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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. |
The number of moles of methyl iodide required to preparetetramethyl ammonium iodide from 1 mole of methyl amineis/are :(a) 1(6) 2(c) 3(d) 4. |
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| 2. |
Identify antibiotic drug amongst the following:(a) Codeine(b) Equanil(d)Penicillin(d) Valium |
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| 3. |
5. Write the balanced chemical equation for the following and identify the type of reaction ineach case.a. Hydrogen gas combines vith nitrogen to form ammonia 3b. Barium chloride combines with aluminium sulphate to give aluminium chloride and aprecipitate of barium sulp nate. Jedl, Alle) > Babac. Iron combines with Copper sulphate to form Iron sulphate and copper. |
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Answer» Answer: c. FE + CuSo4 - fe2so4 + Cu Explanation: Fe is more REACTIVE than copper so it DISPLACES cu FORM copper sulphate and forms FERROUS sulphate |
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| 4. |
(v) Conversion of methyl chloride into methyl fluoride is knownas(a) Finkelstein reaction(C)Williamson's synthesis(B)Swarts reaction(D)Wurtz reaction |
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Answer» Answer: Swartz Reaction SWARTS Reaction:- Swarts reaction is GENERALLY used to GET alkyl fluorides from alkyl CHLORIDES or alkyl bromides. This is done by heating of the alkyl chloride/bromide in the presence of the fluoride of some heavy metals ( silver fluoride or mercurous fluoride for example). |
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| 5. |
Identify complex ion in which effective atomic number ofthe central metal ion is 35.(Given At. number of Co = 27, Fe = 26, Zn = 30) |
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Answer» it is germanium and it conduct 35 SHARING elctrovenlent IONS |
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| 6. |
What hapreas when copper oxide react with.dilute hydrochloric acid |
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Answer» Answer: REACTION is CuO + HCl ----> CUCL2 + H2O Balanced reaction is CuO + 2HCl ----> CuCl2 + H2O HOPE THIS HELPS YOU....... |
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| 7. |
In how many ways heptane can be represented |
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| 8. |
Do an activity to show that when exes carbon dioxide pass thought lime water the mika is less dessipere |
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Answer» Answer: when CO2 gas is passed through lime water it turns milky due to the formation of calcium carbonate which formula is CaCO3. when EXCESS of carbon dioxide is passed through calcium carbonate calcium hydrogen carbonate is formed and solution become colourless If you pass excess CO2 through lime-water, the CaCO3 reacts with the excess CO2 and water to form calcium hydrogen carbonate or calcium bicarbonate. Calcium bicarbonate is soluble in water and thus the milkiness dissolves in water. white Calcium carbonate is considered a soft, nonabrasive filler. Its NATURAL COLOR is white, HOWEVER, it can be easily colored. It is chemically STABLE up to 800°C and above this temperature it dissociates into calcium oxide and carbon dioxide. |
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| 9. |
Which among the following hydrides is NOT a reducingagent?@ H2O(b) H2S(c) H2Te(d) H2Se |
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| 10. |
Hydrogen can have oxidation number/s ofa) -1 only b) +1 onlyc) O onlyd) -1,0, +1 |
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| 11. |
(iii) During oxidation of ferrous sulphate using mixture of dil.H2SO4 and potassium dichromate; oxidation state ofchromium changes from(a) +6 to + 2(b) +6 to + 3(c) + 6 to +1(d) + 6 to + 4 |
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Answer» Answer: b) +6 to + 3 Explanation: |
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| 12. |
Of the following compounds, which has thehighest boiling point?a) n-Butyl chloride b) Isobutyl chloridec) t-Butyl chloride d) n-propyl chloride |
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| 13. |
How to solve these kind of questions ? |
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Answer» CONCENTRATE and try to keep UR mind COOL take a little HELP from google and mark me as brainliest |
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| 14. |
(vii) Name the reagent which on reaction with glucose confirmsthe presence of five hydroxyl groups in glucose :(a) Hydroxyl amine(b) Bromine water(c) Dilute nitric acid(d) Acetic anhydride |
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| 15. |
Name the universal indicator??? |
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Answer» ans: The MAIN components of a UNIVERSAL indicator, in the form of a solution, are THYMOL blue, methyl red, bromothymol blue, and phenolphthalein. |
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| 16. |
Why the equilibrium constant expression for following reaction to NOCl (g) gives 2NO(g) + Cl2 (g) |
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| 17. |
