Practice questions
88551 published questions with worked solutions.
- 5 moles of unknown gas is heated at constant volume from 10°C to 20°C. The molar specific heat of this gas at constant pressure...
- If sunlight is focused on a paper using convex lens, it starts burning the paper in shortest time when the lens is kept at 30 cm...
- The ratio of mass percentage (w/w) of C : H in a hydrocarbon is 12 : 1. It has two carbon atoms. The weight (in g) of CO₂(g)...
- SF₄ is isostructural with: A. BrF₄⁻ B. CH₄ C. IF₄⁺ D. XeF₄ E. XeO₂F₂ Choose the correct answer from the options given below:
- Gas 'A' undergoes change from state 'X' to state 'Y'. In this process, the heat absorbed and work done by the gas is 10 J and 18...
- At 25°C, 20.0 mL of 0.2 M weak monoprotic acid HX is titrated against 0.2 M NaOH. The pH of the solution (a) at the start of the...
- Consider the reaction aX → bY, for which the rate constant at 30°C is 1 × 10⁻³ mol⁻¹ L s⁻¹. Which of the following statements are...
- The correct set that contains all kinds (basic, acidic, amphoteric and neutral) of oxides is:
- Given below are two statements: Statement I: The second ionization enthalpy of B, Al and Ga is in the order of B > Al > Ga....
- Given below are two statements: Statement I: Among Zn, Mn, Sc and Cu, the energy required to remove the third valence electron is...
- Which of the following complexes will show coordination isomerism? A. [Ag(NH₃)₂][Ag(CN)₂] B. [Co(NH₃)₆][Cr(CN)₆] C....
- Complete combustion of X g of an organic compound gave 0.25 g of CO₂ and 0.12 g of H₂O. If the % of carbon is 25% and of hydrogen...
- Given below are two statements: Statement I: In O₂N-C₆H₄-CH⁺-C₆H₄-OCH₃, the carbocation is stabilised by +R effect of −OCH₃...
- The compound (X) on (i) on heating in the presence of anhydrous AlCl₃ and HCl gas gives 2,4-dimethylpentane and (ii)...
- Correct statements regarding alkyl halides (R−X) among the following are: A. Alcohol being less polar solvent as compared to...
- An organic compound "x" where molar ratio of C, O and H are equal, on treatment with 50% KOH under reflux followed by...
- A molecule (X) with structure CH₂=CH−CH₂−O−C(CH₃)=CH₂ (allyl isopropenyl ether) under mild acidic condition is hydrolysed to...
- Among Fe²⁺, Fe³⁺, Cr²⁺ and Zn²⁺, the ion that shows positive borax bead test and with highest ionisation enthalpy is:
- Consider the following two half-cell reactions along with the standard reduction potential given: CO₂ + 6H⁺ + 6e⁻ → CH₃OH + H₂O,...
- Number of paramagnetic ions among the following d- and f-block metal ions is _______. Mn²⁺, Cu²⁺, Zn²⁺, Yb²⁺, Sc³⁺, La³⁺, Gd³⁺,...