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

Answers 1

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

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Other related questions that may help you

In an exothermic reaction, the reactants: a.have less energy than the products formed. b.have more energy than the products formed. c.are at lower temperature than products. d.energy is released during reaction.

Answer:

correct option is B

Explanation:

So, the products formed will comparatively have less energy than reactants. - Therefore, in an exothermic reaction, the reactants have more energy than the products formed. - Therefore, the answer is option (B). Note: Remember exothermic reactions are bond-making processes and therefore, energy is released.

Answer:

This question has multiple correct options

Explanation:

Correct options are B) and D)

In an exothermic reaction, △H= negative.

Therefore, energy is released during the reaction.

The reactants have more energy than the product

Steam distillation is used for the extraction of. a.essential oil b.higher alkynes c.mineral oils d.fatty acids

  • d.fatty acids

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Explanation:

Option b) Essential oil. Steam distillation is used to separate essentials oils.

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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.

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

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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