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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.
| 5801. |
Your brother studying in XII has developed strees. |
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Answer» Solution :(i) Competition has increased in education, employment and BUSINESS due to increaseing POPULATION. (ii) As expressing feeling helps to relieve stress, I, along with my parents will help my BROTHER to relieve his stress by talking and discussing with him. (iii) I will also help him by giving him suggestions about ways to cope up with studies and help him with timw management. (iv) I will advisehim to go forregular exercise, yoga and meditation to improve his concentration and relieve stress. (v) I will explanin him the importance of balanced diet and food to relieve stress. Also, I will advise him to take regular breaks form studires and surture and HOBBY which will help him to relieve stress and concentrate BETTER in studies. |
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| 5802. |
Cybercrime |
| Answer» Solution :Criminal ACTIVITIES carried out by means of COMPUTER or the INTERNET is called cybercrime. | |
| 5803. |
For which of the following substances, resistance decreases with increase in temperature? |
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Answer» Copper |
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| 5804. |
Define isomerism. Draw all possible isomers of butane. |
Answer» SOLUTION :Compounds having the same molecular FORMULA but different structures and PROPERTIES are called isomers. This phenomenon is called isomerism. Isomers of BUTANE are
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| 5805. |
Define curie. |
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Answer» Solution :It is DEFINED as the quantity of a radioactive SUBSTANCE which undergoes `3.7 xx 10^(10)` disintegrations in one second. This is actually close to the activity of 1 g of radium 226. `"Curie" =3.7 xx 10^(10)` disintegrations PER second, |
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| 5806. |
Velocity of light is greater in denser medium than in rarer medium. |
| Answer» SOLUTION :CORRECT Statement : Velocity of light is lesser in a denser MEDIUM than in RARER medium | |
| 5807. |
TESTIS |
| Answer» SOLUTION :PRODUCTION of SPERMS and MALE hormone-testosterone. | |
| 5808. |
A cube has a side of length 1.2xx10^(-2)m. Calculate its volume |
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Answer» `1.7xx10^(-6)m^(3)` |
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| 5809. |
Give three examples of physical problems arising due to excessive use of mobile phones. |
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Answer» Solution :Some of the effects of excessive and irrational use of internet and mobile phones include the following : i. Person using mobile PHONE for a long time remains unaware of his or he surroundings. ii. The radiation of mobile phones causes several problems LIKE tiredness, headache, insomnia, forgetfulness, tinnitus headache, insomnia, forgetrfulness, tinnius (buzzing in the ears), jont PAINS as well as problems in VISION. iii. The rations afect children more than adults. iv. Also, continuous use of camputers and internet makes a person solitary and incapable to establish harmonious relations with relatives and other members of the society. v. Such habits further make a person self-centred in nature and thereby lead to problems like selfishness. vi. The person tands to beome LESS sensitive towards others and the long term effect of such tendency is that he stops helping others and is also not helped by other people when needed. |
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| 5810. |
What causes the opening and closing of guard cells of stomata during transpiration? |
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Answer» Solution :(a) Allosomes are CHROMOSOMES which which are responsible for determining the sex of an individual. Theere are two types of sex chromosomes. X and Y chromosomes. Human male have one X chromosome and one Y chromosomes and the human female have two X chromosomes. (b) The opening and closing of stomata is DUE to the change in turgidity of the guard cells. When the water enters into the guard cells, they become TURGID and the stomata OPEN. When guard cells lose water, it becomes flaccid and the stoma closes. |
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| 5811. |
The weight of an object on the Earth is ________________ times its weight on the Moon. |
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Answer» |
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| 5812. |
Misuse or ilegal sale of the written literature, softwere, photos, videos, etc. of others by obtaining from internal. |
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Answer» |
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| 5813. |
Potential difference (voltage) measuring device : Voltmeter :: Current measuring device : ___________ |
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Answer» SOLUTION :AMMETER Voltmeter measures the potential DIFFERENCE (voltage). Similarly, ammeter measures the current. |
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| 5814. |
Reproduction is the process by which the living species continues its existence. Lower organisms carry out asexual reproduction while higher plants and animals always show sexual reproduction. Plants reproduce asexually by methos such as fragmentation, vegetative propagation, budding spore formation. For sexual reproduction they form gametes. In animal kingdom, budding fission of different types and parthenogenesis are some of the methods that do not require both the sexes. Though regeneration also forms new individual, it is not considered to be a reproductive process because, basically it is a repair process. The ability to regenerate is lost in higher phyla. In human beings it is restricted only to wound healing. Sexual reproduction is also undergoing lots of experimentation such as cloning which may make females capable of producing their own baby without intervention of any male. How do living species continue their existence ? |
| Answer» SOLUTION :Through the PROCESS of reproduction, LIVING species CONTINUE their EXISTENCE. | |
| 5815. |
Reproduction is the process by which the living species continues its existence. Lower organisms carry out asexual reproduction while higher plants and animals always show sexual reproduction. Plants reproduce asexually by methos such as fragmentation, vegetative propagation, budding spore formation. For sexual reproduction they form gametes. In animal kingdom, budding fission of different types and parthenogenesis are some of the methods that do not require both the sexes. Though regeneration also forms new individual, it is not considered to be a reproductive process because, basically it is a repair process. The ability to regenerate is lost in higher phyla. In human beings it is restricted only to wound healing. Sexual reproduction is also undergoing lots of experimentation such as cloning which may make females capable of producing their own baby without intervention of any male. Which are asexual methods of reproduction in kingdom Animalia? |
| Answer» SOLUTION :Fission, BUDDING and parthenogenesis are the ASEXUAL methods of reproduction in KINGDOM Animalia. | |
| 5816. |
Two lenses of power +3.5 D and -1.5 D are placed in contact. What is the power and focal length of the combination ? If an object be placed at a distance of 0.8 m from the lens combination, where is the image formed ? |
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Answer» Solution :It given that `P_(1) = + 3.5 D, P_(2) = - 1.5 D` `therefore` of the combination `P = P_(1) + P_(2) = (+3.5 - 1.5) D = + 2.0`D `therefore` FOCAL length of the combination `f = (1)/(P) = (1)/(+2.0 D) = + 0.5`m As distance of OBJECT from the lens combination u = - 0.8 m, hence using lens formula `(1)/(v) - (1)/(u) = (1)/(f)`, we have `(1)/(v) = (1)/(u) + (1)/(f) = (1)/((-0.8)) + (1)/((+0.5)) = (-0.5 + 0.8)/(0.8 xx 0.5) = (0.3)/(0.8 xx 0.5) rArr v = (0.8 xx 0.5)/(0.3) = + 1.33` m |
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| 5817. |
How is washing soda prepared from sodium carbonate ? Give its chemical equation. State the type of this salt. Name the type of hardness of water which can be removed by it ? |
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Answer» SOLUTION : • By recrystallisation of sodium carbonate. `Na_2CO_3 + 10H_2Orarrunderset("WASHING SODA")(Na_2CO_3"."10H_2O)` • It is a basic salt. • Permanent hardness of WATER can be removed. |
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| 5818. |
The second focal point is located at ………………… of a human eye. |
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Answer» RETINA |
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| 5819. |
A large number of electrical appliances connected in a circuit can be operated together |
| Answer» SOLUTION :False. REASON : A large number of electrical appliances CONNECTED in a CIRCUIT can not be operated together. If operated will cause OVERLOADING | |
| 5820. |
Explain why the planets do not twinkle. |
| Answer» SOLUTION :Refraction is not NOTICEABLE due to the small variation in the BRIGHTNESS of light coming from the planet. Thus, PLANETS do not appear to twinkle. | |
| 5821. |
What happens if a current carrying conductor is placed in the magnetic field? |
| Answer» Solution :The conductor EXPERIENCES a FORCE and the direction of this force is given by Fleming.s LEFT hand RULE. | |
| 5822. |
A compass needle is placed near a cunent-carrying wire. State your observation for the following cases, and give reason for the same in each case : |
| Answer» SOLUTION :DEFLECTION of compass needle INCREASES. Magnetic FIELD strength is DIRECTLY proportional to the amount of current. | |
| 5824. |
What are the harmful effect of alcoholism ? |
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Answer» Solution :1. Liquor is produced from alcohol obtained through fermentation of substances. 2. However if this process is performed in a wrong way, poisonous liquor is produced which proves fatal for many at times. 3. Efficiency of nervous system (especially brain) and LIVER as well as lifespan of person decreases due to alcoholism. 4. Brain development in adolescents gest hindered due to alcoholism and thereby ability of memorization and learning becomes slow. 5. ADDICTIVE person will not able to think rationally. 6. Due to this, the person has to face SOCIAL, mental and familial ILLNESS along with physical illness. |
