Identify the correct formula of oleum from the following :

H_{2} S_{2} O_{7}

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H_{2} S O_{3}

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H_{2} S O_{4}

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H_{2} S_{2} O_{8}

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Solution

The correct option is A $H_{2} S_{2} O_{7}$
The correct formula of oleum is $H_{2} S_{2} O_{7}$ . Pyrosulphuric acid or oleum $(+ 6)$ is $H_{2} S_{2} O_{7}$ which is obtained by dissolving $S O_{3}$ and is called fuming sulphuric acid.

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Identify the correct formula of halides of alkaline earth metals from the following .
(a) $B a C l_{2} . 2 H_{2} O$ (b) $B a C l_{2}$ (c) $C a C l_{2} . 6 h_{2} O$ (d) $S r C l_{2} . 4 H_{2} O$

Identify the incorrect formula from the following options.

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Identify the correct formula of oleum from the following :

The correct option is A H2S2O7The correct formula of oleum is H2S2O7. Pyrosulphuric acid or oleum (+6) is H2S2O7 which is obtained by dissolving SO3 and is called fuming sulphuric acid.

The correct option is A $H_{2} S_{2} O_{7}$
The correct formula of oleum is $H_{2} S_{2} O_{7}$ . Pyrosulphuric acid or oleum $(+ 6)$ is $H_{2} S_{2} O_{7}$ which is obtained by dissolving $S O_{3}$ and is called fuming sulphuric acid.