JEE Main 2023 (Online) 11th April Morning Shift | p-Block Elements Question 45 | Chemistry

1

JEE Main 2023 (Online) 11th April Morning Shift

MCQ (Single Correct Answer)

+4

-1

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

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

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

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

$$\Delta_{\mathrm{eg}} \mathrm{H}(\mathrm{Se})<\Delta_{\mathrm{eg}} \mathrm{H}(\mathrm{S})$$