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| 5825. |
Statethe effect on thestrength of the magneticfieldproducedat a point near a straightconductor if the electric current flowingthrough it increases . |
| Answer» SOLUTION :The strenghtof themagneticfieldincreases | |
| 5826. |
Which of the following colours is scattered minimum? |
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Answer» Violet |
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| 5827. |
Theplantwhichpropagateswiththe helpofitsleavesis _______. |
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Answer» Onion |
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| 5828. |
(a) What is meant by far point of human eye ? (b) What is meant by near point of human eye ? |
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Answer» Solution :(a) FAR point of a human EYE is a point at fathest distance from the eye, at which an object can be SEEN clearly by the eye. (b) NEAR point of human eye is a point at point at shortest distance from the eye at which an object can be seen clearly by the eye. |
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| 5829. |
An impulse is applied to a moving object with a force at an angle of 20^@ w.r.t. velocity vector, what is the angle between the impulse vector and change in momentum vector ? |
| Answer» SOLUTION :Impulse and change in momentum are along the same direction. THEREFORE ANGLE between these two VECTORS is zero. | |
| 5830. |
Energy obtained from nuclear fission is eco-friendly because it doesn't pollute the air. Do you agree with the above statement?Why? Why not? |
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Answer» |
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| 5831. |
What is meant by presistence of vision ? |
| Answer» Solution :The impression of an object seen by the eye presists on the retina for `(1)/(16) TH` of a SECOND, even after the object in removed. If another object is seen before `(1)/(16) SEC`, the impressions of the two merge to give us the sensation of continuity. This property of eye is called persistence of VISION. | |
| 5832. |
Fill in the blanks to complete the following sentence: Q: When light travels from a rarer to a denser medium, its speed _____ |
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| 5833. |
Reproduction is the process by which the living species continues its existence. Lower organisms carry out asexual reproduction while higher plants and animals always show sexual reproduction. Plants reproduce asexually by methos such as fragmentation, vegetative propagation, budding spore formation. For sexual reproduction they form gametes. In animal kingdom, budding fission of different types and parthenogenesis are some of the methods that do not require both the sexes. Though regeneration also forms new individual, it is not considered to be a reproductive process because, basically it is a repair process. The ability to regenerate is lost in higher phyla. In human beings it is restricted only to wound healing. Sexual reproduction is also undergoing lots of experimentation such as cloning which may make females capable of producing their own baby without intervention of any male. Why is regeneration not true method of reproduction? |
| Answer» SOLUTION :Regeneration is the REPAIR process than a REPRODUCTIVE process. It is not DONE with the intention of producing OFFSPRING, but is for healing or repairing the lost part. | |
| 5834. |
Reproduction is the process by which the living species continues its existence. Lower organisms carry out asexual reproduction while higher plants and animals always show sexual reproduction. Plants reproduce asexually by methos such as fragmentation, vegetative propagation, budding spore formation. For sexual reproduction they form gametes. In animal kingdom, budding fission of different types and parthenogenesis are some of the methods that do not require both the sexes. Though regeneration also forms new individual, it is not considered to be a reproductive process because, basically it is a repair process. The ability to regenerate is lost in higher phyla. In human beings it is restricted only to wound healing. Sexual reproduction is also undergoing lots of experimentation such as cloning which may make females capable of producing their own baby without intervention of any male. What are methods of reproduction in plants? |
| Answer» Solution :Plants reproduce by ASEXUAL as well as sexual methods. Asexual reproduction is by fragmentation, vegetantive PROPAGATION, budding, SPORE formation, while by formation of gametes, sexual reproduction is done. | |
| 5835. |
Between which two points related to a concave mirror should be placed to obtain on a screen an image twice the size of the object? |
| Answer» Solution :An object should be PLACED between CENTRE of CURVATURE and the principal FOCUS. | |
| 5836. |
