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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.
| 66001. |
Explain and write chemical equation for obtaining copper from its sulphide ore in nature. |
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Answer» Copper is a less reactive metal which is quite low in the reactivity series. It can be extracted just by heating its sulphide ore in air. 2Cu2S+3O2------------------>2CuO+2SO2................... 2Cu2O +Cu2S ----------------> 6Cu+SO2. Copper is a metal that is placed for below in the reactivity series it can be extracted from its sulphide Ore with heating strongly also roasting a Method can also be used and electrolytic refining can also be used but heating is the most primitive and easy method equation areCU2S---->CUO+SO2 |
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| 66002. |
How does the resistance of a wire vary with its area of cross-section? |
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Answer» As area is inversely proportional to the resistence....More the area less will be the resistenceLess the area more will be the resistence. Thanks to you both Resistance is inversely proportional to area of cross section. larger will be the area lower will be the resistance and vice versa. As resistivity increases area decreases and as area increases, resistivity decrease..R ∝ 1/AThis is because through a conductor with large area of cross section current can easily flow and hence resistance is low. It is inversely proportional to the area of cross section of the wire. The more the area of cross section of the wire,the less is the resistance and the less the area,the more is the resistance. |
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| 66003. |
Why the bottom of tank filled with water is appeared to be raised???? |
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Answer» The bottom appears raised for the same reason that a pencil / spoon appears bent in a glass of water. This occurs due to a phenomenon called REFRACTION. Air and water, both are mediums. The later being denser. As light passes from a thinner to a denser medium or vice versa, it bends. This creates the illusion of raised bottom, bent objets etc. Because of refraction |
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| 66004. |
State the laws of inheritance formulated by Mendel |
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Answer» Law of Dominance: This is also called as Mendel’s first law of inheritance. According to the law of dominance, hybrid offsprings will only inherit the dominant trait in the phenotype. The alleles that are suppressed are called as the recessive traits while the alleles that determine the trait are known as the dormant traits.Law of Independent Assortment: Also known as Mendel’s second law of inheritance, the law of independent assortment states that a pair of trait segregates independently from another pair during gamete formation. As the individual heredity factors assort independently, different traits get equal opportunity to occur together.Law of Segregation: The law of segregation states that during the production of gametes, two copies of each hereditary factor segregate so that offspring acquire one factor from each parent. In other words, allele (alternative form of the gene) pairs segregate during the formation of gamete and re-unite randomly during fertilization. This is also known as Mendel’s third law of inheritance. Law of dominance ,law of segregation , law of independent assortment |
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| 66005. |
What are covalent bonds |
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Answer» A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding Compound which is formed by the sharing of electron is called covalent compound A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding. |
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| 66006. |
What is meant by magnetic field |
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Answer» The area around the magnet where its presence can be experienced is called magnetic field Magnetic field is the region around a magnet in which its influence can be detected. |
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| 66007. |
define antacid |
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Answer» An antacid is a substance which neutralizes stomach acidity and is used to relieve heartburn, indigestion or an upset stomach It is basically used for treatment of acidity it is made up of mild bases |
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| 66008. |
What is meant by exothermic reaction |
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Answer» In this type of reaction heat is evolved or genrate vigrously The reaction in which heat is produced is known as exothermic reaction. Eg:Respiration |
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| 66009. |
What is thermite which mettal use to join |
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Answer» The osidation of metal oxide by aluminium metal to obtain pure metal is known as thermite reaction this is known as thermite reaction because large amount of heat energy is evovled in thhis reacrion. Aluminium metal is used to join the broken pieces of iron metal Thermite is a pyrotechnic composition of metal which is used as a fuel |
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| 66010. |
Which subject firstly start for better marks |
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Answer» Hindi and english is an scoring subjects Which is easy for u No one |
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| 66011. |
Why valves are needed in human heart. Define lymph and write it\'s function |
| Answer» Lymph helps in fight against germs and hepl in transfer of protein fats | |
| 66012. |
What happen if we add water in strong acids |
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Answer» Wo weak thodi hoga wo toh dilute ho jayega It became a weakacid then before Blast!! They become weak acid |
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| 66013. |
Write photosynthesis reaction and its important steps? |
| Answer» 6CO2+6H2O-------->C6H12O6 +6O2 arrow me sunlight and chlorophyll | |
| 66014. |
What is formula for baking soda bleaching powder ??? |
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Answer» Baking soda is NaHCO3 and bleaching powder CaOCL2 Baking soda =NaHCo3 and Bleaching powder =CaOCl2 Baking soda NaHCO3. |
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| 66015. |
What can be the colour in which rate of photosynthesis is minimum? |
