Practice free Chemistry NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Shifting of electrons of a multiple bond under the influence of a reagent is called:
(b) It is definition of electromeric effect.
Which of the following statement is correct?
(a) Allyl carbocation undergoes resonance stabilization.
The compound which gives the most stable carbocation on dehydration:
(b) 30 carbocation is most stable.
Which of the following acids has the smallest dissociation constant?
(c) BrCH2CH2COOH is the weakest acid and have lowest dissociation constant because I.E. of Br is lesser than F and is far away from -COOH group.
Which of the following resonating structures of 1-methoxy-1,3-butadiene is least stable ?
(c) The octet of all atoms are complete in structures that of option (a) and (b). In structure that of option (d) electron deficiency of positively charged carbon is duly compensated by lone pair electrons of adjacent oxygen atom while such neighbour group support is not available in structure that of option (c).
The production of an optically active compound from a symmetric molecule without resolution in termed as:
(c) It is definition of asymmetric synthesis.
Buta-1,3-diene and But-2-yne are:
Two double bonds are treated as different functional group with a triple bond.
The number of different substitution products possible when ethane is allowed to react with Clorine in sunlight are:
When ethane (C2H6) reacts with chlorine in the presence of sunlight (free radical chlorination), it can give nine different substitution products: C2H5Cl, C2H4Cl2, C2H3Cl3, C2H2Cl4, C2HCl5, C2Cl6, CH3CHCl2, CH2ClCHCl2, and CHCl2CHCl2.
In butane, which of the following forms has the lowest energy?
(c) The staggered form has lower energy than eclipsed form because of repulsive interaction between the H-atoms attached to two carbon atoms are minimum due to maximum distance between them.
The group named as benzal possesses .... nature.
(b) Benzal is C6H5CH group.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.