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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. |
Define protochemicals |
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Answer» Petrochemicals are the chemical PRODUCTS obtained from PETROLEUM by refining. Some chemical compounds made from petroleum are also obtained from other fossil FUELS, such as coal or natural gas, or renewable sources such as maize, palm fruit or SUGAR cane. Explanation: |
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| 2. |
In methyle butyl ether willcontain no of carbon34 56 |
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Answer» 5 is the answer Explanation: 5 is the answer |
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| 3. |
What is carbocation? Draw the structure of methyl carocation. |
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| 4. |
Calculate oxidation number of "v4o7" |
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Answer» on the RIVER in the river in the river in the river in the river in |
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| 5. |
Water which is present incellwall is calledBound waterO Free waterO Imbibed waterOAdsorbed water |
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Answer» IMBIBED water Explanation: |
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| 6. |
(a) Indicate the steps involved in the preparation of K Cr,0, fromchromite ore. Write chemical equations of ractions involved.(b) Account for the following:(i) Copper is regarded transition metal although in has 3dłºconfiguration.(ii) Transition metal ions are coloured in water.(iii) On moving down Zr to Hf in group 4, it is observed that theiratomic and ionic radii are almost the same. |
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| 7. |
What volume of 1.8N H2SO4solution is required tocompletely neutralize 15 ml of1.5N NaOH solution1.7317317.3 0.173 |
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| 8. |
The boiling point ___ with ____ in elevationa) decreases, decreasesb) increases, increasesc) decrease, increased) increase, decrease |
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Answer» (c) decrease, increase The boiling point decrease with INCREASE in elevation. |
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| 9. |
Calculate the angular momentum of orbitals is equal to 4 |
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Answer»
The EQUATION for calculating orbital angular momentum is L=h2π√l(l+1) where l is the azimuthal quantum number and H is the Planck's constant.
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| 10. |
Q. 8 What is meant by homologous series? Write the first that being with ch3cho |
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Answer» Answer: CH3-CHO is a member of ALDEHYDE series. FIRST 4 MEMBERS of this series are - H-CHO. CH3-CHO. CH3-CH2-CHO. |
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| 11. |
Water which is present in cellwall is called |
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Answer» Explanation: the GROUP OOMYCETES ALSO KNOWN as water MOLDS are saprotrophic. which is not found in fungal cell wall |
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| 12. |
✬ HeY There ! ✬➥How many elements are there in 2021 ? Verify with online data. |
Answer» ANSWER :-There are TOTAL of 118 ELEMENTS. => We can see this on the MODERN periodic table. Thank you ♥️ |
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| 13. |
State one appropriate observation for the following:(i) When dilute hydrochloric acid is added to sodium carbonate crystals.(ii) At the anode when aqueous copper sulphate solution is electrolysed using copper electrodes.(iii) Zinc nitrate crystals are strongly heated.(iv) Ammonium hydroxide solution is added in excess to Zinc nitrate solution.(v) Bromine vapours are passed into a solution of ethyne in Carbon tetrachloride. |
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Answer» Answer: |
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| 14. |
Write difference among solution suspension and colloidal solution |
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Answer» Answer: Colloidal solutions: Colloidal solutions are the type of mixture, where the solute (tiny PARTICLES or colloids) is uniformly DISTRIBUTED in the solvent (liquid phase). suspension: Th suspensione is the mixture, where the solute does not GET DISSOLVED, rather get suspended in the liquid and FLOAT freely in the medium. Sugar solution in water. |
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| 15. |
. Write electronic configuration of lanthanoids. |
Answer» ANSWER :-OUTER ELECTRONIC CONFIGURATION of LANTHANOIDS is 4f0 5d1 6s2 Thank you ♥️ |
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| 16. |
डिफाइन हीट आफ फॉरमेशन |
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Answer» ऊष्मा (HEAT) या ऊष्मीय ऊर्जा (heat ENERGY), ऊर्जा का एक रूप है जो ताप के कारण होता है। ... किसी पदार्थ के गर्म या ठंढे होने के कारण उसमें जो ऊर्जा होती है उसे उसकी ऊष्मीय ऊर्जा कहते हैं। अन्य ऊर्जा की तरह इसका मात्रक भी जूल (JOULE) होता है पर इसे कैलोरी (CALORIE) में भी व्यक्त करते हैं। |
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| 17. |
What is used for polishing diamonds and precious stones. |
