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(i) Which allotrope of phosphorus is mor...

(i) Which allotrope of phosphorus is more reactive and why ?
(ii) How are the supersonic jet aeroplanes responsible for the depletion of ozone layers ?
(iii) `F_(2)` has lower bond dissociation enthalpy than `Cl_(2)`. Why ?
(iv) While noble gas is used in filling balloons for meterological observations ?

A

CO

B

NO

C

`SO_2`

D

`O_2`

Text Solution

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The correct Answer is:
B
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Which of the following statements are True (T) or False (F)? Mark them and select the answer from the codes given below. (I) Ozone is not responsible for greenhouse effect. (II) Ozone can oxidize SO_(2) present in the atmosphere to SO_(3) (III) Ozone hole is thinning of ozone layer present in stratosphere. (IV) Ozone is produced in the upper stratosphere by the action of UV rays on oxygen.

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Molecular orbitals are formed by the overlap of atomic orbitals. The combining orbitals must have proper orientation so that they can overlap to a considerable extent. Two atomic orbitals combine to form two molecular orbitals called bonding molecular orbital and antibonding molecular orbital. Bonding molecular orbital is stable and antibonding molecular orbital is unstable. sigma MO is formed by head on overlap while pi MO is formed by sidewise overlap. The MOs are filled with electrons according to the same rules as followed for filling atomic orbitats. Bond order is one of the most important parameter to compare the bond strength and bond length of bonds. Why has N_2 a larger dissociation energy than N_2 ^(+) whereas O_2 has a lower dissociation energy than O_(2)^(+) ?

MODERN PUBLICATION-ENVIRONMENTAL POLLUTION -COMPETITION FILE (OBJECTIVE TYPE QUESTIONS (B. MULTIPLE CHOICE QUESTIONS ))
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  4. C Cl(4) and freons :

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  6. The gas leaked from a storage tank of the Union Carbide plant in Bhopa...

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  7. Minamata disease is due to

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  8. Among the following, the one that is not a green house gas is

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  9. Green chemistry deals with study of ?

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  10. The wrong statement among the following is :

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  11. The concentration of fluoride, lead, nitrate and iron in a water sampl...

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  12. Which one of the following is not a common component of photochemical ...

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  13. A water sample has ppm level concentration of following anions F^(-)...

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  14. Green fuel is the obtained from

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  15. Which of the following is present in maximum amount in acid rain ?

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  16. The recommended concentration of fluoride ion in drinking water is up ...

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  17. The molecule that has minimum/no role in the formation of photochemica...

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