InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
During osmosis, flow of water through a semipermeable membrane is:A. from solution having higher concentration onlyB. from both sides of sides of semi-permeable membrane with equal flow ratesC. From both sides of semi-permeable membrane with unequal flow ratesD. from solution having lower concentration only |
| Answer» Correct Answer - D | |
| 2. |
Reduction potential for the following h alf-cell reaction are `Zn rarr Zn rarr Zn^(2+)+2e^(-),E_(Zn^(2+)//Zn)^(@) = -0.76V` `Fe rarr Fe^(2+)+2e^(-),E_(Fe^(2+)//Fe)^(@) = -0.44V` The emf for the cell reaction `Fe^(2+)Zn rarr Zn^(2+)+Fe` will beA. `+0.32`B. `-0.32V`C. `+1.20V`D. `-1.20V` |
| Answer» Correct Answer - A | |
| 3. |
A modulated carrier wave has maximum and minimum amplitudes of 800 m v and 200 m V. What is the percentage modulation?A. 0.2B. 0.8C. 1D. 1.25 |
| Answer» Correct Answer - B | |
| 4. |
In an ac circuit `l=100 sin 200 pi t` . The time required for the current to achieve its peak value will beA. `(1)/(300)s`B. `(1)/(400)s`C. `(1)/(100)s`D. `(1)/(200)s` |
| Answer» Correct Answer - B | |
| 5. |
Two bodies `A and B` initially at rest are attrached towards each other due to gravitation. Given that `A` is much heavier than `B`. Which of the followings correctly describes the relative motion of the centre of mass of the bodies ?A. It moves towards AB. It moves towards BC. It moves perpendicular to the line joining the particlesD. It remains at rest w.r.t A as well as B. |
| Answer» Correct Answer - D | |
| 6. |
Light of wavelength `lamda` is incident on a slit of width d. the resulting diffraction pattern is observed on a screen at a distance D. the linear width of the principal maximum is, then equal to the width of the slit if D equalsA. `d/lamda`B. `(2lamda)/(d)`C. `(d^(2))/(2lamda)`D. `(2lamda^(2))/(d)` |
| Answer» Correct Answer - C | |
| 7. |
Compounds with antiseptic properties areA. `CHCl_(3)`B. `CHl_(3)`C. 0.3 ppm aqueous solution of `Cl_(2)`D. none of the above |
| Answer» Correct Answer - B | |
| 8. |
Which of the following are not used to convert RCHO into R `CH_(2)OH`?A. `H_(2)//Pd`B. `LiAlH_(4)`C. `NaBH_(4)`D. Reaction with RMgX followed by hydrolysis |
| Answer» Correct Answer - D | |
| 9. |
What products are obtained by the reaction of sodium with a mixture of 1-iodo-2-methyl propane and 2-iodo propaneA. 2,5-dimethyl hexaneB. 2,3-dimethyl butaneC. 2,4-dimethyl pentaneD. all of the above |
| Answer» Correct Answer - D | |
| 10. |
The graph between objecct distance u and image distance v for lens is givenn beow. The focal length of the lens is A. `5+-0.1`B. `5+-0.05`C. `0.5+-0.1`D. `0.5+-0.05` |
| Answer» Correct Answer - B | |
| 11. |
Calculate the ratio of capacitance of two capacitor filled with dielectrics of samme dimensions but off different values `K` and `(K)/(4)` arranged in two ways as shown in figure. (i) and (ii). A. `5:2`B. `25:4`C. `5:4`D. `2:5` |
| Answer» Correct Answer - B | |
| 12. |
The magnitude off magnetic moment of the current loop in the figure is A. `la^(1)`B. `sqrt(2)la^(2)`C. zeroD. none of these |
| Answer» Correct Answer - B | |
| 13. |
If M be the mass of the earth, R its radius (assumed spherical) and G gravitational constant, then the amount of work that must be done on a body of mass m, so that it completely escapes from the gravity of the earth of the earth is given byA. `(GmM)/(R)`B. `(GmM)/(2R)`C. `(3GmM)/(2R)`D. `(4GmM)/(3R)` |
| Answer» Correct Answer - A | |
| 14. |
In the relation, `P=alpha/beta e^((alphaZ)/(ktheta))P` is pressure, Z is distance, k is Boltzmann constant and `theta` is the temperature. The dimensional formula of `beta` will be-A. `[M^(0)L^(2)T^(0)]`B. `[ML^(2)T]`C. `[ML^(0)T^(-1)]`D. `[ML^(2)T^(-1)]` |
| Answer» Correct Answer - A | |
| 15. |
Shape selective catalyst are so called because of :A. the shape of the catalystB. the specificity of the catalystC. the size of the pores of catalyst, which can trap selective molecules onlyD. their use for only some selected reaction |
| Answer» Correct Answer - C | |
| 16. |
