22 23 24 A 24 B 24 C 25 A 25 B 25 C 26 A 26 B 26 C 27 28 29 A 29 B 30 31 A 31 B 31 C 32 A 32 B 32 C 32 D 33 A 33 B 34 A 34 B 35 A 35 B 35 C 36 A 36 B 36 C 37 A 37 B 37 C 38 A 38 B 38 C 39 A 39 B 39 C 40 A 40 B 41 A 41 B 41 C 42 A 42 B 42 C 43 A 43 B 43 C 44 A 44 B 44 C 45 A 45 B 45 C

Lakhmir Singh & Manjit Kaur - Chemistry

Very Short Answer Type Questions-Pg-220

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Short Answer Type Questions-Pg-221

22 A 22 B 22 C 23 A 23 B 24 A 24 B 25 A 25 B 25 C 26 A 26 B 27 A 27 B 28 A 28 B 28 C 29 30 A 30 B 31 A 31 B 32 A 32 B 32 C 33 A 33 B 34 A 34 B 35 A 35 B 35 C 35 D

Long Answer Type Questions-Pg-222

36 A 36 B 36 C 36 D 37 A 37 B 37 C 37 D 38 A 38 B 38 C 38 D 39 A 39 B 39 C 39 D 39 E

Multiple Choice Questions (MCQs)-Pg-223

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Very Short Answer Type Questions-Pg-239

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26 26 26 C 27 28 A 28 B 28 C 29 A 29 B 29 C 30 A 30 B 30 C 31 A 31 B 31 C 32 A 32 B 32 C 33 A 33 B 33 C 34 A 34 B 34 C 35 A 35 B 35 C 36 A 36 B 36 C 37 A 37 B 37 C

Long Answer Type Questions-Pg-241

38 A 38 B 38 C 38 D 38 E 39 A 39 B 39 C 39 D 39 E 40 A 40 B 40 C 40 D 40 E

Multiple Choice Questions (MCQs)-Pg-242

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Questions Based on High Order Thinking Skills (HOTS)-Pg-243

Very Short Answer Type Questions-Pg-262

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Short Answer Type Questions-Pg-263

22 23 24 A 24 B 24 C 25 A 25 B 25 C 26 A 26 B 26 C 27 28 29 A 29 B 30 31 A 31 B 31 C 32 A 32 B 32 C 32 D 33 A 33 B 34 A 34 B 35 A 35 B 35 C 36 A 36 B 36 C 37 A 37 B 37 C 38 A 38 B 38 C 39 A 39 B 39 C 40 A 40 B 41 A 41 B 41 C 42 A 42 B 42 C 43 A 43 B 43 C 44 A 44 B 44 C 45 A 45 B 45 C

Long Answer Type Questions-Pg-265

46 A 46 B 47 A 47 B 48 A 48 B 48 C 49 A 49 B 49 C

Multiple Choice Questions (MCQs)-Pg-265

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Questions Based on High Order Thinking Skills (HOTS)-Pg-266

66 67 68 69 70 71 72 73 74 75

Q. 285.0( 3 Votes )

Give reasons for the

Class 10th Lakhmir Singh & Manjit Kaur - Chemistry 4. Carbon and Its Compounds

Answer :

(a) When the bottoms of cooking vessels getting blackened by the flame, it means that the air holes of a gas burner are blocked and fuel is getting wasted. So, the air holes of the gas burner should be adjusted.

(b) Some synthetic detergents cannot be decomposed by micro-organisms as they are non-biodegradable. Hence, they cause water pollution.

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