NCERT Solutions for Chapter: Acids, Bases and Salts, Exercise 3: SHORT ANSWER QUESTIONS
NCERT Science Solutions for Exercise - NCERT Solutions for Chapter: Acids, Bases and Salts, Exercise 3: SHORT ANSWER QUESTIONS
Attempt the practice questions on Chapter 5: Acids, Bases and Salts, Exercise 3: SHORT ANSWER QUESTIONS with hints and solutions to strengthen your understanding. NCERT Exemplar Science - Class 7 solutions are prepared by Experienced Embibe Experts.
Questions from NCERT Solutions for Chapter: Acids, Bases and Salts, Exercise 3: SHORT ANSWER QUESTIONS with Hints & Solutions
Look at figure which shows solutions taken in test tubes A,B,C and D. What colour is expected when a piece of red litmus paper is dropped in each test tube? Nature of the solutions is given in the table for your help.
| Test Tube | Nature of solution | Change in colour of red litmus |
| A | Neutral | |
| B | Basic | |
| C | Acidic | |
| D | Neutral |
While playing in a park, a child was stung by a wasp. Some elders suggested applying a paste of baking soda and others lemon juice as a remedy. Which remedy do you think is appropriate and why?
Form a sentence using the following words - baking soda, ant bite, moist, effect, neutralised, rubbing.
Match the substances in column I with those in column II.
| Column I | Column II | ||
| (a) | Tartaric acid | (i) | soap |
| (b) | Calcium hydroxide | (ii) | curd |
| (c) | Formic acid | (iii) | unripe mangoes |
| (d) | Sodium hydroxide | (iv) | ant's sting |
| (e) | Lactic acid | (v) | lime water |
Turmeric and litmus are _____ acid-base indicators.
Phenolphthalein gives _____ colour with lime water.
