Chemistry questions
29404 published questions with worked solutions.
- The number of possible optical isomers for the complexes MA_2B_2 with sp^3 and dsp^2 hybridized metal atom, respectively, is :...
- The flocculation value of HCl for arsenic sulphide sol. is 30 m mol L ^ -1 . If H_2SO_4 is used for the flocculation of arsenic...Not in JEE Main or NEET syllabus
- 3 g of acetic acid is added to 250 mL of 0.1 M HCl and the solution made up to 500 mL. To 20 mL of this solution 1 2 mL of 5 M...
- The standard heat of formation ( _f H^0_ 298 ) of ethane (in kJ/mol), if the heat of combustion of ethane, hydrogen and graphite...
- The number of sp^2 hybridised carbons present in "Aspartame" is ____.
- Amongst the following, the form of water with the lowest ionic conductance at 298 K is :
- The correct order of the spin-only magnetic moments of the following complexes is : (I) [ Cr(H_2O)_6 ] Br_2 (II) Na_4[Fe(CN)_6]...
- Which polymer has 'chiral' monomer(s) ?
- The first and second ionisation enthalpies of a metal are 496 and 4560 kJ mol ^ -1 , respectively. How many moles of HCl and...
- Among the statements (a) – (d), the correct ones are : (a) Lithium has the highest hydration enthalpy among the alkali metals....Not in JEE Main or NEET syllabus
- The solubility product of Cr(OH)_3 at 298 K is 6.0 10^ -31 . The concentration of hydroxide ions in a saturated solution of...
- The number of sp^2 hybrid orbitals in a molecule of benzene is -
- A, B and C are three biomolecules. The results of the tests performed on them are given below : | | Molisch's Test | Barfoed Test...
- Which of the following has the shortest C–Cl bond ?
- The reaction of H_3N_3B_3Cl_3 (A) with LiBH_4 in tetrahydrofuran gives inorganic benzene (B). Further, the reaction of (A) with...
- The isomer (s) of [ Co(NH_3)_4Cl_2 ] that has/have a Cl–Co–Cl angle of 90º, is/are :
- The sum of the total number of bonds between chromium and oxygen atoms in chromate and dichromate ions is _______
- A sample of milk splits after 60 min. at 300 K and after 40 min. at 400 K when the population of lactobacillus acidophilus in it...
- Consider the following reactions A [ (ii) H _3 O ^+] (i) CH _3 MgBr B [573 K] Cu 2-methyl-2-butene The mass percentage of carbon...
- 10.30 mg of O_2 is dissolved into a liter of sea water of density 1.03 g/mL. The concentration of O_2 in ppm is ______.