List of practice Questions

In a closed system, A(s) rightleftharpoons 2B(g)+3C(g) if the partial pressure of C is doubled, then partial pressure of B will be:
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, the reaction would be spontaneous when:
Given the following data: l c Reaction & Energy change (kJ)
Li(s) → Li(g) & 161
Li(g) → Li⁺(g) & 520
(1)/(2)F₂(g) → F(g) & 77
F(g) + e⁻ → F⁻(g) & ?
Li⁺(g) + F⁻(g) → LiF(s) & -1047
Li(s) + (1)/(2)F₂(g) → LiF(s) & -617 Based on the data provided, the value of electron gain enthalpy of fluorine would be:
For a sparingly soluble salt ApBq, the relationship of its solubility S with its solubility product Kₛp is:
Which of the following forms the base of talcum powder?
The important antioxidant used in food is:
The first emission line in the atomic spectrum of hydrogen in the Balmer series appears at:
An electron has magnetic quantum number ml=-3. What is its principal quantum number?
Which of the following method gives better yield of p-nitrophenol?
Formation of polyethylene from calcium carbide takes place as follows: beginaligned CaC₂ + 2H₂O &→ Ca(OH)₂ + C₂H₂
C₂H₂ + H₂ &→ C₂H₄
nC₂H₄ &→ (-CH₂-CH₂-)ₙ endaligned The amount of polyethylene obtained from 64.1kg of CaC₂ is:
Sometimes, the colour observed in Lassaigne’s test for nitrogen is green. It is because:
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 Tollen’s reagent?
A 1.25g sample of a mixture of Na₂CO₃ and Na₂SO₄ is dissolved in 250mL solution. 25mL of this solution neutralises 20mL of 0.1NH₂SO₄. The % of Na₂CO₃ in the sample is:
Which of the following compound has all the four types (1°, 2°, 3° and 4°) of carbon atoms?
Which of the following has two stereoisomers?
An aromatic compound has molecular formula C₇H₇Br. Give the possible isomers and appropriate method to distinguish them.
The decreasing order of the ionization potential of the following elements is:
Knowing that the chemistry of lanthanoids (Ln) is dominated by its +3 oxidation state, which of the following statements is incorrect?
Which of the following arrangements does not represent the correct order of the property stated against it?
Which of the following is paramagnetic?
The hypothetical cis–chloro–diaquatramminecobalt(III) chloride can be represented as:
The normality of 26% (w/v) solution of ammonia (density =0.855) is approximately:
A lens having focal length f and aperture of diameter d forms an image of intensity I. Aperture of diameter d/2 in central region of lens is covered by a black paper. Focal length of lens and intensity of image now will be respectively:
In PO₄³-, the formal charge on each oxygen atom and the P–O bond order respectively are: