ACIDS BASES AND SALTS- GRADE 7

which of the following set of substances contains acids?

• orange, vinegar, water

• lemon, orange, curd

• soap, toothpaste, washing soda

• antacid, lime water, chewing gum

which of the following is a base?

• apple juice

• baking soda

• vinegar

• water

Pure water has a pH of 7. Pure water is..

• slightly basic

• slightly acidic

• neutral

• none

Which of the following is an acid-base indicator?

• vinegar

• litmus paper

• HCl

• bleach

Products of a neutralization reaction are always:

• acid + base

• salt + base

• water + acid

• salt + water

Name the acid present in sting of an ant.

• formic acid

• HCl

• lactic acid

• vinegar

lemon drop turns

• red litmus blue

• blue litmus red

Name the acid present in our stomach.

• sulphuric acid- H2SO4

• hydrochloric acid- HCl

• nitric acid- HNO3

• citric acid

taste of an acid is..

• sour

• spicy

• bitter

• sweet

taste of base is..

• sour

• spicy

• bitter

• sweet