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.
| 1051. |
Where and in which forms are the amino acids formed after digestion of food used in the body? |
|
Answer» Solution :(1) After digestion of proteins, amino acids are FORMED. These amino acids are used to SYNTHESISE proteins in different forms e.g. (1) In blood-Haemoglobin and antibodies are formed. (2) In skin - MELANIN and keratin are formed. (3) In bones - Ossein is formed. (4) In pancreas- Insulin and trypsin are synthesised. (5) Pituitary and all other glands produce hormones by utilising amino acids. (6) In muscles - Actin and myosin are formed. (7) In all the cells, plasma membrane is formed by proteins. All enzymes are also synthesised using the amino acids. |
|
| 1053. |
Why do we not find food chains of more than four trophic levels in nature ? |
| Answer» Solution :Food chains with more than four trophic levels are generally not found in nature. This is because only 10% of ENERGY is transferred to NEXT trophic LEVEL. Hence, not much energy is left for further transfer after the fourth trophic level. This is ALSO known as 10% Law. | |
| 1054. |
Study the following current time graphs from two different sources. (i) Use above graphs to list word differences between the current in the two cases. (ii) Name the type of current in two cases (iii) Identify one 1ource each for these currents. (iii) What Is meant by the statement that uthe frequency of current in India is 50 Hz ? |
|
Answer» Solution :(i) (a) In (I) current is CONSTANT while in (II) current is variable. (b) In (I) current is in positive state while in (II) current is in both state. (ii) I : DIRECT current II : Alternating current (iii) I : From Battery (II) : From power SUPPLY in our houses (iv) Because current TYPE is alternating current that.s why frequency varies from 0 to 50 HZ. |
|
| 1055. |
A convex lens forms a real and inverted image of a pencil at a distance of 40 cm from the lens. The image formed is of the same size as the object Find the focal length and power of the lens. At what distance is the : object placed from the lens? |
|
Answer» <P> We are given that, `h_(2)=-h_(1)` Substituting for `h_(2)` in equation (i), `M=(-h_(1))/(h_(1))=-1` `therefore" "-1=(v)/(u)=(40)/(u)` `therefore" "u=-40 cm` (-ve sign indicates OBJECT is placed at left of lens) Step 4: Now, to calculate focal length, use formula `(1)/(f)=(1)/(v)-(1)/(v)"....(ii)"` Substituting values for object distance (u-40 cm) and image distance (v= + 40 cm), `(1)/(f)=(1)/(40)-(1)/(-40)+(1)/(40)=(2)/(40)=(1)/(20)` `therefore" "f=20 cm` Focal length of a lens `=20 cm =0.2 m` Step 5: Formula for calculating POWER of lens is given as, `P=(1)/(f)` Keep in mind that the above formula for power of lens is VALID only when the focal length of the lens is measured in metre. `therefore" "P=(1)/(0.2)=5D` |
|
| 1056. |
Mentionthe region of a current - carryingsolenoidwhere fieldlines are parallel straightlines . |
| Answer» SOLUTION :ALONG the AXISOF the SOLENOID. | |
| 1057. |
Power of a lamp is 60W. Find the energy is SI unit consumed by it in 1s. |
| Answer» SOLUTION :ENERGY CONSUMED `E=Pt=60W TIMES 1s=60J` | |
| 1058. |
State the Newton's second law of motion and deduce the Newton's first law from it. |
|
Answer» |
|
| 1059. |
If 4.8A current is passed through an electricalappliance, the number of electrons passing through it in 1 second will be ……….. . |
|
Answer» `0.33 XX 10^(19)` `:.n = (1 xxt)/E =(4.8xx 1)/(1.6 xx 10^(-19)) =3 xx 10^(19)` |
|
| 1060. |
What is magnetic effectof current ? |
| Answer» Solution :A current-carrying CONDUCTOR PRODUCES a MAGNETIC FIELD around it. | |
| 1061. |
(conserving, pledge, biodiversity, judicious, wildlife, mankind, diversity, destruction) I am aware that the …………………..on the Earth is for the existence of me, my family and the entire …………………….. . I am aware about the responsibility of ………………………… and protecting the rich diversity. I am aware about the fast-declining number of ........................, plants and animals. I am accepting the responsibility of ....................... use of natural resources and management of ......................... . I ....................... for adopting the following principles for happy and satisfactory life of all organisms on the Earth. |
| Answer» Solution :I am aware that the diversity on the Earth is for the existence of me, my FAMILY and the entire MANKIND. I am aware about the responsibility of conserving and protecting the RICH diversity. I am aware about the fast declining number of wildlife, plants and animals. I am accepting the responsibility of judicious use of natural resources and management of biodiversity. I PLEDGE for adopting the following PRINCIPLES for happy and satisfactory life of all organisms on the Earth. | |
| 1062. |
Which problems do the common man faces due to incidences of cyber crime ? |
|
Answer» Solution :Following problems are faced by common MAN due to incidences of cybercrime : CONSUMERS are deceived by showing superior items on websites but actually selling the items of either inferior quality or impaired ones. Bank transactions are done using PIN without the knowledge of consumers. Confidential information about government, institutes and companies is obtained from internet with the help of computer programs or other ideas and misused. This is called as hacking of information. Nowadays, crimes like opeining a fake accout of Facebook and displaying false information and thereby teasing the girls or exploiting them FINANCIALLY. Misuse or illegal sale of the written literture, softwere, photos, videos, music, etc. of others by obtaining from Internet is called as piracy. Electronic media is also misused by sending derogatory meassages, spreading vulgar pictures and inflammatory statements. Exchange of information through mesia like email, Facebook and WhatsApp occurs very fast. However, our personal information and phone numbers are automatically SPREAD and thereby reaches unwanted persons which leads to MALPRACTICES like unnecessary massages. Some of such massages either impair or shut down the mobilies and computers. 
