1
JEE Main 2023 (Online) 11th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

For compound having the formula $$\mathrm{GaAlCl}_{4}$$, the correct option from the following is :

A
$$\mathrm{Cl}$$ forms bond with both $$\mathrm{Al}$$ and $$\mathrm{Ga}$$ in $$\mathrm{GaAlCl}_{4}$$
B
Oxidation state of $$\mathrm{Ga}$$ in the salt $$\mathrm{GaAlCl}_{4}$$ is +3 .
C
$$\mathrm{Ga}$$ is coordinated with $$\mathrm{Cl}$$ in $$\mathrm{GaAlCl}_{4}$$
D
$$\mathrm{Ga}$$ is more electronegative than $$\mathrm{Al}$$ and is present as a cationic part of the salt $$\mathrm{GaAlCl}_{4}$$
2
JEE Main 2023 (Online) 6th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Match List I with List II

LIST I
Name of reaction
LIST II
Reagent used
A. Hell-Volhard-Zelinsky reaction I. $$NaOH + {I_2}$$
B. Iodoform reaction II. (i) $$Cr{O_2}C{l_2},C{S_2}$$ (ii) $${H_2}O$$
C. Etard reaction III. (i) $$B{r_2}$$ / red phosphorus (ii) $$H_2O$$
D. Gatterman-Koch reaction IV. $$CO,HCl,$$, anhyd. $$AlC{l_3}$$

Choose the correct answer from the options given below:

A
A-III, B-I, C-IV, D-II
B
A-III, B-I, C-II, D-IV
C
A-I, B-II, C-III, D-IV
D
A-III, B-II, C-I, D-IV
3
JEE Main 2023 (Online) 1st February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

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

A
$$\mathrm{C-C > Si-Si > Sn - Sn > Ge-Ge}$$
B
$$\mathrm{Si-Si > C-C > Ge-Ge > Sn-Sn}$$
C
$$\mathrm{C-C > Si-Si > Ge-Ge > Sn-Sn}$$
D
$$\mathrm{Si-Si > C-C > Sn-Sn > Ge-Ge}$$
4
JEE Main 2023 (Online) 1st February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

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

A
$$\Delta_{\mathrm{eg}} \mathrm{H}(\mathrm{I})<\Delta_{\mathrm{eg}} \mathrm{H}(\mathrm{At})$$
B
$$\Delta_{\mathrm{eg}} \mathrm{H}(\mathrm{Te})<\Delta_{\mathrm{eg}} \mathrm{H}(\mathrm{Po})$$
C
$$\Delta_{\mathrm{eg}} \mathrm{H}(\mathrm{Cl})<\Delta_{\mathrm{eg}} \mathrm{H}(\mathrm{F})$$
D
$$\Delta_{\mathrm{eg}} \mathrm{H}(\mathrm{Se})<\Delta_{\mathrm{eg}} \mathrm{H}(\mathrm{S})$$
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