Practice questions
88551 published questions with worked solutions.
- Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Work done in...
- Two metal spheres of radius R and 3R have same surface charge density . If they are brought in contact and then separated, the...
- Water falls from a height of 200 m into a pool. Calculate the rise in temperature of the water assuming no heat dissipation from...
- A 3m long wire of radius 3 mm shows an extension of 0.1 mm when loaded vertically by a mass of 50 kg in an experiment to...
- A concave-convex lens of refractive index 1.5 and the radii of curvature of its surfaces are 30 cm and 20 cm, respectively. The...
- An electron is released from rest near an infinite non-conducting sheet of uniform charge density '- '. The rate of change of...
- A thin solid disk of 1 kg is rotating along its diameter axis at the speed of 1800 rpm. By applying an external torque of 25 Nm...
- Correct statements for an element with atomic number 9 are A. There can be 5 electrons for which m_s = + 1 2 and 4 electrons for...
- HA(aq) H^+(aq) + A^-(aq) The freezing point depression of a 0.1 m aqueous solution of a monobasic weak acid HA is 0.20°C the...
- Given below are two statements : Statements-I : A homoleptic octahedral complex, formed using monodentate ligands, will not show...
- Which of the following binary mixture does not show the behaviour of minimum boiling azeotropes?
- The correct decreasing order of spin only magnetic moment values (BM) of Cu^+, Cu^ 2+ , Cr^ 2+ and Cr^ 3+ ions is :
- CH(CH_3)_2 attached to H_2N-CH-COOH, at pH = 2 gives A, at pH = 10 gives B. Choose the correct option for structures of A and B,...
- Given below are two statements: Statement I : H_2Se is more acidic than H_2Te Statement II : H_2Se has higher bond enthalpy for...
- In a first order decomposition reaction, the time taken for the decomposition of reactant to one fourth and one eights of its...
- The number of species from the following that are involved in sp^3d^2 hybridization is [Co(NH_3)_6]^ 3+ , SF_6, [CrF_6]^ 3- ,...
- A (i) NaOH (ii) H _3 O ^+ B (i) EtOH (ii) H _2 SO _4, C 'A' shows positive Lassaigne's test for N and its molar mass is 121. 'B'...
- Consider the following half cell reaction Cr_2O_7^ 2- (aq) + 6e^- + 14H^+ (aq) 2Cr^ 3+ (aq) + 7H_2O( ) The reaction was conducted...
- The equilibrium constant for decomposition of H_2O(g) H_2(g) + 1 2 O_2(g) ( G^o = 92.34 kJ mol^ -1 ) is 8.0 × 10^ -3 at 2300 K...
- 20 mL of sodium iodide solution gave 4.74 g silver iodide when treated with excess of silver nitrate solution. The molarity of...