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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. |
Bsc 2 nd year chemistry notes |
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Answer» qvavsbsExplanation:hshshsbsbs |
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| 2. |
To make a saturated solution 36g of sodium chloride is dissolved in 100g of water at 293k.find it's concentration at this temperature. |
| Answer» NCENTRATION at this TEMPERATURE. | |
| 3. |
What is oxidation number of Ni in [Ni(CO2)(H2O)] plz ans correctly don't waste points |
| Answer» OXIDATION Number in [NI(CO2)(H2O)] is +4 | |
| 4. |
Q.9. Molecules which have permanent dipole are known as…… |
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| 5. |
Theandhave full outerelecton shells which makes the inert or non reactive |
| Answer» MARK me BRAINLIEST PLZ THANKS for your HELP | |
| 6. |
The equation for rate constant is k = Ae-Ea/RT. A chemical reaction will proceed more rapidly if there is a decrease in; kAET |
| Answer» TION:Rate of reaction ∝KMore rapid reaction, K MUST be increased.K=A e −Ea/RT K will INCREASE by A↑,Ea↓,T↑.So, Ea factor should register a decrease for the reaction to proceed more rapidly. | |
| 8. |
The following sequence of reactions occurs in the commercial production of aqueous nitric acid: 4NH3(g)+5O2(g)⟶4NO(g)+6H2O(l)ΔH=−907kJ 2NO(g)+O2(g)⟶2NO2(g)ΔH=−113kJ 3NO2+H2O(l)⟶2HNO2(aq)+NO(g)ΔH=−139kJ Determine the total energy change for the production of one mole of aqueous nitric acid by this process. |
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Answer» The following SEQUENCE of reactions occurs in the commercial production of aqueous NITRIC acid: 4NH3(G)+5O2(g)⟶4NO(g)+6H2O(l)ΔH=−907kJ 2NO(g)+O2(g)⟶2NO2(g)ΔH=−113kJ 3NO2+H2O(l)⟶2HNO3(aq)+NO(g)ΔH=−139kJ DETERMINE the total energy change for the production of one mole of aqueous nitric acid by this PROCESS |
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| 9. |
Phenyl mercuric acetate (PMA) results in |
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Answer» mercuric acetate (PMA) RESULTS in reduced transpiration. PMA is an antitranspirant. These are some chemicals whose limited APPLICATION on the leaf surface reduces or checks transpiration. A good antitranspirant INCREASES leaf RESISTANCE but does not AFFECT the mesophyll resistance. |
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| 10. |
B. 2C. 328. The total number of orbitals in a shell wither isheticB.C.D.D. 027. Rutherford's experiment led to thediscovery ofA. Nucleus34ElectronProtona-particle38principal quantum number 'n' is |
| Answer» SORRY i didn't GET the QUESTION | |
| 11. |
The molecularity of reaction is ; Always twoSame as its orderDifferent than order May be same or different as compared to order |
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Answer» a.select this ANSWER as a BRAINLIEST and THANKS too |
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| 12. |
Write down the number of protons and neutrons present in nucleus of isotopes of oxygen |
| Answer» TION:sccxravgqvr dgdcrcrcevegevevgegscwcsgdvtcdu | |
| 13. |
Write the equation for the formation of ionic compound. For each of the following pairs of atoms, use electron dot and electron cross structures toAl and CI(a) Mg and 0 (b) |
| Answer» TION:Ionic BONDS are caused by electrons transferring from one atom to another. Remember, in the final formula for the ionic compound, we do not write the CHARGES on the ions. These three ions attract each other to GIVE an overall neutral-charged ionic compound, which we write as NA 2O. | |
| 14. |
HCV of Gaseous Fuel is 3000 Kcal/m3. Calculate LCV if volume of gas burnt is 0.1m3 and mass of condensed steam is 0.015 kg and Latent of steam is 580 Kcal/Kg- |
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Answer» benrjrjdjdnfjfhjfncncncnxncnfnbfhdnfjfnjdndjfnfjfjdjxjcncjndjdn bcfjjfjfnfnhfjfjfjjfhdjdjdifufhfjfndnjkdkdjx bdbhffhnfnfhfjfjfjfjfjjfjfnfnvnjririirurifj hfjfjfjnfndmdkdjdjfjhchchfjf |
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| 15. |
Balance the followibv reactuon by ion electron method mno4(-1)+fe2+=fe3+ +mn2+ (acidic medium |
