InterviewSolution
Saved Bookmarks
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.
| 5151. |
Glycolysis |
| Answer» Solution :The process occurring in the CELL where a molecule of GLUCOSE is ocidized in step by step process forming two molecules of each of pyruvic ACID, ATP, `NADH_(2)` and water, is called glycolysis. | |
| 5152. |
m' kg of a substance of specific beat capacity J//kg^@Cis heated, so that its temperature rises from theta_1^@Cto theta_2^@C. Write down the expression for the heat Q supplied. |
|
Answer» Solution :Heat supplied (Q) = MASS x specific heat CAPACITY x RISE in TEMPERATURE `THEREFORE Q= m xx s xx (theta_2-theta_1)` |
|
| 5154. |
Define anaerobic degradations. |
| Answer» SOLUTION :The decomposition which TAKES PLACE in the ABSENCE of OXYGEN by anaerobic bacteria is called anserobic degradation. | |
| 5155. |
The ________ of a body does not changeas long as no externalforce acts on it . |
| Answer» SOLUTION :LINEAR MOMENTUM | |
| 5156. |
What do you need to do these works ? |
| Answer» SOLUTION :Both human BEINGS or MACHINES need energy to do work. | |
| 5157. |
An electric lamp of 24 Omega and a conductor of 6 Omega are connected in parallel to a 12 V battery. Calculate : (i) Total resistance (ii) Total current in the circuit Potential difference across the conductor. |
|
Answer» Solution :`R_(1)= 24 OMEGA, R_(2) = 6 Omega, V=12 V` (i) `R = (R_(1)R_(2))/(R_(1)+R_(2))=(6xx24)/(30)=4.8 Omega` (ii) `I= (V)/(R)= (12V)/(4.8) =(10)/(4) A = 2.5A` (III) Potential difference across the conductor will be 12 V because these are joined acrolls the battery. |
|
| 5159. |
Mention one advantage of having two eyes instead of one. |
| Answer» SOLUTION :It provides a wider FIELD of view and helps to GAUGE the THIRD dimension-depth. | |
| 5160. |
In Fleming's right hand rule, middle finger indicates the direction of: |
|
Answer» magnetic FIELD |
|
| 5161. |
I am metamerically segmented , blood sucking , ectoparasite . I have suckers . Who am I and to what phylum do I belong to ? |
| Answer» SOLUTION :LEECH , PHYLUM ANNELIDA. | |
| 5162. |
To find the image - distance for varying object - distance in the case of a convex lens, a student obtains on screen a sharp image of a bright object placed very far from the lens. After that the gradually moves the object towards the lens and each time focuses its image on the screen.(a) In which direction - towards or away from the lens, does he move the screen to focus the object ?(b) What happens to the size of the image - Does it increase or decrease ?(c ) What happens when he moves the object very close to the lens ?(d) What happens to the intensity of the image as the object moves farther and farther away from the convex lens ? |
|
Answer» Solution :(a) The student should move the SCREEN away from the convex lens to FOCUS the IMAGE of the object on the screen. (b) The size of the image increases. (c ) When the object is moved CLOSE to the lens IE., between F1 and the optic centre, an enlarged virtual and erect image is formed. Image of the object cannot be caught on the screen. (d) The intensity of the image gradually increases as the object moves away from the convex lens. |
|
| 5163. |
What precaution should be taken to avoid the overloading of domestic electric circuits ? |
|
Answer» Solution :To avoid overloading, following PRECAUTIONS should be taken : i] Not using too many electricalappliances at the same time ii] Not CONNECTING toomany electrical appliances to a single socket iii] Appliances with 5 A and 15 A current rating MUST be CONNECTED in separate circuits along with a fuse iv] Using WIRES with good insulation, if insulation is worn out, replacingthe wires immediately |
|
| 5164. |
Distinguish between : AC generator and DC generator. |
Answer» SOLUTION :
|
|
| 5166. |
What are the factors on which refractive index depends ? |
|
Answer» SOLUTION :(a) The nature of the material (B) The wavelength of the LIGHT used (c ) The MEDIUM in which it is PLACED (d) Temperature of the surroundings |
|
| 5167. |
State any four benefits of classification. |
|
