Question

H2SO4 is a strong acid but behaves as a base in liquid NH3​

Answer 1

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NH3 → NH4Cl + NaNH2 NaCl + 2 NH3 Acid Base Salt Solvent HCl + NaOH ... HSO4 – ions will act as base and any species producing H3SO4+ ions acts as an acid in H2SO4

Answer 2

Explanation:

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The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power. A positive focal length indicates that a system converges light, while a negative focal length indicates that the system diverges light

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