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. |
Nirlipt ka mulshabdh and upsarg ....please |
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Answer» argलिप्त मूल शब्दHope it will HELP U frienD✳️✳️✳️✌️✳️✳️✳️✌️✳️✳️✳️ |
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| 2. |
Lower and higher homolofua of alkene containing 4 carbon atoms |
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| 3. |
Magnetic properties of coordination compounds 2 |
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Answer» es such as N2 and ions such as Na+ and [Fe(CN)6]4− that contain no unpaired electrons are DIAMAGNETIC. Diamagnetic SUBSTANCES have a slight TENDENCY to be repelled by magnetic fields. When an electron in an ATOM or ion is unpaired, the magnetic moment due to its spin makes the entire atom or ion paramagnetic |
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| 4. |
Does combustion of carbon dioxide in fire extinguisher stop fire |
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Answer» ents the chemical REACTIONS involving heat, FUEL, and oxygen (combustion), thus extinguishing thefire. ... In the heat of a fire, it RELEASES a CLOUD of carbon dioxide that smothers the fire. That is, the GAS drives oxygen away from the fire, thus stopping the chemical reaction. |
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| 5. |
Lanthanide for which +2 anf +3 oxidatiom state is common |
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Answer» ur answer.The most STABLE oxidation state of Lanthanides is +3. They also SHOW +2 and +4 oxidation states due to the presence of either HALF FILLED or completely filled or empty 4f sub shell.______________________________________hope it helps you! |
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| 6. |
Ch3cooc2h5 name and also reason |
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Answer» pound CH3COOC2H5 is ethyl ethanoate. The ACID and alchohol from which it is MADE are Ethanoic acid and ETHANOL. C2H5OH + CH3COOH -----> CH3COOC2H5 + H20 ETHANOL ETHANOIC ACID ETHYL ETHANOATE WATERMARK ME AS BRAINLIEST |
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| 7. |
If negative charge on oxygen atom increases its electronegativity a)increases b)decreases plz explain with reason |
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Answer» perty GAIN electrons by an atom is CALLED ELECTRONEGATIVITY so (a)is the ANSWE |
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| 8. |
Is NaCl is salt without water of crystallization |
| Answer» F crystallization refers towater that is established in the crystalline FRAMEWORK of a metal complex or a SALT, which is not DIRECTLY bonded to the metal cation. ... NaCl salt does not contain WATER of crystallization. | |
| 10. |
Write the name and molecular formula of the forth member alkane and alkene series |
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Answer» c4h12...butene-c4h8 |
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| 12. |
What is the Difference between propane and propene on grounds of flame produced? |
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Answer» gives a BLUE FLAME while as PROPENE gives yellow flame with SMOKE |
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| 14. |
If we react secondry alcohol with cu at 573 k what will form |
| Answer» E is FORMED with a SECONDARY ALCOHOL. | |
| 15. |
Ice, water and steam are three different states but not different substances. Juatify |
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Answer» er and stream have the same elements, in it which is Hydrogen & oxygen. therefore they are same substance, but if we TALK about the phase or state. they EXIST in different phases that DEPENDS on the temperature and pressure. thus ICE ---> water if we heat it and water ----> steam it we further heat it |
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| 16. |
What is refining........ |
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Answer» g is the process of REDUCING the IMPURITIES in a SUBSTANCE . you can't crude oil into gasoline WITHOUT first refining it...... |
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| 17. |
Write the two methods of preventing rancidity |
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Answer» ng ANTIOXIDANTS and by PACKING the FOOD in NITROGEN gas |
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| 18. |
Identification the cation and anion in a given salts |
| Answer» ION WOULD be the eta and ANION would be the non metal present in the given SALT | |
| 20. |
In branched chain among bromine and methyl which is 1st |
| Answer» NG to me I THINK BROMINE is the FIRST | |
| 21. |
Give reason position of hydrogen is contreversial |
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Answer» it has been placed at the TOP of ALKALI metals though most of it's PROPERTIES resemble with noble gases |
