Eduwiser's CBSE Chemistry For Class X>Chapter 1 - Chemical Reactions and Equations>Exercise 9>Q 14

EASY

10th CBSE

IMPORTANT

Earn 100

Burning of petrol is a . (physical change/ chemical change)

75.47% studentsanswered this correctly

Important Questions on Chemical Reactions and Equations

EASY

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 1 - Chemical Reactions and Equations>Exercise 9>Q 15

The reactant molecules come _____ to bring in the chemical reaction. (farther/closer)

EASY

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 1 - Chemical Reactions and Equations>Exercise 9>Q 16

The colour of Anhydrous copper sulphate is _____.

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IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 1 - Chemical Reactions and Equations>Exercise 9>Q 17

The reaction

Zn + {Cu}^{2 +} \to {Zn}^{2 +} + Cu

gives _____ energy.

HARD

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 1 - Chemical Reactions and Equations>Exercise 9>Q 18

Fireflies glow in dark due to _____.

EASY

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 1 - Chemical Reactions and Equations>Exercise 9>Q 19

Decomposition of

AgBr

takes place in presence of _____. (sunlight/ electricity)

MEDIUM

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 1 - Chemical Reactions and Equations>Exercise 9>Q 20

Rust is chemically _____.

(A) ${Fe}_{2} O_{3}$ (B) $FeO$ (C) ${Fe}_{2} O_{3} . {xH}_{2} O$

Enter your correct answer as A, B or C.

MEDIUM

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 1 - Chemical Reactions and Equations>Exercise 9>Q 21

Green vitriol is chemically _____.

(A) ${CuSO}_{4} . 5 H_{2} O$ (B) ${FeSO}_{4} . 7 H_{2} O$ (C) $H_{2} {SO}_{4}$

Enter your correct answer as A, B or C.

MEDIUM

10th CBSE

IMPORTANT

Eduwiser's CBSE Chemistry For Class X>Chapter 1 - Chemical Reactions and Equations>Exercise 9>Q 22

Blue vitriol is chemically _____.

(A) ${CuSO}_{4} . 5 H_{2} O$ (B) ${FeSO}_{4} . 7 H_{2} O$ (C) $H_{2} {SO}_{4}$

Enter your correct answer as A, B or C.