List of top Questions asked in JEE Main- 2023

Let $\alpha$ be the area of the larger region bounded by the curve $y^2=8 x$ and the lines $y=x$ and $x=2$, which lies in the first quadrant Then the value of $3 \alpha$ is equal to _____

The number of rational terms in the expansion of (3^3/4+ 5^3/2)60?

Consider two sets A and B. Set A has 5 elements whose mean & variance are 5 and 8 respectively. Set B has also 5 elements whose mean & variance are 12 & 20 respectively. A new set C is formed by subtracting 3 from each element of set A and by adding 2 to each element of set B. The sum of mean & variance of the set C is

The number of sp² hybridized carbon atoms in the following peptide is Ala – Phe – Gly – Ala – Phe - Ley

For the 1st order reactions, the ratio of t_50% to t_87.5% will be:

The mean and variance of 7 observations are 8 and 16 respectively If one observation 14 is omitted and $a$ and $b$ are respectively mean and variance of remaining 6 observation, then $a+3 b-5$ is equal to ______

The mean of coefficients of $x, x^2, ....., x^7$ in the binomial expansion of $(2 + x)^9$ is?

Let $S=\{1,2,3,4,5,6\}$ Then the number of one-one functions $f: S \rightarrow P ( S )$, where $P ( S )$ denote the power set of $S$, such that $f(m) \subset f(m)$ where $n < m$ is _______

Equation of progressive wave is $y = A\text{ sin}(160t-0.5x)$. Let the speed of the wave be 10x then, find x.

Electric field due to a dipole at a equatorial point depends upon r-n . Value of n is

Determine the amount of urea (NH₂CONH₂) to be added in 1000 g of water to decrease its vapour presssure by 25%.
Given: Molar mass of N. C. O and H are 14. 12. 16 and 1 2 mol^-1 respectively.

Correct order of first ionization energy of Li, Be, C, B, N, O, F

Choose the correct option.