Practice questions
88551 published questions with worked solutions.
- If a rubber ball falls from a height h and rebounds upto the height of h/2. The percentage loss of total energy of the initial...
- To measure the internal resistance of a battery, potentiometer is used. For R = 10 Ω, the balance point is observed at ℓ = 500 cm...
- The co-ordinates of a particle moving in x-y plane are given by: x = 2 + 4t, y = 3t + 8t^2. The motion of the particle is:
- In an ac circuit, the instantaneous current is zero, when the instantaneous voltage is maximum. In this case, the source may be...
- An infinite plane sheet of charge having uniform surface charge density +σ_s C/m^2 is placed on x-y plane. Another infinitely...
- A alternating current at any instant is given by i = [6 + 56 (100 t + 3 ) ] A. The rms value of the current is ________ A.
- A soap bubble is blown to a diameter of 7 cm. 36960 erg of work is done in blowing it further. If surface tension of soap...
- Two wavelengths λ_1 and λ_2 are used in Young's double slit experiment λ_1 = 450 nm and λ_2 = 650 nm. The minimum order of fringe...
- An elastic spring under tension of 3 N has a length a. Its length is b under tension 2 N. For its length (3a – 2b), the value of...
- Two forces F_1 and F_2 are acting on a body. One force has magnitude thrice that of the other force and the resultant of the two...
- A solid sphere and a hollow cylinder roll up without slipping on same inclined plane with same initial speed v. The sphere and...
- What pressure (bar) of H_2 would be required to make emf of hydrogen electrode zero in pure water at 25ºC?
- The correct sequence of ligands in the order of decreasing field strength is:
- Match List-I with List-II: List-I (Mechanism steps): (A) Aniline: the lone pair on –NH_2 delocalises into the benzene ring, shown...
- What will be the decreasing order of basic strength of the following conjugate bases? ^-OH, R O, CH_3CO O, Cl
- In the precipitation of the iron group (III) in qualitative analysis, ammonium chloride is added before adding ammonium hydroxide...
- One of the commonly used electrode is calomel electrode. Under which of the following categories calomel electrode comes?
- Number of complexes from the following with even number of unpaired "d" electrons is ____. [V(H_2O)_6]^ 3+ , [Cr(H_2O)_6]^ 2+ ,...
- Which one of the following molecules has maximum dipole moment?
- Number of molecules/ions from the following in which the central atom is involved in sp^3 hybridization is ________. NO_3^-,...