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. |
Identify the oxidation and reduction reaction also the oxidizing and reducing agent in the following reaction. ZNH4 +H2SO4 >(NH4) SO4 +H2, CuO +H2 >Cu +H2O, C+PbO2 >CO2 +Pb, H2S +Cl2 >2HCl +S |
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Answer» find oxidation STATE of the all element than the same element in reactant and product anylise if oxidation no. Is DECREASE than reduction If oxidation no INCREASE than oxidation |
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| 3. |
Identify the substances that are oxidized and reduced in reaction. ZNH4 +H2SO4 >(NH4) SO4 +H2, CuO +H2 >Cu +H2O, C+PbO2 >CO2 +Pb, H2S +Cl2 >2HCl +S |
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| 4. |
Draw all function isomers of CH3COOH |
| Answer» HELPS you!PLEASE MARK me as BRAINLIEST if you are SATISFIED | |
| 5. |
Equal amount of chlorine and bromine released into an room which of them will diffuse faster and why???... |
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Answer» ng to Graham’s LAW of diffusion Rate of diffusion ∝ 1/√(Molar mass)From above relation we can say heavier the gas PARTICLES FASTER is its rate of diffusion.Hence bromine gas will diffuse faster. |
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| 6. |
State the sources and effects of the following gases: (i) Carbon dioxide (ii) Methane (iii) water vapour. |
| Answer» ANSWER... Greenhouse GASES cause the GREENHOUSEEFFECT. The primary greenhouse gases in Earth's atmosphere are water vapor,carbon dioxide, METHANE, nitrous oxide and ozone. This increase has occurred despite the uptake of more than HALF of the emissions by various natural "sinks" involved in the carbon cycle. | |
| 7. |
Xef4 doen not store in glass and quartz vessel explain why? |
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Answer» s MADE of sio2 and it REACTS with it...so THATS why xef4 is not STORED in GLASS |
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| 8. |
Write the short not on anaomylous property of lithium |
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| 9. |
Name the following structure.. |
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Answer» that it is an ALDEHYDE and its name is 1ethyl-propanaldehyde. i HOPE that this will HELP you please mark as BRAINLEIST |
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| 10. |
Give the impact of acid rain : (i) on plants (ii) on soil (iii) on water bodies. |
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Answer» tes HOLES in parts of plantsIt kills the helpful microbes and USEFUL bacterias in soilIt CREATES harmful effects on ORGANISMS living in water BODIES |
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| 11. |
How to write the name of following structure? |
| Answer» ANHYDRIDE, it's NAME is ETHANOIC methanoic anhydride. | |
| 13. |
Write on the structure of orthoboric acid and diamond |
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Answer» e ,here is my answer_________❤_________The chemical formula of boric acid is H3BO3 (or B(OH)3). Its molecular formula is BH3O3, and its molar mass is 61.83 g/mol. The chemical structure of boric acid is shown below:The central boron atom is connected to three hydroxyl (-OH) groups, which are capable of strong hydrogen bonding. Its solid crystalline structure consists of parallel layers of boric acid held together in place by hydrogen bonds.Occurrence: Boric acid occurs naturally in volcanic AREAS, and in certain minerals such as borax (as sassolite). It is also FOUND in sea water, plants, and fruits in small amounts.Preparation: Boric acid is prepared by reacting minerals such as borax (Na2B4O7·10H2O), with strong acids like HCl:Na2B4O7·10H2O + 2 HCl → 4 H3BO3 + 2 NaCl + 5 H2OIt can also be prepared by the hydrolysis of boron trihalides (such as BBr3) or diborane (B2H6):BBr3 + 3 H2O → B(OH)3 + 3 HBrB2H6 + 6 H2O → 2 B(OH)3 + 6 H2Physical properties: Boric acid is a white crystalline solid with a density of 1.435 g/mL, melting point of 170.9 °C and boiling point of 300 °C.Chemical properties: Boric acid is a weak monobasic acid, and is considered a Lewis acid. It dissolves in boiling water and in anhydrous sulfuric acid. When heated to high temperatures (over 170 °C), it undergoes dehydration to form metaboric acid (HBO2):H3BO3 → HBO2 + H2O___________Carbon has an electronic arrangement of 2,4. In diamond, each carbon shares electrons with four other carbon atoms - forming four single bonds.In the diagram some carbon atoms only seem to be forming two bonds (or even one bond), but that's not really the case. We are only showing a small bit of the whole structure. This is a giant covalent structure - it continues on and on in three dimensions. It is not a molecule, because the number of atoms joined up in a real diamond is completely variable - depending on the size of the crystal.Physical Properties of Diamondhas a very high melting point (almost 4000°C). Very strong carbon-carbon covalent bonds have to be broken throughout the structure before melting occurs.is very hard. This is again due to the NEED to break very strong covalent bonds operating in 3-dimensions.doesn't conduct electricity. All the electrons are held tightly between the atoms, and aren't free to move.is insoluble in water and organic solvents. There are no possible attractions which could occur between solvent molecules and carbon atoms which could outweigh the attractions between the covalently bound carbon atoms.______________________HOPE THIS HELPS YOUplease like it and [EMAIL protected] |