|
|
| 1063. |
1kW :1000W::"1 kWh :"________ |
|
Answer» SOLUTION :`3.6xx10^(6)"JOULE"` 1 kW is EQUIVALENT to 1000 W and 1 kWh is equivalent to `3.6xx10^(6)"joule".` |
|
| 1064. |
News spread in the school that a student of Class IX-A has expired due to heart attack, but he has donated his beautiful eyes to one of his friends. All the members of school felt very sad for his untimely death, but on the other hand they were overwhelmed on hearing the donation of his eyes to his friend, who would now be able to see this beautiful nature. Answer the following questions based on the situation given above. (i) Do you think that the student who expired had done good job? Is it worth to donate vital organs? (ii) What values are promoted here? (iii) What other organs can be donated after dying? |
|
Answer» Solution :(i) Yes. Donating VITAL organs can make the LIFE of a living PERSON easier. (ii) Social welfare, kind-hearted, selfless, friendship. (III) Kidneys, heart, LIVER, etc. |
|
| 1065. |
In the following circuit A, B and C are three ammeters. 0.5A current is shown by ammeter B. Find the currents passing through ammeters A and C. |
| Answer» SOLUTION :current PASSING through AMMETER C =1 A. current passing through ammeter A = 1.5 A | |
| 1066. |
The segments of leech are known as |
|
Answer» Metameres |
|
| 1067. |
(a) State the relation between object distance, image at a distance of 30 cm from the mirror when the object is Give the New Cartesian Sign Conventions used. (b) A concave mirror forms a virtual and erect image at a distance of 30 cm from the mirror when the object is held at 10 cm in front of the mirror. Calculate focal length of the mirror. |
|
Answer» SOLUTION :(a) N/A (B) N/A |
|
| 1068. |
Observe the chart 9.1 in your textbook. Observe about the relationship of various factors shown therein with the social health. |
|
Answer» Solution :The relationship of the various factors mentioned in the chart with the social health of a person are as follows : i. Satisfying basic needs of person-food, cloting, shelter, medicines: When the above basic needs or person are satisfied, it helps him or her to live with confidence in the society. Thus, it improves the social health of the individual. ii. Education: Education is necessary for every individual for his better future as well as his self development. An educated person will have a better job to live a respectable life in a society. iii. Financial statue: Every individual requires money to survive in society. Good financial status will help a person to satisfy his basic need and live with pride in the society. iv. Gardnes : Gardnes in the neighbourhood not only make the environment look beacutiful, but also provide a place for recreation for people. Children use the garden and park for playing, adults may walk and stroll in hte park which can help then de-strss. They are also used by adults for interacting with each other. v. Social and physical condition of the surrounding: If the people living in the surrounding area are well MANNERED and well behaved and if the surroundings are clean and well maintained, it creates a positive impact on individuals. vi. Social environment of the surrounding: If the people in the surrounding area live amicably without causing trouble, it makes the ambience more conductive for living. vii. Residential area: Well planned residential areas make living easier and comfortable. viii. Water: Water is one of the basic REQUIREMENTS of a person and must be satisfied for a proper living. ix. Toilets: They are necessary to maintain good hygiene and clean surroundings. Provision of public toilets discourage people from defecating in the open and thus, it prevents spreading of diseases. x. Political conditions (viewa): Political views of people can also affect the livelihood in a particular area. If people from opposite political ideologies stay in the same vicinity, there is a POSSIBILITY of conflict of ideas leading to UNNECESSARY arguments and tensions in the surroundings. xi. Playgrounds: Just like gardens, playgrounds are also important for children and young people. Children can use them to play various sports. Playgrounds are also used for social gatherings and