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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. |
What do you mean by Mass by volume percentage of a solution ? |
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Answer» Answer: Mass by VOLUME percentage can be defined as the mass of solute dissolved in 100 mL of the solution. For INSTANCE, mass by volume percent of a solution with 1 G of solute dissolved in 100 mL of solution will be 1% or 1% (mass/volume).mark as brainliest pleasestay safe and follow me |
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| 2. |
The enthalpy change for the reaction, C2H6(g) → 2C(g) + 6H(g) is XKJ. The bond energy of C - H bond is:ans in detail |
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Answer» Answer: X/2 hope you like it |
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| 3. |
Which is the strongest acid ever and why? |
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Answer» Answer: carborane acid carborane acidThe WORLD's strongest acid, at least a million times more potent than concentrated sulphuric acid, has been made in a lab in California. Perhaps CONFUSINGLY, it is also ONE of the least corrosive. The compound, called a carborane acid, is the first 'superacid' that can be stored in a bottle, say its creators. Acidity. Fluoroantimonic acid is the strongest superacid based on the measured VALUE of its Hammett acidity function (H0), which has been DETERMINED for different ratios of HF:SbF5. |
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| 4. |
Why some rays goes undefected in rutherford experiment? |
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Answer» Originally Rutherford thought that the particles WOULD fly straight through the foil. However, he FOUND that the particles path would be shifted or deflected when passing through the foil. This is due to the FACT that like charges repel each other. |
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| 5. |
Give an example for :a. Bivalent cation.b. Trivalent anion - |
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| 6. |
How many moles of carbon atoms andchlorine atoms does it take to make one mol of carbon tetrachloride (CCl4) molecules? |
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| 7. |
19. (i) What is the co-ordination number of Na+ inNaCl crystal ? |
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Answer» Answer: Six The coordination number of sodium is 6. LIKEWISE, six sodium ions immediately surround each chloride ions, MAKING the coordination number of chloride also equal to 6. Because the FORMULA UNIT of sodium chloride displays a 1:1 ratio between the ions, the coordination numbers must be the same. |
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| 8. |
5. Find the mass of 12.044 x 1023 particles of SOz. |
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Answer»
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| 9. |
C2 H6 lone pair please tell |
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Answer» Answer: |
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| 11. |
Why there is no loss of exchange energy at d6 configuration..? |
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Answer» Answer: The LOSS of exchange energy increases the stability. As the stability increases, the ionisation BECOMES more difficult. There is no loss of exchange energy at d6 CONFIGURATION. Mn+ has 3d54s1 configuration and configuration of Cr+ is d5, therefore, ionisation ENTHALPY of Mn+ is lower than Cr+. Explanation: I hope it will be help you |
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| 12. |
दूध में खटाई ड आलने पर वह संदीप हो |
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Answer» ................???????????? |
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| 13. |
The enthalpy change for the reaction, C2H6(g) → 2C(g) + 6H(g) is XKJ. The bond energy of C - Hbond is:ans in detail |
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Answer» Answer: Thanks for free POINT Explanation: Make me brinelist If possible Thanks |
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| 14. |
why does distilled water not conduct electricity whereas rainwater does? why a dry litmus paper colour doesn't change on passing dry hcl gas |
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Answer» Answer: 1. Distilled WATER is pure form of water which do not contain any solute in it. Therefore it cannot conduct electricity because it does not contain ions while rain water CONTAINS dissolved SALTS and acids which dissociates in ions and conducts electricity. 2. Dry HCl gas is not acidic because water is REQUIRED for the dissociation of HCl into H+ and Cl-. Therefore, dry HCl gas is not acidic and will not change the colour of dry blue litmus paper. |
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| 15. |
Tell fast plz...... |
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Answer» B hs HIGHEST ionisation ENTHALPY becoz of the small size it's electron are more ATTRACTED by neuleus and its can't lose electron easily |
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| 16. |
Calculate the energy of a photon whose frenqency is 3.6 hz |
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Answer» E= 6.6*10^-34 * 3.6. =23.76 ^10-34 J |
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| 17. |
જો કોઈ કણની ગતિ ઊર્જા ૩×૧૦-²૫ હોય , દળ ૯.૧×૧૦-³¹ kg હોય, તો તેની તરંગ લંબાઈ શોધો |