Answer» ☆Answer☆Silicon carbide, a manmade compound of silicon and carbon with a Mohs hardness of 9.5, is ALSO WIDELY used for cutting softer gemstones. Other compounds, such as cerium OXIDE, tin oxide, chromium oxide, and aluminum oxide, are frequently used in polishing gemstones. |
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| 18. |
सर्व सजीवांच्या रचनात्मक आणि कायरयत्म |
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Answer» jfziiduyzndysmfzynfzmyfmusududfgd |
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| 19. |
What do you think should be the reason for not working on the metallization process? |
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Answer» Answer: In general, the metallization process ENTAILS preparing the surface via abrasive BLASTING to REMOVE imperfections and defects, followed by the application of heat to produce molten PARTICLES that are SPRAYED onto the surface Explanation: MARK AS BRAINILIEST ✌️✌️ |
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| 20. |
RIODIC TABLE & PERIODICITYtron gain enthalpy (Electron affinity)Electron affinity is a:(1) Relative strength to attract the shared electron pair(2) Necessary energy required to remove the electron from the ultimate(3) Energy released when an electron is added to the outermost shell(4) Energy released when an electron is added to the inner shell |
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Answer» radio DIFFERENT from KNP ANSWERS and strategy is a relative strength to ATTRACT the sudden lekin prayer necessary energy required to remove the ELECTRONIC from the |
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| 21. |
PERIONlonisation Energyin a given energy level, the order of penetration effect of different orbitals is(1) fcd pcs (2) s-pod-(3) s |
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| 22. |
A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?a) It is an endothermic reactionb) It is an exothermic reactionc) It is a decomposition reactionplz answer quick |
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Answer» C) It is a DECOMPOSITION reaction PLZ answer quick I THINK this is your answer mark me as brainlist plz |
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| 23. |
Write the IUPAC name of CH3CH2CHOHCH2CH3 |
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Answer» Answer: Pentan-3-ol or 3-Pentanol Explanation: Molecular FORMULA : C5H12O STRUCTURAL Formula:(See the IMAGE) MARK ME BRAINLIEST!!! |
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| 24. |
How does rate constant of reaction varies with temperature? |
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Answer» Answer: MARK BRAINLIST ANSWER Explanation: Increasing the temperature of a reaction generally SPEEDS up the PROCESS (INCREASES the rate) because the rate constant increases according to the Arrhenius Equation. As T increases, the VALUE of the exponential part of the equation BECOMES less negative thus increasing the value of k. |
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| 25. |
सुदूर संवेदन के क्या लाभ है |
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Answer» सुदूर संवेदन के उपयोग या अनुप्रयोग किसी शहर , आपातकालीन स्थिति का सर्वे या जानकारी आदि का भी पता लगाया जाता है। किसी युद्ध क्षेत्र में दुश्मनों की स्थिति या उनकी गतिविधियों का पता भी लगाया जा सकता है। किसी प्राकृतिक घटनाओं का पता लगाने या स्थिति का अर्थात घटना में क्षति आदि का सर्वें का पता भी लगाया जाता है। |
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| 26. |
(7) Write the formula to determine molar mass of solute using freezing point depressionmethod. |
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Answer» WRITE the formula to DETERMINE molar MASS of solute using freezing POINT depression method. |
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| 27. |
Find the specific volume, enthalpy internal energy a &entropy of wetsteam at 15 bar pressure & at drynesfraction 0.8 |
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Answer» DONNEZ l'impératif EN TROIS formes. a) Savoir b) S'amuser |
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| 28. |
What is Galaxy?????? |
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Answer» A galaxy is a huge collection of gas, DUST, and billions of stars and their SOLAR systems. A galaxy is held together by gravity. Our galaxy, the Milky Way, also has a supermassive black hole in the middle. When you look up at stars in the night SKY, you're SEEING other stars in the Milky Way. |
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| 29. |
Calculate the number of molecules of Ca0 present in 28gm of Ca0 also calculate number of calcium present in it. ( Mass number, ca=40 , o=16 ) |
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Answer» nndnxbxbxbxbxbdjskalalalajshxhxuxjdnsnskwlwlwlqlalalalalskskskskdjskslsjskakmsldksksksksksksksksk |
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| 30. |
Standard enthalpy of formation of water is -286 kJ mol-1. Calculate the enthalpy change for formation of 0.018 kg of water |
Answer» PLEASE write a right questions because questions because this QUESTION |
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| 31. |
ULIUMIdentify the main product of thereactionCH3-CH2-CH3 catalyst is O2 & HEAT |
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| 32. |
Write the working principle of Fire Extinguisher.(Class VII) |
