List of top Questions asked in BITSAT

Consider the reaction: Cl₂(aq) + H₂S(aq) → S(s) + 2H⁺(aq) + 2Cl⁻(aq) The rate equation for this reaction is: rate = k[Cl₂][H₂S] Which of these mechanisms is/are consistent with the rate equation? A. Cl₂ + H₂S → H⁺ + Cl⁻ + Cl⁺ + HS⁻ (slow) Cl⁺ + HS⁻ → H⁺ + Cl⁻ + S (fast) B. H₂S rightleftharpoons H⁺ + HS⁻ (fast equilibrium) Cl₂ + HS⁻ → 2Cl⁻ + H⁺ + S (slow)
An electron has magnetic quantum number ml = -3. What is its principal quantum number?
The average kinetic energy of an ideal gas molecule in SI unit at 25^∘C will be:
At what temperature will the rate of effusion of N₂ be 1.625 times that of SO₂ at 50^∘C?
For a particular reversible reaction at temperature T, Δ H and Δ S were found to be both positive. If Tₑ is the temperature at equilibrium, then the reaction would be spontaneous when:
The degree of dissociation of PCl₅(g) obeying the equilibrium PCl₅ rightleftharpoons PCl₃ + Cl₂ is related to the equilibrium pressure P by:
In a closed system, A(s) rightleftharpoons 2B(g) + 3C(g) if the partial pressure of C is doubled, then the partial pressure of B will be:
The first emission line in the atomic spectrum of hydrogen in the Balmer series appears at:
Fructose on reduction gives a mixture of two alcohols which are related as:
What will happen when D(+)-glucose is treated with methanolic HCl followed by Tollens’ reagent?
The important antioxidant used in food is:
Sometimes, the colour observed in Lassaigne’s test for nitrogen is green. It is because:
Which of the following forms the base of talcum powder?
An aromatic compound has molecular formula C₇H₇Br. Give the possible isomers and the appropriate method to distinguish them.
Which of the following methods gives better yield of p-nitrophenol?
Formation of polyethylene from calcium carbide takes place as follows: CaC₂ + 2H₂O → Ca(OH)₂ + C₂H₂ C₂H₂ + H₂ → C₂H₄ nC₂H₄ → (–CH₂–CH₂–)ₙ The amount of polyethylene obtained from 64.1kg of CaC₂ is:
CH₃Cequiv CCH₃ H₂/Pt A D₂/Pt B. The compounds A and B respectively are:
The normality of 26% (wt/vol) solution of ammonia (density =0.855) is approximately:
1.25 g of a sample of Na₂CO₃ and Na₂SO₄ is dissolved in 250mL solution. 25mL of this solution neutralizes 20mL of 0.1NH₂SO₄. The percentage of Na₂CO₃ in the sample is:
The hypothetical complex chloro-diaamminecobalt(III) chloride can be represented as:
Which of the following compounds has all the four types (1^∘, 2^∘, 3^∘ and 4^∘) of carbon atoms?
Which of the following has two stereoisomers?
The decreasing order of the ionization potential of the following elements is:
Which of the following arrangements does not represent the correct order of the property stated against it?
Knowing that the chemistry of lanthanoids (Ln) is dominated by its +3 oxidation state, which of the following statements is incorrect?