At what angle must the two forces `(x+y)` and `(x-y)` act so that the resultant may be `sqrt((x^(2)+y^(2)))` :-A. `cos^(-1)[-((x^(2)+y^(2)))/(2(x^(2)-y^(2)))]`B. `cos^(-1)[(-2(x^(2)-y^(2)))/((x^(2)+y^(2)))]`C. `cos^(-1)[-((x^(2)+y^(2)))/((x^(2)-y^(2)))]`D. `cos^(-1)[-((x^(2)-y^(2)))/((x^(2)+y^(2)))]` |
| Answer» Correct Answer - A | |
| 17. |
During an isothermal expansion of an ideal gasA. its internal energy decreasesB. its internal energy does not changeC. the work done by the gas is equal to the quantity of heat absorbed by itD. both b. and (c) are correct. |
| Answer» Correct Answer - D | |
| 18. |
When unpolarised light is incident on a plane glass plate at Brewster’s angle, then which of the following statements is correct?A. Reflected and refracted rays are completely polarised with their planes of polarisation parallel to each otherB. Reflected and refracted rays are completely polarised with their planes of polarisation perpendicular to each otherC. The reflected light is plane polarised but transmitted light is partially polarised annd are perpendicular to each otherD. the reflected light is partially polarised but refracted light is plane polarised. |
| Answer» Correct Answer - C | |
| 19. |
For a particular reaction `DeltaH^(@)=-38.3kJ and DeltaS^(@)=-113JK^(-1).` this reaction isA. spotaneous at all temperatureB. non-spotaneous at all temperatureC. spontaneous at a temperature below 338 KD. spontaneous at a temperature above 339 K |
| Answer» Correct Answer - C | |
| 20. |
An infinitely long hollow conducting cylinder with inner radius `(r )/(2)` and outer radius `R` carries a uniform current ra density along its length . The magnitude of the magnetic field , ` | vec(B)|` as a function of the radial distance `r` from the axis is best represented byA. B. C. D. |
| Answer» Correct Answer - D | |
| 21. |
A closed organ pipe and an open organ pipe of same length produce `4` beats when they are set into vibrations simultaneously. If the length of each of them were twice their initial lengths, the number of beats produced will beA. 2B. 4C. 1D. 8 |
| Answer» Correct Answer - A | |
| 22. |
In the givenn figure AB is a potentiometer wire of length 10 m and resistance `1Omega` with key K open the balancing length is 5.5 m. however on closing key K the balancing length reduces to 5m. The initial resistance of the cell `E_(1)` is A. `0.01Omega`B. `0.1Omega`C. `0.2Omega`D. `1Omega` |
| Answer» Correct Answer - B | |
| 23. |
Partition coefficient of an organic compound (A) in 50 mL. 20 betweenn ether and water. 5 g of (A) is 50 mL. water is shaken with 50 mL ether. (A) extracted into ether isA. 4.0gB. 4.2gC. 4.6gD. 4.8g |
| Answer» Correct Answer - D | |
| 24. |
In a closed flask of 5L, 1.0g of `H_(2)` is heated from 300 to 600 K. which of the following statement is incorrect?A. Pressure of the gas increasesB. The rate of collision increasesC. The number of mole of gas increasesD. The energy of gaseous molecules increases |
| Answer» Correct Answer - C | |
| 25. |
Arrange the following compounds in increasing order of their boiling points. `CH_(3)CHO,CH_(3)CH_(2)OH,CH_(3)OCH_(3),CH_(3)CH_(2)CH_(3)`A. `CH_(3)CH_(2)CH_(3) lt CH_(3)CH_(2)OH lt CH_(3)OCH_(3) lt CH_(3)CHO`B. `CH_(3)OCH_(3) lt CH_(3)CH_(2)CH_(3) lt CH_(3)CH_(2) OH lt CH_(3)CHO`C. `CH_(3)CH_(2)CH_(3) lt CH_(3)OCH_(3) lt CH_(3)CHO lt CH_(3)CH_(2)OH`D. `CH_(3)CH_(2)OH lt CH_(3)CHO lt CH_(3)OCH_(3) lt CH_(3)CH_(2)OH` |
| Answer» Correct Answer - C | |
| 26. |
Central atom is `sp^(3)d`-hydridised inA. `PCl_(5),BrF_(3),XeF_(2)`B. `PCl_(6)^(-),PCl_(4)^(+),XeF_(2)`C. `XeF_(2),XeO_(3),XeOF_(4)`D. `PCl_(5),PCl_(3),XeO_(3)` |
| Answer» Correct Answer - A | |
| 27. |
Which of the following is not true?A. `D_(2)O` freezes at lower temperature than `H_(2)O`B. Reaction between `H_(2)` and `Cl_(2)` is must faster than `D_(2)` and `Cl_(2)`C. Ordinary water electrolysed more rapidly than `D_(2)O`D. Bond dissociation energy of `D_(2)` is greater than `H_(2)` |
| Answer» Correct Answer - A | |
| 28. |
Calomel reacts with `NH_(4)OH` to giveA. `HgNH_(2)Cl`B. `NH_(2)-Hg-Hg-Cl`C. `Hg_(2)O`D. `HgO` |
| Answer» Correct Answer - A | |
| 29. |
