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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.
| 58501. |
Why is damage to the ozone layer a cause for concern what steps are being taken to limit this damage |
| Answer» Because of its damage, UV rays can easily reach to us and cause skin cancer and other health problems. To limit it we should prevent the use of CFCs | |
| 58502. |
What is double displcement reactoin |
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Answer» Those reaction in which two compounds exchange their ions to form new two compunds.ex-Agno3+Nacl=Agcl+Nano3 Or ye bhi hai bhai : those reactions in which there is an exchange of ions b/w reactant are called........ Tho☺☺☺☺☺se reaction in which one element take the place of another element in a compound it known as double displacement reaction..... The reaction in which two different ions or group of atoms in the reactant molecules are displaced by each other The reaction in which two compounds react by an exchange of ions to form two new compounds is called double displacement reaction. A type of chemical reaction in which exchange of ions takes place between two compounds |
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| 58503. |
proper defination of genetic drift |
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Answer» Sudden change in the friquency of a perticular genes, to migration, selection ect. Drift in the genetic constitution of an organisms |
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| 58504. |
Defin chipko Angolan |
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Answer» Ishit taneja ... Chipko andolan ke baare me science me bhi h in topic sustainable development page number 272 No Ishit sahi section me pucha hai management wale chapter me hai ye topic Answer |
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| 58505. |
why calcium sulphate hemihydrate is called as plaster of paris |
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Answer» You will live 100 years necha ham aapki baat kar rahe the puja Aree abhi aapke hi bare mei baat kr rhe the puja ji aur aap aa gye, 100 saal jiyoge?? Because plaster of paris is its common name.Just simple as that: Why your name is Sharath. Becoz it contains 1/2 of water of crystallization. Because it was first discovered in paris |
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| 58506. |
NA2CO3.10H2O is wet or not and why |
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Answer» Here with 1 molecule of sodium carbonate has 10 molecules of water which shows it is wet inside. Dry...... becoz 10H2O, is the water molecule present in its crystals,... i.e. water of crystallization For example if you burn pop excessively the watet molecules from that will evaporates and only dead burnt plaster will remains which is not capable of hardening Wet Dry , becoz in that compound water is in molecules which keeps the compound moist |
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| 58507. |
NA2CO3.10H2O is wet or noy |
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Answer» No is not wet Yes it is wet |
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| 58508. |
What is mean by cataract? |
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Answer» Catarct is a defect of eye in which the eye lens becomes whitish and blurry It\'s a defect of eye due to which the image formed on retina appears to be milky and cloudy or u can say it results as a blurred image it can be corrected by surgery........ Defects in eye |
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| 58509. |
the molecule of Na2CO3.10H2O |
| Answer» | |
| 58510. |
What bmeans geographicl isolation. |
| Answer» Geographical isolation means separation of species by physical barriers like water forms, oceans, mountains etc. Geographical isolation just requires single parent. The offspring is just an exact copy of the parent. As there are less chances for variations to oocur, new species are not formed in asexually reproducing individuals undergoing geographic isolation. | |
| 58511. |
Which gland is knows stress gland of the body? |
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Answer» Adrenal Adrenal gland Adrenal gland |
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| 58512. |
What are the working of motor and generator.Discuss in brief? |
| Answer» Change electric energy into mechanical | |
| 58513. |
Difference between baking soda and bleaching powder |
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Answer» When calcium hydroxide react with chlorine then bleecing powder formWhen nacl reacts with water carbindioxide and ammonia then baking soda form Bleaching powder mein bas 1 cheez extra hota hain wo hain tartaric acid |
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| 58514. |
Describe internal structure of human heart |
| Answer» | |
| 58515. |
what is lymp |
| Answer» Lymph is a another type of fluid involve in transportatiin | |
| 58516. |
What is the difference between slip rings and split rings |
| Answer» Slip ring is used in generatorWhile split rings in motor | |
| 58517. |
Why does calcium float on water? |
| Answer» It is because the bubbles of hydrogen bring it on the surface of water and then calcium floats on water | |
| 58518. |
Name the process by which sulphide ores are concentrated. |
| Answer» Roasting | |
| 58519. |
Yess in biology |
| Answer» | |
| 58520. |
Haa biology me |
| Answer» What? | |
| 58521. |
Should the resistance of an ammeter be low or high? Give reason |
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Answer» Low Low because if the resistance of ammeter is high then the value of current will be low as compared to the actual value. Very low High |
