InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 351. |
what is sodium ion for example? |
| Answer» <p>Thesodium ion(Na+) is an important electrolyte in neuron function, and in osmoregulation between cells and the extracellular fluid. This is accomplished in all animals by Na+/K+-ATPase, an active transporter pumpingionsagainst the gradient, andsodium/potassium channels.</p> | |
| 352. |
The blue colour of sky is due to which of the followingphenomenon- |
| Answer» <p>This phenomenon is called "scattering." The type of scattering responsible for blue sky is known as Rayleigh scattering. Because this effect becomes sharply more pronounced as the energy of light increases, wavelengths at the blue end of the spectrum, where energy is the highest, are scattered preferentially. The sunlight reaching our eyes has a high ratio of short, bluish wavelengths compared to medium and long wavelengths, so we perceive the sky as being blue.</p> | |
| 353. |
3)Explain two examples from our everyday life based on Newton'sThird Law of Motion. |
| Answer» <p>Forexample, when you jump, your legs apply a force tothe ground, andtheground applies and equal and opposite reaction force that propels you into theair. Engineers applyNewton's third lawwhen designing rockets and other projectile devices.</p> | |
| 354. |
2. Describe the different methods of asexual reproduction. Give examples.3. Explain what you understand by sexual reproduction. |
| Answer» <p>There are several different methods of asexual reproduction. They includebinary fission,fragmentation, andbudding.Binary fissionoccurs when aparentcell splits into two identical daughter cells of the same size.</p> | |
| 355. |
uestiols1. Write down the Jormulae of(U sodium oxide(i) aluminium chloride(i) sodium suphide(iv) magnesium hydroxiden the names o |
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| 356. |
why is plant produced from seeds |
| Answer» <p>Most plants grow from seeds. These seed plants fall into two groups, angiosperms and gymnosperms. Angiosperms are the flowering plants. Their seeds develop inside a female reproductive part of the flower which usually ripens into a fruit. Seeds may be carried away from the parent plant by wind, water, or animals.</p> <p>most plants do not grow without seeds, if the seed will not grow the plants not grow , if plant will not grow we will die</p> | |
| 357. |
Write down the formulae of(i) sodium oxide(ii) aluminium chloride(iii) sodium suphide(iv) magnesium hydroxide |
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| 358. |
How are seeds different from grains? |
| Answer» <p>Aseedis defined as an embryonic plant covered in aseedcoat, often containing some food. It is formed from the ripened ovule of plants after fertilization. ... Agrainis a small edible fruit, usually hard on the outside, harvested from grassy crops</p> | |
| 359. |
LAUBTIBILDLIL DU TIBI9. Compounds such as alcohols and glucose contain hydrogen but are not categorizedas acids.Describe an activity to prove it.Ans. Prema sol oand alrnhol |
| Answer» <p>Why do HCl, HNO3 etc., show acidic characters in aqueous solutions while solutions of compounds likealcohol and glucosedonotshow acidic character? Ans. ... While solutions of compounds likealcohol and glucosedonotform any such ions so they donotshow acidic characters.</p> <p>Compounds like alcohol and glucose contain H but it doesn't dissociate intoH^+H+. So it is not an acid.</p><p>Activity:Take two bluelitmus paper. Dip them intoglucose If they were acids, then the blue litmus paper would have changed to red.</p> | |
| 360. |
E. Match the following:Column AColumn Ba. whiteb. yellowc. blackd. red1. Copper oxide\/V 2, Calcium oxide3. Mercuric oxide4. Lead oxide |
| Answer» <p>1. c2. a3. d4. b are the answers</p> <p>Perhaps the answer is correct </p> | |
| 361. |
24. The figure shows the position time graph of a particle moving on a straight line path. What is themagnitude of average velocity of the particle over 10 seconds?60(b) 4 ms(a)2 ms406 ms(d) 8 ms1, 20 |
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| 362. |
(D) first increases then decreases2. In a circus, stuntman rides a motorbike in a circular track of radius R in the vertical plane. The minimumspeed at highest point of track will be(A) 2gRRaj. PET 1999](B) 2gR(D) gR |
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| 363. |
2. A body covers half the distance with a speed of 20m/s and the other half with a speed of 30m/s. The average velocity of theduring the whole journey is.(h 25mls |
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| 364. |
F-5s Vapour pressure of CsHe and CrHe mixture at 50°C is given P (mm Hg)- 180x+90, where Xa is themole fraction of CeHe. A solution is prepared by mixing 12 mol benzene and 8 mol toluene and fvapours over this solution are removed and condensed into liquid and again brought to the temperature50°C, what would be mole fraction of CoHe in the vapour state. (At. wt. of C 12, H 1) |
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| 365. |
a) Calculate the power of the pump which can lift 100 kg of water to store in a water tank atthe height of 19 m in 25 sec. (take the value of g-10 m/s')b) Describe two methods used to reduce the friction between two surfaces. |