Apart from tetrahedral geometry, another possible geometry for `CH_(4)` is square planar with the four `H` atoms at the corners of the square and the `C` atom at its centre. Explain why `CH_(4)` is not square planar?A. the absence of d orbitalB. the smaller size of C atomC. the smaller size of H atomD. All of the above |
| Answer» Correct Answer - A | |
| 30. |
Which of the following transition metal shows the highest oxidation state:A. `Fe`B. `Mn`C. `V`D. `Cr` |
| Answer» Correct Answer - B | |
| 31. |
On heating `K_(2)Cr_(2)O_(7)` with NaCl and conc. `H_(2)SO_(4)`, the gas liberated isA. `CrO_(2)Cl_(2)`B. `CrCl_(3)`C. `Cr_(2)O_(3)`D. `CrOCl_(2)` |
| Answer» Correct Answer - A | |
| 32. |
The geometry of `Ni(CO_(4))` and `Ni(PPh_(3))_(2)Cl_(2)` areA. Both square planarB. Tetrahedral and square planar, respectivelyC. Both tetrahedralD. square planar and tetrahedral, respectively |
| Answer» Correct Answer - C | |
| 33. |
Sucrose (cane sugar) is a disaccharide. One molecule of sucrose on hydrolysis gives........ .A. 2 molecules of glucoseB. 2 molecules of glucose+1 molecule of fructoseC. 1 molecule of glucose+1 molecule of fructoseD. 2 molecules of fructose |
| Answer» Correct Answer - C | |
| 34. |
If a string is stretched with a weight 4 kg then the fundamental frequency is equal to 256 Hz. What weight is needed to produce its octave?A. 4 kg-wtB. 12 kg-wtC. 16 kt-wtD. 24 kg-wt |
| Answer» Correct Answer - C | |
| 35. |
An elastic string of length 2 m is fixed at its end. The string starts to vibrate in third overtone with a frequency 1200 Hz. The ratio of frequency of lower overtone and fundamental isA. 1B. 2C. 3D. 4 |
| Answer» Correct Answer - B | |
| 36. |
Excess of pressure inside a soap bubble isA. inversely proportional to its radiusB. directly proportional to its radiusC. directly proportional to square root of its radiusD. independent of its radius |
| Answer» Correct Answer - A | |
| 37. |
Point `A` and `B` are situated along the extended axis of `2 cm` long bar magnet at a distance x and `2x cm` respectively. From the pole nearer to the points, the ratio of the magnetic field at `A` and `B` will beA. `4:1` exactlyB. `4:1` approximatelyC. `8:1` exactlyD. `8:1` approximately |
| Answer» Correct Answer - D | |
| 38. |
A particle of mass m is moving in a circular path of constant radius r such that its centripetal acceleration `a_(c)` is varying with time t as `a_(c) = k^(2)rt^(2)`, where k is a constant. The power delivered to the particle by the forces acting on it is :A. `2pimk^(2)r^(2)t`B. `mk^(2)r^(2)t`C. `((mk^(4)r^(2)t^(5)))/(3)`D. zero |
| Answer» Correct Answer - B | |
| 39. |
What is the electric potential at a point distance 100 cm from the centre of an electric dipole of moment `2xx10^(-4)C-m` on a line laking an angle of `60^(@)`?A. `7xx10^(5)V`B. `8xx10^(5)V`C. `9xx10^(5)V`D. `10xx10^(5)V` |
| Answer» Correct Answer - C | |
| 40. |
A,B and C are the parallel sided trannsparent media of refractive indices `n_(1),n_(2) and n_(3)` respectively. They are arranged shown in the figure. A ray is incident at an angle `i` on the surface of separation of A and B which is as shown in the figure. after the refraction into the medium B, the ray grazes the surface of separation of the media B and C. Then, sin `i` equal to A. `(n_(3))/(n_(1))`B. `(n_(1))/(n_(3))`C. `(n_(2))/(n_(3))`D. `(n_(1))/(n_(2))` |
| Answer» Correct Answer - A | |
| 41. |
A charge Q is uniformly distributed over the surface of two conducting concentric spheres of radii R and r (Rgtr). Then, potential at common centre of these spheres isA. `(kQ(R+r))/(Rr)`B. `(kQ(R+r))/((R^(2)+r^(2)))`C. `(kQ)/(sqrt(R^(2)+r^(2)))`D. `kQ((1)/(R)-(1)/(r))` |
| Answer» Correct Answer - B | |
| 42. |
A charged particle of mass m and charge q is accelerated through a potential difference of V volts. It enters a region of uniform magnetic field which is directed perpendicular to the direction of motion of the particle. Find the radius of circular path moved by the particle in magnetic field.A. `sqrt(((Vm)/(qB^(2))))`B. `(2Vm)/(qB^(2))`C. `sqrt(2qV_(m))((1)/(B))`D. `sqrt(((Vm)/(q)))((1)/(B))` |
| Answer» Correct Answer - C | |
| 43. |
The total electricl resistannce between the points A and B of the circuit shown is A. `9.23Omega`B. `15Omega`C. `30Omega`D. `100Omega` |
| Answer» Correct Answer - A | |