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Answer» jhguiresxcawwh. nkoufcvnkopkjnnbty7u |
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| 18. |
J. Chadwick discovered a subatomic particle which has no charge but has mass nearly equal to that of a proton. Name the particle and give it’s location in an atom. J. Chadwick discovered a subatomic particle which has no charge but has mass nearly equal to that of a proton. Name the particle and give it’s location in an atom. |
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Answer» In 1932, J. Chadwick discovered ANOTHER SUBATOMIC particle which had no charge and a mass nearly EQUAL to that of a proton. It was eventually named as NEUTRON. Neutrons are present in the nucleus of all atoms, except hydrogen. |
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| 19. |
In an experiment, on burning 3.5 Kg of fuel, 70,000 kJ of energy wasproduced. Determine its calorific value. |
Answer» Given:-→Mass or AMOUNT of fuel BURNT =3.5kg →Amount of energy produced = 70000kJ To find:-→Calorific value of the fuel Solution:-We know that:- Calorific value of a fuel :- Amount of energy produced / Amount of fuel burnt = 70000/3.5 = 20000 kJ/kg Thus, calorific value of the fuel is 20000 kJ/kg. Some Extra Information:-Calorific value : It REFERS to the HEAT produced by unit volume of a substance by complete combustion. The efficiency of a fuel or food mainly depends on it's calorific value. If calorific value of a fuel is high, it's efficiency will be also high. S.I. unit : The S.I. unit of calorific value is kJ/kg (Kilojoules-per Kilogram) The calorific values (approximate) of some common fuels are :- • LPG - 55000 kJ/kg • Petrol - 45000 kJ/kg • Diesel - 45000 kJ/kg • Coal - 33000 kJ/kg • Biogas - 40000 kJ/kg • Wood - 22000 kJ/kg |
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| 20. |
A 100 mL solution contains 0.0010 mol/L of calcium chloride and 0.0010 mol/L ofstrontium chloride. 50 mL of 0.1000 mol/L sodium sulfate is added. Determinethe percentage by mass of calcium sulfate in the product. The solubility productsvalue of calcium sulfate is 9.1 x 10-6 and for strontium sulfate it is 3.2 x 107. |
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Answer» Explanation: gyjvxdbhhhjjjjvcghjikj |
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| 22. |
Express 10000 in scientific notation |
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Answer» Answer: Words DECIMAL REPRESENTATION Scientific Notation one hundred 100 1 X 102 one thousand 1,000 1 x 103 ten thousand 10,000 1 x 104 one hundred thousand 100,000 1 x 105 |
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| 23. |
Find the odd one out : Lemon juice, Black Coffee, HCl, Blood |
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| 24. |
A solution contain 40g of sugar and 320g of water? Calculate the concentration of solution? |
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Answer» Answer: 360 G of solution Explanation: I am not sure |
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| 25. |
Calculate the number of moles of oxygen atoms and number of water molecules present in 14.3gram of washing soda. |
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Answer» paaaaaaaad kekdjjdjdhdheuudududhhevrvrjdjxhdgbdnrkrjdhbrbtmdkxhbd dkdjxvd fndhcvfndkdvdndkdjdh |
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| 26. |
Chemistry reduced syllabus for 11th... complete list with topics... please guys help me... ♥♡♥ |
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| 27. |
How will you obtain hydrogen from water? |
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Answer» There are a number of ways to produce hydrogen: 1.Natural Gas Reforming/Gasification: Synthesis gas, a mixture of hydrogen, carbon monoxide, and a SMALL AMOUNT of carbon dioxide, is created by REACTING natural gas with high-temperature steam. ... 2.Electrolysis: An ELECTRIC current splits water into hydrogen and oxygen. |
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| 28. |
Preparation of ketones |
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| 29. |
I. E for cation is more then neutral atom why? |
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Answer» Answer: hey Explanation: because CATION is already positively CHARGED and small in size and it would be different to remove an ELECTRON from it as COMPARED to neutral atom you can follow me:) |
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| 30. |
MATCH THE FOLLOWINGoxide nature a)co i)basic b)Bao ii)neutral c)Al2o3 Acidic d)Cl2o7 iv)Amphoteric |
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Answer» cjufdddtyuhvdefyijnvcdry |
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| 31. |
When phenolphthalein is added to NaOH solution, the solution turns |
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Answer» Answer: Phenolphthalein is BASIC indicator which REMAIN colorless in acidic and neutral solution and turns pink or magenta in basic solution. (i) When few DROPS of phenolphthalein is added to sodium HYDROXIDE, the solution turns deep pink as NaOH is a strong base. |
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| 32. |
मंदिरा चा आतील भाग शब्द समूह साठी एक शब्द |
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Answer» मंदिराच्या आतील भाग शब्द समूह साठी एक शब्द Explanation: |
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| 34. |
