Chemistry: Post your doubts here!

[Abhi Mevawala]

Hi guys need help here?
Ans is c.Thank u.

hey see BF3 is trigonal planer so option B and D are eliminated
aftr the reaction Boron has a hybridisaton of sp3 tht is tetrahydral lyk CH4 so it have shape lyk it
thrfor the ans is C

 

[Abhi Mevawala]

Hai guys.Anyone have idea about this question.Just want to ask why option 3 is rejected .Thanks guys.

the ans here is D
becoz the second option is wrong as when HBr reacts with any alkene H and Br both go on different carbon atoms nt the same one

 

[Abhi Mevawala]

my doubtzz

 

[Abhi Mevawala]

got few more

 

[Abhi Mevawala]

 

[periyasamy]

the ans here is D
becoz the second option is wrong as when HBr reacts with any alkene H and Br both go on different carbon atoms nt the same one

Sorry bro,i rechecked it but the answer is B that is option 1 and 2 rite.Thanks a lot.

 

[periyasamy]

my doubtzzView attachment 33040View attachment 33041View attachment 33042

For 1st question.

 

[Abhi Mevawala]

watzz the ans.............

 

[periyasamy]

ans is c.Rite?

 

[Abhi Mevawala]

yyup bt hw?

 

[periyasamy]

Check the file,i sent...First findnthe mole of co2.Then using the formula judge the no of mole of the aluminium compound.Then u will get the molar mass by using the mole formula.Finally u will get 144.Try each of the 4 options n u will get c.Hope it helps.

 

[Abhi Mevawala]

thnxx
hey can u solv this

 

[periyasamy]

thnxx
hey can u solv thisView attachment 33053

Is the answer a?

 

[snowbrood]

my doubtzzView attachment 33040View attachment 33041View attachment 33042

for q35
redox reaction mean a chemical reaction in which the oxidation state of the element changes here N is reduced.
NaOcl is a bleaching solution that u have to study in group 7 halogens
nacl has an halogen that reacts with silver nitrate so A is the answer

 

[periyasamy]

Which process could be used to calculate the bond energy for the covalent bond X-Y by dividing its ∆H by n?
A XYn(g)→X(g) + nY(g)
b 2XYn(g)→2XYn-1(g) + Y2(g)
C Y(g) + XYn-1(g)→XYn(g)
D nXY(g)→nX(g) +n/2 Y2(g)
Why is the answer a?
Help guys.Thanks a lot.

 

[periyasamy]

Guys ,just want to ask .For the question below option a is selected is it because it has something to do with the"in situ"preparation.Thanks a lot.

 

[Jinosupreme]

Guys ,just want to ask .For the question below option a is selected is it because it has something to do with the"in situ"preparation.Thanks a lot.

Answer is D as it is reaction between ketone and 24 DNPH, which is able to done without heating

 

[scouserlfc]

Which process could be used to calculate the bond energy for the covalent bond X-Y by dividing its ∆H by n?
A XYn(g)→X(g) + nY(g)
b 2XYn(g)→2XYn-1(g) + Y2(g)
C Y(g) + XYn-1(g)→XYn(g)
D nXY(g)→nX(g) +n/2 Y2(g)
Why is the answer a?
Help guys.Thanks a lot.

Remember what bond energy is,it is the energy released when a covalent bond of a gaseous molecule is broken to give gaseous atoms and not molecules or compounds or molecules. So in A only is this happening in the rest of the options ∆H not only contains the bond breaking energy but also bond formation so the resulting ∆H for B,C and D is lesser than the value of X----Y bond energy !
I hope you get it its pretty simple just try to understand and ask any question no matter how childish it is about this explanation !

 

[periyasamy]

Remember what bond energy is,it is the energy released when a covalent bond of a gaseous molecule is broken to give gaseous atoms and not molecules or compounds or molecules. So in A only is this happening in the rest of the options ∆H not only contains the bond breaking energy but also bond formation so the resulting ∆H for B,C and D is lesser than the value of X----Y bond energy !
I hope you get it its pretty simple just try to understand and ask any question no matter how childish it is about this explanation !

Thanks bro.

 

[periyasamy]

Answer is D as it is reaction between ketone and 24 DNPH, which is able to done without heating [/quote
Thanks boss,i understand it.But the answer i checked it n it shows a.