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The colour of the X(2) molecules of grou...

The colour of the `X_(2)` molecules of group 17 elements changes gradually from yellow to violet down the group. This is due to

A

Decrease in `pi`*-`sigma`* gap down the group

B

The physical state of `X_2` at room temperature changes from gas to solid down the group

C

c

D

decrease in HOMO-LUMO gap down the group

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The correct Answer is:
A, D
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MOTION-CHEMICAL BONDING -EXERCISE -4 LEVEL-II
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  2. The shape of XeO2F2 molecule is

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  3. With respect to graphite and diamond, which of the statements given be...

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  4. Which ordering of compounds is according to the decreasing order of th...

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  5. The correct statement about O3 is(are)

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  6. A list of species having the formula of XZ(4) is given below XeF(4), S...

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  7. When O(2) is adsorbed on a metallic surface, electron transfer occurs...

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  8. Under hydrolysis conditions, the compounds used for preparation of lin...

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  9. The total number of lone pair of electrons in N(2)O(3) is

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  10. Among the triatomic molecules/ions BeCl(2),N(3)^(-),N(2)O, NO(2)^(+), ...

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  11. The correct statement(s) regarding, (i) HClO, (ii) HClO(2), (iii) HC...

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  12. The crystalline form of borax has

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  13. The compound(s) with two lone pairs of electron on the central atom is...

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  14. MOLECULAR ORBITAL THEORY

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  15. The colour of the X(2) molecules of group 17 elements changes graduall...

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  16. The sum of the number of lone pairs of electrons on each central atom ...

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  17. Among H(2), He(2)^(+), Li(2), Be(2), B(2), C(2), N(2), O(2)^(-) and F(...

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  18. The order of the oxidation state of the phos- phorus atom in H3PO2, H3...

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  19. Among the following, the correct statement(s) is(are) :

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  20. The total number of compounds having at least one bridging oxo group a...

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