This chapter is currently out of syllabus
1
JEE Main 2023 (Online) 10th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Given below are two reactions, involved in the commercial production of dihydrogen (H$$_2$$). The two reactions are carried out at temperature "T$$_1$$" and "T$$_2$$", respectively

$$C(s) + {H_2}O(g)\buildrel {{T_1}} \over \longrightarrow CO(g) + {H_2}(g)$$

$$CO(g) + {H_2}O(g)\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{Catalyst}^{{T_2}}} C{O_2}(g) + {H_2}(g)$$

The temperatures T$$_1$$ and T$$_2$$ are correctly related as :

A
T$$_1$$ < T$$_2$$
B
T$$_1$$ = T$$_2$$
C
T$$_1$$ = 100 K, T$$_2$$ = 1270 K
D
T$$_1$$ > T$$_2$$
2
JEE Main 2023 (Online) 8th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Which of the following can reduce decomposition of $$\mathrm{H}_{2} \mathrm{O}_{2}$$ on exposure to light :

A
Urea
B
Glass containers
C
Alkali
D
Dust
3
JEE Main 2023 (Online) 6th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : Loss of electron from hydrogen atom results in nucleus of $$\sim 1.5 \times 10^{-3} \mathrm{pm}$$ size.

Reason R : Proton $$\left(\mathrm{H}^{+}\right)$$ always exists in combined form.

In the light of the above statements, choose the most appropriate answer from the options given below:

A
Both $$\mathbf{A}$$ and $$\mathbf{R}$$ are correct and $$\mathbf{R}$$ is the correct explanation of $$\mathbf{A}$$
B
A is correct but R is not correct
C
A is not correct but R is correct
D
Both $$\mathbf{A}$$ and $$\mathbf{R}$$ are correct but $$\mathbf{R}$$ is NOT the correct explanation of $$\mathbf{A}$$
4
JEE Main 2023 (Online) 1st February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

The starting material for convenient preparation of deuterated hydrogen peroxide ($$\mathrm{D_{2}O_{2}}$$) in :

A
$$\mathrm{BaO_{2}}$$
B
2-ethylanthraquinol
C
$$\mathrm{BaO}$$
D
$$\mathrm{K_{2}S_{2}O_{8}}$$
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