Chemistry questions
29404 published questions with worked solutions.
- Given below are two statements: Statement I : In froth floatation method a rotating paddle agitates the mixture to drive air out...Not in JEE Main or NEET syllabus
- A first order reaction has the rate constant, k = 4.6 10^ -3 s^ -1 . The number of correct statement/s from the following...
- The number of incorrect statement/s from the following is/are__________ A. Water vapours are adsorbed by anhydrous calcium...Not in JEE Main or NEET syllabus
- Number of hydrogen atoms per molecule of a hydrocarbon A having 85.8% carbon is _________ (Given: Molar mass of A = 84 g mol^ -1 )
- The number of given orbitals which have electron density along the axis is _________ p_x, p_y, p_z, d_ xy , d_ yz , d_ xz , d_...
- The number of pairs of the solutions having the same value of the osmotic pressure from the following is _________ (Assume 100%...
- 28.0 L of CO_2 is produced on complete combustion of 16.8 L gaseous mixture of ethene and methane at 25°C and 1 atm. Heat evolved...
- Pt(s)|H_2(g)(1bar)|H^+(aq)(1M)||M^ 3+ (aq),M^+(aq)|Pt(s) The E_ cell for the given cell is 0.1115 V at 298 K when [M^+(aq)] [M^...
- Reaction of thionyl chloride with white phosphorus forms a compound [A], which on hydrolysis gives [B], a dibasic acid. [A] and...
- '25 volume' hydrogen peroxide means
- The radius of the 2^ nd orbit of Li^ 2+ is x. The expected radius of the 3^ rd orbit of Be^ 3+ is
- Which one of the following reactions does not occur during extraction of copper?Not in JEE Main or NEET syllabus
- Match items of Row I with those of Row II. [Fischer/Haworth structures A,B,C,D] Row II: (i) -D-(–)-Fructofuranose (ii)...
- Which of the following statements is incorrect for antibiotics?Not in JEE Main or NEET syllabus
- Match List-I with List-II List-I (Elements): A. K B. Ca C. Sr D. Ba List-II (Colour imparted to the flame): I. Brick Red II....
- Which of the following conformations will be the most stable? [Newman projections of butane]
- The correct order in aqueous medium of basic strength in case of methyl substituted amines is:
- Match List-I with List-II List-I (Cations): A. Pb^ 2+ , Cu^ 2+ B. Al^ 3+ , Fe^ 3+ C. Co^ 2+ , Ni^ 2+ D. Ba^ 2+ , Ca^ 2+ List-II...
- Inert gases have positive electron gain enthalpy. Its correct order is
- The osmotic pressure of solutions of PVC in cyclohexanone at 300 K are plotted on the graph. The molar mass of PVC is _________g...