| Answer» <p>Reducethe forces acting on thesurfaces. </p><p>Reducethe contactbetweenthesurfaces.</p> | |
| 366. |
09 a) Give the reaction involved ini) Roasting of Zinc blendeii Calcination of zinc carbonate (calamine) |
| Answer» <p>1)2ZnS + 3O2→ 2ZnO + 2SO22)In calcination process the carbonate ore is heated strongly in the absence of air to convert it into metal oxide. As obtaining metal from metal oxide is easy process.ZnCO₃ (on calcination) → ZnO + CO₂</p> | |
| 367. |
lassify the objects or materials given below as opaque, transparentranslucent and luminous or non-luminous:water, a piece of rock, a sheet of aluminium, a mirror, a wooden board.aheet of polythene, a CD, smoke, a sheet of plane glass, fog, a piece of red hoton an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paperir, |
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| 368. |
Inhichof the two-manure ouligere es man-madeOostati |
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| 369. |
Health and its Failure |
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| 370. |
Activity 4To show that chlorophyll is necessary forphotosynthesis |
| Answer» <p>yes it is correct answer </p> | |
| 371. |
GRB NEW ERA CHEMISTRYProblems For Pfollowinr the following changes involv1. State whetherREDOreduction:0x(a) Ferrous sulphate into ferric sulpha(b) Conversion of Cl2 to NaCI(c) Conversion of H2 S to SThchlor |
| Answer» <p>a. it is the oxidation reaction 2 FeSO4 + H2SO4 + H2O2 → Fe2(SO4)3 + 2 H2Ob.Na+1/2cl2=Nacl(Na+ cl-). thus in this reaction Na is oxidized and cl is reducedc.2 H2S+SO2=3S+2H20 is the oxidation reaction</p> | |
| 372. |
ped dulng hetdbolcal activiies in livingWhat is diabetes mellitus ? What are its symptoms and how is it treated ? |
| Answer» <p>Ans :- Diabetes mellitus is a disease that prevents your body from properly using the energy from the food you eat. Diabetes occurs in one of the following situations: The pancreas (an organ behind your stomach) produces little insulin or no insulin at all.</p><p>Some of the signs and symptoms of type 1 and type 2 diabetes are: Increased thirst. Frequent urination. Extreme hunger. Unexplained weight loss. Presence of ketones in the urine (ketones are a byproduct of the breakdown of muscle and fat that happens when there's not enough available insulin) Fatigue. Irritability.</p> | |
| 373. |
a) Write the postulates of Planck's quantum theory. |
| Answer» <p>Ans :- His basic postulate was that a) atoms have sub-particles; and b) those operate, in gas, as oscillating (the start of wave function quantum) store of energy (the quantum of energy). The electron was not a known fact, but Planck proved that the atomic structure with separate subparticles (electrons) must exist.</p> | |
| 374. |
1. When will you say a body is in(i) uniform acceleration? (i) non-uniform acceleration? |
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| 375. |
function of pituitary gland |
| Answer» <p>The hormones of the pituitary gland help regulate the functions of otherendocrineglands. The pituitary gland has two parts—the anterior lobe and posterior lobe—that have two very separate functions. The hypothalamus sends signals to the pituitary to release or inhibit pituitary hormone production.</p> | |
| 376. |
Describe in detail the pituitary gland and it is hormones |
| Answer» <p>The pituitary gland is an endocrine gland about the size of a pea and weighing 0.5 grams (0.018 oz) in humans. It is a protrusion off the bottom of the hypothalamus at the base of the brain. It is about the size of a pea and is situated in a bony hollow, just behind the bridge of your nose. It is attached to the base of your brain by a thin stalk.</p> | |
| 377. |
hat physical quantityismeasuredintorr?it related to the S.I. unit of the quantity ? |
| Answer» <p>pressure is measured in torr</p> <p>how it is releted to si unit of quantity</p> | |
| 378. |
Explain giving examples.Physical quantity |
| Answer» <p>A physical quantity is a physical property that can be quantified. Examples of physical quantities aremass, amount of substance,length, time, temperature, electric current, light intensity, force,velocity,density, and many others.</p> | |
| 379. |
areflection of rov dark room, ifyou hold up a mirror in front of you, will you seereflection of yourself in the mirror?one way and a rectangular shadow if held in anotheIn a completely4. |
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| 380. |
Döbereiner's triads also exist in the columns of Newlands' Octavesmpare and find out. |
| Answer» <p>1</p> <p>2</p> | |
| 381. |
how are fuels classified on the basis of their physical state? give two examples of each. |
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| 382. |
1. A bob of mass m, suspended by a string of lengC-th iis given a minimum velocity required to complete afull circle in the vertical plane. At the highest pointit collides elastically with another bob of mass msuspended by a string of length l2, which is initially at. Ifthe second bob, after collision acquires the minimumspeed required to complete a full circle in the vertical(JEE Ad. 2013)corest. Both the strings are massless and inextensibleplane, the ratio 11/12 is: |
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| 383. |
Name anĂ˝ three types of industries that release effluents in large quantities |
