1
JEE Main 2023 (Online) 6th April Morning Shift
Numerical
+4
-1
Out of Syllabus
Change Language

For the adsorption of hydrogen on platinum, the activation energy is $$30 ~\mathrm{k} ~\mathrm{J} \mathrm{mol}^{-1}$$ and for the adsorption of hydrogen on nickel, the activation energy is $$41.4 ~\mathrm{k} ~\mathrm{J} \mathrm{mol}^{-1}$$. The logarithm of the ratio of the rates of chemisorption on equal areas of the metals at $$300 \mathrm{~K}$$ is __________ (Nearest integer)

Given: $$\ln 10=2.3$$

$$\mathrm{R}=8.3 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}$$

Your input ____
2
JEE Main 2023 (Online) 6th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Let $$A = \{ x \in R:[x + 3] + [x + 4] \le 3\} ,$$

$$B = \left\{ {x \in R:{3^x}{{\left( {\sum\limits_{r = 1}^\infty {{3 \over {{{10}^r}}}} } \right)}^{x - 3}} < {3^{ - 3x}}} \right\},$$ where [t] denotes greatest integer function. Then,

A
$$B \subset C,A \ne B$$
B
$$A \subset B,A \ne B$$
C
$$A = B$$
D
$$A \cap B = \phi $$
3
JEE Main 2023 (Online) 6th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

The sum of the first $$20$$ terms of the series $$5+11+19+29+41+\ldots$$ is :

A
3420
B
3450
C
3250
D
3520
4
JEE Main 2023 (Online) 6th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

A pair of dice is thrown 5 times. For each throw, a total of 5 is considered a success. If the probability of at least 4 successes is $$\frac{k}{3^{11}}$$, then $$k$$ is equal to :

A
82
B
164
C
123
D
75
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