Decarboxylation Reaction of Alkanes

Q. 500 ml of a gaseous hydrocarbon when burnt in excess of o2 gave 2.5 lt of co2 and 3lt of h2o vapours under same conditions. molecular formula of the hydrocarbon is ? a)c4h8 b)c4h10 c)c5h10 d)c5h12

Q. Describe the preparation of alkene with their mechanism?

Q. Consider the change in oxidation state of bromine corresponding to different emf values as shown in the given diagram:

$Br{O}_4^{-}\stackrel{1.82V}{\to }Br{O}_3^{-}\stackrel{1.50V}{\to }HBrO\stackrel{1.595V}{\to }B{r}_2\stackrel{1.065V}{\to }B{r}^{-}$

Then the species undergoing disproportionation is

1. $HBrO$
2. $Br{O}_4^{-}$
3. $Br{O}_3^{-}$
4. $B{r}_2$

Q. oxidation no. of chlorine in caocl2

Q.

$C{H}_{3}COONa\underset{CaO}{\overset{NaOH}{\to }}A\underset{C{l}_2/hv}{\overset{Onemole}{\to }}B\underset{Ether}{\overset{Na}{\to }}C\stackrel{(C{H}_{3}COO{)}_{2}Mn}{\to }D$. Incorrect statement is

1. A and C are homologues

2. Salt of D on Kolbe's electrolysis gives C

3. C can exhibit conformational isomerism

4. B on reduction with Zn / HCl gives methane

Q. Anhydrous sodium acetate on heating with sodalime gives

1. Acetic acid
2. Methane
3. Calcium acetate
4. Ethane

Q. { 14. }3 -Phenyl propene on reaction with HBr gives }} (as a major product) }{ (1) }C_6H_5CH_2CH(Br)CH_3}{ (2) }C_6H_5CH_2CH(Br)CH_2CH_3}{ (3) }C_6H_5CH_2CH_2CH_2Br}{ (4) }C_6H_5CH(Br)CH=CH_2

Q. describe the principle involved in the electrolysis of molten sodium chloride.

Q. 16. Why alkene is more reactive towards electrophillic addition than alkyne?

Q. For the reduction of ketones to hydrocarbon, the appropriate agent is

1. $HI$
2. $Zn-Hg/HCl$
3. Red phosphorous
4. $H_{2}S{O}_4$