Chemistry: Topic-wise Test- 1 - NEET MCQ

Atomic wt. or Cl = 35.5 and of I = 127. According to doeberiner triad rule, At. wt. of Br will be -

The elements of groups, 1, 2, 13, 14, 15, 16 and 17 are collectively called -

Justification of putting H in VII A group is -

There is no S-S bond in

A : tetracyanomethane                           B : Carbondioxide

C : Benzene                                           D : 1, 3-buta-di-ene

Ratio of σ and π bond is in order:

Which of the following models best describes the bonding within a layer of the graphite structure ?

In  , the shape is square planer. The number of bond pair-lone pair repulsion at 90° are :

The critical temperature of water is higher than that of O₂ because the H₂O molecules has :

Among these canonical structures, the correct order of stability is

Amongt these canonical structures which one is least stable ?

CH₂ = CH – CH = CH – CH₃ is more stable than CH₃ – CH = C = CH – CH₃ because

For phenol which ofthe following resonating structure is the most stable ?

Among these three canonical structures (through more are possible) what would be their relative contribution in the hybrid

The most stable resonating structure of following compound is

Which of the following is not a possible termination step in the free radical chlorination of methane?

The major monobromination product which results when ethyl cyclohexane is subjected to free radical bromination, is

Which set of reagent(s) in correct order would accomplish the following transformation?

The major product of the following reaction is

Direction (Q. Nos. 1 - 7) This section contains 7 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE option is correct.

Q. What is true about the reaction given below?

What is major product in the following reaction?

Direction (Q. Nos. 12 and13) This section contains a paragraph, describing theory, experiments, data, etc. Two questions related to the paragraph have been given. Each question has only one correct answer among the four given options (a), (b), (c) and (d).

Passage

Caryophyllene (C₁₅H₂₄) contain a six membered ring and on ozonolysis gives following product.

Q. The structure of caryophyllene is

Caryophyllene (C₁₅H₂₄) contain a six membered ring and on ozonolysis gives following product.

Q. If caryophyllene is treated with 1.0 mole of HCI, a ring closure reaction takes place to form monochloride. What is the most likely product of this reaction?

Ethanol has a higher boiling point than dimethyl ether though they have the same molecular weight. This is due to :

Arrange the following in order of decreasing boiling point :

(I) n-Butane (II) n-Butanol (III) n-Butyl chloride (IV) Isobutane

Which of the following compounds would have significant intermolecular hydrogen bonding ?

HF, CH₃OH, N₂O₄, CH₄

For H₂O₂, H₂S, H₂O and HF , the correct order of decreasing extent of hydrogen bonding is :

A simplified application of MO theory to the hypothetical `molecule' OF would give its bond order as