Assertion :Hydrofluoric acid etches glass. Reason: It is a strong acid.

Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1

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Both the Statement 1 and Statement 2 are correct and Statement 2 is not the correct explanation of Statement 1.

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Statement 1 is correct but Statement 2 is not correct.

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Statement 1 is not correct but Statement 2 is correct.

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Solution

The correct option is C Statement 1 is correct but Statement 2 is not correct.
Hydroflouric acid is a solution of hydrogen flouride in water.
It is a colourless solution which is highly corrosive and is capable of dissolving many materials.
It etchs glass by reacting with silicon dioxide to form gaseous silicon flouride.
${S i O}_{2} + 4 H F \to {S i F}_{4} + {2 H}_{2} O$

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