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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. |
Process by which we can remove soluble impurities from water |
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Answer» this is U R ANSWERMARK it as BRAINLIEST answerBye |
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| 2. |
How can rubber prove to be a good conductor of heat |
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Answer» this is U R ANSWERMARK it as BRAINLIEST answerBye |
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| 3. |
Properties of elements are periodic function of their atomic no not atomic weight explain |
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| 4. |
State the dependence of work function on the kinetic energy of electron |
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| 5. |
On what factor the choice of an indicator in acid-base titration depends? |
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Answer» this is U R ANSWERMARK it as BRAINLIEST answerBye |
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| 6. |
How would you distingiush between nitric acid and hydrochloric acid by addition of? |
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Answer» this is U R ANSWERMARK it as BRAINLIEST answerBye |
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| 8. |
What is the process to remove temporary hardness of water |
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| 9. |
What are the properties of hydrite |
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| 10. |
State the major difference between w a protons and an electrons |
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Answer» as BRAINLIEST answerBye |
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| 11. |
Difference between front end and tail end hydrogenation |
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| 12. |
Methods of determining the sequence of amino acids in a protein |
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Answer» this is U R ANSWERMARK it as BRAINLIEST answerBye.... |
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| 13. |
Does covalent bond has high melting point or low boiling |
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Answer» this HELPS youFollow me |
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| 16. |
When excess of electrolyte is added to a colloid it? |
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Answer» By addition of ELECTROLYTES: The particles of the dispersed phase i.e., COLLOIDS bear some CHARGE. When an ELECTROLYTE is added to sol, the colloidal particles take up ions carrying OPPOSITE charge from the electrolyte. |
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| 17. |
Who tell you about diffusions?? |
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Answer» on is the net MOVEMENT of molecules from a region of higher CONCENTRATION to a region of LOWER concentration. Diffusion is driven by a GRADIENT in chemical potential of the diffusing SPECIES. |
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| 19. |
Aerobic reaction which converted nitrates to nitric oxide |
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Answer» reatment OFTEN relies on the activity of anaerobically denitrifying bacteria in ORDER to remove nitrate from water. However, due to the ABSENCE of oxygen, nitrate cannot be fully reduced to DINITROGEN, thus nitrate remains in the water or it is converted to nitrous oxide. |
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| 20. |
What is ozonolysis? Give its significance. |
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Answer» sis is the PROCESS by which ozone (O3) reacts with alkenes (OLEFINS) to break the double BOND and form TWO carbonyl groups. |
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| 21. |
How does the ph of a solution affect the rate of enzymatic browning of apples? |
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| 23. |
Element x y z forms advenir track if the atomic mass of x is 7 and that of z is 23 then what will be the atomic mass of y |
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Answer» it will be 15............ |
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| 24. |
Differentiate between hydrogenation and oxidation |
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Answer» on has three DIFFERENT definitions:-DECREASE of reduction NUMBER, LOSS of hydrogen and gaining of oxygen........however hydrogenation essentially required a catalyst where as OXIDATION does not required a catalyst, unless it is known as hydrogenation this is the main difference between hydrogenation and oxidationHiI think it may help youplease please please please please please please please please please please please please please please please please please please please please please please................mark as brainlist answer because I have one step back from my next rank |
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| 25. |
