Practice questions
88551 published questions with worked solutions.
- The type of hybridisation and number of lone pair(s) of electrons of Xe in XeOF_4, respectively, are:
- Which of the following is not an example of heterogenous catalytic reaction?Not in JEE Main or NEET syllabus
- The total number of isotopes of hydrogen and number of radioactive isotopes among them, respectively, are:Not in JEE Main or NEET syllabus
- A process has ΔH = 200 J mol^ -1 and ΔS = 40 JK^ -1 mol^ -1 . Out of the values given below, choose the minimum temperature above...
- 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^-...
- In a class of 140 students numbered 1 to 140, all even numbered students opted Mathematics course, those whose number is...
- Let a = 2 i + _1 j + 3 k, b = 4 i + (3 - _2) j + 6 k, and c = 3 i + 6 j + ( _3 - 1) k be three vectors such that b = 2 a and a is...
- Consider the statement: "P(n): n^2 - n + 41 is prime". Then which one of the following is true?Not in JEE syllabus