| Answer» GJ Bailey and black and black and blue and green and black and black and WHITE striped bikini with big CAR in use for the correct answer re the LATEST FLASH of light and black pepper and black46 and | |
| 16. |
For a chemical reaction can never be in fractional number OrderHalf lifeMolecularity Rate constant |
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Answer» Molecularity of the reaction is DEFINED as the number of atoms, ions or MOLECULES that MUST colloid with one another simultaneously so as to result into a chemical reaction. Thus it can never be fractional. Half life is the time taken by a REACTANT to reduce to its original CONCENTRATION |
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| 17. |
Conversion of propylene into epichlorohydrin reactions?? |
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Answer» The classical process starts from propene and through a FIRST step, CONSISTING in a high TEMPERATURE chlorination, allyl chloride is obtained; SUBSEQUENTLY, allyl chloride with HYPOCHLOROUS acid gives place to glycerol dichlorohydrins isomers and finally the reaction of the glycerol dichlorohydrins with sodi |
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| 18. |
The unit of rate constant isL.mol-1.S-1S-1L2 mol -2 S-1L-1 mol. dS-1 |
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Answer» warm rising air CURRENTS are called _________ / FILL in the blanks PLEASE give me ANSWER |
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| 19. |
Plz plz plz help me with this one thank u so much |
| Answer» 1 (✓)Q2 - c. 2,8,7 (✓)Q3 - b. B and C (✓)Q4 - a. P and R (✓) | |
| 20. |
What are called thermolysis reactions? |
| Answer» DEFINITION. THERMOLYSIS is CHEMICAL decomposition by heating. If a reaction is endothermic, heat is required for the reaction to proceed. ... The term pyrolysis is often used in place of thermolysis when ORGANIC compounds are decomposed at high temperature | |
| 21. |
Organic chemistry - High SchoolQuestion: How to convert benzene to biphenyl? |
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Answer» enzene can be CONVERTED to chlorobenzene by using Cl2+FeCl3 or ALCL3 and then perform the Fitting reaction of chlorobenzene which GIVES biphenyl as a product. |
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| 22. |
Why isnt coal entirely removed during the process of underground mining?? |
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Answer» t coal entirely removed during the process of underground mining? The environmental challenges from coal mining include coal MINE ACCIDENTS, land subsidence, damage to the water ENVIRONMENT, mining waste disposal and air pollution. These are EITHER environmental pollution or landscape change. A conceptual framework for solving mine environmental issues is proposed. |
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| 23. |
Pecific rate constant is the rate of reaction when initial concentration is equal to 0231 |
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Answer» cific rate constant (K) is the proportionality constant relating the rate of the REACTION to the CONCENTRATIONS of reactants. The rate law and the specific rate constant for any chemical reaction must be determined experimentally. The VALUE of the rate constant is temperature dependent. |
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| 24. |
प्र 2. अंडप्रजक और जरायुज जन्तुओं के बीच अंतर स्पष्ट कीजिए |
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Answer» हमने जाना कि कुछ जंतु विकसित शिशु को जन्म देते हैं, जबकि कुछ जंतु अंडे देते हैं जो बाद में शिशु में विकसित होते हैं। वह जंतु जो सीधे ही शिशु को जन्म देते हैं जरायुज जंतु कहलाते हैं। वे जंतु जो अंडे देते हैं अंडप्रजक जंतु कहलाते हैं। EXPLANATION: |
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| 25. |
1.1 g of phosphorus gave 2.29 g of its oxide on burning. Find out its simple formula |
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Answer» 0.0000001Explanation:0.0000001 gram. It is RARE to find collections of INDIVIDUAL ATOMS. Only a few elements, such as the GASES helium, neon, and argon,. |