1. What do you mean by mass per cent of a solution? How will you make 30 % mass per centsolution of sodium chloride in water? |
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Answer» Answer: mass % means number of grams of solute to MAKE total 100 grams of solution Explanation: 30% mass solution is prepared by dissolving 30 grams NaCl in 70 grams of WATER |
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| 18. |
What is universal indicator???? |
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Answer» Explanation: a mixture of DYES that CHANGES colour gradually over a range of pH and is used (especially as indicator PAPER) in TESTING for acids and alkalis. please follow me and Mark it as brainliest answer |
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| 19. |
(x) Calculate the work done during the reaction represented bythe following thermochemical equation at 300 K:CH4 +202 → CO2 + 2H2O(g) (g) (g) (1)(R = 8.314 JK-'mol !)(a) +4.988 kJ(b) – 4.988 kJ(c) - 49.88 kJ(d) + 49.88 kJP.T.O. |
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Answer» a) +4.988KJ by CONVERTING R into KJ |
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| 20. |
Vapor pressure.short notes |
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Answer» Answer: the PRESSURE of a vapour in CONTACT with its liquid or solid form |
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| 21. |
Emulation short notes |
Answer» ᏗᏁᏕᏇᏋᏒ:
hᎾᏢᎬ ᎥᏆ hᎬᏞᏢs mᎪᏒᏦ Ꭺs ᏆhᎬ bᏒᎪᎥᏁᏞᎥᎬsᏆ.... |
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| 22. |
How can i easily draw isomers for board xams? |
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Answer» you can GO and watch video on YOUTUBE we cannot EXPLAIN by WRITING |
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| 23. |
Chemical equation when milk is kept in room temperature. |
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Answer» Answer: When the milk is left at ROOM temperature, the OXIDATION reaction occurs and the GROWTH of MICROORGANISMS occur due to which it gets sour. |
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| 25. |
HiiiiiiWhT is polymers |
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Answer» the materials that are FORMED by TH polymerization of MILLIONS of small molecules called monomers |
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| 26. |
What is anomeric effect with example |
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Answer» Answer: The anomeric effect DESCRIBES the axial preference for an ELECTRONEGATIVE SUBSTITUENT on the pyranose ring adjacent ... In RELATED examples, several crystal structures have been solved for thieno[3,2-e]-1 ... |
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| 27. |
Ⓐⓝⓢⓦⓔⓡ ⓟⓛⓔⓐⓢⓔ................................. |
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Answer» d is the answer ...... |
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| 28. |
What are the needs of chemical fertilizers in crop field |
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Answer»
Chemical fertilizers ALLOW GROWERS to MAXIMIZE their crop yield on a specific PIECE of land — the more the plant grows, the better. Fertilizer works to ensure that each piece of land produces as EFFICIENTLY as possible. |
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| 29. |
Calcuate the amount of water required to prepare 500 g of 2.5% solution of sugar. |
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| 30. |
Whataretheactivityprecautions taken in thefocal lengthof thein thelens dependson thesurrounding medium the man who attendanswersascorrectIt will bea best answer |
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| 31. |
how to calculate molar mass..... please answer very quickly... because my exams are going on.... |
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| 32. |
Answer the following questions 1. the main constituent of Marsh gas is ........................... . 2. why graphite is smooth?¿3. in the case of water molecule hydrogen acquires a ........................ configuration.CAUTION: NO SPAMMERS IF YOU SPAM YOU WILL BE REPORTED |
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Answer» Explanation: the main constituent of Marsh gas is ( methane )why graphite is smooth?Simple Answer (Bookish) : WITHIN the layer, the carbon atoms are held by the strong covalent bonds but between the layers we have the weak Van der Waals forces and it therefore becomes easy for two layers to slip past each other GIVING Graphite its smooth nature and usefulness in lubrication. In the case of WATER molecules, two atoms of hydrogen combine with one atom of oxygen to form a water molecule. In it, the 2 hydrogen donates 2 electrons (1 form each) to oxygen. Thus the oxygen ATTAINS octet whereas the hydrogen attains duplet hope this will help U broo... |
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| 33. |
34 g of H2O decomposes to _______g of hydrogen and______ g of oxygen. |
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Answer» Answer: H2= 11.7647059 O2= 88.2352941 Explanation: 2H2o — 2H2 + O2 34gm 4gm 30gm from 34gm of WATER HYDROGEN OBTAINED= 4×100/34 = 11.7647059 from 34gm of water oxygen obtained= 30×100/34 = 88.2352941 hope it help you!!!