Silane, SiH4 burns in air. The products are solid SiO2 and gaseous water: ΔG(kJ/mol): -805 -228.6 52.3 0 Substance: Predict the spontaneity of the reaction. |
| Answer» DICT WHETHER the REACTION is SPONTANEOUS or not, we should first calculateThe reaction," | |
| 26. |
Copper +silver nitrate-> |
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Answer» 2AgNO3(AQ)-------------> Cu(NO3)2(aq) + 2Ag(s)copper metal DISSOLVED in a silver NITRATE solution the balanced equation is thisplease MARK it as brilliant |
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| 27. |
Physical characteristics of salt ? |
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Answer» l properties of SALT are:Salt is a white cubic crystals.When the salt is pure it clear. It also appear in white,grey or brownish color depending upon the purity.It is odorless but has strong salty taste.Solubility in water is DIFFERENT at different temperatures.Hygroscopic(ability of a substance to attract and HOLD water molecules from the surroundings).MELTING point of salt is 800.8 DEGREE Celsius.Boiling point of salt is 1465 degree Celsius. |
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| 28. |
What can be done to reduce the release of carbon dioxide? |
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Answer» imate-conscious political decisions. Purchase “green electricity“. Make your home and household energy efficient. Buy energy and water efficient APPLIANCES. Walk, cycle or take public TRANSPORT. Recycle, re-use and avoid useless PURCHASES. TELECOMMUTE and teleconference. Buy local produce. |
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| 29. |
Write the equation of the reaction involved between ethanoic acid and sodium carbonate what happens when the final product is passed through freshly prepared lime water |
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Answer» + Na2CO3 -----> CH3COONA + CO2 + H2OSodium ACETATE , water and carbon DIOXIDE are formed.When the product is PASSED through LIME water , then the lime water turns milky. |
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| 30. |
Hydrogen is highly soluble in water at 0°c is that write or wrong I want the answer now itself |
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Answer» the answerthe GARPH will SHOW the reading of H2 soluble in WATER |
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| 31. |
Silver chloride is placed in the sun it turns grey because of the formation of |
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Answer» chloride turns grey when kept in SUNLIGHT. Explanation: Silver chloride which is white COLOUR turns to grey colour silver due to decomposition REACTION which occur in presence of sunlight. Such reactions are called as PHOTO CHEMICAL reactions. |
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| 32. |
Which of the following is exothermic reaction (a) decomposition of Valium carbonate by heat (b) decomposition of silver chloride by sunlight (c) decomposition of vegetable matter into compost (d) decomposition of lead nitrate by heat |
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Answer» 3 and partially poisoned by lead acetate, sulphur than B DUE to ... (a) NH 3 (b) PH 3 (b) their carbonates decompose on heating to give C0 2 ... AH and AS for a reaction are +30.558 kJ mol"1 (b) silver ELECTRODE ACTS as ...... (c) both (i) and (ii) (d) none of these. silver nitrate SOLUTION? ...... (CH 3 ) bright sunlight (U.V.), |
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| 33. |
Explain occurrence of methane and it's preparatiopreparation. |
| Answer» ES it MEANS I can't UNDERSTAND | |
| 34. |
Which gas is absorbed strongly by Charcoal? (a) CO (b)NH3 (c) NCl3 (d) H2 What is the right answer? |
| Answer» ABSORBED STRONGLY by CHARCOAL. | |
| 35. |
Pls ans Iso propyl is formed when we remove one hydrogen from middle carbon but if we remove two hydrogen will it be called propyl instead of iso propyl ? |
| Answer» YL structure is this and if we REMOVE 1 more HYDROGEN from this it will become c3h6Which is cyclopropane propene aur propylene so it will be CALLED propene aur cyclopropane aur propylene not propyl | |
| 36. |
C2H4 + HI(cold)= ??? |
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Answer» electrophilic addition reaction between C2H4 and HI, does the electron GO from the hydrogen to the carbon EVEN THOUGH carbon is more electronegative. |
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| 38. |
A gas cylinder contains 370 g oxygen gas at 30 atm pressure and 25°C. What mass of oxygen would escape if first the cylinder were heated to 75°C and then the valve were held open until gas pressure was 1 atm, the temperature being maintained at 75°C? |
