19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
If one monoatomic gas is expanded adiabatically from 2L to 10L at 1 atm external pressure then the value of U (in atm L) is
The heat liberated when 1.89g of benzoic acid is burnt in a bomb calorimeter at 25 °C and it increases the temperature of 18.94 kg of water by 0.632 °C. if the specific heat of water at 25 °C is 0.998 cal/g- °C, the v…
On moving top to bottom the negative value of formation …A… for fluoride of alkali metals. Here, A refer to
Which of the following has the lowest value of hydration enthalpy?
For a given value of n (principal quantum number), ionization energy is highest for
Assertion:CH₄, CO₂ has value of Z (compressibility factor) less than one at 0ºC. Reason :Z < 1 is due to the attractive forces dominate among the molecules.
A reaction which is of first order w.r.t. reactant A, has a rate constant 6 min–1. If we start with [A] = 0.5 mol L–1, when would [A] reach the value of 0.05 mol L–1
Hydrolysis of methyl acetate in aqueous solution has been studied by titrating the liberated acetic acid against sodium hydroxide. The concentration of the ester at different times is given below. t/min C/mol L-1 0.85…
Assertion :A catalyst does not influence the value of equilibrium constant. Reason : Catalyst influence the rate of both forward and backward reactions equally.
Assertion : If the equation for a reaction is reversed, the equilibrium constant is inverted and if the equation is multiplied by 2, the equilibrium constant is squared. Reason : The numerical value of equilibrium con…
Given the correct order of initials T or F for the following statements. Use T is statement is true and F if it is false: (I) The order of repulsion between different pair of electrons is LP – LP > LP –BP > BP – BP (I…