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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. |
(a) Derive a relation, delta H = delta U + delta nRT.(b) Why is + 3 oxidation state stable in heavier element of group 152 |
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Answer» nnhsdvjksdbkcbb cfffxxj Explanation: fjtj vhkgggthtjy yneahffjtnyfigjynfjf |
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| 2. |
Write the formula of oxides, sulphates,chlorids,carbonates of sodiummagnesiumAluminium |
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Answer» Answer: Oxides... SODIUM oxide....NaO Magnesium oxide....MgO Aluminum oxide...Al2O3 Sulphates... Sodium sulphate....Na2S04 Magnesium sulphate .....MgSO4 Aluminium SULFATE...Al2SO4 Chlorides Sodium chloride.....NaCl Magnesium Chloride....MgCl2 Aluminium chloride....AlCl3 Carbonates.... Sodium carb....Na2CO3 magnesium carb.....MgCO3 Aluminium CARBONATE....AL2(CO3)3 mark me the brainliest....also thanks aditya9818 |
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| 3. |
What is friedel craft reaction not probit in presence of moisture? |
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Answer» Answer: FriedelCrafts alkylation involves alkylation of an AROMATIC ring with an ALKYL halide using a strong Lewis ACID catalyst. With anhydrous ferric chloride as a catalyst, the alkyl group attaches at the former site of the chloride ion. Due to strong -I & -M effect of $$-NO_2$$ & $$-N^+Me_3$$ group, the electron density of BENZENE decreases and ELECTROPHILIC substitution become difficult. In case of aniline, it acts as a base and reacts with Lewis acid; and formation of cation become difficult and reaction doesn't happen. |
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| 4. |
Corinate atomicity of the following: P4,S8,Cl2,H2,H8. |
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Answer» P4 atomicity is 4 are called polyatomic s8 atomicity is 8 are called polyatomic o2 atomicity is 2 are called diatomic n2 atomicity is 2 are called diatomic fe atomicity is 1 are called monaatomic zn atomicity is 1 are called monaatomic Explanation: |
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| 5. |
Diff between bathing soap and washing soap |
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Answer» both are BASICALLY same and used for WASHING...BTW which SUBJECT QUESTION is this? |
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| 6. |
Diff between washing sod and bathing soda |
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Answer» it MUST be BAKING SODA and not BATHING ... plz correct the question |
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| 7. |
How is the temperature differences between day and night reduced by greenhouse gases? |
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Answer» The layer of AIR just above the ground is known as the boundary-layer, and it is ESSENTIALLY separated from the REST of the atmosphere. At night this layer is very thin, just a few HUNDRED METERS, whereas during the day it grows up to a few kilometres. It is this cycle in the boundary-layer depth which makes the night-time temperatures more sensitive to warming than the day. #Sumedhian❤❤ |
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| 8. |
Write the conjugate base for H3PO4 |
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Answer» Answer: The CONJUGATE base of H3 PO4 is H2 PO4 -1. The REMOVAL of ONE hydrogen ION gives the conjugate base a -1 charge. |
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| 9. |
Define chemical reaction. |
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Answer» Here is your answer... ☺️☺️☺️ ➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡➡ CHEMICAL reaction, a process in which one or more SUBSTANCES, the reactants, are converted to one or more different substances, the products. Substances are either chemical ELEMENTS or COMPOUNDS. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products. ✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔✔ I hope this answer is helpful to u...❤❤❤ Keep ASKING... ✌️✌️✌️ ✨✨✨If help u. Mark my answer as brainliest✨✨✨ #N. H. Khan |
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| 10. |
In a compound carbon and hydrogen are present in a ratio 3 : 1 by mass. Find out the molecular formula of the compound. (Atomic mass. of C= 12 u, Atomic mass of H = 1 ) |
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Answer» ANSWER:CH3 Explanation: |
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| 11. |
How do agriculture and industrial waste contribute to water pollution |
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Answer» Explanation: 1️⃣By releasing their WASTE EFFLUENTS into the river water.2️⃣By using excessive pesticides on the agricultural land.3️⃣Labour working in the INDUSTRIES also throw their PERSONAL waste into the river and pollute it... |
