Chemistry questions
29404 published questions with worked solutions.
- The type of pollution that gets increased during the day time and in the presence of O_3 is :Not in JEE Main or NEET syllabus
- Assertion A : Enol form of acetone [CH_3COCH_3] exists in < 0.1% quantity. However, the enol form of acetyl acetone...
- The process that involves the removal of sulphur from the ores is :Not in JEE Main or NEET syllabus
- Match List-I with List-II : List-I: (a) Hypophosphorous acid (b) Orthophosphoric acid (c) Hypophosphoric acid (d)...
- Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : The H–O–H...
- In chromatography technique, the purification of compound is independent of :
- A group 15 element, which is a metal and forms a hydride with strongest reducing power among group 15 hydrides. The element is :
- For the reaction A(g) B(g) at 495 K, _rG^0 = –9.478 kJ mol ^ -1 . If we start the reaction in a closed container at 495 K with 22...
- 2MnO_4^-+bC_2O_4^ 2- +cH^+ xMn^ 2+ +yCO_2+zH_2O If the above equation is balanced with integer coefficients, the value of c is...
- AB_2 is 10% dissociated in water to A^ 2+ and B^-. The boiling point of a 10.0 molal aqueous solution of AB_2 is ________°C....
- The equivalents of ethylene diamine required to replace the neutral ligands from the coordination sphere of the trans-complex of...
- A 6.50 molal solution of KOH (aq.) has a density of 1.89 g cm ^ -3 . The molarity of the solution is ________ mol dm ^ -3 ....
- Two salts A_2X and MX have the same value of solubility product of 4.0 10^ -12 . The ratio of their molar solubilities i.e....
- A certain element crystallises in a bcc lattice of unit cell edge length 27 Å. If the same element under the same conditions...Not in JEE Main or NEET syllabus
- The decomposition of formic acid on gold surface follows first order kinetics. If the rate constant at 300 K is 1.0 10^ -3 s^ -1...
- Fructose is an example of :-
- Match List-I with List-II : List-I: (a) Haematite (b) Bauxite (c) Magnetite (d) Malachite List-II: (i) Al_2O_3.xH_2O (ii) Fe_2O_3...Not in JEE Main or NEET syllabus
- The correct pair(s) of the ambident nucleophiles is (are) : (A) AgCN/KCN (B) RCOOAg/RCOOK (C) AgNO_2/KNO_2 (D) AgI/KI
- The set that represents the pair of neutral oxides of nitrogen is :
- Match List-I with List-II : List-I: (a) [Co(NH_3)_6][Cr(CN)_6] (b) [Co(NH_3)_3(NO_2)_3] (c) [Cr(H_2O)_6]Cl_3 (d)...