Question

Please solve these questions I will mark the answer as brainlist please

Answer 1

Answer:

18) Answers:-

• No of valence electrons = 7
• -1 valency
• Non metallic
• 2,8,7

b

i) $4NH_3 (g) + 5O_2 (g)$ ➡ $4NO(g) + 6H_2O(l)$

ii) Platinum Temperature on heating during reaction = 800 Degree C

(6 answers for 6 points)

Answer 2

Answer:

18. (a) (i)7 electrons.

(ii) Since the outermost shell has 7 electrons in its outermost shell means that it requires one more electron to acquire noble gas configuration. So, the valency of X is 1.

(iii) Non metal as it will gain an electron to full fill it's eight electrons.

(iv) Since element X' belongs to 3rd period, it means that the element X has three shells. Also, it belongs to group 17 which means that it has 7 valence electrons as valence electrons =17−10=7. So, the electronic configuration of the element X is 2, 8, 7.

(b) (i)See the attachment

(ii) 800C

(c) Iron - Steel making

Zinc - galvanizing

Aluminium - aeroplane wings

19. (i) Allotropy is the existence of a chemical element in two or more forms.

(ii) Elements exhibiting allotropy include tin, carbon, sulfur, phosphorus, and oxygen.

20. Question is not complete....

Hope it helps!

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