NCERT Solutions for Chapter 6 Physical and Chemical Changes Class 7 Question 1. Classify the changes involved in the following processes as physical or chemical changes: (a) Photosynthesis (b) Dissolving sugar in water (c) Burning of coal (d) Melting of wax (e) Beating aluminium to make aluminium foil (f ) Digestion of food Answer 1 (a) Photosynthesis → Chemical … [Read more...] about Chapter 6 Physical and Chemical Changes
Class 7
Chapter 5 Acids, Bases and Salts
NCERT Solutions for Chapter 5 Acids, Bases and Salts for Class 7 Question 1. State differences between acids and bases. Answer 1 Acids Bases They are sour in taste They are bitter in taste. They turn blue litmus red. They turn red litmus blue. They contain hydrogen ions. They contain hydroxyl ions. They are not soapy to touch. They are soapy … [Read more...] about Chapter 5 Acids, Bases and Salts
Chapter 3 Fibre to Fabric
NCERT Solutions for Chapter 3 Fibre to Fabric for Class 7 Question 1. You must be familiar with the following nursery rhymes: (i) ‘Baa baa black sheep, have you any wool.’ (ii) ‘Mary had a little lamb, whose fleece was white as snow.’ Answer the following: (a) Which parts of the black sheep have wool? (b) What is meant by the white fleece of the … [Read more...] about Chapter 3 Fibre to Fabric
Chapter 4 Heat
NCERT Solutions for Chapter 4 Heat for Class 7 Question 1. State similarities and differences between the laboratory thermometer and the clinical thermometer. Answer 1 Similarities 1) Both are made of long, narrow uniform glass tubes. 2) Bulbs of both the thermometers contain mercury. 3) Both have Celsius and Fahrenheit scale. 4) Both are used to measure … [Read more...] about Chapter 4 Heat
Chapter 2 Nutrition In Animals
NCERT Solutions for Chapter 2 Nutrition In Animals for Class 7 Question 1. Fill in the blanks: (a) The main steps of nutrition in humans are __________, __________, __________, _________ and __________. (b) The largest gland in the human body is __________. (c) The stomach releases hydrochloric acid and ___________ juices which act on food. (d) The inner wall of … [Read more...] about Chapter 2 Nutrition In Animals