In d-block elements every element is not a transition elements, to become transition elements in d orbital we should have atlest one un filled orbital to perform d-d transition, next coming to zinc there is no incomplete d orbital so it is not a transition element
These are not competitive exam questions.last year I wrote nsejs and chemistry Olympiad I was able to even recognise only a few concepts let alone answer the questions
Remember, CaCO3 is the one compound which have wholly Solly 100g . So it is very easy to calculate individual % in it. Each Element will have the same percentage as its molecular mass in the compound CaCO3. Let, CaCO3=Ca(40)+C(12)+O3(3×16=48) Adding these; CaCO3=40+12+48=100g Therefore Ca=40%,C=12% and O3 mean oxygen=48%. Also you can find out percentage of element in compound by formula: % of element= Atomic mass of element×no.of elements in that compound×100/Atomic mass of whole compound So, % of Ca= Atomic mass of Ca×No.of Ca in Compound CaCO3 ×100/Compound whole molecular mass % of Ca=40×100/100=40% Ans. Remember me in your prayers ❤
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Nitrogen oxide
7
Oxygen
Condensation
Electron
Methane
Group 18
Carbon
Carbon dioxide
Vitamin C
Flourine
Carbon dioxide
Atom
Hydrogen
Uranium
Copper
Carbon
Hydrogen sulfide
4 th period
Calcium
Nitrogen
Silicon
Sn
Nitrogen
Condensation
Carbon dioxide
Butane
Silicon
Group 2
Iron
Lithium
Acetylene
I
Argon
0:2 nm
86
40 percent
Nickel cadmium
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in question 17 b is also correct because zinc and copper both are transition elements
In d-block elements every element is not a transition elements, to become transition elements in d orbital we should have atlest one un filled orbital to perform d-d transition, next coming to zinc there is no incomplete d orbital so it is not a transition element
Yah zn is not the transition element
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I am studying in 9 and I answer 34out of 40
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These are not competitive exam questions.last year I wrote nsejs and chemistry Olympiad I was able to even recognise only a few concepts let alone answer the questions
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Too simple and easy , will it be tha standard of a sate level chemistry Olympiad?
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Zn is also transition metal
Zn is not an transition element
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8 mistakes
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I answered 34 correct answers
Solution for 39th que sir
Remember, CaCO3 is the one compound which have wholly Solly 100g . So it is very easy to calculate individual % in it. Each Element will have the same percentage as its molecular mass in the compound CaCO3.
Let, CaCO3=Ca(40)+C(12)+O3(3×16=48)
Adding these; CaCO3=40+12+48=100g
Therefore Ca=40%,C=12% and O3 mean oxygen=48%.
Also you can find out percentage of element in compound by formula:
% of element= Atomic mass of element×no.of elements in that compound×100/Atomic mass of whole compound
So, % of Ca= Atomic mass of Ca×No.of Ca in Compound CaCO3 ×100/Compound whole molecular mass
% of Ca=40×100/100=40% Ans.
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Question no ; 4 option B is correct answer
Ni it's A
by product of photosynthesis is oxygen is correct