Chemistry questions
29404 published questions with worked solutions.
- CORRECT representation of the heat supplied at a constant pressure and constant volume in gaseous reaction is _____ [MH CET 2010]
- For the reaction N_2 + 3H_2 2NH_3 ; H = _____ [Roorkee 2000, CBSE PMT 1991, CBSE PMT 2002]
- The difference between heat of reaction at constant pressure and constant volume for the reaction, C_ (s) + 12O_ 2(g) CO_ (g) is...
- In a reaction, CO_ 2(g) + H_ 2(g) CO_ (g) + H_2O_ (g) ; H = +2.8 kJ at constant pressure. The heat of reaction at constant volume...
- The values of heat of formation of SO_2 and SO_3 are -298.2 kJ and -98.2 kJ. The heat of reaction of the following reaction will...
- Thermochemical reactions C_ (graphite) + 12O_ 2(g) CO_ (g) ; H = -110.5 kJ ....(i) CO_ (g) + 12O_ 2(g) CO_ 2(g) ; H = -283.2 kJ...
- H_ 2(g) + 12O_ 2(g) H_2O_ (l) ; H = -68 kcal. Amount of heat liberated when 7.2 g of water is decomposed is _____ [MH CET 2002]
- Enthalpy of formation of two compounds x and y are -84 kJ and -156 kJ respectively. Which of the following statement is CORRECT?...
- The CORRECT equation for heat of formation of CO is _____ [MH CET 2003]
- If heat of combustion of methane is -800 kJ, then heat of combustion of 4 10^ -4 kg of methane is _____ [MH CET 2009]
- Heat of formation of SO_2 is -298 kJ. What is the heat of formation of 4 gms of SO_2 ?
- Heat of hydrogenation of ethylene is X and that of acetylene is Y, change in enthalpy when acetylene is hydrogenated to ethylene...
- Enthalpy of combustion of C_6H_ 6(l) at 298 K to yield CO_ 2(g) and H_2O_ (l) is H = -781.1 kcal. Calculate [MH CET 2013]
- The amount of heat liberated in the reaction 2PCl_5 2P + 5Cl_2 is -340 kJ. The heat of formation of PCl_5 is _____
- Energy required to dissociate 4 g of gaseous hydrogen into free gaseous atoms is 208 kcal at 25 ^ . The bond energy of H - H bond...
- Which among the following thermochemical equations represents formation of sodium chloride? [MH CET 2010]
- Assuming enthalpy of combustion of hydrogen at 273 K is -286 kJ and enthalpy of fusion of ice at the same temperature to be +6.0...
- For which one of the following equations is _ react H^ equal to _fH^ for the product? [CBSE PMT 2003]
- The H - H bond energy is 430 kJ mol^ -1 and Cl - Cl bond energy is 240 kJ mol^ -1 . H for HCl is -90 kJ. The H - Cl bond energy...
- When 4 g of iron is burnt to ferric oxide at constant pressure, 29.28 kJ of heat is evolved. What is the enthalpy of formation of...