Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

41.

The complex, [Pt (Py)(NH3)BrCl] will have how many geometrical isomers?

  • 4

  • 0

  • 2

  • 2


D.

2

The complex is square planar and is of the type [M(abcd)]. It has three geometrical isomers.


943 Views

42.

Clemmensen reduction of a ketone is carried out in the presence of which of the following?

  • Zn -Hg with HCl

  • LiAlH4

  • H2 and Pt as catalyst

  • H2 and Pt as catalyst


A.

Zn -Hg with HCl

The reducing agent used in Clemmensen reduction is Zn - Hg and HCl.

greater than straight C space equals space straight O space rightwards arrow with Zn space minus Hg space divided by space HCl on top space greater than CH subscript 2

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43.

In a set of reactions, m-Bromo benzoic acid g ave a product D. Identify the product D. 



B.

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44.

In the following reactions,



the major (A) and (C) are respectively


A.

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45.

Of the following complex ions, which is diamagnetic in nature?

  • [Ni(CN)4]2-

  • [CuCl4]2-

  • [CoF6]3-

  • [CoF6]3-


A.

[Ni(CN)4]2-

Electronic configuration of Ni2+ in [Ni(CN)4]2- is Ni2+ = 3d8 4s0


therefore,  [Ni(CN)4]2- is diamagnetic (because of the absence of the unpaired electron).
995 Views

46.

Which one of the following statements is not true regarding (+) lactose?

  • (+) lactose is a  β - glycoside formed by the union of a molecule of D (+) galactose

  • (+) lactose is a reducing sugar and does not exhibit mutarotation

  • (+) lactose, C12H22O11 contains 8 - OH groups

  • (+) lactose, C12H22O11 contains 8 - OH groups


B.

(+) lactose is a reducing sugar and does not exhibit mutarotation



Lactose is a reducing sugar and all reducing sugars show mutarotation.
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47.

What is the product obtained in the following reaction?


D.

Reduction of nitrobenzene with Zn/NH4Cl (neutral medium) gives phenyl hydroxyamine.


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48.

Which one is a nucleophilic substitution reaction among the following?


B.

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49.

Which one of the following is employed as antihistamine?

  • Diphenyl hydramine

  • Norethindrone

  • Omeprazole

  • Omeprazole


A.

Diphenyl hydramine

Diphenyl hydramine (Benadryl) is used as an antihistamine

623 Views

50.

Of the following which one is classified as polyester polymer?

  • Bakelite

  • Melamine

  • Nylon-66

  • Nylon-66


D.

Nylon-66

Terylene is a polyester polymer because it is formed by the monomer units terephthalic acid and ethylene glycol.

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