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(A]: The neem is used as a natural insec...

(A]: The neem is used as a natural insecti- cide.
[R]: The extract of neem contains azadirachtin which acts as an antifeedant compound.

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

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The correct Answer is:
A
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Assertion: Neem is used as a natural insecticide. Reason: The neem extract contains azadirachtin which acts as an antifeedant compound.

Zeolites are minerals of the composition M_((x/n)) [[AlO_2]_x (SiO_2)_y].ZH_2O Where 'n' is the charge on the metal cation. These structure contain various ring which results in formation of a fairly open structure containing channels and cavities at molecular level (2 to 11A) in diameter). They may be used to trap molecules of various sizes, this makes them very useful as "Selective absorbants" or as "molecular sieves". In the structure of zeolites: (A) Each Al atom is attached to 'p' oxygen atoms directly (B) Each Si atom is attached to 'q' oxygen atoms directly (C) Each Al atom is attached to 'r' Si atoms directly (D) Each O atom will use 't' difference hybridized orbitals. Find (p+q+r+t)

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