InterviewSolution

Explore topic-wise InterviewSolutions in Class 11.

This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Class 11 knowledge and support exam preparation. Choose a topic below to get started.

1.	The density of a gas is `1.964 g dm^(-3)` at 273 K and 76 cm Hg. The gas is:A. `CH_(4)`B. `C_(2) H_(6)`C. `CO_(2)`D. `Xe`
Answer» Correct Answer - C

2.	4.4 g of a gas at STP occupies a volume of 2.24 L. The gas can be :A. `O_(2)`B. `CO`C. `NO_(2)`D. `CO_(2)`
Answer» Correct Answer - D

3.	The compressibility of a gas is less than unity at `STP`, therefore,A. `V_(m) gt 22.4` litreB. `V_(m) lt 22.4` litreC. `V_(m) = 22.4` litreD. `V_(m) = 44.8` litre
Answer» Correct Answer - B

4.	The rate of diffusion of methane at a given temperature is twice that of a gas `X`. The molecular weight of `X` isA. `64.0`B. `32.0`C. `4.0`D. `8.0`
Answer» Correct Answer - A

5.	273 mL of a gas at STP was taken to `27^(@)C` and 600 mm pressure. The final volume of the gas would be :A. 273 mLB. 300 mLC. 380 mLD. 586 mL
Answer» Correct Answer - C

6.	Assertion: On cooling, the brown colour of nitrogen dioxide disappears. Reason: On cooling, `NO_(2)` undergoes dimerisation resulting in the pairing of the odd electron in `NO_(2)`.A. If both A and R are correct and R is the correct explanation of AB. If both A and R are correct but R is not the correct explanation of AC. If A is correct but R is incorrectD. If A is incorrect but R is correct
Answer» Correct Answer - A

7.	Assertion: The plot of volume `(V)` versus pressure `(P)` at constant temperature is a hyperbola in the first quadrant. Reason: `V prop 1//P` at constant temperature.A. If both A and R are true and R is the correct explanation of AB. If both A and R are true but R is not the correct explanation of AC. If A is true but R is falseD. If both A and R are false
Answer» Correct Answer - A

8.	Assertion: Noble gases can be liquefied. Reason: Attractive forces can exist between nonpolar molecules.A. If both A and R are true and R is the correct explanation of AB. If both A and R are true but R is not the correct explanation of AC. If A is true but R is falseD. If both A and R are false
Answer» Correct Answer - A

9.	(A) At `27^(@)C`, the kinetic energy of 8 gram of methane is equal to the kinetic energy of 16 gram of oxygen (R) The total heat change in a reaction is the same whether the chemical reaction takes place in one single step or in several stepsA. If both A and R are correct and R is the correct explanation of AB. If both A and R are correct but R is not the correct explanation of AC. If A is correct but R is incorrectD. If A is incorrect but R is correct
Answer» Correct Answer - B

10.	Assertion: Sulphur dioxide and chlorine are bleaching agents. Reason: Both are reducing agents.A. If both A and R are true and R is the correct explanation of AB. If both A and R are true but R is not the correct explanation of AC. If A is true but R is falseD. If both A and R are false
Answer» Correct Answer - C

11.	Air enters in the lungs in a tiny cavity called alveoli. Oxygen diffuses into our blood from alveoli. The average radius of alveoli is 0.005 cm and air inside it contains 21% `O_(2)` and 79% `N_(2)`. Assuming that the pressure in the aveoli is 1 atm at body temperature of `37^(@)C`. Volume of single alveoli is :A. `5.23 xx 10^(-7) cm^(3)`B. `5.23 xx 10^(-9) cm^(3)`C. `5.23 xx 10^(-6) cm^(3)`D. `5.23 xx 10^(-8) cm^(3)`
Answer» Correct Answer - A

12.	At low pressure, the graph of `PV vs (1)/(V)` for a given amount at a constant temperature for a real gas is:A. straight line parallel to x-axisB. straight line having positive intercept and negative slopeC. straight line passing through origin having positive slopeD. none of the above
Answer» Correct Answer - B

13.	Surface tension of a liquid is a molecular phenomenon of liquids involving the force of cohension along the liquid molecules. It is scalar quantity and is numberically equal to the surface energy. Numerically, it is proved that the potential soluble salts and surfce active substance. Sparingly soluble salts and surface acitve substances decrease the surface tension of the liquid. However, the fairly soluble solutes increase the surface tension of the liquid. Surface tension of a liquid is independent of surface area but it depends on the intemolecular forces and the temperature. Which among the following is not the unit of surface tension ?A. dyne/cmB. newton/mC. `J//m^(2)`D. erg/cm
Answer» Correct Answer - D

14.	Surface tension of a liquid is a molecular phenomenon of liquids involving the force of cohesion among the liquid molecules. It is a scalar quantity and numerically equal to the surface energy. Numerically, it is proved that the potential enenergy of a liquid is maximum on the surface. Sparingly soluble salts and surface active substances decrease the surface tension of the liquid, however, the fairly soluble solute increase is independent of surface area but if depends on the intermolecular force and the temperature. Surface tension of a liquid is zero at:A. inversion temperatureB. boiling pointC. critical pointD. saturation point
Answer» Correct Answer - C

15.	Surface tension of a liquid is a molecular phenomenon of liquids involving the force of cohesion among the liquid molecules. It is a scalar quantity and numerically equal to the surface energy. Numerically, it is proved that the potential enenergy of a liquid is maximum on the surface. Sparingly soluble salts and surface active substances decrease the surface tension of the liquid, however, the fairly soluble solute increase is independent of surface area but if depends on the intermolecular force and the temperature. When oil is placed on the surface of hot water, formation of droplets takes place because :A. surface tension of hot water = surface tension of oilB. surface tension of hot water `lt` surface tension of oilC. surface tension of hot water `gt` surface tension of oilD. none of the above
Answer» Correct Answer - B

16.	Statement-I : The pressure inside the LPG cylinder remains constant even when it is in use at room temperature Because Statement -2 : Vpour pressure of any liquid is independent of its amount, it depends only on temperatureA. Statement -1 is true , statement -2 is true, statement-2 is a correct explanation of statement-1B. Statement-1 is true , statement -2 is true, statement-2 is not a correct explanation of statement -1C. Statement-1 is true, statement-2 is falseD. Statement -1 is false, statement-2 is true
Answer» Correct Answer - C

17.	Statement-I : A gas effuses our from a flask through an orifice (pinhole), rate of effusion decreases linearly with time Because Statement -2 : Pressure of the gas in the flask decreases with passage of timeA. Statement -1 is true , statement -2 is true, statement-2 is a correct explanation of statement-4B. Statement-1 is true , statement -2 is true, statement-2 is not a correct explanation of statement -4C. Statement-1 is true, statement-2 is falseD. Statement -1 is false, statement-2 is true
Answer» Correct Answer - D

18.	Air enters in the lungs in a tiny cavity called alveoli. Oxygen diffuses into our blood from alveoli. The average radius of alveoli is 0.005 cm and air inside it contains 21% `O_(2)` and 79% `N_(2)`. Assuming that the pressure in the aveoli is 1 atm at body temperature of `37^(@)C`. Number of `O_(2)` molecules in one alveoli is :A. `2.6 xx 10^(12)`B. `2.6 xx 10^(13)`C. `2.6 xx 10^(14)`D. `2.6 xx 10^(15)`
Answer» Correct Answer - A