved in aqueous solutions and are corrosive or sour when tasted and can neutralize alkalis and turns blue litmus to red colourFor Ex: The sour taste of lemon is due to the citric acid present in it.Fruits,curd are sour due to the presence of acids.
Which gives H+ ion in an aqueous solution called acid

Acid are those chemical substance which have sour in taste &change the colour of red litmus to blue .It pH value is 0-7.The pH value of the acid is inversely proportional to the value of pH scales.
Acids are those chemical substances which have a sour taste.
The solution which gives H+ ions in aqueous .medium
Acids are those chemical susbstances which have sour taste , changes blue litmus to red and on dissolving in water they will dissociate to give H+ ions