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 reaction order each of the following rate constant..1) 1.4 ×10 ^-5 mol^ -1 L s^-1 2) 2.3 ×10^-4 s^-1 |
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| 2. |
Hi.... Pls help me friends....Can u pls tell me what are reagents....Define and give examples....Thanks for help....Follow me....Stay home stay safe....Jai Siyaram Ji.... |
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Answer» substance or MIXTURE for use in CHEMICAL analysis is called reagents ex: ThoughtCo Examples of reagents include Grignard reagent, Tollens' reagent, Fehling's reagent, COLLINS reagent, and Fenton's reagent. However, a substance MAY be used as a reagent without having the word "reagent" in its name.PLEASE MARK AS BRAINLIEST PLEASE PLEASE AND FOLLOW ME AND FOLLOW U AND MARK AS BRAINLIEST |
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| 3. |
What is iter??????????? |
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Answer» the GIVEN ATTACHMENT.....! |
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| 4. |
What is the mass of 1 mole of copper (Cu)? please answerrr |
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Answer» 63.546 G AVOGADRO's Number (1 mole=6.022×1023particles) and the relative ATOMIC mass of COPPER (1 mole of copper = 63.546 g) are the equalities required to make this conversion.Explanation:plzz mark me as the brainlest |
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| 5. |
Write a mathematical expression showing the relationship between the amount of solute adsorbed per unit mass of the solid adsorbent and the concentration of the solute in the solution. |
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Answer» k the ANSWER to this answer your name on the list when ever your ready to go in to work TOMORROW morning r the other one I sent you is the answer to the question is what are enjoying every question about a month ago and I was like you know the EXACT amount was CHANGED the time |
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| 6. |
What are promoters? Give an example. |
| Answer» PROMOTER is any component ADDED to a CATALYST to increase activity or selectivity. EXAMPLES are tin added to platinum reforming catalysts to improve selectivity to coke formation and chloride added to isomerization catalysts to increase activity.Explanation:HOPE helpfulmark as brainliestfollow me | |
| 7. |
What is the drawback of Freundlich Adsorption Isotherm. |
| Answer» LIMITATIONS of Freundlich Isotherm: Freundlich isotherm only approximately explains the behaviour of adsorption. The value of 1/n can be between 0 and 1, therefore the EQUATION holds GOOD only over a limited RANGE of pressure. When 1/n = 0, x/m is constant, the adsorption is independent of pressure.Mark me brainliest pls | |
| 8. |
Which has a higher enthalpy of adsorption, physisorption or chemisorption? [AI 2013] |
| Answer» CHEMISORPTION has a higher enthalpy of adsorption. ... The FORCES of ATTRACTION between adsorbent and adsorbate are of Van der Waals type (WEAK forces).Pls mark me BRAINLIEST | |
| 9. |
Physisorption is reversible while chemisorption is irreversible. Why? [Foreign 2015] |
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Answer» tion:AUTOMATED reactor systems for single-phase or multi-phase REACTIONS. Automated packed-bed benchtop REACTORS. Automated CHEMISORPTION. In-situ chemisorption. Automated physisorption. CUSTOMIZED Chemisorption |
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| 10. |
Why is chemisorption referred to as activated adsorption? |
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Answer» Automated REACTOR SYSTEMS for single-phase or multi-phase reactions. Automated packed-bed benchtop reactors. Automated chemisorption. Customized Chemisorption. Automated PHYSISORPTION. In-situ chemisorption |
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| 11. |
What is the effect of temperature on chemisorption? [AI2015 Panchkula; DoE] |
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Answer» Chemisorption INVOLVES formation of chemical BONDS. With increase in temperature, number of molecules having ENERGY equal to or GREATER than activation energy increases. HENCE, the extent of chemisorption increases. |
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| 12. |
What type of forces are responsible for the occurrence of physisorption? [Foreign 2015] |
| Answer» TION:CHEMISORPTION involves formation of chemical bonds. With increase in temperature, number of MOLECULES having energy EQUAL to or greater than ACTIVATION energy increase | |
| 14. |
Freundlich isotherm becomes independent of pressure at high pressure for a gas absorbed on a solid. Give reason. [Uttarakhand 2019] |
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Answer» tion:Freundlich GAVE an empirical relationship between the quantity of gas adsorbed by a unit MASS of solid adsorbent and PRESSURE at a PARTICULAR temperature |
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| 15. |
Out of NH3 and N2, NH3 gas will be adsorbed more readily on the surface of charcoal. Why? |
| Answer» TION:NH3 is polar and N2 is non polar. Hence VAN DEAR Waal forces of ATTRACTION in ammonia are higher than nitrogen. Thus ammonia will be adsorbed more readily on the SURFACE of charcoal | |
| 16. |
Why do physisorption and chemisorption behave differently with rise in temperature? |
