List of top Questions asked in JEE Main- 2023

If the height of the tower used for LOS communication is increased by 21%, the percentage change in range is?

Increasing order of stability of the resonance structures is: Choose the correct answer from the options given below:

Increasing order of stability of the resonance structures is: Choose the correct answer from the options given below:

If half life for a radioactive decay reaction is T. Find the time after which $\frac{7}{8}th$ of initial mass decays

If [x+6]+[x+3] ≤ 7 and let call its solution as set A and set B is the solution of inequality 3^5x-8 < 3^-3x.

The height of liquid column raised in a capillary tube of certain radius when dipped in liquid A vertically is, $5 cm$ If the tube is dipped in a similar manner in another liquid $B$ of surface tension and density double the values of liquid $A$, the height of liquid column raised in liquid $B$ would be ______$m$

The output waveform of the given logical circuit for the following inputs $A$ and $B$ as shown below, is :

The pressure $( P )$ and temperature $( T )$ relationship of an ideal gas obeys the equation $PT ^2=$ constant The volume expansion coefficient of the gas will be :

The $Cl - Co - Cl$ bond angle values in a fac- $\left[ Co \left( NH _3\right)_3 Cl _3\right]$ complex is/are:

Given below are two statements, one is labelled as Assertion $A$ and the other is labelled as Reason R
Assertion A : Butylated hydroxy anisole when added to butter increases its shelf life
Reason R : Butylated hydroxy anisole is more reactive towards oxygen than food
In the light of the above statements,choose the most appropriate answer from the options given below

Least stable Hydride is?

Which one of the following reactions does not occur during extraction of copper?

A source of sound is moving away from a stationary observer with constant velocity 40 m/s. Find frequency heard by observer, if original frequency of source is 400 Hz and speed of sound in air is 360 m/s

In AM modulation, a signal is modulated on a carrier wave such that maximum and minimum amplitude are found to be $6 V$ and $2 V$ respectively The modulation index is

Two projectiles A and B are projected from the same point on ground with same speed of projection as shown. Find the ratio of maximum height attained by A to that of B.

For micelle formation, which of the following statements are correct?
(A) Micelle formation is an exothermic process
(B) Micelle formation is an endothermic process
(C) The entropy change is positive
(D) The entropy change is negative

Match the columns Column I Column II (a) Biodegradable (p) polyacrylonitrie (b) Synthetic (q) PHBV (c) Natural (r) dacron (d) Polyester (s) Rubber

A wire of length 2 m, radius of cross-section 20 mm and Young's Modulus 2×10¹¹ N/m is subjected to a force of 62.8 kN.The change in length of the wire is p×10^–5 (in m). Find P.

If $x+y+z=17$ and x, y, z are non-negative integers, then find the number of integral solutions is

($\frac{2x^3-1}{3x^8}$)⁵$\rightarrow$coefficient of x⁴

Mean of first 15 numbers is 12 and variance is 14. Mean of next 15 numbers is 14 and variance is a. If variance of all 30 numbers is 13, then a is equal to

Given below are two statements, one is labelled as Statement-1 and the other is labelled as Statement-2: Statement-1: Sulphides are converted into oxide first. Statement-2: Because oxides can be reduced easily. In the light of the above statements, choose the correct answer from the options given below

A sphere of density ρ & mass m is moving down with constant velocity in viscous liquid of density ρ₀. Find out viscous force on sphere

If the height of the tower used for L.D.S is increased by 21% then percentage change in range is?