Answer» Solution :Benefits of classification: (1) Studying the different annnals becomes easy when they are placed under different groups. (2) When few representative animals of the particular group are studied then the idea about other animals belonging to that group alsobecomes clear. (3) The ANIMAL evolution becomes EASIER to follow after studyingclassification. (4) The identification of animals can be done accurately. (5) Relationship of the different animals with each other and with other groups can be understood clearly. (6) Habitat of each animal and its role in nature is understood by classification. (7) Various adaptations are understood by learning classification. |
|
| 5168. |
The strength of the magnetic field produced in a current-carrying straightconductoris |
|
Answer» DIRECTLY PROPORTIONALTO the DISTANCE from the wire |
|
| 5169. |
Mention the advantage of A.C. over D.C. for long distance transmission. |
| Answer» Solution :A.C. can be easily TRANSMITTED over long distances WITHOUT MUCH LOSS of energy. | |
| 5170. |
How will you conclude that the same potential difference [voltage] exists across three resistors connected in a parallel arrangement to a battery? |
Answer» Solution :The experimental setup comprises THREE resistors `R_(1),R_(2)andR_(3)` which are joined in parallel combination and connected with a battery, an ammeter [A], a voltmeter [V] and a PLUG key K, as shown in Fig. [a]. The key K is closed, and the voltmeter and ammeter readings are recorded.  The key K is open and removing the ammeter and voltmeter form the circuit and INSERT the voltmeter V in parallel with `R_(1)`, and ammeter in series with the resistor `R_(1)`, as shown in Fig. [b]. Again, the voltmeter and ammeter readings are recorded. Similarly, measuring the potential differences across resistances, `R_(2)andR_(3)`, it is found that voltmeter gives identical reading which leads to conclude that the VOLTAGE or potential difference across each resistor is same and equal to the potential difference across the combination. |
|
| 5173. |
State the important uses of solar cells. |
|
Answer» Solution :Solar cells are USED (i) for providing ELECTRICITY in artificial satellites. (ii) for lighting the street LIGHTS , traffic signals , running television and radio sets in remote areas. (III) for providing electricity in lighthouses. (iv) for operating ELECTRONIC watches and calculators. |
|
| 5174. |
Name the cells which help Hydra to reproduce. How does a bud develop in Hydra ? |
| Answer» Solution :REGENERATION Cells, BUD development in hydra: REPEATED cell division at ONE specific site. | |
| 5175. |
A student has to do the experiment on finding the focal length of a given convex lens by using a distant object. She can do her experiment if she is also made available : |
|
Answer» a LAMP and a screen |
|
| 5176. |
(i) Keep a glass slab on a blank paper and draw its outline PQRS as shown in the figure. (ii) Draw an inclined straight line on the side of PQ so that it intersect PQ at N. Pierce two pins vertically at two points A and B along the line. (iii) Look at the pins A and B from the opposite side of the slab and pierce pins C and D vertically so that the images of A and B are in line with C and D. (iv) Now remove the chip and the pins and draw a straight line going through points C and D so that it intersects SR at M. (v) Join points M and N. Observe the incident ray AN and emergent ray MD. Questions: (a)What is your observation about the emergent ray and incident ray ? |
| Answer» SOLUTION :Incident ray and EMERGENT ray lie parallel to each other. | |
| 5177. |
A body projected at an angle with the horizontal has a range 300 m. I the time of flight is 6s, then the horizontal component of velocity is |
|
Answer» 30 m/s `U cos theta = (R)/(T) = (300)/(6) = 50 m//s` |
|
| 5178. |
What are the factors that effect the speed of sound in gases? |
|
Answer» Solution :(i) Effect of density (ii) Effect of temperature (III) Effect of HUMIDITY |
|
| 5179. |
Two solid spheres of the same mass are made of metals of different densities. Which of them has a large moment of inertia about the diameter ? |
| Answer» Solution :SPHERE of small density will have LARGE MOMENT of inertia. | |
| 5180. |
The followingchangeis observed ondippinga litmuspaper in aqueous_____ solutionofMgO. |
|
Answer» Redlitmusturusblue , THEREFORE MgOis alkaline |
|
| 5181. |
A boat full of iron nails is floating on water in a lake. When the iron nails are removed the after level |