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Answer» Physisorption involves weak van der Waals' forces which weakens with INCREASE in temperature. Chemisorption involves formation of chemical bond which REQUIRES activation ENERGY hence, it is FAVOURED by RISE in temperaturePls mark me brainloest |
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| 17. |
The SI unit of calorific value of solid fuel |
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Answer» Joule/Kg The SI UNIT (INTERNATIONAL SYSTEM of UNITS) of calorific value is Joule/Kg or Kilo Joule/Kg. The SI unit is only one . So the answer is kJ/kgExplanation: |
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| 18. |
What is meant by chemisorption? [Delhi 2011(C)] |
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Answer» can't UNDERSTAND this QUESTION SORRY dudeExplanation: |
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| 20. |
What is the carrer job opportunities/higher education in msc physical chemistry |
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Answer» tion:M.Sc. Physical Chemistry is a 2-year post-graduation course in Chemistry program. The course spans for a duration of 2 years, the eligibility of which is to qualify B.Sc. in Science after 12TH grade along with majors in Chemistry with a MINIMUM aggregate of 50% marks and above from a recognized UNIVERSITY LISTED under UGC/AIU. |
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| 21. |
8. Among the following the most highly ionised (1) CH2CH2CHCICOOH(2) CH CH CCI2COOH(3) CH2CHCICH2COOH(4) CH2CICH2CH2COOH |
| Answer» PLEASE FOLLOW me and MAKE this ANSWER brainlest.Explanation:3 is the most HIGHLY ionised | |
| 23. |
how does the electric flux changes when a balloon is blown and its size increases. if the electric flux is 29. what is the new flux. |
| Answer» ELECTRIC CURRENT is DUE to FLOW of CHARGES. | |
| 24. |
What is meant by desorpton? |
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Answer» to GO EVERYTHING is HO 1 |
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| 25. |
Enzyme work at specific pH and optimum temperature. [True/False] |
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Answer» Hey mateit's TRUE nd it's a line from NCERT class11BioLogyin chapter BIOMOLECULESI HOPE my answer helps youif U LIKE my answer mark it as brainliest ONE |
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| 26. |
What is sorption? [Foreign 2013] |
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Answer» n is a physical and chemical process by which ONE substance becomes attached to another. Specific cases of sorption are treated in the following articles:Absorption – "the incorporation of a substance in one state into another of a DIFFERENT state"[1] (e.g., liquids being absorbed by a solid or GASES being absorbed by a liquid);Adsorption – the physical adherence or bonding of ions and molecules onto the surface of another phase (e.g., reagents adsorbed to a solid catalyst surface);Ion exchange – an exchange of ions between two electrolytes or between an ELECTROLYTE solution and a complex. |
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| 28. |
Electrokinetic potential is difference in potential of fixed layer and diffused layer which are oppositely charged. [True/False] |
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Answer» The combination of the two LAYERS of opposite charges around the colloidal particle is called a Helmholtz electrical DOUBLE layer. ... This POTENTIAL difference between the FIXED layer and the diffused layer of opposite charges is called the electrokinetic potential or ZETA potential. |
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| 29. |
H2 gas is adsorbed on activated charcoal to a very little extent in comparison to easily liquefiable gases due to. [NCERT Exemplar] (a) very strong van der Waal’s interaction. (b) very weak van der Waals forces. (c) very low critical temperature. (d) very high critical temperature. |
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Answer» (ii) very WEAK VAN DER Waals FORCES. (iii) very low CRITICAL temperature......plzzz mrk brainlist.. |
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| 30. |
Greater the valency of ion, more will be coagulating power is __________ rule. |
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Answer» Hardy-Schulze LawExplanation:ACCORDING to them, the greater the valency of the active ion, greater is the POWER to CAUSE COAGULATION. Active ion is responsible for coagulation.In the case of negatively charged sols (As2S3 is negative sol), the coagulation power is in order ofAl+3>Ca+2>NA+ |
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| 31. |
Blue , black , white and green vitrol formulas |
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Answer» pric SULFATE;black-ferrous sulfatewhite-zinc sulfategreen-copperas |
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| 32. |
Note: In the following questions two or more options may be correct. Which of the following statements are correct about solid catalyst? [NCERT Exemplar] (a) Same reactants may give different product by using different catalysts. (b) Catalyst does not change AH of reaction. (c) Catalyst is required in large quantities to catalyse reactions. (d) Catalytic activity of a solid catalyst does not depend upon the strength of chemisorption. |
