Damini Dewan

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Damini Dewan

Asked: 2 years agoIn: Class 11

1.gopinath Started business with cash 250002.

Damini Dewan

Asked: 2 years agoIn: General Awareness

Three different solution of oxidising agents. `K_(2)Cr_(2)O_(7),I_(2), and KMnO_(4)` is titrated separately with `0.19g of K_(2)S_(2)O_(3)`. The molarity of each oxidising agent is 0.1 M and the reaction are:
(i). `Cr_(2)O_(7)^(2-)+S_(2)O_(3)^(2-)toCr^(3+)+SO_(4)^(2-)`
(ii). `I_(2)+S_(2)O_(3)^(2-)toI^(ɵ)+S_(4)O_(6)^(2-)`
(iii). `MnO_(4)^(ɵ)+S_(2)O_(3)^(2-)toMnO_(2)+SO_(4)^(2-)`
(Molecular weight of `K_(2)S_(2)O_(3)=190,K_(2)Cr_(2)O_(7)=294,KMnO_(4)=158, and I_(2)=254 mol^(-1))` Which of the following statements is/are correct?
A. All three oxidants can act as self-indicators
B. Volume of `I_(2)` used is minium
C. Volume of `K_(2)Cr_(2)O_(7)` used is maximum
D. Wt. of `KMnO_(4)` used in the titration is max

Damini Dewan

Asked: 2 years agoIn: Protists

Do protozoans have a cellular nucleus?

Damini Dewan

Asked: 2 years agoIn: Class 09

What is comuning

Damini Dewan

Asked: 2 years agoIn: General Awareness

For the reaction
`H_(2)(g)+(1)/(2)O_(2)(g)rarrH_(2)O(l),DeltaH=-285.8 kJ mol^(-1)`
`DeltaS=-0.163 kJ mol^(-1) K^(-1)`. What is the value of free energy change at `27^(@)C` for the reaction
A. `-236.9 kJ mol^(-1)`
B. `-281.4 kJ mol^(-1)`
C. `-334.7 kJ mol^(-1)`
D. `+334.7 kJ mol^(-1)`

Damini Dewan

Asked: 2 years agoIn: Class 10

Kiska kiska 23 tarik ko English ka exam hai

Damini Dewan

Asked: 2 years agoIn: Class 10

What is the value of a in statistics

Damini Dewan

Asked: 2 years agoIn: Class 10

What is the colour of universal indicator paper when deep into wet soap?

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Damini Dewan

1.gopinath Started business with cash 250002.

Do protozoans have a cellular nucleus?

What is comuning

For the reaction
`H_(2)(g)+(1)/(2)O_(2)(g)rarrH_(2)O(l),DeltaH=-285.8 kJ mol^(-1)`
`DeltaS=-0.163 kJ mol^(-1) K^(-1)`. What is the value of free energy change at `27^(@)C` for the reaction
A. `-236.9 kJ mol^(-1)`
B. `-281.4 kJ mol^(-1)`
C. `-334.7 kJ mol^(-1)`
D. `+334.7 kJ mol^(-1)`

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