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Q.

(A) : Al liberates hydrogen gas with both NaOH and HCl. 
(R) : Al is amphoteric metal.

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a

(A) is true but (R) is false

b

Both (A) and (R) are true and (R) is the correct explanation of (A)

c

Both (A) and (R) are false

d

Both (A) and (R) are true and (R) is not the correct explanation of (A)

answer is A.

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Detailed Solution

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Amphoteric metals are those metals which react with both acids and bases.

2Al+6HCl2AlCl3+H2

2Al+2NaOH+2H2O2NaAlO2+3H2

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