Kerala Board Solutions for Chapter: Chemical Changes, Exercise 3: Exercise 3
Kerala Board Science Solutions for Exercise - Kerala Board Solutions for Chapter: Chemical Changes, Exercise 3: Exercise 3
Attempt the free practice questions on Chapter 6: Chemical Changes, Exercise 3: Exercise 3 with hints and solutions to strengthen your understanding. Science for Class 8 - Part 1 solutions are prepared by Experienced Embibe Experts.
Questions from Kerala Board Solutions for Chapter: Chemical Changes, Exercise 3: Exercise 3 with Hints & Solutions
Add dilute hydrochloric acid to a piece of magnesium taken in a test tube.
Which is the gas liberated in this reaction?
Touch the bottom of the test tube. What do you feel?
Take a few crystals of potassium permanganate in a dry test tube. Heat the test tube. Bring a glowing incense stick to the mouth of the test tube. What do you observe?
Take a few crystals of potassium permanganate in a dry test tube. Heat the test tube. Bring a glowing incense stick to the mouth of the test tube. The stick flares up. What could be the reason?
Take a few crystals of potassium permanganate in a dry test tube. Heat the test tube. Bring a glowing incense stick to the mouth of the test tube. The stick flares up. Does residue in the test tube have the colour of potassium permanganate?
Take a few crystals of potassium permanganate in a dry test tube. Heat the test tube. Bring a glowing incense stick to the mouth of the test tube. The stick flares up. Can this reaction take place without heating?
Add hydrochloric acid to a concentrated solution of sodium hydroxide taken in a test tube. As the reaction proceeds, does the test tube become hot or cold?
