JEE Main 2023 (Online) 31st January Morning Shift | Hydrocarbons Question 52 | Chemistry

trans $$\left(\mathrm{Ph}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_{3}\right) \rightarrow \operatorname{cis}\left(\mathrm{Ph}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_{3}\right)$$

$$\mathrm{Br_2,alc\cdot KOH,NaNH_2,H_2}$$ Lindlar Catalyst

$$\mathrm{Br_2,aq\cdot KOH,NaNH_2,Na}$$ (Liq NH$$_3$$)

$$\mathrm{Br_2,alc\cdot KOH,NaNH_2,Na}$$ (Liq NH$$_3$$)

$$\mathrm{Br_2,aq\cdot KOH,NaNH_2,H_2}$$ Lindlar Catalyst

JEE Main 2023 (Online) 30th January Morning Shift

MCQ (Single Correct Answer)

-1

The major products 'A' and 'B', respectively, are

JEE Main 2023 (Online) 30th January Morning Shift Chemistry - Hydrocarbons Question 56 English

JEE Main 2023 (Online) 30th January Morning Shift Chemistry - Hydrocarbons Question 56 English Option 3

JEE Main 2023 (Online) 30th January Morning Shift Chemistry - Hydrocarbons Question 56 English Option 4

JEE Main 2023 (Online) 29th January Evening Shift

MCQ (Single Correct Answer)

-1

The one giving maximum number of isomeric alkenes on dehydrohalogenation reaction is (excluding rearrangement)

2-Bromo-3,3-dimethylpentane

2-Bromopropane

1-Bromo-2-methylbutane

2-Bromopentane

JEE Main 2023 (Online) 25th January Morning Shift

MCQ (Single Correct Answer)

-1

JEE Main 2023 (Online) 25th January Morning Shift Chemistry - Hydrocarbons Question 53 English

The correct sequence of reagents for the preparation of Q and R is :

$$\mathrm{(i)C{r_2}{O_3},770K,20~atm; (ii)Cr{O_2}C{l_2},{H_3}{O^ + }; (iii)NaOH;(iv){H_3}{O^ + }}$$

$$\mathrm{(i)Cr{O_2}C{l_2},{H_3}{O^ + };(ii)C{r_2}{O_3},770K,20~atm;(iii)NaOH;(iv){H_3}{O^ + }}$$

$$\mathrm{(i)KMn{O_4},O{H^ - };(ii)M{o_2}{O_3},\Delta ;(iii)NaOH;(iv){H_3}{O^ + }}$$

$$\mathrm{(i)M{o_2}{O_3},\Delta ;(ii)Cr{O_2}C{l_2},{H_3}{O^ + };(iii)NaOH;(iv){H_3}{O^ + }}$$

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