Ela Chowdary Solutions for Chapter: Language of Chemistry, Exercise 3: EVALUATION

Author:Ela Chowdary

Ela Chowdary Chemistry Solutions for Exercise - Ela Chowdary Solutions for Chapter: Language of Chemistry, Exercise 3: EVALUATION

Attempt the practice questions on Chapter 6: Language of Chemistry, Exercise 3: EVALUATION with hints and solutions to strengthen your understanding. FRANK NEW CERTIFICATE - Chemistry solutions are prepared by Experienced Embibe Experts.

Questions from Ela Chowdary Solutions for Chapter: Language of Chemistry, Exercise 3: EVALUATION with Hints & Solutions

EASY
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 6 - Language of Chemistry>EVALUATION>Q 4

In an exothermic reaction, the heat energy is _____. (absorbed/evolved)

EASY
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 6 - Language of Chemistry>EVALUATION>Q 3

What do you mean by the term effervescence?

MEDIUM
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 6 - Language of Chemistry>EVALUATION>Q 5

What is a precipitate? Write a chemical reaction in which a white-coloured precipitate is formed.

EASY
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 6 - Language of Chemistry>EVALUATION>Q 6

What information does a chemical equation provide?

EASY
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 6 - Language of Chemistry>EVALUATION>Q 2

Give one example to illustrate the following characteristic of a chemical reaction.

Change of state

EASY
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 6 - Language of Chemistry>EVALUATION>Q 2

Give one example to illustrate the following characteristic of a chemical reaction.

Change of colour

EASY
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 6 - Language of Chemistry>EVALUATION>Q 2

Give one example to illustrates the following characteristic of a chemical reaction.

Evolution of heat

MEDIUM
7th ICSE
IMPORTANT
FRANK NEW CERTIFICATE - Chemistry>Chapter 6 - Language of Chemistry>EVALUATION>CHALLENGE QUESTION

Substance A decomposes faster on heating in the presence of substance B, whereas substance B does not undergo any chemical change. What do we call substance B here? What is the role of these types of substances in chemical reactions?