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Answer» Red light And max. In...? Photosynthesis is minimum in green light. Btao n yr |
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| 66016. |
An electric bulb is rated 220V-100W. If it is operated at 110V then how much power is consume by it. |
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Answer» Potential difference= 220vPower=100wWe know that,Power= potential difference x current100=220xcurrentCurrent =220divide by 100=11/5Now, New p.d.=110vPower=110x5/11 =25wIs it ok now??? Yes tushar singh you are wright ans is 50w 25w is correct answer but please send your whole answer with statement Phir kya he crct answer shyd meri calculating me mistake ho gai ho??? Amisha sharma Sorry but this answer is wrong 50w |
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| 66017. |
Human eye and metal and non metal are our syllabus or not? |
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Answer» Yes, this chapters is our syllabusWe.have to resd it... Ya they are |
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| 66018. |
Why is molecular movement necessary for us? |
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| 66019. |
what is the function of pollen grain? |
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Answer» Gaurav jiplants me bhi sexual reproduction hota h kyuki unme male aur female dono gamets present hote h Help in asexual reproduction Pollen grain fuse with tha female gamets prsent in ovule this fusion of germ cell give zygote wich is capable of growing into a new plant. |
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| 66020. |
gm everyone?? what happen to the ovule and ovary after fertilisation?? |
| Answer» It make a seed | |
| 66021. |
Why mendal chose pea plant??? |
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Answer» Mendel chose a pea plant because 1.It has a variety of traits( 7 different traits). 2 . it is a self pollinating plant. 3.It has a very short time span of reproduction. Because the pea plant have variations And this plant grows earlier...... Because it grows earlyer and it is bisexual plant. |
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| 66022. |
What is nafron |
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Answer» Each kidney has a large number of filtration units called nephroon Nephron is a functional unit of kidney consisting of glomerulas and tubules NEPHRON is used to reavsorb the useful substances like glucose ,amino acid .... |
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| 66023. |
Why is valency of iron 2 as well as 3 |
| Answer» So, iron having atomic number 26. It has two electrons in its 4s orbital and 6 electrons in its 4d orbital. In order to attain stability it looses it two electrons in the 4s orbital and hence have +2 valency and since the half filled orbitals are more stable it loses one more electron from d orbital and has +3 valency. | |
| 66024. |
Why planet not twinkle |
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Answer» Thanks for the ans The planets are much closer to the earth, and are thus seen as extended sources. If we consider a planet as a collection of a large number of point-sized sources of light, the total variation in the amount of light entering our eye from all the individual point-sized sources will average out to zero, thereby nullifying the twinkling effect. Hence, the planets do not twinkle |
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| 66025. |
Why did planets do not twinkle |
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Answer» The planets are much closer to earth,and thus seen as extended souces. If we conider a planet a large no. Of point -sized souces of light,the total variation in the amount of light entering our eye from all the individual point -sized sources will average out to zero, thereby nulliyfing the twinkling effect. The planets are much closer to the earth, and are thus seen as extended sources. If we consider a planet as a collection of a large number of point-sized sources of light, the total variation in the amount of light entering our eye from all the individual point-sized sources will average out to zero, thereby nullifying the twinkling effect. Hence, the planets do not twinkle |
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| 66026. |
Difference between nervous system and hormone system |
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| Answer» | BASIS FOR COMPARISON | NERVOUS SYSTEM | ENDOCRINE(Hormone) SYSTEM | \t\t\tDefinitionThe complicated network of nerves that carry messages or signals from and to the spinal cord and brain to other parts of the body.The collection of glands, which produces hormones, function in regulating the body\'s growth and development, metabolism, tissue function, reproduction, sleep, anger, emotions and other internal functions. They work in sending signals to various parts of the body with the help of hormones and act as the chemical messenger.The rate of responseThe nervous system shows the quick response to the stimuli, by the action potentials and neurotransmitters.The endocrine system responds slowly by secreting hormones, traveling through the circulatory system to the target tissue.\xa0Kind of responseLocalised response.The response is spread widely.Duration of responseTemporary and reversible.Permanent response.Mode of transmission of signalNeurotransmitters along neurons transmit electrochemical signals.Hormones are the kind of chemical signals used to transmit the signal to the target tissue through the blood stream of other body fluid.Signals are transmitted byThe neurons.The hormones flow through the blood stream or other body fluid.\t|
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| 66027. |
What is the coliform bacteria? |
| Answer» They are a group of bacteria found in human intestines and the presence of this bacteria in water indicates pollution and contamination of diseases. | |
| 66028. |
Tell the enzymes is secret by small intestine. |
| Answer» trypsin, chymotrypsin, carboxypeptidase, aminopeptidase and dipeptidase. | |
| 66029. |
What do you mean by petroleum |
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Answer» Petroleum as a source of energy should be minimised, renewable source of energy like solar power , hydropower , wind power, tidal energy, ect .., should be used . It is a better to walk over a short distence rather than going by car or scooter. A thick, flammable, yellow-to-black mixture of gaseous, liquid, and solid hydrocarbons that occurs naturally beneath the earth\'s surface, can be separated into fractions including natural gas, gasoline, naphtha, kerosene, fuel and lubricating oils, paraffin wax, and asphalt and is used as raw material for a wide variety of derivative products |
