Related InterviewSolutions

• The method of choice for determining the molecular weight of a polymer isA. osmotic pressureB. gas densityC. lowering of freezing pointD. direct weighing of a single molecule
• Consider the following transformations `CH_(3)COOH overset(CaCO_(3))to A overset("Heat")to B underset(NaOH)overset(I_(2))C` The molecular formula of C isA. `CH_(3)-underset(I)underset(|)overset(OH)overset(|)(C)-CH_(3)`B. `ICH_(3)-COCH_(3)`C. `CHI_(3)`D. `CHI_(3)I`
• Which of the following phloem elements do not have a nucleus but are still functional in transport?A. Pholem parenchymaB. Companion cellsC. Pholem fibresD. Sieve tubes
• One mole of `N_(2)H_(4)` loses ten moles of electrons to form a new compound `A`. Assuming that all the nitrogen appears in the new compound, what is the oxidation state of nitrogen in `A`? (There is no change in the oxidation state of hydrogen.)A. `-1`B. `-3`C. `+3`D. `+5`
• A conductor lies along the Z-axis at `-1.5 lt Z lt 1.5m` and carries a fixed current of 10.0 A in `-a_(z)` direction (see figure). For a field `B=3.0xx10^(-4)e^(-0.2x)a_(y)` T, find the powerr required to move the conductor at constant speed to `x=2.0m,y=0` in `5xx10^(-3)`s. assume parallel motionn along the X-axis. A. 1.57WB. 2.97 WC. 14.85 WD. 29.7W
• A `gamma`-ray photon is passing near a nucleus and breaks into an electron and positron. The region contains a uniform magnetic field B perpendicular to the plane of motion. Find the time after which they again converted into `gamma`-ray. The force of electrostatic interaction and gravitational interaction may be neglectedA. `(2pim)/(eB)`B. `(pim)/(2eB)`C. `(4pim)/(eB)`D. none of these
• A beam of light is travelling from region II to region III (see the figure). The refractive index in region I, II and III are `n_(0),(n_(0))/(sqrt(2)) and (n_(0))/(2)` respectively. The angle of incidence `theta` for which the beam just misses entering region III is A. `30^(@)`B. `45^(@)`C. `60^(@)`D. `sin^(-1)(sqrt(2))`
• A sphere rolls without slipping on a rough horizontal surface with cente of mass speed `v_(0)`. If mass of the sphere is M and its radius R, then what is the angular momentum of the sphere about the point of contact? A. `(5)/(2)Mv_(0)R`B. `(7)/(5)Mv_(0)R`C. `(3)/(5)Mv_(0)R`D. `(1)/(2)Mv_(0)R`
• Consider the statements given below regarging contrception and answer as directed thereafter: (1) Medical Termination of Pregnancy (MTP) during first trimester is generally safe (2) Generally chances of contraception are nil until mother breast-feeds the infant upto two years (3) Intrauterine devices like copper-T are effective contraceptives (4) Contraceptive pill may be taken upto one week after coitus to prevent conceptionA. a,cB. a,bC. b,cD. c, d
• A point charge Q is situated at point B on the ground. A point charge q of mass m is vertically dropped along line AB from a multi-storey building of height h. find the position of the point charge q, when it is in equilibrium. A. `sqrt((qQ)/(4piepsi_(0)mg))`B. `(Q)/(h^(2))`C. `(qh)/(m)`D. none of these