Day 494: JEE Mains Chemistry

1. A.
   $A = {LiAlH}_{4},\text{ }B = {NaOH}_{(aq)},C = {NH}_{2} - {NH}_{2}/KOH$, ethylene glycol
2. B.
   $A = {LiAlH}_{4},\text{ }B = {NaOH}_{\text{(alc)~}},C = Zn/HCl$
3. C.
   $A = DIBAL - H,B = {NaOH}_{(aq)}$, $C = {NH}_{2} - {NH}_{2}/KOH$, ethylene glycol
4. D.
   $A =$ DIBAL-H, $B = {NaOH}_{\text{(alc)~}},C = Zn/HCl$

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1. A.
   The electrophile involved in the reaction is ${NO}^{+}$
2. B.
   ' $B$ ' is $N$-nitroso ammonium compound
3. C.
   The reaction occurs at low temperature
4. D.
   The product ' $B$ ' formed in the above reaction is p-nitroso compound at low temperature

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1. A.
   Pyranose
2. B.
   Ketohexose
3. C.
   Aldohexose
4. D.
   Heptose

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1. A.
   They are isoelectronic and only two have tetrahedral structures
2. B.
   They are isoelectronic and all have tetrahedral structures
3. C.
   Only two are isoelectronic and all have tetrahedral structures
4. D.
   Only two are isoelectronic and only two have tetrahedral structures

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