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Group \( 13 \) elements react with \( \mathrm{O}_2 \) in amorphous form to form oxides of type \( \mathrm{M}_2\mathrm{O}_3 \) (\( \mathrm{M} = \) element). Which among the following is the most basic oxide?

The correct order of bond enthalpy \( \mathrm({kJ \, mol^{-1}} \)) is:

For compound having the formula \( \mathrm{GaAlCl_4} \), the correct option from the following is:

For a good quality cement, the ratio of silica to alumina is found to be:

The normal rain water is slightly acidic and its pH value is \( 5.6 \) because of which one of the following?

During water-gas shift reaction.

For electron gain enthalpies of the elements denoted as \( \Delta_{eg}H \), the incorrect option is:

Given below are two statements:
Statement I: Boron is extremely hard indicating its high lattice energy
Statement II: Boron has highest melting and boiling point compared to its other group members.
In the light of the above statements, choose the most appropriate answer from the option given below

Given below are two statements:
Statement I: Upon heating a borax bead dipped in cupric sulphate in a luminous flame, the colour of the bead becomes green
Statement II: The green colour observed is due to the formation of copper(I) metaborate
In the light of the above statements, choose the most appropriate answer from the options given below:

The incorrect statement from the following for borazine is:

Which one of the following elements will remain as liquid inside pure boiling water?

The Lewis acid character of boron tri halides follows the order:

Sum of oxidation state \( P \) of bromine in bromic acid and perbromic acid is:

If the formula of borax is \( \mathrm{Na_2B_4O_x(OH)_y \cdot zH_2O} \), then \( x + y + z = \) _________.

\( \mathrm{XeF_4} \) reacts with \( \mathrm{SbF_5} \) to form \( [\mathrm{XeF}_m]^{n+}[\mathrm{SbF}_y]^{z-} \). \( m + n + y + z = \) ________.

Match List I with List II.

Choose the correct answer from the options given below:

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JEE Main 2023 13th April Evening Shift

If the formula of borax is \( \mathrm{Na_2B_4O_x(OH)_y \cdot zH_2O} \), then \( x + y + z = \) _________.