Dr. J M D'Souza and Dr. Kirti J D'Souza Solutions for Exercise 2: EXERCISES

Author:Dr. J M D'Souza & Dr. Kirti J D'Souza

Dr. J M D'Souza Science Solutions for Exercise - Dr. J M D'Souza and Dr. Kirti J D'Souza Solutions for Exercise 2: EXERCISES

Attempt the free practice questions from Exercise 2: EXERCISES with hints and solutions to strengthen your understanding. EUREKA PLUS Revised Bringing Science to Life solutions are prepared by Experienced Embibe Experts.

Questions from Dr. J M D'Souza and Dr. Kirti J D'Souza Solutions for Exercise 2: EXERCISES with Hints & Solutions

EASY
7th CBSE
IMPORTANT
EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 1

An example of a physical change is

EASY
7th CBSE
IMPORTANT
EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 2

When lemon juice is added to baking powder 

EASY
7th CBSE
IMPORTANT
EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 4

Two hydrogen atoms linked to one oxygen atom in a definite manner form

EASY
7th CBSE
IMPORTANT
EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 5

The chemical formula of table salt is 

EASY
7th CBSE
IMPORTANT
EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 2

A chemical reaction always involves formation of one or more substances.

EASY
7th CBSE
IMPORTANT
EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 4

A chemical equation describes a chemical reaction.

EASY
7th CBSE
IMPORTANT
EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 5

An element is made up of two or more kinds of atoms.

HARD
7th CBSE
IMPORTANT
EUREKA PLUS Revised Bringing Science to Life>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q 4

Explain crystallisation.