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| 58522. |
Explain the mechanism of cleansing action of soaps |
| Answer» Its too long 2 type here....hope yu cn understsnd | |
| 58523. |
how is ozone layer are formed |
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Answer» ozone is a poisonous layer which found in earths atmosphere in . Between 15 to 60km .It protect us from harmful ultraviolet rays which come from sun .When ultraviolet rays falls on earths atmosphere . It breaks oxygen molecule into atoms. 02 ----- 0+0.And then these atoms react with oxgen molecules to form .ozone. 02 + 0 = 03. If there is no ozone layer present in atmosphere. We suffer from many problems like . 1 it cause skin cancer 2 it also damage the eyesby causing an eye disease called cataract. 3 it also damage immune system by lowering the bodys resistance to diseases. //Here it refers to ultraviolet rays /// i hope it is useful for u Apke konse subject complete ho gye science me In atmosphere, some oxygen (O2) absorbed energy from ultraviolet (UV) ray and split to for single oxygen atoms. This oxygen combined with remaining oxygen and form ozone (O3) molecule........... |
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| 58524. |
What is soapless soap |
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Answer» Soap-less soaps" are generally referred to as non-soap cleansers. They differ from regular soap in that they contain synthetic materials rather than the fats or oils used in true soap. ... The soap breaks the surface tension of water and helps bind dirt and grim to that water so you can wash clean. Detergents...hi hai ans Wow..Idk.Maybe scum? Detergents shayad? |
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| 58525. |
Magnet wala chapter kr lia??? |
| Answer» Best of luck | |
| 58526. |
Shrishank can i explain this |
| Answer» | |
| 58527. |
Listen please...definitely one question is coming to your science exam.... |
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Answer» Thoda typing mistake hogai.. The is relished at 1.45 pm... Name roll no etc...?? What??? Ohkay....where\'s the question? |
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| 58528. |
I want noe of science |
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Answer» u should download class 10 offline notes app......it will help u Available on Google nd questions r available on this app too.. |
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| 58529. |
Exlain the role of liver in excretion |
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Answer» Explain ki spelling galat hai??? It helps in the excretion of cholesterol, steroid hormones, vitamins, drugs, and other waste materials through bile. Liver also changes the decomposed haemoglobin pigment into bile pigments called bilirubin and biliverdin........ It helps in removal of unwanted particulate matter from the blood. Liver - The liver\xa0helps in the excretion of cholesterol, steroid hormones, vitamins, drugs, and other waste materials through bile. Urea is formed in the liver by the ornithine cycle. Ammonia - a toxic substance - is quickly changed into urea in the liver and thence eliminated from the body. Liver also changes the decomposed haemoglobin pigment into bile pigments called bilirubin and biliverdin. |
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| 58530. |
Difference between salavary analysis and trypsin |
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Answer» Pepsin in presence of hcl converts into pepsinogen and helps in the digestion of protein pepsin is an enzyme which acts only in acidic medium ,trypsine is an enzyme which acts in alkaline medium. Pepsin is an enzyme released by gastric juices present in gastric glands, it also acts on proteins.. Plzz also define me pepsin Salivary amylase is a enzyme released by salivary gland which acts on carbohydrates whereas trypsin is an enzyme released by pancreatic juice which acts upon proteins. Salivary amylase is an enzyme that acts on the raw form of carbohydrates, starch. It is produced in mouth......... Tyrpsin is the enzyme secreted by pancreas and thrown into the small intestine is in its inactive form trypsinogen. This trypsin acts on partially digested proteins......... Salivary amylase is starch digesting enzyme which breaks starch into maltose.While trypsin present in pancreatic juice digests protein |
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| 58531. |
How washing soda is obtained?? |
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Answer» Ya plz refer to ncert,.. vrna google baba It\'s quite long.. Ncert me steps given hai.. Plz refer ncert.. Washing soda is obtained by recrystallization of sodium |
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| 58532. |
Kokon shadhi karega |
| Answer» | |
| 58533. |
How to pass science exam |
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Answer» Koi ek book asha sae kar lo u got passing marks Agar passing marks lane h to 16 me se koi 6 chapters acche se prepare kro.. ? Study karke |
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| 58534. |
Give the chemical formula for calcium hydroxide by the criss cross formula |
| Answer» Valency of Calcium is 2+\xa0Valency of Hydroxide is 1-\xa0it can be represent as Ca2+ OH1-\xa0Interchange the valency\xa0Therefore formula of Calcium Hydroxide is Ca(OH)2. | |
| 58535. |
Is Ncert book sufficient for the board exam |
| Answer» Ofcourse | |
| 58536. |
How food transport in plants |
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Answer» By phloem tube By phloem |
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| 58537. |