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| 34. |
Why is mercury preferred as a thermometer liquid |
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Answer» Explanation: MERCURY is the only one in LIQUID state at room temperature. It's used in thermometers because it has high coefficient of expansion. Hence, the slightest CHANGE in temperature is notable when it's used in a thermometer. It also has a high boiling point which MAKES it very suitable to measure higher temperatures. |
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| 35. |
READ THE PARAGRAPH GIVEN BELOW AND FILL IN THE BLANKS BY CHOOSING THE MOST APPROPRIATE WORDS FROM THE GIVEN OPTION |
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Answer» Explanation: 2,4,3,4 ANSWERS are these |
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| 36. |
Give 5 example for ionic solids |
Answer» ♥Sodium chloride (NACL)♥Magnesium Chloride (MgCl2)♥Calcium Fluoride (CAF2)♥Zinc SULPHIDE (ZNS)____________________________ HOPE it helps to uh❤
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| 37. |
Give 5 example for covalent solids |
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Answer» Hello, an example of covalent solid is diamond. Molecular solids also have localized electrons (localized within the bonds in each MOLECULE) and as such, do not conduct ELECTRICITY. Examples include ICE (solid water), DRY ice (solid CO2), solid iodine, and napthalene to name a few. |
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| 38. |
EntWhich of the following statements are incorrectA) The properties of a compound are different from its constituents eB) A mixture is homogenous but a compound is heterogeneousc) Formation of a compound is a chemical changep) Formation of a mixture is a chemical changea) (b) and (d)b) (a), (b) and (c)d) (a) and (b)c) (a), (b), (c) and (d) |
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| 39. |
Please give answer fast.Arrange the following compounds in decreasing order of their solubility in water.Ethyl amine, diethyl amine and triethyl amine |
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| 40. |
Give 5 example for metallic solids |
Answer» Examples of metallic solids include, copper, GOLD, ZINC, .... We TEND to think about metallic solids as pure metals, but they can also be combinations of metals like bronze, which is a mixture of copper and tin.Explanation: hope it HELPS you pls mark me as the brainlist |
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| 41. |
Please answer fast....molecular formula of the plaster of paris and Gypsum....??? |
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Answer» CALCIUM SULPHATE HEMIHYDRATE -CaSO4.1/2H2O Calcium sulphate DIHYDRATE - CaSO4.2H2O. |
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| 42. |
Arrange the following compounds in decreasing order of their solubility in water.Ethyl amine, diethyl amine and triethyl amine |
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| 43. |
Compare the magnetic behaviour and relative stabilities of N2+ & O2- |
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Answer» Answer: Explanation: MAGNETIC behavior: N2 : diamagnetic O2- : paramagnetic Relative STABILITY: N2 : stable with BO=3 O2- : stable with BO =1.5 N2 is more stable |
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| 44. |
Calculate the no of atomno of atom =molecules mass/avogrado no |
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Answer» Answer: Explanation: |
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| 45. |
Why is heat released or absorbed in a chemical reaction |
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Answer» if it is a EXOTHERMIC it will liberate GAS, ENDOTHERMIC means it will ABSORB gas |
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| 46. |
Could I find an excellent chemistry tutor over here ??? |
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Answer» Hey Explanation: NOPE.................. |
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| 48. |
There are four colourless solutions of sodium hydroxide, sodium chloride, hydrochloric acidand ethanoic acid. Which of them contains,a) Highest amount of hydroxyl ions?b] Highest amount of hydronium ions?c) Lowest amount of hydronium ions?d] Equal amount of hydroxyl and hydronium ions?On pH scale where do you put these solutions? |
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Answer» Answer:a) NAOH b) HCL c) NaOH d) NaCl HCl (2) |
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| 49. |
What kind of a bond does Na form with Cl? |
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Answer» Ionic bond |
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| 50. |
Can anybody help me out with d basics of chemistry... |
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