JEE Main questions
34495 published questions with worked solutions.
- Using a battery, a 100 pF capacitor is charged to 60 V and then the battery is removed. After that, a second uncharged capacitor...
- A motor operating on 100 V draws a current of 1 A. If the efficiency of the motor is 91.6%, then the loss of power in units of...
- A solid steel ball of diameter 3.6 mm acquired terminal velocity 2.45 10^ -2 m/s while falling under gravity through an oil of...
- Pressure of an ideal gas, contained in a closed vessel, is increased by 0.4% when heated by 1°C. Its initial temperature must be:
- Two cells of emfs 1 V and 2 V and internal resistances 2 and 1 , respectively, are connected in series with an external...
- A physical quantity C is related to four other quantities p, q, r and s as follows C = pq^2 r^3 s . The percentage errors in the...
- Light from a point source in air falls on a spherical glass surface (refractive index, = 1.5 and radius of curvature = 50 cm)....
- The excess pressure inside a soap bubble A in air is half the excess pressure inside another soap bubble B in air. If the volume...
- Given below are two statements: Statement I : Hyperconjugation is not a permanent effect. Statement II : In general, greater the...
- Identify the diamagnetic octahedral complex ions from below : A. [Mn(CN)_6]^ 3- B. [Co(NH_3)_6]^ 3+ C. [Fe(CN)_6]^ 4- D....
- Given below are two statements: Statement I: CrO_3 is a stronger oxidizing agent than MoO_3. Statement II: Cr(VI) is more stable...
- Mass of magnesium required to produce 220 mL of hydrogen gas at STP on reaction with excess of dil. HCl is Given: Molar mass of...
- Compounds that should not be used as primary standards in titrimetric analysis are : A. Na_2Cr_2O_7 B. Oxalic acid C. NaOH D....
- Consider the following statements related to temperature dependence of rate constants. Identify the correct statements. A. The...
- In Dumas' method for estimation of nitrogen 0.4 g of an organic compound gave 60 mL of nitrogen collected at 300 K temperature...
- The standard cell potential (E_ cell ^ ) of a fuel cell based on the oxidation of methanol in air that has been used to power...
- The correct orders among the following are Atomic radius : B < Al < Ga < In < Tl Electronegativity : Al < Ga < In < Tl < B...
- The sequence from the following that would result in giving predominantly 3, 4, 5-Tribromoaniline is
- Fat soluble vitamins are: (A) Vitamin B1 (B) Vitamin C (C) Vitamin E (D) Vitamin B12 (E) Vitamin K Choose the correct answer from...
- 10 mL of 2 M NaOH solution is added to 20 mL of 1 M HCl solution kept in a beaker. Now, 10 mL of this mixture is poured into a...