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| 66030. |
Double circulation in human being. Why is it necessary |
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Answer» You are very intelligence student yogita... During a single cycle blood goes twice in the heart which is known as double circulation. It is necessary in human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature. |
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| 66031. |
Life process chapter ka revision notes |
| Answer» You can see the notes in this website. | |
| 66032. |
Give an example of a which cotains both stamens and carpels |
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Answer» Hibiacus and mustard Hybiscus and musturd Hibiscus |
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| 66033. |
What is weak and strong acid, please explain clearly |
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Answer» Divya yadav in which schoolyou studing All mineral acids are strong acids.For eg hydrochloric acid ,sulphuric acid.All organic acid are weak acids.For eg citric acid, tartaric acid. |
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| 66034. |
Describe reproduction by spores in rhizopus |
| Answer» when a slice of bread is kept in moist dark place for a few days spores of rhizopus present in settle on the bread to form New fungus plants of rhizopus.Rhizopus consists of fine Threads like projections called hyphae. It has a knob like structures which are involved in the reproduction called sporangia containing Spores that develop into new rhizopus | |
| 66035. |
How does plant ocuurs phthosynthessiea |
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Answer» Any other answer related to it which will more easier Because they have the ability to acquire food or energy by converting inorganic substance into organic substance... |
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| 66036. |
Which is the smallest and largest element and even is there any largest element in periodic table |
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| 66037. |
Which sample paper book is best. |
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Answer» Xam idea is best Yes oswaal is best Oswaal , It has all sorts of question Oswaal |
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| 66038. |
Why do we prefer a convex mirror as a rear - view mirror in vehicles? |
| Answer» Because it forms diminished images which creates a wider field of view. | |
| 66039. |
Give some examples for vegetative propitiation |
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Answer» Bryophyllum, Pomegranate, sugarcane Brayofhyllum |
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| 66040. |
On what basis chemical equation balance |
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Answer» 2Mg +O2 = 2MgOThe law of conservation of mass in which mass can neither be created or nor be destroyed. To satisfy the law of conservation of mass.. On the basis of no. Of atoms in reactant and product side |
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| 66041. |
What is mean by biological magnification? |
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Answer» The harmful chemical present in one tropic level like DDT increased in each tropic level known as biological magnification The accumulation of chemicals in the body of higher trophic level is known as........... |
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| 66042. |
What type of not corrode easily |
| Answer» What type of what?? | |
| 66043. |
What is the simplest form of aldehyde? |
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Answer» It\'s formaldehyde Firmaldehyde is the simplest form of aldehyde |
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| 66044. |
I want advantage |
| Answer» Of what | |
| 66045. |
Name of the largest cell |
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Answer» Ostrich egg is the largest cell The largest cell is an ostrich\'s egg. Ostrich egg |
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| 66046. |
What are the differense between myopia and hetromyopia |
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Answer» MYOPIAMyopia is a condition in which the people cannot see objects which are beyond the ‘far point’. Far Point is the point of maximum distance at which the eye lens can form an image on the retina. Myopia is also called as’Near- Sightedness’, in which person cannot see the far objects clearly but can see the near objects clearly. The Myopia can be corrected using Double-Concave lens.EXAMPLE: A student who is unable to see the letters on the classroom board is suffering with Myopia.HYPERMETROPIAHypermetropia is a condition in which the people cannot see objects placed between the ‘Near point’ and the point of least distance of distinct vision. ‘Near Point’ is the point of minimum distance at which the eye forms clear image on retina. Hypermetropia is also called as ‘Far-Sightedness’ because the individual cannot be able to see the near objects clearly, but can see the far objects clearly. The Hypermetropia is corrected using the Double- Convex lens MYOPIA 1. It is short-sightedness. 2. It is caused by elogation of eye ball or by excessive curvature of the eye. HYPERMETROPIA1. It is far-soghtness.2. It is caused by shortning of eye ball or by focal length of the eye len is too long. |
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| 66047. |
Where does the magnetic field of a solenoid is stronger |
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Answer» Inside the solenoid hi h not poles Inside the solenoid nhi ho sakta kya Shardul vinay ans.is right I think everywhere The magnetic field of a solenoid is stronger at its ends. |
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| 66048. |
What is full form of IUPAC |
| Answer» International union of pure and applied chemistry | |
| 66049. |
Why evolution is necessary in our life? |
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Answer» Evolution is important for the existence of life on this earth. In evolution new characteristics are develop in an living organism for survival in the changing climate of earth and hence existence of organism on earth To control heriditary disease |
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| 66050. |
what is acif |
| Answer» If it is acid,So, Acid is a substance which releases Hydronium or Hydrogen ions in an aqueous solution. | |