Practice questions
88551 published questions with worked solutions.
- A brass wire of length 2 m and radius 1 mm at 27^ C is held taut between two rigid supports. Initially it was cooled to a...
- The electrostatic potential in a charged spherical region of radius r varies as V = ar^3+b, where a and b are constants. The...
- An unpolarised light is incident at an interface of two dielectric media having refractive indices of 2 (incident medium) and 2 3...
- A boy thrown a ball into air at 45º from the horizontal to land it on a roof of a building of height H. If the ball attains...
- There are three co-centric conducting spherical shells A, B and C of radii a, b and c respectively. The potential of the spheres...
- Three masses 200 kg, 300 kg and 400 kg are placed at the vertices of an equilateral triangle with sides 20 m. They are rearranged...
- A short bar magnet placed with its axis at 30º with an external field of 800 Gauss, experiences a torque of 0.016 N.m. The work...Not in JEE Advanced syllabus
- A gas of certain mass filled in a closed cylinder at a pressure of 3.23 kPa has temperature 50ºC. The gas is now heated to double...
- A voltage regulating circuit consisting of Zener diode, having break-down voltage of 10 V and maximum power dissipation of 0.4 W,...
- Sixty four rain drops of radius 1 mm each falling down with a terminal velocity of 10 cm/s coalesce to form a bigger drop. The...
- Given below are two statements : Statement-I Hybridisation, shape and spin only magnetic moment of K_3[Co(CO_3)_3] is sp^3d^2,...
- Given below are statements about some molecules/ions. Identify the CORRECT statements. A. The dipole moment value of NF_3 is...
- A solution is prepared by dissolving 0.3 g of a nonvolatile non-electrolyte solute 'A' of molar mass 60 g mol ^ -1 and 0.9 g of a...
- Among the following, the CORRECT combinations are : A. IF_3 T-shaped (sp^3d) B. IF_5 Square pyramidal (sp^3d^2) C. IF_7...
- Given below are two statements Statements-I : The number of paramagnetic species among [CoF_6]^ 3- , [TiF_6]^ 3- , V_2O_5 and...
- Consider three metal chlorides x, y and z, where x is water soluble at room temperature, y is sparingly soluble in water at room...
- 'W' g of a non-volatile electrolyte solid solute of molar mass 'M' gmol ^ -1 when dissolved in 100 mL water, decreases vapour...
- At 27^ C in presence of a catalyst, activation energy of a reaction is lowered by 10 kJ mol ^ -1 . The logarithm ratio of k(...
- Arrange the following carbanions in the decreasing order of stability I. p -Br- C_6H_4 - C H_2 II. C_6H_5 - C H_2 III. p - CH_3O...
- Given below are two statements : Statement I: K>Mg>Al>B is the correct order in terms of metallic character. Statement II :...