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Answer» cuz since you are using a gas cylinder, which is a rigid container, the volume won't change n1 = 370 g x 1mole / 32.0 g = 11.56 g T1 = 25 C = 298 K P1 = 30.0 atm n2 = ? T2 = 75 C = 348 K P2 = 1.00 atm R = 0.0821 L x atm / k x mole First find the volume of the container using the IDEAL Gas Law P1V1 = n1RT1 V1 = n1RT1 / P1 V1 = 11.56 mole x (0.0821 L x atm / k x mole) x 298k /30.0 atm V1 = 9.43L Now find the number of mole in enviroment 2: P2V2 = n2RT2 n2 = P2V2 / RT2 n2 = 1.00 atm x 9.43L / ( ( 0.0821 L x atm / k x mole) x 348k) n2 = 0.330 mole n escaped = n1 - n2 n escaped = 11.56 mole - 0.330 mole n escaped = 11.23 mole g escaped = 11.23 mole x 32.0 g / 1 mole g escaped = 359g . |
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| 39. |
Ni(gly)2 shows two isomers.explain it |
| Answer» 2] SHOWS two stereoisomers. and both of them are GEOMETRICAL isomers. | |
| 40. |
Calculate the weight of CaO obtained by heating 200g of 95% pure limestone, ? |
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Answer» ar MASS of =100Molecular mass of CAO=56100g caco3 make 56g cao200000g will make=56*200000/100=112kgfor 95% =106.40kg of CaO |
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| 41. |
Give the IUPAC name of the compound: = CH – |
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| 42. |
Give two applications of buffer solution. |
| Answer» SOLUTIONS are important in analytical chemistry and generally lab work.Catalytic activity of an ENZYME is maximum at a PARTICULAR pH. So,enzyme catalysed reaction and other BIOCHEMICAL reaction are occurred in presence of buffer solution of particular pH. | |
| 43. |
What is rock salt ? why is it brown in color. |
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Answer» other GEOLOGICAL influences mean the rock salt's COLOUR can SOMETIMES GO from clear, to pink, to dark brown. Rock salt is brown in colour due to the impurities present in it. when the salt is in CRYSTAL form ,it is known as rock salt.Rock salt is brown in colour due to the impurities present in it. |
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| 44. |
Did ammonium sulphide goes under sublimation process |
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Answer» ═══════════════╕☬ YOUR ANSWER ☬╘═════════════════════╛⏩Substances that UNDERGOES SUBLIMATION. ➡ammonium chloride doesn't actually undergo sublimation upon heating.⭕ It decomposes and FORMS ammonia GAS and hydrogen chloride gas.╒══════════════════════╕☬ THANKS! @Brainlyconquerer ☬╘══════════════════════╛ |
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| 45. |
Consider the following cell reaction:- 2Fe(s)+O2(g)+4H+ ------> 2Fe2+(aq) + 2H2O(l) E°=1.67V. At Fe2+ = 10-3^M, pO2= 0.1atm and pH = 3, calculate the cell potential at 25°C. |
| Answer» LOG[H+]3 = - log[H+]-antilog 3 = [H+]Therefore, [H+] = 10-3 MOxidation half reaction:Fe(s) → FE2+ + 2e- ] X 24H+ + O2 + 4E- → 2H2ONumber of electrons involved, n = 4Cell potential is given as,Ecell = E°cell − 0.529n log[Fe2+]2[H+]4Ecell = 1.67 − 0.5294log [10−3]2[10−3]4Ecell = 1.67 − 0.13225 log 106Ecell = 1.67 − 0.13225×6Ecell = 1.67 − 0.7935 = 0.8765 V | |
| 46. |
Name the three common name of allotropes of carbon |
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Answer» Different FORM of an element which have different physical appearance and properties but their chemical properties are same are CALLED Allotropes. There are three Allotropes of carbon:- 1. Diamond 2. Graphite 3. Fullerene Explanation:1. Diamond - Diamond is a 3-dimensional network of strong carbon-carbon covalent bond. 2. Graphite - In Graphite each carbon atom is bonded with three other carbon atoms to form hexagonal rings. 3. Fullerene - It is as same structure as graphite. But also CONTAIN pentagonal or heptagonal rings. SPHERICAL fullerene are called Bucky balls and Cyndrical fullerene are called lucky tube or nano tubes. |
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| 47. |
If hydrogen is represented as jcjzyssd how antimony will be represented as |
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| 48. |
How micelles are formed in water solution.? |
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Answer» re molecules in which the two ends have different properties,one is hydrophilic,that is dissolve in water,while other end is hydrophobic,that is ,it dissolves in hydrocarbons.when soap is at the SURFACE of water ,the hydrophobic,tail,of soap will not be soluble in water and the soap will align along the surface of water with the IONIC end in water and the hydrocarbon tail proturing out of water .inside water,these molecules have a unique ORIENTATION that keeps the hydrocarbon portion of the water.this is achieved by forming clusters of molecules in which the hydrophobic tails are in the interior of the cluster and the ionic end are on the surface of the cluster.this formation is called a micelle.IF YOU WANT TO GET FULL ANSWER THEN MARK ME AS BRAINLIEST.BEST REGARDS FROM SHIVAM RAJPUT ʝąı ʂɧཞɛɛ ཞąɱ |
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| 49. |
Write the electronic configuration of elements whose atomic no. are 5 and 7 |
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Answer» no. 5 ELECTRONIC CONFIGURATION= 2,3 7electronic configuration= 2,5 |
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