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| 14. |
Write the relation between the no. Of moles and no. Of molecules of a subtance |
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Answer» ation is No of moles is EQUALS no.of UNITS ÷ avogadro's no n = Nu ÷ NAn= Nu ÷ 6×10^23Hope its USEFUL Have a god DAY |
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| 15. |
Why we should maintain low temperature in ammonia synthesis? |
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Answer» n is REVERSIBLE. HIGHER temperatures will favour backward direction. HENCE concentration of N2 and H2 will increase INSTEAD of NH3 |
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| 16. |
Why is hno3 not used for the laboratory preparation of h2s? |
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Answer» it is a very STRONG OXIDIZING AGENT and it is a VOLATILE ACID |
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| 17. |
2mg(s)+o2(g)2mgo(s) calculate how much oxygen is required to combust 10 moles og mg from the given equation |
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Answer» lanced equation is 2Mg(s)+O2(g)=>2MgO(s)♤ from equation 2 mol of Mg are react with 1MOL of O2◇So 10 mol of Mg react with 5 mol of O2♤the no.of molecules of O2 are5× 6×10^23 molecule ●if u want to CALCULATE MASSES Mass of oxygen is No.of MOLES × molecular massms= n×Mwtms = 5 × 32 = 160g Hope its helpful |
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| 18. |
Which of the folloqing benzene compounds will be most reactive with br2? |
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Answer» s the FOLLOWING??? |
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| 19. |
State the main sources and effects of carbon monoxide ? |
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| 20. |
Explain why tomatoes ripped faster in a greenhouse |
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Answer» eenhouse, without rain to LEACH excessive nutrients away, tomato ROOTS can actually be 'burned' by high nutrient levels. ... The objective of the SPRAY is not to add nutrients but rather STIMULATE soil life, which can then make soil nutrients more AVAILABLE to plants. |
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| 22. |
There are some plastics which when moulded once,cannot be softened by heating . |
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Answer» is DHope it'll HELP You.... |
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| 23. |
The dependence between the properties of the atomic weights of the elements by dmitri mendelee |
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Answer» ments, if arranged according to their atomic mass, exhibit an APPARENT periodicity of 1. properties. ELEMENTS which are similar as regards to their chemical properties have atomic WEIGHTS |
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| 24. |
What is the want of factor for a compound which undergoes tetramerization in an organic solvent? |
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| 25. |
What is the ph of resulting solution when75 ml of 0.2m hcl and 50 ml of 0.1 m naoh mixed? |
| Answer» M1V1 - M2V2 =MV30.2×50–0.1×50=M(100)M=[H+]=0.05pH=-log[H+]pH=-log(0.05)pH=1.30103Hope You GOT It. | |
| 26. |
What is common in 3 States of matters |
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Answer» s NOTHING same into them if u GOT a ANSWER then please TELL me also on comment |
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| 28. |
The bond distance of hcl is 127.5pm and its dipole moment is 1.03d |
| Answer» IKE QUESTION is INCOMPLETE, | |
| 29. |
How do oxides of nitrogen enter the atmosphere ? |
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Answer» atural conditions, nitrogen oxides enter the atmosphere primarily as a result of lightning, which supplies enough energy to cause nitrogen and oxygen in the NATURAL atmosphere to combine chemically. In modern urban areas, however, exhaust gases from vehicles POWERED by INTERNAL COMBUSTION engines are the primary SOURCE. |
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| 30. |
Hey guys ♡♡♡♡♡♡♡♡♡♡♡ ●Which of the following carbocation has least stability ?♤ methyl♤ethyl♤isopropyl♤tert-butyl●Shape of carbocation is _____● the common name of 2-butanone is ________●The principle involved in paper chromatography is_________●Hybridaization of H2C=O is___●The common name of proaone, ethanenitrile. |
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Answer» ________________1. methyl2.ethyl METHYL ketone3.partition4.sp25.Acetone, ETHANENITRILE If its HELP U mark as brainlist !!! |
