27 A 27 B 27 C 27 D 27 E 28 A 28 B 28 C 28 D 28 E 29 A 29 B 29 C 29 D

Lakhmir Singh & Manjit Kaur - Chemistry

Very Short Answer Type Questions-Pg-281

1 A 1 B 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Short Answer Type Questions-Pg-282

16 A 16 B 16 C 17 A 17 B 18 A 18 B 18 C 19 A 19 B 19 C 20 A 20 B 20 C 21 22 23 A 23 B 23 C 24 A 24 B 25 A 25 B 26 A 26 B

Long Answer Type Questions-Pg-283

27 A 27 B 27 C 27 D 27 E 28 A 28 B 28 C 28 D 28 E 29 A 29 B 29 C 29 D

Multiple Choice Questions (MCQs)-Pg-283

30 31 32 33 34 35 36 37 38 39 40 41

Questions Based on High Order Thinking Skills (HOTS)-Pg-284

42 43 44 45 46 47 48 49

Very Short Answer Type Questions-Pg-302

1 2 3 4 A 4 B 5 6 7 A 7 B 8 9 10 11 12 13 14 15 16 17 18 19 20

Short Answer Type Questions-Pg-303

21 22 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 A 29 B 30 A 30 B 31 A 31 B 32 A 32 B 33 A 33 B

Long Answer Type Questions-Pg-304

34 A 34 B 34 C 34 D 34 E 35 A 35 B 35 C 35 D 35 E 36 A 36 B 36 C 36 D 36 E

Multiple Choice Questions (MCQs)-Pg-305

37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

Questions Based on High Order Thinking Skills (HOTS)-Pg-306

57 58 59 60 61 62 63 64 65 66 A 66 B 67 68 69 70 71 72 73 74 75 76 77 78 79 80

Q. 27 D4.2( 10 Votes )

In Mendeleev

Class 10th Lakhmir Singh & Manjit Kaur - Chemistry 5. Periodic Classification of Elements

Answer :

Mendeleev did not mention noble gases in his periodic table because at that time noble gases were not invented, so there was no group of noble gases in Mendeleevs’s Periodic table.

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