Archives

Two liquids (P) and (Q) can be separated by the method of fractional distillation. The boiling points of P and Q are _ and ___ respectively.

(A) 329 K and 332 K (B) 329 K and 354 K (C) 329 K and 373 K (D) 329 K and 473 K The Correct Answer is (A) 329 K and 332 K. Solution:... View Article

Which one of the following schemes of ordering closed packed sheets of equal-sized spheres do not generate close-packed lattice?

(A) ABCABC (B) ABBAABBA (C) ABACABAC (D) ABCBCACBC The Correct Answer is (B) ABBAABBA Solution: The scheme ABBAABBA of ordering... View Article

Which of the following series of transitions in the spectrum of hydrogen atoms fall in the visible region?

(A) Lyman series (B) Brackett series (C) Balmer series (D) Paschen series The Correct Answer is (C) Balmer series. Solution: In the... View Article

Which of the following arrangements does not represent the correct order of property stated against it?

(A) Sc < Ti < Cr < Mn: Number of oxidation states (B) Ni2+ < Co2+ < Fe2+ < Mn2+: Ionic size (C) V2+ < Cr3+ < Mn2+ <... View Article

For an exothermic chemical process occurring in two steps as (i) A+B→X (Slow) and (ii) X→AB (Fast). The progress of the reaction can be best described by:

The Correct Answer is (B) Explore more such questions and answers at BYJU'S.... View Article

The mass percentage of urea in an aqueous solution is 30%. The molality of urea in the solution is:

(A) 4.5 m (B) 5.2 m (C) 6.1 m (D) 7.1 m The Correct Answer is (D) 7.1 m. Solution: Molality = Weight of Water = 100 - 30 = 70 g... View Article

H2S, toxic gas with a rotten egg-like smell, is used for the qualitative analysis. If the solubility of H2S in water at STP is 0.195 m. Calculate Henry’s law constant.

(A) 213.8 bar (B) 282.0 bar (C) 345.8 bar (D) 462.9 bar The Correct Answer is (B) 282.0 bar Solution: 1kg of solvent contains . Mole... View Article

The relative lowering of the vapour pressure of an aqueous solution containing a non-volatile solute is 0.0125. The molality of the solution is:

(A) 0.07 (B) 0.30 (C) 0.70 (D) 0.125 The Correct Answer is (C) 0.70 Solution: As we know: The relative lowering of the vapour... View Article

An ideal gas at 27°c has compressed adiabatically to 8/27 of its original volume. If γ = 5/3 then the rise in temperature will be

(A) 225 K (B) 305 K (C) 375 K (D) 450 K The Correct Answer is (C) 375 K. Solution: As given: Degree of freedom, γ = 5/3 Let the initial... View Article

Two moles of a monoatomic gas are mixed with three moles of a diatomic gas. What will be the molar specific heat of the mixture at a constant volume?

(A) 1.6 R (B) 2.1 R (C) 3.6 R (D) 6.25 R The Correct Answer is (B) 2.1 R Solution: As given: The number of moles of a monatomic gas n1 = 2... View Article

Archives

Two liquids (P) and (Q) can be separated by the method of fractional distillation. The boiling points of P and Q are _ and ___ respectively.

Which one of the following schemes of ordering closed packed sheets of equal-sized spheres do not generate close-packed lattice?

Which of the following series of transitions in the spectrum of hydrogen atoms fall in the visible region?

Which of the following arrangements does not represent the correct order of property stated against it?

For an exothermic chemical process occurring in two steps as (i) A+B→X (Slow) and (ii) X→AB (Fast). The progress of the reaction can be best described by:

The mass percentage of urea in an aqueous solution is 30%. The molality of urea in the solution is:

H2S, toxic gas with a rotten egg-like smell, is used for the qualitative analysis. If the solubility of H2S in water at STP is 0.195 m. Calculate Henry’s law constant.

The relative lowering of the vapour pressure of an aqueous solution containing a non-volatile solute is 0.0125. The molality of the solution is:

An ideal gas at 27°c has compressed adiabatically to 8/27 of its original volume. If γ = 5/3 then the rise in temperature will be

Two moles of a monoatomic gas are mixed with three moles of a diatomic gas. What will be the molar specific heat of the mixture at a constant volume?

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Table of 67

27 Jan 2022: The Hindu Analysis

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