Calculate the energy of a photon whosw frequency is 3.6 Hz |
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Answer» Answer: 0.000000000014888 mev Explanation: |
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| 35. |
C)010)80Pin, eoB8 2135 |
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Answer» Sorry, but I'm UNABLE to UNDERSTAND your question. Kindly POST it again. |
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| 36. |
ऐसी रसायन ओषधियाँ जो आमाशय में अम्ल के स्राव को कम करती है ,प्रतिअम्ल ओषधियाँ कहलाती है। निम्न्न में से कौनसी प्रतिअम्ल ओषधि नहीं है *RANITIDINEOMEPRAZOLEMAGNESIUM HYDROXIDEPARACETAMOL |
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Answer» Answer: RANITIDINE.. plz MARK me as brainlist if you make me as brainlist then i GOT a NEW RANK.. |
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| 37. |
A student drops pieces of potassium and silver in beakers containing water. The image shows the reaction. What are the products formed in each beaker? |
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Answer»
Reaction involved- CaCO 3
+2HCl→CaCl 2
+CO 2
+H 2
O The EVOLVED gas is carbon dioxide which when passes through lime water turns it milky. Ca(OH) 2
+CO 2
→H 2
O+CaCO 3
⇐ due to FORMATION of this compounds when EXCESS CO 2
is passed CaCO 3
+H 2
O+CO 2
→Ca(HCO 3
) 2
BICARBONATE is formed which again clears the solution. |
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| 38. |
Sets of four quantum numbers,an electron will have the highest enrrgy |
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Answer» to 6 Explanation: HIE pieui4hioehj3i3i393oj3u3h ejikebh3j3k4k4 |
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| 39. |
ऐसी रसायन ओषधियाँ जो आमाशय में अम्ल के स्राव को कम करती है ,प्रतिअम्ल ओषधियाँ कहलाती है। निम्न्न में से कौनसी प्रतिअम्ल ओषधि नहीं है *2 pointsRANITIDINEOMEPRAZOLEMAGNESIUM HYDROXIDEPARACETAMOL |
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| 40. |
Formula of "penta aquachlorido cobalt 111 chloride? |
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| 41. |
Liquids generally have lower density as compared to solids. But you must have observed that ice floats on water. Find out why. |
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Answer» Liquids GENERALLY have LOWER density as compared to solids but ice FLOATS on water. When water freezes to form ice, some empty spaces are created. As a result, volume increases for the same mass of water. hope it will HELP you |
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| 42. |
Yaar aaj bhi.....plzz thode se thnx aur dedo....plzz plzz |
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Answer» Answer: OK I will give you thanksgood morninghave a good day |
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| 43. |
Explain the general characteristics of metalplzz answer briefly and immediatly |
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Answer» Answer: are LUSTROUS have high BOILING and melting point are ductile have tensile strength are sonorous are malleabile <U>hope it will help u dear..... |
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| 44. |
Formula of "penta aquachlorido cobalt 111 chloride"? |
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Answer» Explanation: Amazon. Pay on Delivery. Easy & Fast Delivery. Huge Selection. Low Prices. No Cost EMI Available. Great OFFERS. Top BRANDS. Best Deals. Lab & Scientific Products matk as brainlist ANSWER |
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| 45. |
2.82g of glucose is dissolved in 30g of water .calculate the ;a. molalityb. mole fraction of glucose and waterc.C6H12O2- molar mass |
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Answer» hope MAY it help you B. mole fraction of glucose and water |
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| 46. |
Carbon black have any smell? |
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Answer» Answer: Buffaloheads are smelling carbon DISULFIDE, a WASTE gas that smells like rotting radishes Explanation: HOPE u get it |
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| 47. |
suppose 105 g of water at 15°C is heated until it boils to dryness. heat if fusion of water is 335 J/g , specific heat of water is 4.184 J/g , Heat of vapor in water is 2262 J/g, what is the total amount of heat used? |
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Answer» yggvvvb V v bn Explanation: hgffvvijio |
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| 49. |
Types of sectors in economy ✌✌✌✌ |
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Answer» Answer: there are THREE TYPES of SECTORS in an economy
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| 50. |
Consider the following reactions,a) H.(g) +1,(g) = 2 HI(g)b) CaCO,(s) = Cao (s) + CO2(g)c) S(s) + 3F, (g) = SF, (g)In each of the above reaction find out whether you have to increase (or)decrease the volume to increase the yield of the product. |
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Answer» In the FIRST two reactions, we'll have to increase the volume and in the last ONE we'll have to decrease the volume. Explanation: shortcut: if we increase volume, the REACTION will go in the direction where the volume is already greater and if we decrease volume then the reaction will go in that direction where the volume is already less. Hope it HELPS. |
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