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Answer» a and B are CORRECT Explanation:In some REACTIONS, same reactants may give different PRODUCTS by using different catalysts. A catalyst doesn't CHANGE heat of reaction because the activation energy of both forward and backward reactions are affected equally by the catalyst. |
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| 33. |
Lead chamber process for H2S04 manufactureis homogeneous catalysis. [True/False] |
| Answer» TRUE BRO is the ANSWER bro | |
| 34. |
__________ of kidney separates waste products from blood. |
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Answer» which is the structural and functional UNIT of the kidney separates WASTE PRODUCTS from BLOOD. |
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| 35. |
In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices. (a) Assertion and reason both are correct and the reason is correct explanation of assertion. (b) Assertion and reason both are correct but reason does not explain assertion. (c) Assertion is correct but reason is incorrect. (d) Both assertion and reason are incorrect. (e) Assertion is incorrect but reason is ’ correct. Assertion: An ordinary filter paper impregnated with collodion solution stops the flow of colloidal particles. Reason: Pore size of the filter paper becomes more than the size of colloidal particle. [NCERT Exemplar] |
| Answer» HI GUYS I etetteyr the right regards to the same day as the registered player whether the use of the day of the day of school for girls in high resolution for free and open to all of the day before yesterday but no one is in my life with you on the other day that I have to explain exactly what We have received your email and any attachment is confidential email from your system without making any CHANGES or corrections and suggestions for what we have a NICE day with a while W | |
| 36. |
An emulsifier is a substance which (a) stabilises the emulsion. (b) homogenises the emulsion. (c) Coagulates the emulsion. (d) Accelerates the disperson of liquid in liquid. |
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| 37. |
Certain data regarding various gases kept under the same conditions of temperature and pressure are given below. Find P and Q (options....).P=2y, Q=10L.P=y, Q=5L.P=y/2, Q=20L.P=y/4, Q=10L |
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| 38. |
IUPAC name please... |
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Answer» (2,3 - Diethyl - 2,3,4,4 - TETRAMETHYL)-HEXANE is the IUPAC name.I hope it HELPS U my frnd |
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| 39. |
Write the chemical equations for the reactions taking place when : 1) Sodium sulphate reacts with barium chloride 2) Ferrous sulphate is heated |
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Answer» 1) NASO4 + Bacl2 ----> Nacl2 + Baso42) FESO4 ----> Fe2O3 + SO2 + SO3hope it helps.......♥️ |
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| 41. |
Which of the following is not an endothermic process? A. Fusion B. Vaporisation C. Temperature D. Insoluvle heavy impurities |
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| 42. |
⏩Chemistry⏪..Explain Limitation of Thermodynamics?..#Quality_Answers_Needed#Spamers_stay_away |
| Answer» IONS of First Law of ThermodynamicsThe limitation of the first law of thermodynamics is that it does not say anything about the direction of FLOW of heat. It does not say anything whether the PROCESS is a SPONTANEOUS process or not. The reverse process is not possible.i took from google but I think it HELP u a lotHAVE A GREAT DAY AND Ni8 | |
| 43. |
Q1 A B AND C ARE THE ELEMENTS OF A DOBEREINER'S TRIAD IF THE ATOMIC MASS OF A IS 7 AND THAT C IS 39.what should be the atomic mass of B? Q2 WHY WAS DOBERREINERS TRIED DISCARDED? |
| Answer» 1. 7+39/2= B46/2=BB= 23 | |
| 44. |
Peptization is a process of (a) precipitation of colloidal particles. (b) purification of colloids. (c) dispersing precipitate into colloidal solution. (d) movement of colloidal particles in the electric field. |
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Answer» (C) DISPERSING PRECIPITATE into COLLOIDAL solutions.Hope it HELPS you. |
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| 45. |
Lyophillic colloids are stable due to (a) charge on the particles. (b) large size of the particles. (c) small size of the particles. (d) layer of dispersion of medium on the particles. |
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Answer» iend ! ☺Here's your answer : Lyophillic colloids are stable due to(a) charge on the particles.Reason : The POSITIVE and NEGATIVE CHARGES in colloid make it stable as the charges cancel each other .____________________________Thank you ! ♠Doubts are most WELCOME :) |
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| 46. |
Which shape selective catalyst is used to convert alcohol to gasoline? (a) Trpsin (b) Calgon (c) ZSM-5 (d) Zeigler-Natta catalyst |
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| 47. |
According to adsorption theory of catalysis, the speed of the reaction increases because (a) the concentration of the reactant molecules at the active centres of the catalyst becomes high due to adsorption. (b) in the process of adsoption, the activation energy of the molecules becomes large. (c) adsorption produces heat which increases the speed of the reaction. (d) adsorption lowers the activation energy of the reaction. |