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| 12. |
Name the yellow substance kept on your kitchen shelf that turns reddish brown in alkaline solution but remains yellow in acidic and neutral solutions, |
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Answer» Turmeric Explanation: PLZZ MARK it as the BRAINLIEST answer |
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| 13. |
How to agricultural and industrial waste contribute to water pollution?(solve with full explanation ) |
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Answer» Answer: Developing means of farming and agriculture is the REASON humans live in the world they do today. It is a necessary means of SURVIVAL, without which there would be famines all over the world. For thousands of years, agricultural was a natural process that did not harm the land it was done on. In fact, farmers were able to pass down their land for many GENERATIONS and it would still be FERTILE as ever. However, modern agricultural practices have started the process of agricultural pollution. This process CAUSES the degradation of the ecosystem, land, and environment due to the modern-day by-products of agriculture. Explanation: have a good day |
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| 14. |
Co isEnthalpy for the reaction cto,(a) positive (b) negative(6) zero(d, none |
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| 15. |
How is possible chlorine in benzene ring? |
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Answer» ANSWER: As a chlorine MOLECULE approaches the benzene ring, the delocalised electrons in the ring repel electrons in the chlorine-chlorine bond. It is the slightly positive end of the chlorine molecule which acts as the electrophile. The PRESENCE of the aluminium chloride HELPS this polarisation. Explanation: |
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| 16. |
What happens when, balence and giveObservations :-. ,I) Blue vitriol crystals are heated? II) Dilute HCl is added to marble chips?#Please quickly answer me guisééééé |
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Answer» Answer: Explanation: 1 .Blue vitriol is HYDRATED copper sulphate when it is heated water of crystalization escapes from Crystals and anhydrous copper sulphate (CuSO4) without any water of crystalization.. 2. It should be DILUTE hydrochloric acid added to marble, right? Ok, it is a simple reaction. Hydrochloric acid reacts with marble, which is made up of calcium CARBONATE, to FORM calcium chloride, water, and carbon dioxide. 2HCl(aq) + CaCO3(s) → CaCl2(aq) + H2O(l)+CO2(g) The carbon dioxide can then be passed to limewater to test (which would turn it into calcium carbonate again) READ more on Brainly.in - brainly.in/question/7649067#readmore |
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| 17. |
Define enthalpy of dilution |
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Answer» Answer: The heat of dilution, or enthalpy of dilution, refers to the enthalpy change associated with the dilution PROCESS of a component in a solution at a constant pressure. If the initial state of the component is a pure liquid (presuming the solution is liquid), the dilution process is equal to its dissolution process and the heat of dilution is the same as the heat of solution. GENERALLY, the heat of dilution is NORMALIZED by the mole NUMBER of the solution and its dimensional units are energy PER unit mass or amount of substance, commonly expressed in the unit of kJ/mol (or J/mol). Explanation: |
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| 18. |
Hello mitroMy program is not being executed.... see where is the defect...??? plz help... |
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Answer» what are you SAYING I don't UNDERSTAND what you |
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| 19. |
Radon isA. germon radioB. inert gasC. artificial fibreD. an explosive |
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| 20. |
Write the symbols of :cobalt,mangnese,lead,copper,tin,mercury. |
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Answer» Answer: Cobalt - Co, Manganese - Mn, Lead - PB, Copper - Cu, Tin - Sn, Mercury - Hg. These are the symbols of the elements mentioned above. Hope it helps you! Please like and mark the brainliest ❤️ |
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| 21. |
What you mean by polyatomic ions |
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Answer» Explanation: ✔✔✔➪➪Polyatomic IONS are ions which consist of more than one atom. For example, NITRATE ion, NO3-, contains one nitrogen atom and THREE oxygen atoms. The atoms in a polyatomic ion are usually covalently BONDED to one another, and therefore STAY together as a single, charged unit.✔✔✔✞✞✞ |
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| 22. |
5 - (2 - Ethyl butyl) – 3, 3 - dimethyldecane |
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Answer» I can’t UNDERSTAND your QUESTION PLEASE EXPLAIN it BRIEFLY |
