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Physical Properties of Boron Family

Which of the ...

Question

Which of the following compound is amphoteric?

A

A l_{2} O_{3}

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B

C r O_{3}

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C

S O_{2}

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D

C O_{2}

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Solution

The correct option is A $A l_{2} O_{3}$
An amphoteric oxide is an oxide that can act as either an acid or base in a reaction to produce a salt and water.

$A l_{2} O_{3}$ reacts with acid as well as base. Hence, it is amphoteric in nature.

Hence, option A is correct.

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Q. (a) What are amphoteric oxides? Give two examples of amphoteric oxides.
(b) Choose the acidic oxides, basic oxides and neutral oxides from the following:
Na₂O; CO₂; CO; SO₂; MgO; N₂O; H₂O.
(c) Which of the following are amphoteric oxides:
MgO, ZnO, P₂O₃, Al₂O₃, NO₂

Q. Which of the following is amphoteric oxide?

M n_{2} O_{7}, C r O_{3}, C r_{2} O_{3}, C r O, V_{2} O_{5}, V_{2} O_{4}

Q. Classify the following oxides into acidic, basic and amphoteric.

C a O

M g O

C O_{2}

S O_{3}

N a_{2} O

Z n O

A l_{2} O_{3}

F e_{2} O_{3}

Q. Which one of the following is an amphoteric oxide?

B_{2} O_{3}, A l_{2} O_{3}

Q. (a) Classify following oxides as neutral, acidic, basic or amphoteric:

C O, B_{2} O_{3}, S i O_{2}, C O_{2}, A l_{2} O_{3}, P b O_{2}, T l_{2} O_{3}

(b) Write suitable chemical equations to show their nature.

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