The reaction, 2Zn + O2→2ZnO is which type of reaction.
A. Oxidation
B. Displacement
C. Neutralisation
D. Decomposition
1 Answers
The reaction `Aoverset(k)rarr` Product, is zero order while the reaction `Boverset(k)rarr` Product, is first order reaction. For what intial concentra
Correct Answer - A For zero order reaction, x=kt `:. (a)/(2)=kxxt_(1//2),i.e.,t_(1//2)=(a)/(2k)" ".....(i)` For frist order reaction, `t_(1//2)=(log_(e)2)/(k)" ".....(ii)` From eqs. (i) and (ii), `(a)/(2k)=(log_(e)2)/(k)` `a=log_(e)4M`
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`2Zn+O_(2)to2ZnO," "DeltaG^(@)=-606J` . . . (i) `2Zn+2Sto2ZnS," "DeltaG^(@)=-293J` . . .(ii) `2S+2O_(2)to2SO_(2)(g)," "DeltaG^(@)=-408J` . . . (iii) `
Correct Answer - A `DeltaG^(@)=2DeltaG_(ZnO)^(@)+2DeltaG_(SO_(2))^(@)-2DeltaG_(ZnS)^(@)` `=[-616-408]-[-293]` `=-1024+293` `=-731J`
2 Answers 1 views
In a test cross involving `F_(1)` dihybrid flies, more parental-type offspring were produced than the recombinant type offspring. This indicates
Correct Answer - B When two genes in a dihybrid cross situated on the same chromosome, the proportion of parental gene combinations are much higher than the non-parental or recombinant type...
2 Answers 1 views
Name these type of retail trade? , Which type of retailer are they?
1. Speciality shops 2. Small Scale Fixed retailer.
2 Answers 1 views
Domain type is a/an …………… A. Data type B. Column Name C. Attribute Name D. Entity Name
Correct option is: D. Entity Name
2 Answers 1 views
(a) For a reaction `ABrarrP` , the rate law is given by, `r=k[A]^(1//2)[B]^(2).` What is the order of this reaction? (b) A first order reaction is fou
(a) `0.5+2=2.5` (b) For the first order reaction, `t_(1//2)=(0.693)/(K)=(0.693)/(5.5xx10^(-14)S^(-1))=1.26xx10^(13)S.`
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A doped semiconductor has impurity levels `30meV` below the conduction band. Is the material `n`-type or `p`- type? Find the maximum wavelength of igh
Correct Answer - `4.125xx10^(-5)m`
2 Answers 4 views
Pardhiv bought two types of shares A and B worth Rs.5000 each. If he bought 25 type A shares and 20 type B shares, then the difference between their f
Correct Answer - Rs.50
2 Answers 1 views
Shiva can type `x` words per hour while Sreevias can type `y` words per hour. Shiva works for 5 hours per day and Sreenvias works for 7 hours per day.
Correct Answer - `5x + 7y ge 700`
2 Answers 1 views
A company manufactures two type of novelty souvenirs made of plywood, Souvenirs of type A recquire 8 minutes each for cutting and 10 minutes each for
Correct Answer - `8x+10y le240` `10x+15y le 300` ` x ge 0, y ge 0`
2 Answers 1 views