21 A 21 B 22 A 21 B 22 C 23 A 23 B 24 A 24 B 25 A 25 B 26 A 26 B 27 A 27 B 28 A 28 B 29 30 31 A 31 B 32 33 34 35 36 37 38 39 40 41

Lakhmir Singh & Manjit Kaur - Chemistry

Very Short Answer Type Questions-Pg-131

1 2 3 A 3 B 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 A 18 B 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

Short Answer Type Questions-Pg-133

36 A 36 B 36 C 36 D 37 38 A 38 B 39 A 39 B 39 C 40 A 40 B 41 A 41 B 42 A 42 B 43 A 43 B 44 A 44 B 45 A 45 B 46 47 48 49 A 49 B 50 A 50 B 50 C 51 A 51 B 51 C 52 A 52 B 52 C 53 A 53 B 54 55 56 A 56 B 56 C 57 A 57 B 58 59 60 A 60 B 61

Long Answer Type Questions-Pg-134

62 A 62 B 62 C 62 D 62 E 63 A 63 B 63 C 63 D 63 E 64 A 64 B 64 C 64 D 64 E 65 A 65 D 65 E

Multiple Choice Questions (MCQs)-Pg-135

66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88

Questions Based on High Order Thinking Skills (HOTS)-Pg-136

89 90 91 92 93 A 93 B 93 C 94 95 96 97 98 99 A 99 B 100

Very Short Answer Type Questions-Pg-167

1 2 3 4 5 A 5 B 5 C 6 A 6 B 7 8 B 8 B 9 10 11 12 13 14 15 17 18 19 20

Short Answer Type Questions-Pg-168

21 A 21 B 22 A 21 B 22 C 23 A 23 B 24 A 24 B 25 A 25 B 26 A 26 B 27 A 27 B 28 A 28 B 29 30 31 A 31 B 32 33 34 35 36 37 38 39 40 41

Long Answer Type Questions-Pg-169

42 A 42 B 42 C 42 D 42 E 43 A 43 B 43 C 43 D 43 E 44 A 44 B 44 C 44 D 44 E 45 A 45 B 45 C 45 D 45 E

Multiple Choice Questions (MCQs)-Pg-169

46 47 48 49 50 51 52 53 54 55 56 57 58 58 60 61 62 63 64 65 66

Questions Based on High Order Thinking Skills (HOTS)-Pg-171

67 A 67 B 67 C 67 D 68 69 70 71 73 74 75 76 77 78 79 80 81

Very Short Answer Type Questions-Pg-191

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Short Answer Type Questions-Pg-192

31 32 33 34 A 34 B 35 A 35 B 36 A 36 B 37 A 37 B 37 C 38 A 38 B 38 C 39 40 41 42 43 44 A 44 B 44 C 45 46 A 46 B 46 C 46 D 47 48 A 48 B 48 C 49 A 49 B 49 C 50 A 50 B 51 A 51 B 51 C 52 53 A 53 B 54 55 A 55 B 55 C 55 D 56 A 56 B 56 C

Long Answer Type Questions-Pg-193

57 A 57 B 57 C 57 D 57 E 58 A 58 B 58 C 58 D 58 E 59 E 59 B 59 C 59 D 59 E 60 A 60 B 60 C 60 D 60 E 61 A 61 B 61 C 61 D 61 E

Multiple Choice Questions (MCQs)-Pg-194

62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91

Questions Based on High Order Thinking Skills (HOTS)-Pg-195

92 93 94 95 96 97 98 99 100

Q. 294.1( 10 Votes )

Explain why, a solution of cane sugar does not conduct electricity but a solution of common salt is a good conductor of electricity.

Class 10th Lakhmir Singh & Manjit Kaur - Chemistry 3. Metal and Non-Metal

Answer :

A solution of cane sugar does not conduct electricity but a solution of common salt is a good conductor of electricity. Because common salt is an ionic compound containing ionic bonds whose ions are responsible for the conduction of electricity through the solution whereas cane sugar is covalent compound which do not conduct electricity.

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During the reaction of some metals with dilute hydrochloric acid, following observations were made.

i. The temperature of the reaction mixture rises when aluminium (Al) is added.

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iii. Some bubbles of a gas are seen when lead (Pb) is reacted with the acid.

Explain these observations giving suitable reasons.

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State which of the following chemical reaction will take place, giving a suitable reason for each.

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i. Crystals of copper sulphate are heated in a test for some time.

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Science - Board Papers

An element X reacts with hydrogen, when heated, to form a covalent hydride H₂X. If H₂X has a smell of rotten eggs, the element X is likely to be:Lakhmir Singh & Manjit Kaur - Chemistry

Out of aluminium, copper, calcium and tin, the most reactive metal is:Lakhmir Singh & Manjit Kaur - Chemistry

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An element X forms two oxides XO and XO₂. The oxide XO is neutral but XO₂ is acidic in nature. The element X is most likely to be :Lakhmir Singh & Manjit Kaur - Chemistry

The metals which can produce amphoteric oxides are:Lakhmir Singh & Manjit Kaur - Chemistry

Out of the following oxides, the amphoteric oxide is:Lakhmir Singh & Manjit Kaur - Chemistry