|
Answer» rises |
|
| 5182. |
match the following:{:("1.Deuterium", (a) ""_(-1)e^(0)), ("2. Protium", (b) ""_(1)He^(3)), (3. "Tritium", (c) ""_(2)He^(4)),(4. "alpha-decay" , (d)""_(1)He^(1)),(5. beta-decay, (e)""_(1)He^(2)):} |
| Answer» SOLUTION :1. (e) `""_(1)H^(2)` ,2. (d) `""_(1)H^(1)` , 3. (b) `""_(1)H^(3)` , 4. (C) `""_(2)He^(4)` ,5. (a), `""_(-1)e^(0)` | |
| 5183. |
What are the parts of battery ? |
|
Answer» SOLUTION :1. ELECTROLYTE 2. ELECTRODES |
|
| 5184. |
A child is standing in front of a magic mirror. She finds the image of her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from the top. |
|
Answer» PLANE, CONVEX and CONCAVE |
|
| 5185. |
Why do electricians wear rubber hand gloves while working? |
| Answer» Solution :Rubber is an ELECTRICAL insulator and THEREFORE electrician can WORK safely. | |
| 5187. |
How many electrons will be there in 1.6 C charge? |
|
Answer» `10^17` |
|
| 5188. |
(a) Explain solar cell panel. (b) Give the principle of working of a windmill. |
Answer» Solution : (a) A solar cell is a device whichconverts solar ENERGY directlyinto electricity. A group of solar cells is called a solar cell panel. It consists of a large number of solar cells. Joined togetherin a definite pattern. It providesa lot of electric energyrequired by artificial satellites, water pumps, street lighting, etc. For joining the various solar cells in a solar panel, silver wires are used because silver (metal) is the best conductorof electricity having a very LOW resistance, which also INCREASES the efficiency. (b) When the blowing wind strikes the blades of a windmill, it exerts a force on them. As a result of this force, the blades of the windmill start rotating. The rotation of the blades of the windmill causes to and fro (or up to down) motion in the crank (or connecting rod). This rotary motion is used to turn the turbines of electric generatorsto produce electricity and also to DRIVE a large number of machines like water pumps and FLOUR mills. A large number of windmills erected over a large area are known as a wind energy farm. |
|
| 5189. |
A squirrel is in a scary situation. Its body has to prepare for either fighting or running away, State the immediate changes that take place in its body so that the squirrel is able to either fight or run ? |
| Answer» Solution : When the squirrel is in a scary situation, its body relies on neural as well as chemical signals. These chemicals are hormones, in this case – Adrenaline. Adrenaline is secreted DIRECTLY into the blood and carried to different parts of the body. The target organs or the specific tissues on which it acts INCLUDE the heart. As a result, the heart beats faster, resulting in supply of more OXYGEN to our muscles. The blood to the digestive system and SKIN is reduced due to contraction of muscles around small arteries in these organs. This diverts the blood to our skeletal muscles. The breathing rate also increases because of the contractions of the diaphragm and the rib muscles. All these responses TOGETHER enable the animal body to be ready to deal with the situation. | |
| 5190. |
D. N. A.: |
| Answer» Solution :D. N. A. decide the hereditary characters. They synthesise m-RNA according to its own NUCLEOTIDE SEQUENCE and THEREBY help in the process of PROTEIN synthesis. | |
| 5191. |
We prefer a convex as a rear view mirror in vehicles. Why? |
| Answer» SOLUTION :DUE to its WIDE FIELD to VIEW. | |
| 5192. |
5 cm high object is placed at a distance of 25 cm from a converging lens of focal length of 10 cm. Determine the position, size and type of the image. |
|
Answer» object distance (u) = - 25 cm, height of the object `(h_(1)) = 5 cm` To find: Image distance (v), height of the image `(h_(2))` Formulae: i. `(1)/(f)=(1)/(v)-(1)/(u)` ii. `(h_(2))/(h_(1))=(v)/(u)` CALCULATION: From formula (i), `(1)/(10)=(1)/(v)-(1)/(-25)` `therefore" "(1)/(v)=(1)/(10)-(1)/(25)=(5-2)/(50)` `therefore" "(1)/(v)=(3)/(50)` `therefore" "v=16.7 cm` As the image distance is positive, the image formed is REAL. From formula (ii), `(h_(2))/(5)=(16.7)/(-25)` `therefore" "h_(2)=(16.7)/(25)xx5=-(16.7)/(5)` `therefore" "h_(2)=-3.3 cm` The NEGATIVE SIGN indicates that the image formed is inverted. |
