Chemistry questions
29404 published questions with worked solutions.
- Molar conductivity of a weak acid HQ of concentration 0.18 M was found to be 1/30 of the molar conductivity of another weak acid...
- Grignard reagent RMgBr(P) reacts with water and forms a gas (Q). One gram of Q occupies 1.4 dm³ at STP. (P) on reaction with dry...
- At T(K), 2 moles of liquid A and 3 moles of liquid B are mixed. The vapour pressure of ideal solution formed is 320 mm Hg. At...
- Consider a weak base 'B' of pK_b = 5.699. 'x' mL of 0.02 M HCl and 'y' mL of 0.02 M weak base 'B' are mixed to make 100 mL of a...
- An organic compound undergoes first order decomposition. The time taken for decomposition to ( 1 8 )^ th and ( 1 10 )^ th of its...
- Given below are two statements: Statement I: The number of species among BF_4^-, SiF_4, XeF_4 and SF_4, that have unequal E-F...
- Regarding the hydrides of group 15 elements EH_3 (E=N,P,As,Sb), select the correct statement from the following: A. The stability...
- Given below are two statements: Statement I: Griss-Ilosvay test is used for the detection of nitrite ion, which involves the use...
- The wave numbers of three spectral lines of H atom are considered. Identify the set of spectral lines belonging to Balmer series....
- Given below are two statements : Statement I : The number of pairs, from the following, in which both the ions are coloured in...
- 500 mL of 1.2 M KI solution is mixed with 500 mL of 0.2M KMnO_4 solution in basic medium. The liberated iodine was titrated with...
- Consider the following redox reaction taking place in acidic medium BH_4^-(aq) + ClO_3^-(aq) H_2BO_3^-(aq) + Cl^-(aq) If the...
- X is the number of geometrical isomers exhibited by [Pt(NH_3)(H_2O)BrCl]. Y is the number of optically inactive isomer(s)...
- Consider the dissociation equilibrium of the following weak acid HA H^+(aq) + A^-(aq). If the pKa of the acid is 4, then the pH...
- Identify the correct statements : The presence of -NO_2 group in benzene ring A. activates the ring towards electrophilic...
- Given below are two statements : Statement I : The increasing order of boiling point of hydrogen halides is HCl<HBr<HI<HF....
- Consider the elements N, P, O, S, Cl and F. The number of valence electrons present in the elements with most and least metallic...
- Observe the following equilibrium in a 1 L flask. A(g) B(g) At T(K), the equilibrium concentrations of A and B are 0.5 M and...
- The plot of _ 10 K vs 1 T gives a straight line. The intercept and slope respectively are (where K is equilibrium constant).
- The reactions which produce alcohol as the product : A. CH_4+O_2 Mo_2O_3, B. 2CH_3CH_3+3O_2 (CH_3COO)_2Mn, C. (CH_3)_3CH KMnO_4...