204 - Chemistry Questions Answers

The Total energy of one mole of an ideal monoatomic gas at 300K is____.

Asked By: ABHISHEK PAHI
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Joshi sir comment

= 3RT/2 

 

if there are Three Fe+2  For a Fe+3 in FexO, What is the value of x? 

 

Asked By: BONEY HAVELIWALA
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Joshi sir comment

3FeO.1Fe2O3 = Fe5O6 = Fe5/6O

 

 

 

 

 

Zinc but not copper is used for recovery  of Ag From the complex [Ag(CN2)]-  . Why?

 

Asked By: AAYUSH TANEJA
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Joshi sir comment

Zn is better reducing agent in comparison to Cu for the said complex so it is used

besides it answer by sarika is correct too

CH3-(CHBr)-CH2-CH3   +  Na  --------> ?

 

 

Asked By: AAYUSH TANEJA
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Joshi sir comment

in presence of ether it is Wurtz reaction and as obvious many products will be formed.

Major product will be CH3-CH2-CH(CH3)-CH(CH3)-CH2-CH3

Arrange The Following in increasing order of reactivity towards nucleophilic substitution and give reason :

CH3F , CH3Cl , CH3Br , CH3I  .

 

Asked By: AAYUSH TANEJA
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Joshi sir comment
Better the leaving group the compound contains, more reactive the compound will be 
towards the nucleophilic sustitution.
Order of decreasing reactivity. 
 
CH3I > CH3Br > CH3Cl > CH3
 

Arrange The Following in increasing order of dipole moment and give reason :

Dichloromethane , chloroform , carbon tetrachloride .

Asked By: AAYUSH TANEJA
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Joshi sir comment

Dichloromethane > chloroform > carbon tetrachloride 

Arrange The Following in increasing order of boiling points and give reason :

1-chloropropane , isopropylchloride , 1-chlorobutane ,

Asked By: AAYUSH TANEJA
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Joshi sir comment

1-chloropropane < 1-chlorobutane < isopropylchloride

Arrange The Following in increasing order of boiling points and give reason :

Dibromomethane , bromoform , Chloromethane , Dichloromethane .

 

Asked By: AAYUSH TANEJA
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Joshi sir comment

Chloromethane, Dichloromethane, Dibromomethane, Bromoform

B P increases with molecular mass 

 

Which among the following is the strongest oxidizing agent and why??    IO4-  BrO4-  ClO4-       

 

Asked By: AAYUSH TANEJA
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Joshi sir comment

 Inertness of BrO4- at room temperature stands in sharp contrast to its high thermodynamic oxidizing power, which is greater than that of any other oxohalogen ion that persists in aqueous solution. The oxidation potential is
BrO4-+ 2H+ + 2e- -------> BrO3- + H2O                              E =  +1.853 V

(1.201 V for ClO4- and 1.653 V for IO4-)

HOW TO COMPARE FOR HEAT OF COMBUSTION ? WHAT MOST BE STRATERGY TO DECIDE WHICH COMPOUD HAVE MORE EAT OF COMBUTION

Asked By: SIDDHANT
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Joshi sir comment

For this it is necessary to remember all the bond energies

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