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Assertion (A): If aluminium atom s repla...

Assertion (A): If aluminium atom s replace a few silicon atoms in three dimensional network of silicon dioxide, the overall structure acquries a negative charge.
Reason(R): Aluminium is trivalent while silicon is tetravalent.

A

Both A and R are correct and R is the correct explanation of A

B

Both A and R are correct but R is not the correct explanation of A

C

Both A and R are not correct

D

A is not correct but R is correct

Text Solution

Verified by Experts

The correct Answer is:
d
Assertion is not correct but reason is correct. Aluminium is trivalent whereas silicon is tetravalent. If aluminium atom replaces a few silicon atoms in three dimensional network of silicon dioxide, the overall structure acquires neutrally.
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Assertion (A) : CO_2 is a gas but SiO_2 had a three -dimenstional network structurte . Reason (R): CO_2 bonds nut SiO_2 has a three-dimensional network structure .

(A) ZSM-5 is used as a catalyst in petrochemical industries. (R) Zeolites are three-dimensional network silicates in which some atoms are replaced by luminium atoms.

Knowledge Check

  • Assertion (A) : If aluminium atoms replace a few silicon atoms in three dimensional network of silicon dioxide, the overall structure acquires a negative charge. Reason (R) : Aluminium is trivalent while silicon is tetravalent.

    A
    Both A and R are correct and R is the correct explanation of A.
    B
    Both A and R are correct and R is not the correct explanation of A.
    C
    Both A and R are not correct.
    D
    A is not correct but R is correct.

  • Assertion: ZSM-5 is used as a catalyst in petrochemical industries. Reason: Zeolites are three dimensional network Silicates in which some silicon atoms are replaced by aluminium atoms.

    A
    if both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
    if both assertion and reson are true but reason is not the correct explanation of the assertion.
    C
    If assertion is true but reason is false.
    D
    If the assertion and reason both are false.

  • Assertion (A) : CO_2 is a gas but SiO_2 had a three -dimenstional network structurte . Reason (R): CO_2 bonds nut SiO_2 has a three-dimensional network structure .

    A
    If both (A) and (R) are correct and (R) is correct explanation of (A)
    B
    If both (A) and (R) are correct and (R) is not correct explanation of (A)
    C
    If (A) is correct , but (R) is incorrect
    D
    If (A) is incorrect but (R) is correct .