JEE Main questions
34495 published questions with worked solutions.
- One kg of water, at 20ºC, is heated in an electric kettle whose heating element has a mean (temperature averaged) resistance of...
- In an amplitude modulator circuit, the carrier wave is given by, C(t) = 4 sin(20000πt) while modulating signal is given by, m(t)...Not in JEE or NEET syllabus
- The electron in a hydrogen atom first jumps from the third excited state to the second excited state and subsequently to the...
- A system of three polarizers P_1, P_2, P_3 is set up such that the pass axis of P_3 is crossed with respect to that of P_1. The...
- A moving coil galvanometer, having a resistance G, produces full scale deflection when a current I_g flows through it. This...
- A solid sphere, of radius R acquires a terminal velocity v_1 when falling (due to gravity) through a viscous fluid having a...
- Two sources of sound S_1 and S_2 produce sound waves of same frequency 660 Hz. A listener is moving from source S_1 towards S_2...
- A tuning fork of frequency 480 Hz is used in an experiment for measuring speed of sound (v) in air by resonance tube method....
- The ratio of the weights of a body on the Earth's surface to that on the surface of a planet is 9 : 4. The mass of the planet is...
- Two particles are projected from the same point with the same speed u such that they have the same range R, but different maximum...
- Among the following, the INCORRECT statement about colloids is:Not in JEE Main or NEET syllabus
- An 'Assertion' and a 'Reason' are given below. Choose the correct answer from the following options: Assertion (A): Vinyl halides...
- Among the following, the energy of 2s orbital is lowest in:
- The decreasing order of electrical conductivity of the following aqueous solutions is: 0.1 M Formic acid (A), 0.1 M Acetic acid...
- The C–C bond length is maximum in:
- 25 g of an unknown hydrocarbon upon burning produces 88 g of CO_2 and 9 g of H_2O. This unknown hydrocarbon contains:
- The coordination numbers of Co and Al in [Co(Cl)(en)_2]Cl and K_3[Al(C_2O_4)_3], respectively, are: (en = ethane-1,2-diamine)
- The primary pollutant that leads to photochemical smog is:Not in JEE Main or NEET syllabus
- Thermal decomposition of a Mn compound (X) at 513 K results in compound Y, MnO_2 and a gaseous product. MnO_2 reacts with NaCl...
- The pair that has similar atomic radii is: