Chemistry questions
29404 published questions with worked solutions.
- Which of the following molecules/ions does not contain unpaired electrons?
- Among the following mixtures, dipole-dipole as the major interaction, is present in
- A metal, M forms chlorides in its +2 and +4 oxidation states. Which of the following statements about these chlorides is correct?
- In which of the following molecules/ions are all the bonds not equal?
- Phosphorus pentachloride dissociates as follows, in a closed reaction vessel, PCl_5(g) PCl_3(g) + Cl_2(g) If total pressure at...
- The standard enthalpy of formation ( _fH^ ) at 298 K for methane, CH_4(g), is −74.8 kJ mol^ -1 . The additional information...
- An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If T_i is the initial temperature and...
- The enthalpy changes for the following processes are listed below: Cl_2(g) = 2Cl(g), 242.3 kJ mol^ -1 ; I_2(g) = 2I(g), 151.0 kJ...
- The equilibrium constant for the reaction SO_3(g) SO_2(g) + 12O_2(g) is K_c = 4.9 10^ -2 . The value of K_c for the reaction...
- The ionic mobility of alkali metal ions in aqueous solution is maximum forNot in JEE Main or NEET syllabus
- The increasing order of the rate of HCN addition to compounds A – D is (A) HCHO (B) CH_3COCH_3 (C) PhCOCH_3 (D) PhCOPh
- The increasing order of stability of the following free radicals is
- Increasing order of stability among the three main conformations (i.e. Eclipse, Anti, Gauche) of 2-fluoroethanol is
- Total volume of atoms present in a face-centre cubic unit cell of a metal is ( r is atomic radius)Not in JEE Main or NEET syllabus
- 18 g of glucose (C_6H_ 12 O_6) is added to 178.2 g of water. The vapour pressure of water for this aqueous solution at 100^ is
- The molar conductivities ^ _ NaOAc and ^ _ HCl at infinite dilution in water at 25°C are 91.0 and 426.2 S cm²/mol respectively....
- Given the data at 25°C, Ag + I^- AgI + e^-; E^ = 0.152 V Ag Ag^+ + e^-; E^ = -0.800 V What is the value of K_ sp for AgI ? (2.303...
- Resistance of a conductivity cell filled with a solution of an electrolyte of concentration 0.1M is 100Ω. The conductivity of...
- A reaction was found to be second order with respect to the concentration of carbon monoxide. If the concentration of carbon...
- Rate of a reaction can be expressed by Arrhenius equation as: k = Ae^ -E/RT In this equation, E represents