1
JEE Main 2023 (Online) 31st January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Choose the correct set of reagents for the following conversion.

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

A
$$\mathrm{Br_2,alc\cdot KOH,NaNH_2,H_2}$$ Lindlar Catalyst
B
$$\mathrm{Br_2,aq\cdot KOH,NaNH_2,Na}$$ (Liq NH$$_3$$)
C
$$\mathrm{Br_2,alc\cdot KOH,NaNH_2,Na}$$ (Liq NH$$_3$$)
D
$$\mathrm{Br_2,aq\cdot KOH,NaNH_2,H_2}$$ Lindlar Catalyst
2
JEE Main 2023 (Online) 31st January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which transition in the hydrogen spectrum would have the same wavelength as the Balmer type transition from $$\mathrm{n=4}$$ to $$\mathrm{n}=2$$ of $$\mathrm{He}^{+}$$ spectrum

A
$$\mathrm{n}=3$$ to $$\mathrm{n}=4$$
B
$$\mathrm{n}=2$$ to $$\mathrm{n}=1$$
C
$$\mathrm{n}=1$$ to $$\mathrm{n}=2$$
D
$$\mathrm{n}=1$$ to $$\mathrm{n}=3$$
3
JEE Main 2023 (Online) 31st January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Adding surfactants in non polar solvent, the micelles structure will look like

JEE Main 2023 (Online) 31st January Morning Shift Chemistry - Surface Chemistry Question 22 English

A
d
B
a
C
c
D
b
4
JEE Main 2023 (Online) 31st January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

$$\mathrm{H}_{2} \mathrm{O}_{2}$$ acts as a reducing agent in :

A
$$\mathrm{Mn}^{2+}+2 \mathrm{H}_{2} \mathrm{O}_{2} \rightarrow \mathrm{MnO}_{2}+2 \mathrm{H}_{2} \mathrm{O}$$
B
$$2 \mathrm{Fe}^{2+}+2 \mathrm{H}^{+}+\mathrm{H}_{2} \mathrm{O}_{2} \rightarrow 2 \mathrm{Fe}^{3+}+2 \mathrm{H}_{2} \mathrm{O}$$
C
$$\mathrm{Na}_{2} \mathrm{S}+4 \mathrm{H}_{2} \mathrm{O}_{2} \rightarrow \mathrm{Na}_{2} \mathrm{SO}_{4}+4 \mathrm{H}_{2} \mathrm{O}$$
D
$$2 \mathrm{NaOCl}+\mathrm{H}_{2} \mathrm{O}_{2} \rightarrow 2 \mathrm{NaCl}+\mathrm{H}_{2} \mathrm{O}+\mathrm{O}_{2}$$
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