Chemistry questions
29404 published questions with worked solutions.
- Match List-I with List-II. List-I: (a) Valium (b) Morphine (c) Norethindrone (d) Vitamin B_ 12 List-II: (i) Antifertility drug...Not in JEE Main or NEET syllabus
- The correct shape and I–I–I bond angles respectively in I_3^- ion are :-
- Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Hydrogen is...Not in JEE Main or NEET syllabus
- The total number of amines among the following which can be synthesized by Gabriel synthesis is _______. (1) (CH_3)_2CH-CH_2-NH_2...
- -sulphur and -sulphur are diamagnetic. S_2-form is paramagnetic. Among the following allotropic forms of sulphur, the number of...
- The formula of a gaseous hydrocarbon which requires 6 times of its own volume of O_2 for complete oxidation and produces 4 times...
- The volume occupied by 4.75 g of acetylene at 50°C and 740 mmHg pressure is _____ L. (Rounded off to the nearest integer) [Given...
- C_6H_6 freezes at 5.5°C. The temperature at which a solution 10 g of C_4H_ 10 in 200 g of C_6H_6 freeze is ________°C. (The molal...
- The magnitude of the change in oxidising power of the MnO_4^-/Mn^ 2+ couple is x 10^ -4 V, if the H^+ concentration is decreased...
- The solubility product of PbI_2 is 8.0 10^ -9 . The solubility of lead iodide in 0.1 molar solution of lead nitrate is x 10^ -6...
- Sucrose hydrolyses in acid solution into glucose and fructose following first order rate law with a half-life of 3.33 h at 25°C....
- 1.86 g of aniline completely reacts to form acetanilide. 10% of the product is lost during purification. Amount of acetanilide...
- Assuming ideal behaviour, the magnitude of log K for the following reaction at 25°C is x 10^ -1 . The value of x is ____....
- Consider the elements Mg, Al, S, P and Si, the correct increasing order of their first ionization enthalpy is :
- Which of the following ore is concentrated using group 1 cyanide salt ?Not in JEE Main or NEET syllabus
- Al_2O_3 was leached with alkali to get X. The solution of X on passing of gas Y, forms Z. X,Y and Z respectively are :Not in JEE Main or NEET syllabus
- Which of the following are isostructural pairs ? A. SO_4^ 2- and CrO_4^ 2- B. SiCl_4 and TiCl_4 C. NH_3 and NO_3^- D. BCl_3 and...
- (A) HOCl+H_2O_2 H_3O^++Cl^-+O_2 (B) I_2+H_2O_2+2OH^- 2I^-+2H_2O+O_2^- Choose the correct option.
- Which of the following reagent is used for the following reaction ? CH_3CH_2CH_3 ? CH_3CH_2CHO
- Out of the following, which type of interaction is responsible for the stabilisation of -helix structure of proteins ?