functions. xii. Social treatment: The way people in the local area behave with a particular person also affects his social health. It generally depends upon the extent to which the person interacts with people or is available for the people in the society. xiii. Social safety: This includes the safety of a person from thieves or burglars as well as the support of people during bad times. Social safety is important fo ra person to live without inhibitions in a society. This ensures good social health. xiv. Transport facilties: Proper transport facilities are a necessary requirement for daily commuting of both people and goods. Good roods, ADEQUATE transport vehicles, etc. all help in providing good transport facilities. xv. Education and job opportunities : Education is the right of every citizen. However, providing enough job opportunities to meet the demands of the educated people is also necessary. |
|
| 1069. |
What is the unit of refractive index? |
| Answer» SOLUTION :Refractive index being a RATIO of two SIMILAR QUANTITIES and has no unit. | |
| 1070. |
Joiny Forest management is an example of: |
|
Answer» Political equality |
|
| 1071. |
What is a conductor of electricity ? |
|
Answer» SOLUTION :The material which TRANSFERS change from one PLACE to another place is called a CONDUCTOR. Ex : All METALS. |
|
| 1072. |
The device that shows the average speed of the vehicle is |
|
Answer» SPEEDOMETER |
|
| 1073. |
Which eye defect can be corrected using (i) convex lens and (ii) concave lens ? |
| Answer» SOLUTION :(i) HYPERMETROPIA. (II) MYOPIA. | |
| 1074. |
Why are leucocytes classified as granulocytes and agranulocytes? Name each cell and mention its functions. White blood corpuscles or Leucocytes:(ii) Biofortification may help in removing hidden hunger. How? |
|
Answer» Solution :Based on the presence of granules in the cytoplasm of leucocytes it is classified into two categories. (a) Neutrophils (b) Eosinophils and (c) Basophils (a) Neutrophils: Their numbers are increased during infection and inflammation. (b) Eosinophils: Their number increases during conditions of allergy and parasitic infections. It also brings about detoxification of toxins. (c) Basophils: They RELEASE chemicals during the process of inflammation. (ii) Agranulocytes: Granules are not found in the cytoplasm of these cells. The agranulocytes are of two types: (a) Lymphocytes (b) Monocytes (a) Lymphocytes: They produce antibodies during bacterial and viral infections. (b) Monocytes: They are phagocytic and can engulf bacteria. Biofortification is the SCIENTIFIC process of developing CROP plants enriched with high levels of desirable nutrients like vitamins, proteins and minerals. EG. 1. Protina, Shakti and Rathna are lysine rich maize hybrids 2. Atlas 66, a protein rich wheat variety. 3. Iron rich fortified rice variety. 4. Vitamin A enriched carrots, pumpkin and spinach. By this way, Biofortification may help in REMOVING hidden hunger. |
|
| 1075. |
What substance is obtained as a residue when wood is burned in a limited supply of air ? |
|
Answer» |
|
| 1076. |
What is heating effect of electric current? Find an expression for amount of heat produced. Name some appliances based on heating effect of current. |
|
Answer» Solution :When a current FLOWS through a conducting wire (resistance wire) heat is developed and temperature of wire rises. It is known as the heating effect of electric current. If V be the potential maintained across the ends of a wire then , by DEFINITON, the amount of work done for flow of 1C charge through the wire is V. `therefore` Work done for flow of Q charge W=VQ=VIt where I is the current flowing in time t. `[because Q=It]` As V=IR hence, `W=VIt=(IR)IT=I^2 RT` This work done (i.e., ELECTRICAL energy dissipated) is CONVERTED into heat. hence, the amount of heat produced, `Q=I^2RT` Incandescent lamps, electric iron, electric stove, toaster, geyser, electric room heater etc. are the appliances based on heating effect of electric current. |
|
| 1077. |
What are the two steps of anaerobic respiration? |
| Answer» SOLUTION :GLYCOLYSIS and FERMENTATION are the two steps of anaerobic respiration. | |
| 1078. |
Describe the magnetic field due to current through a circular loop. |
