Which method/process is used to prepare sulph | vedclass

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(A) The $Contact$ process is the industrial method used for the production of sulphuric acid $(H_2SO_4)$.In this process,sulphur dioxide $(SO_2)$ is o

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Contact process

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(A) The $Contact$ process is the industrial method used for the production of sulphuric acid $(H_2SO_4)$.In this process,sulphur dioxide $(SO_2)$ is oxidized to sulphur trioxide $(SO_3)$ in the presence of a vanadium pentoxide $(V_2O_5)$ catalyst,which is then absorbed in concentrated sulphuric acid to form oleum $(H_2S_2O_7)$,followed by dilution with water.$Haber's$ process is used for the synthesis of ammonia $(NH_3)$.$Oswald$ method is used for the production of nitric acid $(HNO_3)$.$Frasch$ method is used for the extraction of elemental sulphur from underground deposits.

$X$	$Y$
$1.$ Dehydrating agent	$p.$ Sulphur dioxide gas
$2.$ In preparation of firecrackers	$q.$ Concentrated sulphuric acid
$3.$ Weak bleaching agent	$r.$ Dihydrogen gas
$4.$ Lightest gas	$s.$ Sulphur

Which method/process is used to prepare sulphuric acid?

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$X$ $Y$
$1.$ Dehydrating agent $p.$ Sulphur dioxide gas
$2.$ In preparation of firecrackers $q.$ Concentrated sulphuric acid
$3.$ Weak bleaching agent $r.$ Dihydrogen gas
$4.$ Lightest gas $s.$ Sulphur

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