|
| 5193. |
calculate the number of moles. 27.95 g of iron |
| Answer» SOLUTION :A solution must at least be consisting of TWO components. Such SOLUTIONS which are made of one solute and one solvent are called BINARY solutions (e.g.) adding `CuSO_4` crystals to water. | |
| 5194. |
The velocity time graph for the veticaly component of the velocity of a body thrown upwards from the ground and landing on the roof of a building is given in the figure.The height of the building is: |
|
Answer» 50 m `V=0m//s` `t=3s "" S=h=?` `v=u+a t` `0= 30+a(3)` `a=(-30)/(3)=-10m//s^(2)` `V^(2)=u^(2)+2aS` `O=(30)^(2) +2(-10)h` `(-30)^(2)=-20h` `h=(-30xx 3cancel0)/(-2cancel0)=45m` From MAX. height to roof of building `h=(u^(2))/(2g)=(10^(2))/(2xx10)=5m` height of building `=H-h=45-5` `= 40 m` |
|
| 5195. |
Principal focus of convex lens: |
Answer» Solution :When LIGHT rays parallel to the PRINCIPAL AXIS are incident on a CONVEX lens, they converge to a point on the principal axis. This point is called the principal focus of the lens. 
|
|
| 5196. |
Activity: Hang two equal weights on the slab as shown in the figure. |
|
Answer» Solution : OBSERVATION: The WIRE gradually PENETRATES the ice slab and comes out of lower surface of the slab after some time without breaking the slab. |
|
| 5197. |
There was some construction work going on in the neighbourhood of Amar Singh. One day when Amar Singh came back form his office, he saw his ten year old son standing near the welder and looking at the electric welding being done with great curiosity. Amar Singh grabbed his son by the arm and brought him inside the house quickly. He firmly told his son not to look at electric welding being done again because it is extremely harmful. Amar Singh then went out and scolded the welder for allowing a child to stand near him and watch the electric welding being done. The welder said 'sorry' to Amar Singh for the lapse on his part. (a) Why did Amar sing bring his son inside the house quickly ? (b) What harm could have been done to the child by staring at the electric welding and Why ? (c) Name a natural luminous object which can do the same damage when looked at straight with naked eye for a considerable time. (d) What other harm could have been done to the child by standing near the welder when electric welding was being done ? (e) What value are exhibited by Amar Singh in this episode ? |
|
Answer» Solution :(a) Amar Singh brought his SON inside the house quickly to PROTECT his son from damage to his eyes and possible burns. (b) Electric welding produces enormously bright light. This extremely bright light COULD have damaged the retina of the eye. (c) The sun is also an extremely bright object in the sky which can damage the retina of eyes if looked at straight with naked eyes for a CONSIDERABLE time. (d) The electric welding produces sparks which fly off an all directions. The extremely hot sparks of electric welding could cause burns on the body of the child standing nearby. (e) Amar Singh exhibited the values of (i) Awareness (that electricwelding can damage the eyes and also cause burns) (II) Concern for his son (to protect his eyes and prevent burns), and (iii) Teach lesson to wrong doer (by scolding the welder). |
|
| 5198. |
How would the strength of magnetic field due to a current-carrying loop be affected, if: (a) the radius of the loop is reduced to half of its original value, and (b) the strength of the current through the loop is doubled ? Give reason for your answer. |
|
Answer» Solution :(a) If the RADIUS of current loop is reduced to half of its ORIGINAL value, the strength of magnetic field is doubled as magnetic field. (B) is INVERSELY PROPORTIONAL to the radius (r) of loop. (b) As strength of magnetic field is proportional to current (1) flowing through the loop `(B PROP l)`, the magnetic field is doubled if current is doubled. |
|
| 5199. |
When a ray of light passes from a denser medium to a rarer medium, the ray …………. . |
|
Answer» BENDS away from the NORMAL |
|
| 5200. |
One studentis doingexperiment to drawto the pathof lightrayspassingthrougha glassslab. IncidenceInall thecasesthe foundthat _____ |
|
Answer» Theangleofincidenceis largestthan theangleof REFRACTION , BUTIS almostequalto theangleof emergane . |
|