Answer» Solution :The nature of magnetic field due to a current carrying circular coil is as SHOWN in the figure.  The magnetic field lines near the conductor are concentric circles which would become larger and larger as we move away from the wire. At the CENTRE of the circular loop, the arcs of these big circles would appear as straight lines as shown in the figure. The direction of magnetic field can be determined by using the RIGHT hand thumb RULE. The magnetic field due to a circular coil of n turns is n times larger as that produced by a single turn. THis is because the current in each circular turn has the same direction and the field due to each turn then just adds up. |
|
| 1079. |
When an automobile travels for a long distance the air pressure in the tyres increases. Why ? |
| Answer» SOLUTION :Work is DONE against friction. This work done is converted into heat. Temperature rises. `PV=nRT`, As VOLUME of tyre is const. `P PROP T`. | |
| 1080. |
Explain why the water doesn’t fall even at the top of the circle when the bucket full of water is upside down rotating in a vertical circle ? |
| Answer» SOLUTION :WEIGHT of the water and bucket is used up in providing the NECESSARY CENTRIPETAL force at the top of the circle | |
| 1081. |
A horizontal power line carries a current from east to west direction. What is the direction of the magnetic field due to the current in the power line at a point above and at a pointbelow the power line ? |
|
Answer» SOLUTION :According to right-hand THUMB RULE, i] The direction of magnetic field at a point above the power line is form SOUTH to North. II] The direction of magnetic field at a point below the power line is from North to South. |
|
| 1082. |
Two resistors when connected in parallel give the resultant of 2 ohm, but when connected in series the effective resistance becomes 9 ohm ? Calculate the value of each resistance. |
|
Answer» <P> Solution :Resultant resistance of parallel combination `R_(P)=2Omega`Resultant resistance of SERIES combination `R_(S)=9Omega` `(1)/(R_(P))=(1)/(R_(1))+(1)/(R_(2))` `1/2=(1)/(R_(1))+(1)/(R_(2))` `1/2=(R_(1)+R_(2))/(R_(1)R_(2))` `2(R_(1)+R_(2))=R_(1)R_(2)` . . . (1) Substitute equation (2) in equation (1) `R_(S)=R_(1)+R_(2)` `9=R_(1)+R_(2)` `R_(1)=9-R_(2)` . . (2) `2(9-R_(2)+R_(2))=(9-R_(2))R_(2)` `18=9R_(2)-R_(2)^(2)` `R_(2)^(2)-9R_(2)+18=0` `(R_(2)-3)(R_(2)-6)=0` `R_(2)=3,6` (i) If `R_(2)=3,R_(1)=9-R_(2)=9-3` `R_(1)=6` (ii) If `R_(2)=6,R_(1)=9-R_(2)=9-6` `R_(1)=3` |
|
| 1083. |
Pb+CuCl_2 to PbCl_(2) +Cu. the above reaction is an example of |
|
Answer» combination REACTION |
|
| 1084. |
Dentists use concave mirrors for testing teeth |
| Answer» Solution :CONCAVE mirrors are used by dentists because at a short range ( object distances less than the focal LENGTH) they PRODUCE magnified, upright ilnages. It is useful to have a n1agnified image of a tooth when you .re looking for or repairing cavities, cracks, or other ABNORMALITIES. | |
| 1085. |
In the concave reflector of a torch, the bulb is placed : |
|
Answer» between the POLE and FOCUS of reflector |
|
| 1086. |
List two nutrients the slurry left behind in the biogas plant contains |
| Answer» SOLUTION :NITROGEN and PHOSPHOROUS | |
| 1087. |
calculate the molecular mass of CO2. |
|
Answer» Solution :(i) Write the dental formula of rabbit. (ii) With a neat labelled diagram explain the techniques involved in gene CLONING. (i) Dental formula is `(1(2)/(1),C(0)/(0),PM(3)/(2),M(3)/(3))` in Rabbit, which is written as `(2033)/(1023)` I - Incisors PM - Premolar C-Canines M - Molars (ii) Gene cloning The carbon copy or more appropriately, a clone means to make a genetically exact copy of an organism. In gene cloning, a gene or a piece of DNA fragment is inserted into a bacterial cell, where DNA will be multiplied (copied) as the cell DIVIDES. Techniques involved in gene cloning: 1. Isolation of desired DNA fragment by using restriction enzymes. 2. Insertion of the DNA fragment into a suitable vector (plasmid) to make rDNA. 3. Transfer of rDNA into bacterial host cell (Transformation). 4. Selection and MULTIPLICATION of recombinant host cell to get a clone. 5. EXPRESSION of cloned gene in host cell. 