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Answer» hey mate here is your answer ❤️The correct answer is D . In the PRESENCE of catalyst the speed of reaction increases SINCE the activation energy GETS reduced and hence the rate of ADSORPTION increases.hope it helps you ❤️mark me as brainlist ❤️ ❤️❤️ |
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| 48. |
In which of the following reactions heter-ogenous catalysis is involved? [NCERT Exemplar] (a) (ii), (iii) (b) (ii), (iii), (iv) (c) (i), (ii), (iii) (d) (iv) |
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Answer» The answer of this question is option (i)Explanation:Heterogenous catalyst is the type of catalyst, whose physical state (SOLID, liquid, aqueous, gas) is not same as reactants and PRODUCTS.Heterogenous catalyst is the type of catalyst, whose physical state (solid, liquid, aqueous, gas) is not same as reactants and products.For reaction (a), catalyst NO(g) is in the same physical state or phase with the reactants and products which are in gas phase. So (a) here heterogeneous CATALYSIS is not involved. So (iii) is wrong.Heterogenous catalyst is the type of catalyst, whose physical state (solid, liquid, aqueous, gas) is not same as reactants and products.For reaction (a), catalyst NO(g) is in the same physical state or phase with the reactants and products which are in gas phase. So (a) here heterogeneous catalysis is not involved. So (iii) is wrong.For (d), the catalyst HCL(l) is in same phase with all the reactants and products which are in either liquid or aqueous phases. So this is also not heterogeneous catalysis.Heterogenous catalyst is the type of catalyst, whose physical state (solid, liquid, aqueous, gas) is not same as reactants and products.For reaction (a), catalyst NO(g) is in the same physical state or phase with the reactants and products which are in gas phase. So (a) here heterogeneous catalysis is not involved. So (iii) is wrong.For (d), the catalyst HCl(l) is in same phase with all the reactants and products which are in either liquid or aqueous phases. So this is also not heterogeneous catalysis.Therefore, option (ii) and (iv) are also wrong.Heterogenous catalyst is the type of catalyst, whose physical state (solid, liquid, aqueous, gas) is not same as reactants and products.For reaction (a), catalyst NO(g) is in the same physical state or phase with the reactants and products which are in gas phase. So (a) here heterogeneous catalysis is not involved. So (iii) is wrong.For (d), the catalyst HCl(l) is in same phase with all the reactants and products which are in either liquid or aqueous phases. So this is also not heterogeneous catalysis.Therefore, option (ii) and (iv) are also wrong.In (b), catalyst Pt(s) is an heterogeneous catalyst, because it is not in same phase with the reactant SO2(g) and the product SO3(g).Heterogenous catalyst is the type of catalyst, whose physical state (solid, liquid, aqueous, gas) is not same as reactants and products.For reaction (a), catalyst NO(g) is in the same physical state or phase with the reactants and products which are in gas phase. So (a) here heterogeneous catalysis is not involved. So (iii) is wrong.For (d), the catalyst HCl(l) is in same phase with all the reactants and products which are in either liquid or aqueous phases. So this is also not heterogeneous catalysis.Therefore, option (ii) and (iv) are also wrong.In (b), catalyst Pt(s) is an heterogeneous catalyst, because it is not in same phase with the reactant SO2(g) and the product SO3(g).Similarly in (c), catalyst Fe(s) is an heterogeneous catalyst, because it is not in same phase with the reactant N2(g), H2(g) and the product NH3(g).Heterogenous catalyst is the type of catalyst, whose physical state (solid, liquid, aqueous, gas) is not same as reactants and products.For reaction (a), catalyst NO(g) is in the same physical state or phase with the reactants and products which are in gas phase. So (a) here heterogeneous catalysis is not involved. So (iii) is wrong.For (d), the catalyst HCl(l) is in same phase with all the reactants and products which are in either liquid or aqueous phases. So this is also not heterogeneous catalysis.Therefore, option (ii) and (iv) are also wrong.In (b), catalyst Pt(s) is an heterogeneous catalyst, because it is not in same phase with the reactant SO2(g) and the product SO3(g).Similarly in (c), catalyst Fe(s) is an heterogeneous catalyst, because it is not in same phase with the reactant N2(g), H2(g) and the product NH3(g).So both (b) and (c) are the examples of heterogeneous catalysed reactions.Therefore option (i) is the correct.I hope you got your answer mark as a brainlieastThanks |
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| 49. |
The potential difference between the fixed charged layer and the diffused layer having opposite charge is called (a) Zeta potential (b) Electrokinetic potential (c) Both (a) and (b) (d) Streaming potential |
| Answer» B) ELECTROKINETIC POTENTIAL | |
| 50. |
Calcium benzoate on dry distillation gives ? |
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Answer» tion:Dry distillation of a MIXTURE of calcium ACETATE and calcium BENZOATE gives ACETOPHENONE. |
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