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| 26. |
9. For the reaction, A + 2B --> 2C,5 moles of A and 8 moles of B are reacted, then(1) Whole A is consumed(2) Whole B is consumed(3) 8 moles of C are formed(4) 8 equivalents of C are formed |
| Answer» 3) 8 MOLES of C are formedmark me as brainliest..hope it helps U | |
| 27. |
What is boyels law ? |
| Answer» STATEMENT in PHYSICS: the VOLUME of a GAS at constant temperature varies inversely with the pressure EXERTED on it. | |
| 28. |
अस्पताल में शांति क्यों बनाए रखनी चाहिए 4 कारण लिखो |
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| 29. |
If temperature changes from 27°C to 42°C then number of moleculle havingenergy greater than threshold energybecomes five times then fine activation energy of reaction (in kj)[given in 5= 1.60 & R = 8:314 kJ/mol] |
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Answer» I don't but PLEASE don't be mad at me and my MOM is going to be a GOOD day at WORK and I don't tip in the morning I was going to be a good day at work and I don't tip of my life and I don't tip in the morning I was going to be a good day at work and I don't tip in the morning I was going to be a good day at work and I don't tip of your friends are for you to be with u I u too baby girl I was just thinking about it |
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| 31. |
A salt which shows adharo break in its solubility at 36°and become anhydrous |
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| 32. |
A salt which shows sharp break in its solubility at 36°and become anhydrous |
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| 33. |
What is the meaning of aptitude? i dont have any friend will any one be my friend please? |
| Answer» UDES are natural talents, special ABILITIES for doing, or learning to do, certain kinds of things easily and quickly. They have LITTLE to do with knowledge or culture, or EDUCATION, or even interests. They have to do with heredity. Musical talent and ARTISTIC talent are examples of such aptitudes. | |
| 34. |
4. The vapour density of carbon idoxide is 22 (H= 1). Its rate of diffusion under certain condition was found toWhat would be the rate of diffusion of oxygen under the same condition ? |
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Answer» dknvvccfssszxfhggxzasrhhhvcbjj |
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| 35. |
What will be the slope of v(infinity)-vt vs t graph 1. log a 2 k/2.30303.-k/2.3034 0 |
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Answer» are soverienty and MONARCH bad? also PLE EXPLAIN what these terms mean in a very simple manner please brainly community I NEED help:(are soverienty and monarch bad? also ple explain what these terms mean in a very simple manner please brainly community I need help:(are soverienty and monarch bad? also ple explain what these terms mean in a very simple manner please brainly community I need help:(are soverienty and monarch bad? also ple explain what these terms mean in a very simple manner please brainly community I need help:(are soverienty and monarch bad? also ple explain what these terms mean in a very simple manner please brainly community I need help:(are soverienty and monarch bad? also ple explain what these terms mean in a very simple manner please brainly community I need help:(are soverienty and monarch bad? also ple explain what these terms mean in a very simple manner please brainly community I need help:(are soverienty and monarch bad? also ple explain what these terms mean in a very simple manner please brainly community I need help:( |
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| 36. |
Al crystalles in cubic unit cell and edge length 405 pico and density = 2.7 gm/ cc predict the crystal |
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Answer» Theoretical density of crystal, ρ= N o a 3 NM g/cm 3 Given, ρ=2.70 g/cm 3 , a=405×10 −10 cm, M=26⇒n= MρN o ×a 3 = 262.70×6.022×10 23 ×(405) 3 ×10 −30 ⇒n=4So, it is a face centered cubic cell.Hence, Option "B" is the correct answer. I just tried .. |
