Consider the following statements regarding bases and alkalis: 1. All bases dissolve in water. 2. Bases which are soluble in water are called alkalis. 3. An alkali is soapy to touch, bitter and corrosive. 4. Addition of water to an alkali generates heat. Which of the statements given above are correct?

With reference to 'acid and bases', which of the following statements is/are correct? 1. Acidic solutions have pH more than 7. 2. Basic solutions have pH less than 7.

Which of the following pairs is/are NOT correctly matched? (Acid) - (Acid found in): 1. Lactic acid - Curd, 2. Tartaric acid - Grapes, 3. Acetic acid - Potato

A solution with a pH value less than 7 is a/an:

pH value of 0.1NHCl solution is approximately:

Sour taste of vinegar is due to