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| 31. |
Prepare M/20 solution of ferrous ammanium sulphate (Morh's salt) using this solution find out the molarity of the given potassium permanganate solution |
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Answer» o this tommorow and SEND you observations i hope that you can wait until i will ANSWER your QUESTION |
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| 32. |
Advertisement solutions motorcycle is to be lauch hoghlightly it's quality |
| Answer» LY a MOTOR CYCLE has COME THE PRICE OF THIS MOTORCYCIE IS -78,000 | |
| 33. |
Why natural resources are importance speech in hindi? |
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Answer» ing which can FULFIL our BASIC NEEDS is called natural resources.Example : Water, sunlight ETC. |
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| 34. |
What is meant by homologous serios of carbon compound give its 4 property? |
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| 35. |
What is present in reactant side in doubke displacement reaction? |
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Answer» _____Reactants |
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| 38. |
Give an experiment to show evaporation by separating ink and water. |
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Answer» e ink from water USING a process CALLED distillation. This is a process of SEPARATING two substances mixed together. Water VAPORIZES at a LOWER temperature than the ink pigment so if you heat them, the water evaporates, leaving the ink pigment in the flask |
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| 39. |
Why o-nitrophenol is not have intermolecular hydrogen bonding? |
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Answer» the H atom of OH is strongly ATTRACTED by O atom of NO2.....by intra molecular H BONDING...thus it can't FORM H bond with other MOLECULES..... |
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| 40. |
Class 10 Carbon compouds please give me the answers of the following questions: |
| Answer» E of the PRECIPITATE is barium chromate. The type of chemical reaction is DOUBLE displacement.Reaction :K2CRO4 + BaSO4 => BaCrO4 + K2SO4 | |
| 41. |
Almost of most elements are not able to exist independently name two atoms which exist as independent atoms |
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| 42. |
Why alluminium cloride show ionic amlnd cova lent bonding? |
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Answer» no IDEA about this i REALLY FEEL sorry for you that i FAILED to solve your PROBLEM. |
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| 43. |
Why lithium react with oxygen to form oxide but not peroxide? |
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Answer» thium react with oxygen to form OXIDE but not peroxide because Lithium is very reactive.So, it CATCHES fire easily and BECOME oxide.Therefore, Lithium react with oxygen to form oxide not peroxide. |
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| 44. |
Using the bohr's model, calculate the speed of the electron in a h atom in n=1,2 |
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Answer» y of ELECTRON in NTH orbit = (2.18 ×10^6×Z)÷n m/swhere Z = at. no.here n = 1 , 2hence VELOCITY = 2.18 ×10^6 and 5.26×10^6 m/s RESPECTIVELY |
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| 45. |
How do convert 2 - butene to ethanol |
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Answer» 3/H3O+ ] then [ NABH4 ] in 2 BUTENE it CONVERTS into ETHANOL |
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| 46. |
Convert acetic acid to trichloro acetic acid |
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Answer» l-Vohlard-Zelinsky method, in other words, use RED PHOSPHORUS and 3 MOLES of chlorine. |
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| 47. |
Which block shows max tendency towards complex formation? |
| Answer» E d-block which SHOWS the MAXIMUM TENDENCY. | |
| 48. |
Reaction between acetic acid with ethol in presence of sulphuric acid |
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Answer» with a large quantity of EXCESS concentrated sulphuric acid on heating produces ethene.ethanol >>> ethylene + water acid protonates the OH, this leaves as water, and the acid is regenerated by taking a proton form the carbon next to the one that had the OH on it. The electrons that were on this H are used to make the DOUBLE bond.CH3-CH2-OH → (H2SO4 + heat) → CH2=CH2 + H2Oorproduction of diethyl ether was by the dehydration of ethanol by CONC H2SO42C2H5OH → H2SO4) → C2H5 - O - H5C2 + H2O |
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| 49. |
Dry abd wet test for Ca2+ |
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Answer» st is formed by HEATING a small amount of salt in a DRY test TUBE |
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| 50. |
A radioactive material cosnsits of nuclides of 3 sotopes which decay by aplha, beta emsiision and deutron |
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