| Answer» <p>industry. These are primary, secondary, tertiary and quaternary. Primaryindustryinvolves getting raw materials e.g. mining, farming and fishing. Secondaryindustryinvolves manufacturing e.g. making cars and steel.</p> | |
| 384. |
F-2s Three balls A, B and C are placed on a smooth horizontal surface. Given that mA mc 4ms. Ball Bcollides with ball C with an initial velocity v as shown in figure. Find the total number of collisionsbetween the balls. All collisions are elasticVi |
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| 385. |
Knowledge Cheok1. A motor cycle is running at a constant speed o10 msT on a track. How much distance will it covein 1 hour?2. Three friends started their journey on bike from thsame point. Data of their journey is given belowthe table. Calculate the speed of all three and firout who amongst the three drives fastest.Name Distance travelled Time taken2 h1.5 h2.5 hRoy 130 kmJason 120 kmNitin 140 km |
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| 386. |
Write the difference between superscript and subscript. |
| Answer» <p>A subscript or superscript is a character that is set slightly below or above the normal line of type. It is usually smaller than the rest of the text. Subscripts appear at or below the baseline, while superscripts are above</p> | |
| 387. |
l 8lRymbols and subscript numbers is known as the formulaA metal M forms a compound MPO, What will be the formulaof the metal sulphate?1) M,SO,13.A) MiSOJ,14. Chemical formula for sod |
| Answer» <p>M2(SO4)3 </p><p>because PO4 has 3 charge , so, M will also have 3 charge , while SO4 , will have only 2 . </p><p>so, 3*M2 = 2*(SO4)3 = > 6 = 6</p> | |
| 388. |
Complete theeach blank is mumbered.paragraph using the words siven in the bnheavier, hot, wind, lighter, up, atumosphere, cold,Air is a component of (1)2)3)that forms he.. Air moves around, usually fromarea tfot a,area to a (4)than cold air, moves (6)eing (7)than hot air, takes its position. This movemlled(8)ate true (T) or false (F) and rewrite the correct statement.Cool air has a high pressure. |
| Answer» <p>1) atmosphere2) environment3) cold4) hot5)lighter6) up7) heavier8)wind</p> <p>thanks</p> | |
| 389. |
2Whatdo you mean by buoyancy? |
| Answer» <p>can u explaim ir in short</p> <p>can u explain it in short </p> | |
| 390. |
9. In what direction does the buoyant force on an objectimmersed in a liquid act? |
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| 391. |
19. In what direction does the buoyant force on an object immersein a liquid act? |
| Answer» <p>If an object is immersed in a liquid then the buoyant force due to liquid acts on the object in verticallyupward direction.</p> | |
| 392. |
Give the oxidation state of oxygen in H,O2 |
| Answer» <p>Hydrogen peroxide is neutral. Thus, sum of oxidation numbers of all the atoms is 0.</p><p>Oxidation state of H = +1 </p><p>Let the oxidation state of O be x.</p><p>Therefore, 2*(+1) + 2*x = 0 => 2x = -2 => x = -1.</p><p>Answer: Oxidation state of oxygen in Hydrogen peroxide is -1. </p> | |
| 393. |
9. The oxidation state of C in diamond isb. +1d. +2C. |
| Answer» <p>Oxidation number of an atom in pure element is zero. Therefore, oxidation number of carbon in diamond is zero.</p> | |
| 394. |
G-1. A particle having mass 2 kg is moving with velocity (2i +3j m/s. Find angular momentum of the particleabout origin when it is at (1, 1, 0). |
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| 395. |
Paris is the capital of France |
| Answer» <p>Yes, Paris is the capital of France.</p> | |
| 396. |
sample Problem. Light enters fromin glass ? (The speed of light in vacuum is 3x108 ms)Solution. We know that:m air into a glass plate having refractive index 1.50. What is the speedNCERT Book Question) |
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| 397. |
List two Fundamental Rights in the Constitution that Dalits can draw upon to insist that ttreated with dignity and as equals. Re-read the Fundamental Rights listed onnage 14 to help you answer this question.hey be1029 Scheduled Castes and |
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| 398. |
2) Write Newton's laws of Motion. (any two) |
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| 399. |
which phylum Of the plantae kingdom is known as amphibians and why |
| Answer» <p>Amphibians are those organisms which live on both land and in water. Bryophytes are called amphibians of the plant kingdom because these plants though live in soil but they need water for sexual reproduction. The sperm of bryophyte (antherozoids) are flagellate and need water to swim to the eggs. In other words, as these plants need water for reproduction unlike other plants, they are called as amphibians.</p> | |
| 400. |
What cause powerful storms ? |
| Answer» <p>Powerful storms such as thunderstorms, hurricanes, and tornadoes are generated when warm, light air rises quickly into higher, colder levels in an unstable updraft that can reach over 100 miles per hour. Each type of storm forms under specific conditions; hurricanes occur over moisture-rich oceans and coastlines, for example. They draw their energy from warm ocean waters. Understanding the conditions that give rise to powerful storms is the key to preparing for their devastating effects.</p> | |