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| 22. |
How is heating of wax and heating of ammonium chloride different from each other. Explain? |
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Answer» /www.quora.com/How-is-heating-of-sugar-different-from-heating-of-ammonium-chlorideu can SEARCH this LINK...it MAY HELP UUH |
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| 23. |
2 ml of sodium hydroxide solution is added to a few pieces of granulated zinc metal taken in a test tube a gas evolves which is bubbled through our soap solution before testing . Write the equation of chemical reaction involved and the test to detect the gas . Name the gas which will be evolved when the same metal react with dilute solution of a strong acid |
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Answer» ts with NAOH to form a coordination compound called sodium zincate with evolution of H2 gas.When sodium hydroxide is heated with Zinc granules - Sodium Zincate and hydrogen gas is evolved.2NaOH(aq)+Zn(s)→Na2ZnO2(aq)+H2(g)↑When burning SPLINTER is brought near the mouth of the test tube, it burns with a POP SOUND. If Zinc granules react with strong; acids (HCl or H2SO4) then again Hydrogen gas will be evolved.Zn(s)+(DIL)2HCl→ZnCl2+H2↑Zn(s)+(dil)H2SO4→ZnSO4+H2↑hope this will help you. |
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| 24. |
Which is smaller in size? Li or F and why? |
| Answer» INE) is SMALLER as atomic RADII decreases and nuclear CHARGE increases ACROSS the period. | |
| 25. |
an atom of an element has 2 electrons in the outermost M cell state electronic configuration atomic number number of protons valency of this element |
| Answer» SINCE The atom Has 2 ELECTRONS in its outermost shellElectronic configuration= 2;8;2.Atomic No=12.valency = 2.HOPE IT HELPS U. | |
| 26. |
What happen if a lighted candle is brought near the mouth of a jar contain carbon dioxide gas |
| Answer» EXTINGUISHED | |
| 27. |
Aluminium is highly reactive metal ,yet it used to make untensils for cooking |
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Answer» good CONDUCTOR of HEAT ENERGY and also it consists of an protective oxide that PREVENTS it from reaction with other metals |
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| 28. |
What are alkanes alkenes and alkynes give an example of each |
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Answer» pound made up of Hydrogen and carbon only is called HYDROCARBON(Hydrogen+Carbon= Hydrocarbon), e.g . CH4,C2H4,C2H2 etc._____________________✨:- An alkane is a hydrocarbon in which the carbon atoms are connected bt only single covalent bonds. Saturated hydrocarbons are also called alkanes. ✔️The general FORMULA of Alkane is CnH2n+2 .=============================✨:-Alkenes are unsaturated aliphatic hydrocarbons , which CONTAIN ONE double bond . Alkenes are also called olefins(oil Forming).✔️Alkene form a homologous SERIES having the general formula CnH2n.==================↓✨:- Alkynes are unsaturated aliphatic hydrocarbons which contain a triple bond I.e acetylene bond between two carbon atoms .✔️They have general formula CnH2n-2.====================→ |
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| 29. |
why cannot displacement reaction in zinc sulphate and copper sulphate solution takes place on adding copper turnings |
| Answer» ZINC is more REACTIVE than COPPER. KNaCa MgAlZnFePbHCu | |
| 33. |
How would you differentiate between: (a) ethane and ethene. (b) ethene and ethyne. |
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Answer» has a CHEMICAL formula of C2H4, whereas ethyne has a chemical formula of C2H2. This is because a double BOND is PRESENT between the carbon atoms in ethene, and a triple bond is present between the carbon atoms in ethyne. ... Ethene is a hydrocarbon which has the formula C 2H 4 or H₂C=CH₂.Ethane formula C2H2Hope it helpsFind the attachment for difference between ethane and ethene |
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| 34. |
in which of the following pairs, both are acidic salts? A) Na2SO4,K2SO4B) KCL, KNO3C) CH3COONA,K2CO3D) CuSO4,AgNO3 |
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| 35. |
Name the phenomenon due to which taste and smell of oily food changes when kept for long time open suggest one method to prevent |
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Answer» nomenon is CALLED rancidityit can be PREVENTED by keeping it in air tight CONTAINER or by ADDING antioxidants |
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| 36. |
What is Zwitter ion? |
| Answer» ULE or ion having separate positively and NEGATIVELY charged GROUPS. | |
| 37. |
Please solve this...Tomorrow is my test....please help me!!! |
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Answer» your ANSWER. |
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| 38. |
