Chemistry questions
29404 published questions with worked solutions.
- 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 -
- Which of the following compounds will most readily be dehydrated to give alkene under acidic condition ?
- The lanthanide ion that would show colour is:
- Given that E^ _ O_2/H_2O = +1.23 V; E^ _ S_2O_8^ 2- /SO_4^ 2- = 2.05 V; E^ _ Br_2/Br^- = +1.09 V; E^ _ Au^ 3+ /Au = +1.4 V. The...
- The size of the iso-electronic species Cl^-, Ar and Ca^ 2+ is affected by:
- The correct order of hydration enthalpies of alkali metal ions is:
- Diborane (B_2H_6) reacts independently with O_2 and H_2O to produce, respectively:
- The quantum numbers of four electrons are given below: I. n = 4, l = 2, m_l = −2, m_s = - 12 II. n = 3, l = 2, m_l = 1, m_s = +...
- In order to oxidise a mixture of one mole of each of FeC_2O_4, Fe_2(C_2O_4)_3, FeSO_4 and Fe_2(SO_4)_3 in acidic medium, the...
- Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes...
- The vapour pressures of pure liquids A and B are 400 and 600 mmHg, respectively at 298 K. On mixing the two liquids, the sum of...