Chemistry questions
29404 published questions with worked solutions.
- A mixture of 100 m mol of Ca(OH)_2 and 2 g of sodium sulphate was dissolved in water and the volume was made up to 100 mL. The...
- Hall-Héroult's process is given by:Not in JEE Main or NEET syllabus
- The electronegativity of aluminium is similar to:
- Which primitive unit cell has unequal edge lengths (a ≠ b ≠ c) and all axial angles different from 90º?Not in JEE Main or NEET syllabus
- The values of K_p/K_c for the following reactions at 300 K are, respectively: (At 300 K, RT = 24.62 dm^3 atm mol^ -1 ) N_2(g) +...
- If dichloromethane (DCM) and water (H_2O) are used for differential extraction, which one of the following statements is correct?
- Two pi and half sigma bonds are present in:
- Wilkinson catalyst is: (Et = C_2H_5)
- The chemical nature of hydrogen peroxide is:
- The effect of lanthanoid contraction in the lanthanoid series of elements by and large means:
- Liquids A and B form an ideal solution in the entire composition range. At 350 K, the vapor pressures of pure A and pure B are 7...
- The total number of isomers for a square planar complex [M(F)(Cl)(SCN)(NO_2)] is:
- Consider the following reduction processes: Zn^ 2+ + 2e^- → Zn(s); E° = −0.76 V Ca^ 2+ + 2e^- → Ca(s); E° = −2.87 V Mg^ 2+ + 2e^-...
- Among the following, the INCORRECT statement about colloids is:Not in JEE Main or NEET syllabus
- An 'Assertion' and a 'Reason' are given below. Choose the correct answer from the following options: Assertion (A): Vinyl halides...
- Among the following, the energy of 2s orbital is lowest in:
- The decreasing order of electrical conductivity of the following aqueous solutions is: 0.1 M Formic acid (A), 0.1 M Acetic acid...
- The C–C bond length is maximum in:
- 25 g of an unknown hydrocarbon upon burning produces 88 g of CO_2 and 9 g of H_2O. This unknown hydrocarbon contains:
- The coordination numbers of Co and Al in [Co(Cl)(en)_2]Cl and K_3[Al(C_2O_4)_3], respectively, are: (en = ethane-1,2-diamine)