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| 38. |
Iv)Write ascending order of following compounds with increasing lattice energyNaF, LF, RF |
| Answer» TION:Lattice ENERGY is inversely proportional to the radius of the ions. The size of magnesium ion is less than calcium ion. Hence, the lattice energy of magnesium oxide is the HIGHEST and that of LITHIUM fluoride is the lowest. The correct order of the lattice energy is MgO>CaF2>LiF.hope you understand. | |
| 39. |
Calculate the relative molecular mass of a compound, if 7.46 dm3 of the compound in the gaseous state (t=0 °C, p= 101.3 kPa) has the mass of 24.73 g. a) 74.25b) 6.18c) 7.46d) 98.9no answer is correct ? |
| Answer» MAY be 74.26 but there is only 74.25 | |
| 40. |
Make a list of things which are made by hydracarbon. at least 20 please |
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Answer» butane.diesel fuel.fuel oil.gasoline.kerosene.liquefied natural gas.liquefied petroleum gas.propane.Explanation:The most important use of hydrocarbons is for fuel. Gasoline, natural gas, fuel oil, diesel fuel, jet fuel, COAL, kerosene, and propane are just some of the commonly USED hydrocarbon fuels. Hydrocarbons are ALSO used to make things, including plastics and SYNTHETIC fabrics such as polyester |
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| 42. |
Which is not the property of diamond ? |
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Answer» nsoluble in all SOLVENT. |
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| 43. |
What is chemistry??define it!! |
| Answer» TION:the branch of science concerned with the substances of which MATTER is composed, the INVESTIGATION of their properties and reactions, and the USE of such reactions to FORM new substances. | |
| 44. |
Make a list of things which are made by hydracarbon. |
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Answer» butane.diesel fuel.fuel OIL. gasoline.kerosene.liquefied NATURAL gas.liquefied PETROLEUM gas.propane. |
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| 46. |
800cm3 of a gas at 400 torr pressure and 60c was heated until the volume of a gas was 200cm3 at the same pressure what is the final temperature of the gas |
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Answer» tion:According to Boyle's law P 1 V 1 =P 2 V 2 ⇒P 1 =650 mm,V 1 =800 cm 3 ,V 2 =Volume REDUCED by 40%. Remaining volume is 60% of its ORIGINAL volume= 100800×60 =480cm 3 . ⇒P 2 = 480650×800 =1083 mm HOPE IT HELPSMARK AS BRAINLIESTPLEASE FOLLOW |
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| 47. |
Calculate relative molecular mass of compound, if 1 dm3 of compound in gaseous state (t = 0 °C, p = 101.3 kPa) weights 3.74 g.16.7166.183.841.9no answer is correct |
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| 48. |
What is fiting reaction |
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Answer» The Wurtz–Fittig reaction is the chemical reaction of aryl halides with alkyl halides and sodium metal in the presence of dry ether to give substituted aromatic compounds. ... The reaction works BEST for forming ASYMMETRICAL products if the HALIDE reactants are somehow separate in their relative chemical REACTIVITIES. |
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| 49. |
How to come out from anxiety |
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Answer» Try these when you're FEELING anxious or stressed:TAKE a time-out. ...Eat well-balanced meals. ...Limit alcohol and caffeine, which can AGGRAVATE anxiety and trigger panic attacks.Get enough SLEEP. ...Exercise daily to help you feel good and maintain your health. ...Take deep breaths. ...Count to 10 slowly. ...Do your best.Explanation:HOPE IT HELPS........ |
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| 50. |
(3) 39. Three lines at three different values of constant pressure are given, which of the following relation is correct? P, P2 P3 T V/T (1) P, = P2 = P3 (3) P₂ > P₂ > P, (2) P, > P2 > P3 (4) Can't predicted |
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Answer» (2) P, > P2 > P3hope it will be EASY to UNDERSTAND |
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