Chemistry questions
29404 published questions with worked solutions.
- Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct?
- Which of the following statement is true with respect to H_2O, NH_3 and CH_4? A. The central atoms of all the molecules are...
- Given below are two statements : Statement-I : The conversion proceeds well in the less polar medium. CH_3-CH_2-CH_2-CH_2-Cl HO^-...
- 37.8 g N_2O_5 was taken in a 1 L reaction vessel and allowed to undergo the following reaction at 500 K 2N_2O_5(g) 2N_2O_4(g) +...
- Standard entropies of X_2, Y_2 and XY_5 are 70, 50 and 110 J K⁻¹ mol⁻¹ respectively. The temperature in Kelvin at which the...
- Xg of benzoic acid on reaction with aq. NaHCO_3 release CO_2 that occupied 11.2 L volume at STP. X is _____ g.
- Among the following cations, the number of cations which will give characteristic precipitate in their identification tests with...
- Consider the following reaction occurring in the blast furnace. Fe_3O_4(s) + 4CO(g) 3Fe(l) + 4CO_2(g) 'x' kg of iron is produced...
- Based on the data given below : E^0_ Cr_2O_7^ 2- /Cr^ 3+ = 1.33V, E^0_ Cl_2/Cl^- = 1.36V, E^0_ MnO_4^-/Mn^ 2+ = 1.51V, E^0_ Cr^...
- For hydrogen atom, the orbital/s with lowest energy is/are : (A) 4s (B) 3p_x (C) 3d_ x^2-y^2 (D) 3d_ z^2 (E) 4p_z Choose the...
- Which of the following mixing of 1M base and 1M acid leads to the largest increase in temperature?
- The elemental composition of a compound is 54.2%, C, 9.2% H and 36.6% O. If the molar mass of the compound is 132 g mol^ -1 , the...
- When Ethane-1,2-diamine is added progressively to an aqueous solution of Nickel (II) chloride, the sequence of colour change...
- The conditions and consequence that favours the t_ 2g ^3, e_g^1 configuration in a metal complex are :
- Identify correct statement/s : (A) —OCH3 and —NHCOCH3 are activating group (B) —CN and —OH are meta directing group (C) —CN and...
- Given below are two statements : Statement (I) : The first ionization energy of Pb is greater than that of Sn Statement(II) : The...
- S(g) + 3 2 O_2(g) SO_3(g) + 2x kcal SO_2(g) + 1 2 O_2(g) SO_3(g) + y kcal The heat of formation of SO2(g) is given by :
- The successive 5 ionisation energies of an element are 800, 2427, 3658, 25024 and 32824 kJ/mol, respectively. By using the above...
- The observed and normal masses of compound MX2 are 65.6 and 164 respectively. The percent degree of ionisation of MX2 is...
- The possible number of stereoisomers for 5-phenylpent-4-en-2-ol is __________.