Practice questions
88551 published questions with worked solutions.
- A galvanometer with its coil resistance 25 Ω requires a current of 1 mA for its full deflection. In order to construct an ammeter...
- Two sitar strings, A and B, playing the note 'Dha' are slightly out of tune and produce beats of frequency 5 Hz. The tension of...
- Suppose that the angular velocity of rotation of earth is increased. Then, as a consequence.
- Two identical conducting spheres, A and B, carry equal charge. They are separated by a distance much larger than their diameter,...
- A ray of light is incident at an angle of 60° on one face of a prism of angle 30°. The emergent ray of light makes an angle of...
- A carrier wave of peak voltage 14 V is used for transmitting a message signal. The peak voltage of modulating signal given to...Not in JEE or NEET syllabus
- A plane electromagnetic wave of wavelength has an intensity I. It is propagating along the positive Y-direction. The allowed...
- When XO_2 is fused with an alkali metal hydroxide in presence of an oxidizing agent such as KNO_3, a dark green product is formed...
- Among the oxides of nitrogen : N_2O_3, N_2O_4 and N_2O_5; the molecule(s) having nitrogen-nitrogen bond is/are -
- In Wilkinson's catalyst, the hybridization of central metal ion and its shape are respectively -
- At 320 K, a gas A_2 is 20 % dissociated to A(g). The standard free energy change at 320 K and 1 atm in J mol^ -1 is approximately...
- Which of the following complexes will show geometrical isomerism ?
- When 9.65 ampere current was passed for 1.0 hour into nitrobenzene in acidic medium, the amount of p-amino-phenol produced is ….....
- An unknown chlorohydrocarbon has 3.55 % of chlorine. If each molecule of the hydrocarbon has one chlorine atom only, chlorine...
- The mass of non-volatile, non-electrolyte solute (molar mass = 50 g mol^ -1 ) needed to be dissolved in 114 g octane to reduce...
- Assuming ideal gas behaviour, the ratio of density of ammonia to that of hydrogen chloride at same temperature and pressure is :...
- The gas phase reaction 2NO_2(g) → N_2O_4(g) is an exothermic reaction. The decomposition of N_2O_4, in equilibrium mixture of...
- Which one of the following is not a property of physical adsorption ?Not in JEE Main or NEET syllabus
- A group 13 element 'X' reacts with chlorine gas to produce a compound XCl_3. XCl_3 is electron deficient and easily reacts with...
- If 50 % of a reaction occurs in 100 seconds and 75 % of the reaction occurs in 200 seconds, the order of this reaction is -