Different b/w metal and non metal? |
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Answer» Metals are the electropositive elements which loose electrons to complete their octet Non metals are the electro negetive element which gains electrons | BASIS FOR COMPARISON | METALS | NON-METALS | \t\t\tMeaningMetals refers to the natural elements that are hard, shiny, opaque and dense.Non-metals implies those chemical substances that are soft, non-shiny, transparent and brittle.NatureElectropositiveElectronegativeStructureCrystallineAmorphicPhysical State at room temperatureSolid (except mercury and gallium)Solid or gas (except Bromine)DensityHigh densityLow densityAppearanceLustrousNon-lustrousHardnessMost metals are hard, except sodium.Most metals are soft, except diamond.MalleabilityMalleableNon-malleableDuctilityDuctileNon-ductileSonorousSonorousNon-sonorousConductionGood conductor of heat and electricityPoor conductor of heat and electricityMelting and Boiling pointVery high melting and boiling point.Low melting and boiling point.Electrons1 to 3 electrons in the outer shell.4 to 8 electrons in the outer shell.OxygenReact with oxygen and form basic oxides.React with oxygen and form acidic oxides.AcidReact with acids and produce hydrogen gas.Do not usually react with acid\t|
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| 58538. |
Yrr section E kaha se aata hai |
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Answer» Practucal based questions especiall jo Ncert book ke experiments se aate hain Lab manual se Experiments me se aate hai kya |
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| 58539. |
What is amphoterric oxide? |
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Answer» The oxides which shows the property of both basic oxide as well as acidic oxide.Ex zinc and aluminium The metal oxide which react with both acids as well as base to produce salt and water are known as amphoteric oxide. |
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| 58540. |
Why did mendel choose pea plant for his experiment |
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Answer» Because pea plant is easily gronable Because pea plant is found everywhere., grown everywhere, ......and Because of height, flower type, seed colour,coat....easy cross polination and fertilization.. Because he is a lwyer |
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| 58541. |
What is the diffrence between electron dot structure and covalant bonding |
| Answer» In ionic compounds, electrons r actually transferred to form positive nd negative ions which r attracted towards each other due to opposite charges....bt in covalent bonding, electrons r not transferred bt shared . Shared pair of electrons belong to both the atoms nd help them in achieving noble gas configuration...hence no charged ions r formed | |
| 58542. |
If angle i equel angle e so how to get the value of angle r |
| Answer» By using refractive index formula | |
| 58543. |
Why soap is not suitable for washing cloth when water is hard |
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Answer» Because soap molecules react with calcium and magnesiun ions of hard water to form insoluble precipitate and a lot of soap is wasted No . ,,,, detergent is used for hard water not soap |
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| 58544. |
Why carbon is a tetravalent |
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Answer» Because carbon has 4 valanced electrons in its outer most shell . It has 4 electrons in outermost shell |
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| 58545. |
What the next homologue of each of the following (1) C⁴H8 (2) C5H8 |
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Answer» 1 C5H102 C6H10 C5 H10,C6H10 |
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| 58546. |
What do you think noble gas placed in a separate group? |
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Answer» Yes beacuse their vallency shell is fully complete Yes |
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| 58547. |
Why respiration is called exothermic reaction ? |
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Answer» Respiration is called exothermic because large amount of energy is released out. Glucose in presence of oxygen break into carbon dioxide, water and energy is released Respiration is called an exothermic reaction because during respiration ,breaking down of food in the presence of oxygen occur with release of energy |
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| 58548. |
What are the limitation of new landslaw of octaves? |
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Answer» Limitation such as. Law of octaves don\'t follow the law after Ca.In newland periodic table there no place for future element. In one spot he placed two element Applicable only upto calcium and properties of new element could not fit in it and in some cases properties of element were not same. Ex- iron was placed far away from cobalt and nickel The classification did not include elaments beyond atomic weight 40 |
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| 58549. |
Valence electrons |
| Answer» No.of electrons in the last shell known as valence electrons. | |
| 58550. |
What are the property of magnetic line force? |
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Answer» They originate from North Pole to south Pole.. It is concentrated at poles.. They r closed continues curves..it never intersects.... *they always go frm north to south... *they never intersect each other... *they are closed continuous curves..... |
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