Classify the substances in the following table: Substances Colour of red litmus Colour of blue litmus A Blue Blue B Red Red C Red Red D Red Blue E Blue Blue F Red Blue

Acids turn blue litmus red but doesn't show colour change in red litmus, bases turn red litmus blue but doesn't show colour change in blue litmus and neutral substances don't show colour change in any of the indicator. Substance A and E turns red litmus blue but doesn't change the colour of blue litmus, hence these are bases. Substance B and C turns blue litmus red but doesn't change the colour of red litmus, hence these are acids. Substance D and F don't change the colour of either of the litmus papers hence, these are salts. Substances Colour of red litmus Colour of blue litmus Type of substance A Blue Blue Base B Red Red Acid C Red Red Acid D Red Blue Salt E Blue Blue Base F Red Blue Salt

E M B I B E

Science for Class 7 - Part 1>Chapter 3 - Acids and Alkalis>Let us assess

Kerala Board Solutions for Chapter: Acids and Alkalis, Exercise 9: Let us assess

Author:Kerala Board

Kerala Board Science Solutions for Exercise - Kerala Board Solutions for Chapter: Acids and Alkalis, Exercise 9: Let us assess

Attempt the free practice questions on Chapter 3: Acids and Alkalis, Exercise 9: Let us assess with hints and solutions to strengthen your understanding. Science for Class 7 - Part 1 solutions are prepared by Experienced Embibe Experts.

Questions from Kerala Board Solutions for Chapter: Acids and Alkalis, Exercise 9: Let us assess with Hints & Solutions

MEDIUM

7th Kerala Board

IMPORTANT

Science for Class 7 - Part 1>Chapter 3 - Acids and Alkalis>Let us assess>Q 1

The $pH$ values of different soil samples are given in the option. Which of the soils should be treated with lime?

HARD

7th Kerala Board

IMPORTANT

Science for Class 7 - Part 1>Chapter 3 - Acids and Alkalis>Let us assess>Q 2

When a magician rubbed white paper with a handkerchief, red letters appeared on the paper. Which of the following materials might have been used by him?

MEDIUM

7th Kerala Board

IMPORTANT

Science for Class 7 - Part 1>Chapter 3 - Acids and Alkalis>Let us assess>Q 3

Classify the substances in the following table: