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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
how industries are classified on the basis of their size explain with the help of examples (3 mark answer) |
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Answer» Answer: INDUSTRIES can be classified on the basis of SIZE, OWNERSHIP and raw materials. It refers to volume of PRODUCTION, number of people employed and the amount of capital invested. ... Compared to large scale industries they USE less amount of capital and technology. For example, basket weaving and pottery. |
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| 2. |
What are racemic mixtures? Discuss their resolution involving the formation of diastereomers. |
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Answer» Answer: In chemistry, a racemic mixture, or racemate (/reɪˈsiːmeɪt, rə-, ˈræsɪmeɪt/), is one that has equal amounts of left- and right-handed enantiomers of a CHIRAL molecule. The first known racemic mixture was racemic acid, which Louis Pasteur found to be a mixture of the two ENANTIOMERIC isomers of tartaric acid.A racemic mixture is a 50:50 mixture of two enantiomers. Separation of racemates into their COMPONENT enantiomers is a process called resolution. Since enantiomers have identical physical PROPERTIES, such as solubility and melting point, resolution is extremely difficult.Hope it helps u.❤❤❤ FOLLOW me ❤❤❤Pls mark as brainliest. ❤❤❤#User don't want too many followers. Just he wants brainliest answers. So, mark as brainliest. xD #Follow the user's followings instead of following the user. xD |
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| 3. |
straight chain alkanes have higher melting point and boiling point as compaire to branched isomeric alkanes. Give reason |
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Answer» Answer: because when straight CHAIN ALKANE have higher melting POINT because they have IONIC bonds |
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| 4. |
If the avagadro's number was 12.044×10²³ ,then what woul be the molar mass of oxygen molecules |
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Answer» Answer: Then the molar mass of O2 will be 64 g. Explanation: The avogrado NUMBER is twice now. Hence, the mass of 1 MOLE of any species will be twice the molar mass. Hence mass of O2 molecules = 2×16×2 = 64 g |
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| 5. |
How does iron react with cotton |
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| 6. |
45. The structure of BF, is(1) planar triangular(2) pyramidal(3) tetrahedral(4) T-shaped |
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Answer» Answer: BF STRUCTURE is PLANAR triangular. Explanation: Hope it helped Mark the BRAINLIST ans with thanks. |
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| 7. |
What happen in condition of reaction between non metal and acid |
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Answer» RXN ha Explanation: Ca + H2SO4 gives us CaSO4 +H2 mark as bralliest |
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| 8. |
37. BF, is(1) electron-deficient compound(2) Lewis base(3) used as rocket fuel(4) ionic compound |
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Answer» IONIC compound mark me as brainliest |
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| 9. |
Explain the pauling method for the determination of ionic radius. |
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Answer» Answer: Pauling has calculated the RADII of the ions on the basis of the observed internuclear distances in four crystals namely NaF,KCl,RbBr and Csl;this calculation named Pauling's method.In each IONIC crystal the cations and ANIONS are ISOELECTRONIC with inert gas configuration |
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| 10. |
What happen when a copper put into dilute hydrochloric acid |
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Answer» Answer: Nothing Explanation: COZ, COPPER is PLACED below hydrogen in METAL activity SERIES. |
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| 11. |
1. Explain the diagonal relationship. |
Answer» In the periodic table, an element of a group in the second period is similar in properties with the element of nextgroup in third period this types of relationship is called diagonal realtionshipHope it helps u♥Mark it brainleist♥ |
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| 12. |
165g of salt is present in 825g of solution calculate the concentration mass of solution |
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Answer» CONCENTRATION=(solute/solution) ×100 therefore concentration=(165/825) ×100 |
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| 13. |
All(c) Write cell reaction and calculate electrical work obtained fromthe following galvanic cell at standard condition :Mg/ Mg2(aq)| Ag+ (aq)| Ag[Given : EºMeZ+/Me = -2- 36 volt & E°A_27/4 = -0.80 volt. ](1+2)=3 |
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Answer» ztjzyk,jgzkhzkgzkgzlyzluzkyzykzyys665xkhxkhxkhxzhkxkhxkhxmhxmhxmhcmhhzkyxludjg×-kgzjtziyskyskysuldkuzukd7odlufkudludkyzkzkyslyzkyz |
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| 14. |
Definition of rolling friction |
Answer» ⭐HELLO BUDDY ⭐Rolling resistance, sometimes called rolling friction or rolling drag, is the force resisting the MOTION when a BODY ROLLS on a surface. It is mainly CAUSED by non-elastic effects; that is, not all the energy needed for deformation of the WHEEL, roadbed, etc. is recovered when the pressure is removed. @.....❤ |
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| 15. |
Name this compound O=CH-CH-CN-C=O-C-OH-OH- -NH2=O |
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Answer» This compound is not POSSIBLE, as i) CN can be on terminals only ii) O can't MAKE three bonds iii) NH2 is ALREADY octet completed at terminals but you have bonded Oxygen with it So make sure you ask about a possible compound |
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| 16. |
Hall and Heroult's process....nocopy paste answer needed from Google..........true chemistry lover give the answer............ |
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Answer» Answer: The Hall–Héroult process is the major INDUSTRIAL process for smelting ALUMINIUM. It involves dissolving aluminium oxide (ALUMINA) (obtained most often from bauxite, aluminium's chief ore, through the Bayer process) in molten CRYOLITE, and electrolysing the molten salt bath, typically in a purpose-built cell. follow me.... |
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| 17. |
Why water show anamolous property at 4 degree celcious |
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Answer» Answer: it expands Explanation: This anomalous expansion of water is an ABNORMAL PROPERTY of water whereby it expands instead of CONTRACTING when the temperature goes from 4°C to 0°C, and it becomes less dense. The density becomes less as it FREEZES because molecules of water normally form open crystal STRUCTURES when in solid form. |
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| 19. |
Which of the following is the best conductor of electricityA) copperB)goldC)silverD)aluminium |
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Answer» SILVER because it contains a higher number of free electrons plzzzzz mark me BRAINLIEST |
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| 20. |
Factors leading to the formation of bond |
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Answer» Answer: I don't know sorry for that |
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| 21. |
Plzzzzzzz solve it sooon |
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Answer» I can't UNDERSTAND sorry |
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| 22. |
① Hydrogen H① Helium - He0 Lithium li① Beryllium be③ Boron - B③ Carbon - copgen |
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Answer» what are you ASKING I don't UNDERSTAND |
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| 23. |
What is azeotropic mixture ?can it be considered as ideal solution? |
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Answer» Answer: An example of ideal SOLUTIONS would be benzene and toluene. Azeotropes fail to conform to this IDEA because, when boiling, the component ratio of unvaporized SOLUTION is EQUAL to that of the vaporized solution. So an azeotrope can be defined as a solution whose vapor has the same COMPOSITION its liquid |
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| 24. |
PresuEvaluate Yourself8) Balance the following equation using oxidation number methodAs, S; + HNO3 + H20 – H,AsO4+H,80,+NOimeСаthe26 |
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Answer» ubwknqjqj very GOOD night uncle passed you MADAM for your TIME in this matter would HNO3 |
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| 25. |
Select the member(s) of group 14 thau(i) forms the most acidic dioxide, (ii) iscommonly found in +2 oxidation state,(iii) used as semiconductor. |
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Answer» i THINK it is helpfull to you |
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| 26. |
Calculate the no.of atom if, 52 moles if HL. |
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Answer» Here is the calculation to the question, =52×6.022×10^23 =313.144×10^23 . . . . . hope this HELPS you please mark as brainliest follow me |
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| 27. |
What is the Taz Trapezium ? what was its result |
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Answer» Answer: Hey mate @!!!!!!! TAJ Trapezium Zone (TTZ) is a DEFINED area of 10,400 sq km around the Taj Mahal to PROTECT the monument from pollution. IT RESULTS IN PROTECTION OF TAJ MAHAL ☺ Hope it's helpful ^_^ |
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| 28. |
How many inches are there in 3 km ? Given ;1km =1000m,1m=1.94 yrd ,1yrd=36 inch. |
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Answer» Answer: SEE the attachment for the answer to your QUESTION. . . . . hope this HELPS you please mark as brainliest follow me |
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| 29. |
Definition of corrosion of metal |
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Answer» The PHENOMENON due to which metals are slowly EATEN away by the reaction of air, water and CHEMICALS present in the atmosphere is CALLED Corrosion. |
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| 30. |
Written notes of ch 3,4 science class 9 |
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| 31. |
Write paragraph on acid rain. |
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Answer» Answer: When HARMFUL gases like sulphur dioxide, nitrogen dioxide REACT with moisture present in air they FORM sulphuric acid and nitric acid when this acid falls on EARTH along with rain it makes rain acedic . This is called acid rain. EFFCTS- 1. Damage crops 2 affects fertility of soil 3 affects aquatic life 4 causes corrosion of buildings and structure and affects PLANTS and humans also Hope this helps Explanation: |
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| 32. |
Write paragraph on petroleum. |
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Answer» Answer: a liquid mixture of hydrocarbons which is present in suitable rock strata and can be extracted and refined to produce fuels including petrol, paraffin, and diesel oil; oil.Petroleum literally means 'rock oil'. The word comes from the Greek word 'petra' (meaning 'rock') and the Latin word 'oleum' (meaning 'oil'). The word petrol is a shortened version of 'petroleum'. Petroleum products are all the substances made from crude oil. Find out about crude oil and its useful products.The liquid MATERIAL used to make asphalt (and what contributes to that offensive smell) is called petroleum. Petroleum is a liquid found deep within the Earth's surface. ... The petroleum you see when you drill down will either flow out as a liquid (oil) or escape into the air as a gas.Petroleum is a term that includes a wide variety of liquid hydrocarbons. Many scientists also INCLUDE natural gas in their definition of petroleum. The most familiar types of petroleum are tar, oil, and natural gas.A FOSSIL fuel, petroleum is formed when large quantities of dead organisms, mostly zooplankton and algae, are buried underneath sedimentary rock and subjected to both intense heat and pressure. Petroleum has mostly been recovered by oil drilling (natural petroleum springs are rare).Gasoline is made from crude oil. The crude oil PUMPED out of the ground is a black liquid called petroleum. This liquid contains hydrocarbons, and the carbon atoms in crude oil link together in chains of DIFFERENT lengths.What are petroleum products, and what is petroleum used for? Petroleum products include transportation fuels, fuel oils for heating and electricity generation, asphalt and road oil, and feedstocks for making the chemicals, plastics, and synthetic materials that are in nearly everything we use. i hope it helpfull to you |
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| 33. |
write the net ionic equation for the reaction of potassium dichromate with sodium sulphide in an acid solution to give chromium III ion and sulphate ion. |
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Answer» Answer: A bug sitting at the POINT (1, 2)(1,2) moves 5 units vertically (PARALLEL to the yy-axis) and 1 units horizontally (parallel to the xx-axis). Which ordered pair gives potential COORDINATES for the bug's NEW location |
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| 34. |
Which is used as hydrogen generators |
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Answer» Answer: Hydrogen generator uses a proton EXCHANGE MEMBRANE (PEM) to produce high purity hydrogen gas from water. The PEM cell was ORIGINALLY DEVELOPED by NASA and is EXTENSIVELY used in industrial and laboratory applications. |
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| 35. |
Which of the following alkanese cannot be prepared by wurtz reaction |
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| 36. |
Please balance the equation and send pic |
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Answer» Answer: The equation is wrong, as there is no hydrogen in the REACTANT SIDE but it is there in the PRODUCT side. |
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| 37. |
What are the effets of acid rain ? Write the products formed in the acid rain |
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Answer» Answer: ACID rain is described as the sower in which the level of acid of sulphur , nitrate ETC is high which cause damage to our ecosystem. The effect of acid rain are ° it make water bodies acidic and leds to dedth of aquatic animal • it effect the tree •it effect the monument's building • it GIVE effect on humans ALSO. • it DISTURB ecosystem.
it will prove helpful to you |
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| 38. |
Write paragraph on coal |
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Answer» Coal is a hard rock which can be BURNED as a solid fossil fuel. It is mostly CARBON but also contains hydrogen, sulphur, oxygen and nitrogen. It is a sedimentary rock formed from peat, by the PRESSURE of rocks laid down later on top. Hope it HELPS! Good luck. |
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| 39. |
What are the effets of acid rain ? Write the products formed in the acid rain. |
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Answer» Answer:Acid rain makes such waters more acidic, which results in more aluminum absorption from soil, which is carried into lakes and STREAMS. That combination makes waters toxic to crayfish, clams, FISH, and other aquatic ANIMALS. (Learn more about the effects of water pollution.) |
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| 40. |
What is the chemical formula of gold permanganate |
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Answer» Answer: Gold(III) PERMANGANATE Au(MNO4)3 MOLECULAR Weight -- EndMemo |
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| 41. |
What are the uses of terelyne |
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Answer»
Terylene is mainly used in making plastic bottles and clothing. Terylene FIBER is used as polyester tericot knit as a fashion GARMENTS fabric. Used for the laundry USAGE as a automatic clothing VACUUM packaging machine. It is used to make non woven needle punched carpet particularly for the exhibition USE. |
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| 42. |
What is meant by evolution of gas chemistry class 10 |
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Answer» A GAS evolution reaction is a CHEMICAL reaction in which one of the end PRODUCTS is a gas such as oxygen or carbon dioxide. Gas evolution REACTIONS may be CARRIED out in a fume chamber when the gases produced are poisonous when inhaled or are explosive. |
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| 43. |
Which one is the second largest element |
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Answer» Cesium is largest element in periodic table Hope it helps u♥ |
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| 45. |
Beta -rays are--1, Helium rays2, Electrons3, electromagnetic induction 4, protons |
Answer» ELECTRONS is the CORRECT ANSWER... |
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| 46. |
When detergent is mixed with water, the dirt from clothes is easily removed this is due to(A) Pressure(B) Viscosity(C) Surface tension(D) Force |
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Answer» force as when clothes are RINSED then water moves around in a SPEED , DIRT ATTACHED to the detergent which is mixed in water also moves alond with it and get separated from clothes |
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| 48. |
Anyone can give me steps to convert Condensed formula of an organic compound to it's IUPAC name by help of this example (CH3)3CCH2C(CH3)3??? |
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Answer» it's on you how you CALCULATE. it Explanation: you TRY it and then if some MISTAKES will be there I will answer it |
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| 49. |
Equation of sodium Bromide |
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Answer» NaBr Formula and structure: Sodium bromide chemical formula is NaBr and the MOLAR MASS is 102.89 g mol-1. It can be found hydrated by one (MONOHYDRATE NaBr) or two (duhydrate NaBr) water molecules. Sodium bromide is formed by one sodium cation Na+ and one bromide ANION Br- which are joined through an ionic bond |
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