Ag + CuSO4→ Cu + AgSO4. Is this reaction possible? Explain.

Important Questions on Language of Chemistry and Transformation of Substances

EASY

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 3 - Language of Chemistry and Transformation of Substances>PRACTICE QUESTIONS (CLASSROOM WING)>Q 25

Why do chemical reactions involve loss or gain of energy?

MEDIUM

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 3 - Language of Chemistry and Transformation of Substances>PRACTICE QUESTIONS (CLASSROOM WING)>Q 26

Differentiate between oxidation and reduction.

EASY

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 3 - Language of Chemistry and Transformation of Substances>PRACTICE QUESTIONS (CLASSROOM WING)>Q 27

What is a displacement reaction?

EASY

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 3 - Language of Chemistry and Transformation of Substances>PRACTICE QUESTIONS (CLASSROOM WING)>Q 28

What is decomposition reaction?

EASY

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 3 - Language of Chemistry and Transformation of Substances>PRACTICE QUESTIONS (CLASSROOM WING)>Q 29

What are types of catalytic reactions?

EASY

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 3 - Language of Chemistry and Transformation of Substances>PRACTICE QUESTIONS (CLASSROOM WING)>Q 30

Define an endothermic reaction.

EASY

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 3 - Language of Chemistry and Transformation of Substances>PRACTICE QUESTIONS (CLASSROOM WING)>Q 31

Sugar, on being treated with ${\mathrm{H}}_2{\mathrm{SO}}_4$, forms a black residue. If we observe the weights of sugar and the residue, we find a difference in weights. Why?

HARD

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 3 - Language of Chemistry and Transformation of Substances>PRACTICE QUESTIONS (CLASSROOM WING)>Q 32

Burning of candle is both a physical as well as a chemical change. How?