A student added \[10\,\,ml-12\,\,ml\] of Conc. \[{{H}_{2}}S{{O}_{4}}\]in a test tube containing \[5\,\,g-6\,\,g\] of sugar crystals and warmed it gently. He noticed that white crystals slowly turned brown and became a black mass. What happened in this change?

\[{{H}_{2}}S{{O}_{4}}\] turned black but no change took place.

Sugar got charred by the action of hot. conc. \[{{H}_{2}}S{{O}_{4}}\]and a chemical change took place.

It is an irreversible physical change.

A student added \[10\,\,ml-12\,\,ml\] of Conc. \[{{H}_{2}}S{{O}_{4}}\]

1.	A student added \[10\,\,ml-12\,\,ml\] of Conc. \[{{H}_{2}}S{{O}_{4}}\]in a test tube containing \[5\,\,g-6\,\,g\] of sugar crystals and warmed it gently. He noticed that white crystals slowly turned brown and became a black mass. What happened in this change?
A.	\[{{H}_{2}}S{{O}_{4}}\] turned black but no change took place.
B.	Sugar got charred by the action of hot. conc. \[{{H}_{2}}S{{O}_{4}}\]and a chemical change took place.
C.	It is only a physical change.
D.	It is an irreversible physical change.
Answer» C. It is only a physical change.

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A student added \[10\,\,ml-12\,\,ml\] of Conc. \[{{H}_{2}}S{{O}_{4}}\]in a test tube containing \[5\,\,g-6\,\,g\] of sugar crystals and warmed it gently. He noticed that white crystals slowly turned brown and became a black mass. What happened in this change?

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