On adding naoh to ammonium sulphate a colourless gas with pungent odour is evolved which forms a blue coloured complex with cu2+ ion. Identify the gas. |
| Answer» EVOLVED is AmmoniaMark me BRAINLIEST | |
| 39. |
किसे शुष्क बर्फ कहते हैं ?. |
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Answer» ्बन डाइऑक्साइड (solid CARBON dioxide) को शुष्क बर्फ (dry ICE) कहते हैं। 1 ATM (ATMOSPHERIC pressure, यानी वातावरण द्वारा लगाया गया दाब) से कम दाब होने पर कार्बन डाइऑक्साइड ठोस रूप लेते हुए, शुष्क बर्फ बन जाती है। दोबारा 1 atm में रखने पर यह वापस गैस रूप में बदलने लगती है। इसका प्रयोग चीज़ों को जमाने के लिए या जमे रखने के लिए किया जाता हैं क्योंकि यह सामान्य बर्फ से कहीं ज्यादा ठंडी होती है ।इसका प्रयोग खाने के रखरखाव में किया जाता है (Food preservation) ताकि यह जीवणुओ, विषाणुओं इत्यादि से सुरक्षित रहें। |
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| 40. |
Calculate the mass of 12.044 into 10 to the power 25 molecules of oxygen |
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Answer» s is 6400gms. |
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| 41. |
Arrange the metals Mg, Na, Ag, Cu, Fe, Zn in the increasing order of reactivity. Which one will be the strongest reducing agent and which one will be the weakest one? |
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Answer» e>Zn>Mg>NaThus, NA is the STRONGEST Reducing AGENT and SILVER is the weakest Reducing Agent in the above table. |
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| 43. |
Why does p- nitrochlorobenzene undergo nucleophilic substitution faster than chlorobenzene ? |
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Answer» ductive EFFECT produce by the nitro group at pera position and DECREASE the election density at benzene ring so NUCLEOPHILE easily attack on benzene ring |
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| 44. |
Explain about the fraction distillation? In points!!!!...... |
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Answer» re is your answer...↓↓↓↓↓↓↓↓↓↓Fractional Distillation :-→ Fractional distillation is USED to seperate any solution containing liquids with different BOILING points.→ The liquid in the mixture with the lowest boiling point (the most volatile) DISTILS over first.→ The final liquid to distil over is the one with the highest boiling point (the least volatile).→ The fractional distillation can be adapted as continuous process and is used industrially to seperate:- • The various FRACTIONS from petroleum. • The different gases from liquid air.____________________________I hope it helps you...____________________________ |
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| 46. |
What do you mean by chemical properties? |
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Answer» cal property is any of a material's properties that becomes evident during, or after, a CHEMICALREACTION; that is, any quality that can be established only by changing a SUBSTANCE's chemical IDENTITY. ... They can ALSO be useful to identify an unknown substance or to separate or PURIFY it from other substances. |
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| 47. |
What do you mean by Avogadro's constant |
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Answer» o CONSTANT = 6.022*10^23 |
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| 48. |
Smoke and fog both are aerosols Inwhat way are they different smoke and fog both are aerosols is in what way are they different |
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| 49. |
Why does colour of copper sulphate solution change when an iron nail is dipped in it ? write a balanced chemical equation for same. |
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Answer» of copper sulphate solution is blue in colour.Iron being highly reactive element than copper which displaces the copper from its salt solution...When this happen , two things are OBSERVED => Colour of the copper sulphate solution ( blue colour ) turns light green which is nothing just a iron sulphate solution..=> Copper get deposited over the iron nail DUE to which iron nail turns in brownish colour..This type of reaction is called displacement reaction in which highly reactive element displaces the least reactive element from its salt solution...Chemical EQUATION =================CUSO4 ( aq ) + FE ( s ) --> FeSO4 ( aq ) + Cu ( s )( equation is already balanced ) |
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| 50. |
What happens when aluminium cloride reacts with zinc granules |
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Answer» to your question: ♡There will be no REACTION between ALUMINIUM Chloride and ZINC granules as ACCORDING to the reactivity series,zinc granules won't be able to displace aluminium from aluminium chloride as zinc is less reactive than aluminium.Hope it HELPS ^_^ |
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