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Oxygen Family



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Q1. What is the electron gain enthalpy for noble gases?

(a) > 0
(b) < 0
(c) = 0
(d) It is not defined for noble gases

Q2. What is the ratio of the molar heat at constant pressure to the molar heat at constant volume for a noble gas?

(a) 1.5
(b) 1.67
(c) 1.73
(d) 1.37

Q3. Which of the following statements is incorrect about noble gases?

(a) They are monoatomic
(b) They are colourless
(c) They are odourless
(d) They all have an outer electronic configuration of ns2np6

Q4. Which of the following noble gases is not obtained via fractional distillation?

(a) Krypton
(b) Argon
(c) Neon
(d) Helium

Q5. What are the decay products of radium?

(a) Radon and oxygen
(b) Radon and nitrogen
(c) Lanthanum and oxygen
(d) Radon and Helium

Q6. What is the half-life of radon?

(a) 10 days
(b) 4.56 days
(c) 3.82 days
(d) 5.46 days

Q7. Which of the following scientists first discovered helium in the solar spectrum during a total solar eclipse?

(a) Lord Rayleigh
(b) J N Lockyer
(c) William Ramsay
(d) Antoine Lavoisier

Q8. The main commercial source of helium is natural gas.

(a) True
(b) False
(c) Both acidolysis and aldehyde
(d) None of the mentioned

Q9. Which of the following is the second most abundant noble gas in the atmosphere?

(a) Helium
(b) Argon
(c) Neon
(d) Krypton

Q10. Which of the following noble gases do not occur in the elemental state in the atmosphere?

(a) Helium
(b) Neon
(c) Argon
(d) Radon


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Reaction Of PCl3 And PhMgBr Would Give

Modified 363 Year Ago

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363 Year Ago

Reaction Of PCl3 And PhMgBr Would Give

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448 views

Zinc And Cold Dil.HNO3 Reacts To Produce

Modified 363 Year Ago

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363 Year Ago

Zinc And Cold Dil.HNO3 Reacts To Produce

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446 views

Master’s In Communication Program

Modified 281 Year Ago Rohandavid

446
Rohandavid
281 Year Ago

Master’s In Communication Program

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384 views

Hydrogen Can Be Prepared By The Action Of Dil.

Modified 233 Year Ago

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233 Year Ago

Hydrogen Can Be Prepared By The Action Of Dil.

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381 views

Which Statement Is Not True About Potash Alum?

Modified 306 Year Ago

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306 Year Ago

Which Statement Is Not True About Potash Alum?

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380 views

Carbogas Is A Mixture Of

Modified 201 Year Ago

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201 Year Ago

Carbogas Is A Mixture Of

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372 views

The Number Of Hydrogen Atoms Attached To Phosphorus Atom In Hypochlorous Acid Is:

Modified 302 Year Ago

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302 Year Ago

The Number Of Hydrogen Atoms Attached To Phosphorus Atom In Hypochlorous Acid Is:

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