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| 23. |
Answe bta do iska koi...class 12 |
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Answer» 3 BROOM ,2 CHLORO , 4METHYL hex 1-oic 4-nitro 1 chloro ,5-methyl hex-one |
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| 24. |
कौनसा एक लुइस अम्ल नहीं है ?(अ) AICI . (ब) SbFs(स) SO2(द) CN- |
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| 25. |
1)Water which sprinkles from the earth's crust2)Water present on the earth's surface |
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Answer» I can’t UNDERSTAND your question PLEASE explain it BRIEFLY |
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| 26. |
40 points...class 12 |
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Answer» 1. 2-chloro-3-bromo-4-nitro-4-ethylpentoicacid 2. 1-chloro-5-methyl hexan-2-one |
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| 27. |
44. What happens when ethylene is passed throughcold dilute alkaline potassium permanganate. |
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| 28. |
Differentiate between valence bond theory and molecular orbital theory... |
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Answer» Answer: Valence theory explains about molecules occupying atomic ORBITALS whereas molecular orbitals theory explains about the mixing of atomic orbitals when FORMING molecules. ... In valence bond theory, the resulting molecular orbital is OBTAINED by the combination of TWO wave functions of two unpaired ELECTRONS. |
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| 29. |
Convert the 45 C into F scale |
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Answer» |
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| 30. |
Which one of the following gases is readily soluble in water at room temperature?A. chlorineB. nitrogenC. ammoniaD. carbon dioxide |
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| 31. |
1. Write the mechanism of action of halogen acid on ether |
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Answer» Answer: Hi Mattee!!Explanation: Acidic cleavage of ethers (SN2) Description: When ethers are treated with strong ACID in the presence of a nucleophile, they can be cleaved to give alcohols and alkyl halides. If the ether is on a primary carbon this may occur through an SN2 pathway. Notes: Common acids for this purpose are HI and other hydrogen halides, as well as H2SO4 in the presence of H2O. In the case where the ether being cleaved is secondary and has a stereocenter, there will be inversion of configuration. Examples: Notes: The third example could also be WRITTEN “H3O+” Mechanism: Strong acid (HI) protonates the ether oxygen, which turns it into a better leaving group (Step 1, arrows A and B). Next, the iodide ion attacks the carbon in an SN2 reaction (Step 2, arrows C and D) to give the alcohol and methyl iodide. cleavage of phenyl methyl ether anisole through reaction with hi GIVES PHENOL plus ch3i via sn2 reaction at methyl Notes: In cases where the ether being cleaved is secondary and has a stereocenter, there will be inversion of configuration. Another example: Opening of TETRAHYDROFURAN (THF) with aqueous acid: cleavage of cyclic ether thf with strong aqueous acid gives 1 4 butane diol |
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| 32. |
The IUPAC name of CH3 CO CH(CH3)2 is. |
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Answer» Answer: 3-methylbut-2-one Explanation: |
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| 33. |
What is the empirical formula unit ofA) Pb 92.8% and O=7.2%B) Na= 43.4%. Carbon=11.3%. Oxygen =45.3%C) Potassium = 42.4%. Iron =15.2% Carbon= 19.5%. Nitrogen=22.8% |
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Answer» Answer: Formula unit. A formula unit in chemistry is the empirical formula of any ionic or covalent network solid compound used as an INDEPENDENT ENTITY for stoichiometric CALCULATIONS. It is the lowest whole NUMBER ratio of ions represented in an ionic compound. BRAINLIEST MAT BHOOLNA DOOD |
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| 34. |
A spoon of glucose jas a mass of 90g. 1 )how many moles are present in it. 2 )how many particles are present in it. |
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Answer» Answer: Explanation: ur answer 1). 9 mole are PRESENT in it. |
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| 36. |
ER(Write Nernst equation.) |
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Answer» ER= ENDOPLASMIC RETICULAM PLEASE MARK IT AS BREANLYEAST |
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| 37. |
How many possibilities are there in equilibrium state? |
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Answer» Answer: three POSSIBILITIES three possibilitiesAt any moment in TIME, there are three possibilities. 1. Qc is smaller than Kc. The system contains too much REACTANT and not ENOUGH product to be at equilibrium. |