|
|
| 1088. |
In circular motion , the acceleration produced along the radiusis called as ____________. |
| Answer» SOLUTION :CENTRIPETAL ACCELERATION | |
| 1089. |
A hiker stands on the edge of a cliff 490 m above the ground and throwns a stone horiozontally with an initial speed of 15ms^(-1) neglecting air resistance.The time taken by the stone to reach the ground in seconds is (g=9.8ms^(2)) |
|
Answer» Solution :time = 10 seconds `V=SQRT(V_(X)^(2)+V_(y)^(2))=sqrt(15^(2)-98^(2))=99.1m//s^(-1)`. |
|
| 1090. |
Correct the statement : (True or False)(a) Velocity of light is greater in denser medium than in rarer medium.(b)Increase in the converging power of eye lens causes 'hypermetropia'. |
|
Answer» Solution :(a) False. CORRECT Statement : Velocity of LIGHTIS lesser in a denser MEDIUM than in rarer medium. (b) TRUE. |
|
| 1091. |
What are the precautions to be taken by people working in radiation labs ? |
|
Answer» Solution :(i) Radioactive materials should be KEPT in thick walled lead containeer. (ii) Lead coated aprons and lead gloves should be used while working with hazardous radioactive materials. (iii) Avoid eating while handling radioactive materials. (iv) The radioactive materials should be handled only by tongs or by a remote control process. (v) Dosimeters should be WORN by the USERS to CHECK the LEVEL of radiation. |
|
| 1092. |
What happens when 2 mL of acetic acid was added in drops to 5 mL of water? |
| Answer» SOLUTION :When 2 ML of acetic acid was added in drops to 5 mL of water, a clear and HOMOGENEOUS solution was FORMED because acetic acid is soluble in water. | |
| 1093. |
How would you assess or appreciate the role of energy conversion occuring naturally in maintaining ecological balance of nature ? |
|
Answer» Solution :1) The chemical CHANGES in the sun is providing us the heat ENERGY and light energy to the EARTH. 2) The heat energy of the sun evaporates the water into water vapour. This helps us to get heavy rainfall. 3) The solar energy is TAKEN by the plant to change `CO_(2)`, water and chloroplast into starch which is the food of the plant. This process is called photosynthesis. 4) In the photosynthesis process the plant releases `O_(2)` (oxygen). 5)The leguminous (Pea plants) plants help the bacteria present at their roots. In return they help the plants to fix nitrogen in them. The nitrogen cycle is maintained. 6) From the above examples we can understand that the energy conversion is helpful in maintaining ecological balance of nature. |
|
| 1094. |
What do you mean by disaster? Explain in detail |
|
Answer» Solution :i. Disaster: ii. According the United Natiions, disaster is defined as the sudden even that leads to the HUGE loss of life and PROPERTY. iii. Disasters cause unpredicatble TROUBLE to mankind and sudden CHANGES in the environment, thereby damaging it. iv. Disasters cause huge loss to life and property and have long TERM effects on the society. v. Disasters affect various areas of life like economic, social, cultural, political, law and administration etc. vi. Disasters can be long term or short term depending upon the period of disaster. vii. Broadly disasters can be of three types i.e. a. Geophysical disasters b. Biological disasters. c. Man-made disasters. |
|
| 1096. |
What is the main purpose behind the use of a mirror in a solar cooker ? |
| Answer» SOLUTION :Solhr cookers ACHIEVE a higher TEMPERATURE by USING mirrors to FOCUS the rays of the sun. | |
| 1097. |
A light ray is incident fromt a denser medium on the boundary separating it from a rarer medium at an angle of incidence equal to the critical angle. What is the angle of refraction for the ray ? |
|
Answer» |
|
| 1098. |
Nameand state the rulewhichdetermine the directionof magneticfield arounda straightcurent- carrryingconductor . Also draw diagram . |
|
Answer» SOLUTION :Nameof the rule: Right- handthumbrule . This ruleis alsocalled Maxwell .s corkscrew rule . Rule: Imaginethatyou are holdinga current - carryingstraight conductor in your righthand suchthat the thumbpointtwoards the direction of current . Then your finger of righthand wrap aroundthe conductor in the direction hand wrap around the conductorin thedirection of the field LINES of THEMAGNETIC field. THISIS known as the Right - handthumb rule.  .
|
|
| 1099. |
Magnification produced by convex mirror is : |
|
Answer» ALWAYS POSITIVE and GREATER than one |
|
| 1100. |
Differentiate the following BOD and COD |
Answer» Solution : (ii) `{:("S.No.","Aerobic ","ANAEROBIC"),(1.,"Occur in the presence of OXYGEN","Occur in the ABSENCE of oxygen."),(2.,"Carbon dioxide , water and ATP are produced","Lactic acid , ETHANOL and ATP are produced"):}` |
|