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Answer» Fire extinguishing WORKS on the principle of cutting off the supply of oxygen to the fire and BRINGING down the temperature Explanation: mark me as brainliest |
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| 33. |
विपत्ति में अपनी ही संपत्ति क्यों काम आती है? |
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Answer» विपत्ति एक व्यक्ति को मनुष्यता की पहचान दिलाती है। परंतु संपत्ति एक व्यक्ति को सिर्फ और सिर्फ लालची और स्वार्थी बनाती है। ... इसलिए विपत्ति संपत्ति से ज्यादा महत्वपूर्ण है। |
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| 34. |
Dont answers hajansjxjdjdnxxnnx |
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Answer» Answer: what is this?? you aap question puchne KEY LIYE HAI na ki FALTU kamo key liye |
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| 35. |
Please help anyone! urgent... answer please |
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| 36. |
How much work should be done on a bycycle of mass 20 kg to increase its speed from 2ms_1 to 5ms_1 |
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Answer» fffffffuuuuuuccccckkkkkk |
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| 37. |
10, p, 9, 8, a, Ii-এর গড় মান 12 হলে p + q-এরমান নির্ণয় করাে। |
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Answer» Answer: |
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| 38. |
Define the low of constant proportion. |
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Answer» LAW of constant proportion states that a chemical compound ALWAYS contains exactly the same proportion of elements by mass. For a given unique chemical compound, its elemental composition is same for any sample that exists. ... If we TAKE some mass of water, 8/9 of its mass will be oxygen and 1/9 will be HYDROGEN. |
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| 40. |
What happens when sodium hydroxide reacts with copper sulphate |
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Answer» Answer: Copper sulphate reacts with SODIUM hydroxide to FORM a BLUE precipitate of copper hydroxide and sodium sulphate. In an EXPERIMENT, 15.95 G of copper sulphate reacted with 8.0 g of sodium hydroxide to form 9.75 g of copper hydroxide and 14.2 g of sodium sulphate. |
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| 41. |
What do the symbols H,N,O3 mean in the formula of HNO3. |
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Answer» Explanation: H means 1 atom of hydrogen N means 1 atom of nitrogen O means 3 atom of oxygen A MOLECULE is DEFINED as two or more atoms of the same ELEMENT or DIFFERENT element that are bound together. |
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| 42. |
State whiche can be used as supplementCalcium and iron are obtaned from_____ |
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| 43. |
(9) Benzaldehyde does not show positive test with(a) Schiff reagent(b) Tollen's reagent(c) Fehlin solution(d) Sodium bisulphite solution |
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Answer» Answer: Aldehydes such as benzaldehyde, lack alpha hydrogens and cannot FORM an enolate and thus do not give a positive test with Fehling's solution which is comparatively a WEAKER oxidizing agent than Tollen's reagent, under USUAL conditions. Therefore, it tests negative So, the answer is (C)...Hope it will help you....don't forget to LIKE and follow my account |
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| 44. |
The enthalpy of 1kg of steam at 70bar pressure is 2680KJ/kg.what is the condition of steam?? |
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Answer» HIII how are you |
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| 45. |
Electromagnetic radius wave length is --- |
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Answer» Answer: The ELECTROMAGNETIC SPECTRUM (EMS) is the general NAME given to the known range of electromagnetic radiation. Wavelengths increase from APPROXIMATELY 10-18 m to 100 km, and this corresponds to frequencies decreasing from 3 × 1026 HZ to 3 ×103 Hz. Hope it helps you |
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| 46. |
78.Write the names and structures of the monomers of the followingpolymers:(a) Nylon-6(b) Novolac(c) Buna-N |
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Answer» the answer is Buna-N Explanation: it HELP you |
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| 47. |
Chemically rust is: 1(a) Hydrated ferrous oxide(b) Hydrated ferric acid(c) Only ferric oxide(d) None of these |
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Answer» NONE of these Explanation: |
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| 48. |
Metals and non-metalsу ) Homogeneous① liquids2alloys 3 gases . |
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| 49. |
Identify the example of fluorescent substance |
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Answer» RUBIES , Emeralds, DIAMONDS are EXAMPLES of fluorescent SUBSTANCE. |
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| 50. |
Ta) Heat of adsorption is greater for chemisorption than forphysisorption. Why?(b) Mention two common properties of sol and emulsions.(c) Differentiate between electrophoresis and electroasmosis |
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Answer» यभरठडठरडश्रडदवभभलभभ्मलभझ्ठलब़भ है बनता जा रहा हूं कि |
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