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JEE Main 17 March 2021, Shift 1, Chemistry Q54

Question 54 of 90 in this shift, Chemistry question 24 of 30, Section B.

The standard enthalpies of formation of

\mathrm{Al_2O_3}

and CaO are

-1675\ \mathrm{kJ\ mol^{-1}}

and

-635\ \mathrm{kJ\ mol^{-1}}

respectively. For the reaction

\mathrm{3CaO + 2Al \rightarrow 3Ca + Al_2O_3}

the standard reaction enthalpy

\Delta_r H^0 =

__________ kJ. (Round off to the Nearest Integer).

Official answer

230

NTA final key.

Same idea in other shifts