Reproduction is the process by which the living species continues its existence. Lower organisms carry out asexual reproduction while higher plants and animals always show sexual reproduction. Plants reproduce asexually by methos such as fragmentation, vegetative propagation, budding spore formation. For sexual reproduction they form gametes. In animal kingdom, budding fission of different types and parthenogenesis are some of the methods that do not require both the sexes. Though regeneration also forms new individual, it is not considered to be a reproductive process because, basically it is a repair process. The ability to regenerate is lost in higher phyla. In human beings it is restricted only to wound healing. Sexual reproduction is also undergoing lots of experimentation such as cloning which may make females capable of producing their own baby without intervention of any male. What is the modern method of reprodaction aimed at in higher organisms? |
| Answer» SOLUTION :CLONING is the MODERN method of reproduction by which production of YOUNG one can be AIMED at. | |
| 5837. |
What is the value of refractive index of air? |
| Answer» SOLUTION :The REFRACTIVE INDEX of AIR is 1 | |
| 5838. |
5.74 g of a substance occupies 1.2 cm^3. Express its density keeping significant figures in view. |
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Answer» SOLUTION :Density = `("Mass")/("Volume")=(5.74)/(1.2)=4.783g//cm^(3)` Here least SIGNIFICANT FIGURE is 2, so density = `4.8g//cm^(3)` |
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| 5839. |
A boy mass 40 kg climbs up the stairs and reaches the roof at a height 8 m in 5 s. Calculate : (i)the force of gravity acting the boy . (ii) the work done by against the force of gravity . (iii)the power spent by the boy . (Take g=10 m S^(-2)) |
| Answer» Solution :(i) 400 N (II)3200 J (iii) 640 W | |
| 5841. |
Define nuclear fission giving one example. |
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Answer» Solution :It was discovered by Hahn in 1983 that when a heavy nucleus is bombarded with neutrons, it splits up into two PARTS of nearly same size and there is a release of large AMOUNT same size and there is a release of large amount of energy. This process is called nuclear fission. When a slow neutron collides with `._(92)^(235)U`, it is CAPTURED by the nucleus. The nucleus becomes unstable and breaks up into two roughly equal parts. `._(92)^(235)U + ._(0)^(1)n rarr ._(56)^(139)Ba + ._(36)^(94)Kr + 3._(0)^(1)n + "Energy"` ...(i) Mass of products formed is less than the initial mass, the lost mass `(Delta m)` is CONVERTED into energy according to Einstein.s mass energy relations `E = rarr Delta m c^(2)` Energy emitted in above reaction [equation (i)] is nearly 200 MeV. |
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| 5842. |
Light enters from air into diamond which has a refractive index of 2.42. Calculate the speed of light in diamond. The speed of light in air is 3.0 xx 10^(8) ms^(-1). |
| Answer» SOLUTION :`1.24 xx 10^(8)ms^(-1)` | |
| 5843. |
The satellites revolving in high earth orbit caJled as geosynchronous satellites. Justify the statement. |
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Answer» SOLUTION :1. If the satellite is revolving in an orbit parallel to the equator, the time of revolution for the earth around itself and that for the satellite to revolve around the earth is the same which MAKES the satellite APPEAR to be STATIONARY with respect to the earth. 2. Therefore, the satellites revolving in high earth orbits are CALLED as geosynchronoussatellites. |
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| 5844. |
the Si unit for the average velocity is |
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Answer» m/s |
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| 5845. |
The diagram alongside shows the refraction of a ray of light from air to a liquid. (a) Write the values of (i) angle of incidence, and (ii) angle of refraction. (b) Use snell's law to find the refractive index of liquid with respect to air. |
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Answer» |
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| 5846. |
State one advantage of harnessing energy from the sea [or oceans ]. |
| Answer» SOLUTION :The energy harnessed from the SEA or oceans does not causee POLLUTION. | |
| 5847. |
Calculate the resistance of the wire using the graph. |
Answer» SOLUTION : `R=(V)/(I) R = (2)/(0.1)= 20 OMEGA` |
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| 5848. |
Name the quantity which is measured in (a) kWh (b)kW (c )Wh (d)eV |
| Answer» SOLUTION :(a)ENERGY ,(B)POWER ,(C )Energy ,(d)Energy | |
| 5849. |
The objects at rest suddenly explodes into three parts with the mass ratio 2:1:1. The parts of equal masses moves at right angles to each other with equal speeds. The speed of the third part after the explosion will be |
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Answer» 2v `p_(1)=SQRT((mv)^(2)+(mv)^(2))=sqrt2mv` ut `v^1 `= speed of third part of mass 2 m Acc. to Law of conservation of momentum `(2 cancel(m)) v^(1)=sqrt2 cancel(m) v` `v^(1)=(sqrt2v)/(2)=v/sqrt2`. |
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| 5850. |
Casparian strips are present in the _________of the root. |
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Answer» Cortex |
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