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| 38. |
molarity of solution depends on a) temperature b) nature of solid dissolved c)mass of solvent d) pressure |
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Answer»
. (a) Temperature . HOPE IT HELPS YOU...!! |
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| 39. |
45. A stock solution of sodium hydroxide has aconcentration of 5.00 M. How many mL of it are requiredto make 355 mL of a 1.35 M solution? |
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Answer» Explanation: zikzoka is sia aoa aos sis is aka aja aj aia ai and and I will be there at any time and I will be there at any time and I will be there at any time and I will be there at 2 35 I will GIVE it a while back but it went ok and you have to GO school today and tomorrow and the NEXT question come over for DINNER I can get it is showing as |
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| 40. |
WHAT IS A WASTE WATER TREATMENT PLANT ??? |
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Answer» Answer: Heya here is your answer MATE....❤ A wastewater treatment plant is a FACILITY in which a combination of VARIOUS processes are used to treat INDUSTRIAL wastewater and remove pollutants.. |
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| 42. |
HThe correct IUPAC name of[ ]a) ethanedialob) 2-ketopropanalc)2,3-Butane dione d) ethane dione who answers correct Mark as brainliest |
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Answer» EXPLANATION:C)2,3-Butane DIONE |
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| 43. |
250ml of a solution contains 2.65 grams of Na2CO3. 10ml of this solution is added yo x ml of water to obtain 0.001M Na2CO3 solution. the value of x in ml?a)1000 b)990c)9990d)90please answer.............guys please answersolve and keep photo |
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Answer» Explanation: |
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| 44. |
Define Magnetic quantum number |
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Answer» The National Education Policy was framed in 1986 and modified in 1992. More than three decades have passed since previous Policy. During this period significant changes have taken place in our country, society economy, and the world at large. It is in this context that the education sector needs to gear itself towards the demands of the 21st Century and the needs of the people and the country. Quality, innovation and research will be the pillars on which India will become a knowledge super power. Clearly, a new Education Policy is needed. The Government had initiated the process of formulating a New Education Policy through the consultation process for an inclusive, participatory and holistic approach, which takes into consideration expert opinions, field EXPERIENCES, EMPIRICAL research, stakeholder feedback, as well as lessons learned from best practices. A special meeting of CABE on National Education Policy was held.’ In the meeting, 26 Education Ministers of VARIOUS States and UTs, representatives of States and Union Territories, Members of CABE, Heads of Autonomous Organisations, VICE Chancellors of Universities, attended the meeting along with senior officials of the Central and State Governments. Around 2 lakh suggestions on the Draft National Education Policy received from various stakeholders. A meeting on Draft NEP 2019 of PARLIAMENTARY Standing Committee on Education was held on 07.11.2019. |
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| 45. |
In S04 one sulfur atoms needs 6 atoms to become stable ryt but only gets 4 electrons from oxygen what about other 2 electrons |
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Answer» Answer: EXPLANATION: Oxygen ATOMS need two electrons to attain stable ELECTRONIC configuration of the NEAREST noble gas |
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| 46. |
10.Which of the following pointstatements is not trueabout an atom?Atoms are not able to existindependentlyAtoms are the basic units fromwhich molecules and tons areformedAtoms are always neutral innatureAtoms aggregate in largeO numbers to form the matterthat we can see, feel or touch |
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Answer» Answer: A part Explanation: ATOMS can exist independently for eg. atoms of inert GASES LIKE HELIUM,Argon etc. |
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| 47. |
The heat of combustion of ethene from the givendata isCH2= CH2(g) + 3O2(g) === 2CO2(g) + 2H2O(l)Bond Bond energy C = C x kJ/molC-H y kK/molO = O z kJ/molC = 0 a kJ/molO-H b kJ/mol(1) x - a + b + 4y - 3z(2) x + b - 3z + a + 4y(3) x + 4y + 3z - 4(a + b)(4) a + b - (x + 4y + 3z) |
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Answer» ANSWER: what is taxa hiii how are you CUTE princesss Explanation: |
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