Bond angle in water molecule is: a.100^ b.90^ c.105^ d.110^

Answers 2

a.100^

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Answer:

Bond angle in water molecule is 105o due to two lone pair of electrons on oxygen atom causes lone pair-bond pair repulsions.

Explanation:

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The ratio of mass of proton to electron is about: a.1.8 x 10^-3 b.1.8 x 10^3 c.1 d.0

Explanation:

Correct option is B)

The mass of electron is 9.1×10-³⁷㎏

The mass of proton is 1.67×10-²⁷㎏

Thus mass of proton is 1.67×10-²⁷/9.1×10-³⁷ ≃1.8×10³

Mass of electron. Thus answer is option B

Highly volatile metal is: | Chemistry Questions a.V b.Cr c.Mn d.Zn

Explanation:

Zn is the highest volatile material

Explanation:

Correct option is D)

Among Vanadium, Chromium, Manganese and Zinc, Zinc is most volatile.

Group 12 elements are volatile in nature.

All other transition series elements have incomplete d or s or both orbitals thus they can form covalent as well as an ionic bond. While in Zn, d and s orbitals are completely filled so they can form only metallic bonds. And since the metallic bond is weak it makes Zn volatile.

The prefixes syn - and anti - are used to denote : a.structural isomers b.conformational isomers c.geometrical isomers d.optical isomers

Answer:

Conformational isomers

Explanation:

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CORRECT ANSWER IS OPTION C)GEOMETRICAL ISOMERS

  • Explanation:

Geometrical isomerism is due to restricted rotation about the double bond.

The prefixes syn and anti are used to denote geometrical isomerism.

Syn: it is used to indicate that both H and OH are present on the same side of the double bond.

Anti: it is used to indicate that H and OH are present on the opposite sides of the double bond.

Hence, the answer is geometrical isomers.

The pre - exponential factor in the Arrhenius equation of a second order reaction has the units: a.mol L^-1 s^-1 b.L mol^-1 s^-1 c.s^-1 d.Dimensionless

Answer:

Dimensionless

Explanation:

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