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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. |
Examples of electrovlant hyadrides |
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Answer» Answer: Ionic hydrides on electrolysis liberate hydrogen GAS at the anode. Saline or ionic hydrides does not DISSOLVE in conventional solvents and they are mostly used as bases or reducing reagents in organic synthesis. Example of Ionic Hydrides: NAH, KH, CAH2, etc. These contain hydrogen as the negatively charged (H–) ion. Hydride, any of a class of chemical compounds in which hydrogen is combined with another element. THREE basic types of hydrides—saline (ionic), metallic, and covalent—may be distinguished on the basis of type of chemical bond involved. Explanation: |
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| 2. |
10% (W\V) H.SO, દ્રાવણની સપ્રમાણતા એ આશરે કેટલીથાય ?(1) 0.1(2) 0.2(3) 0.5(4) 2 |
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Answer» o. 1ghhgvvmmnhgfccvbiuddxxc |
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| 3. |
(iii) 0.1 mole of carbon atoms (numberfrom given moles) |
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Answer» Answer: The value of the mole is equal to the number of ATOMS in exactly 12 GRAMS of pure carbon-12. 12.00 g C-12 = 1 MOL C-12 atoms = 6.022 × 1023 atoms • The number of particles in 1 mole is called Avogadro's Number (6.0221421 x 1023). Explanation: ok THANK you ,and I hope this is helpful for you. |
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| 4. |
What is the full form of WWE ? |
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Answer» Answer: The full FORM of WWE is World Wrestling Entertainment. Explanation: Hope it HELPS. |
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| 5. |
The nearest hundredof 582 is what is the answer |
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Answer» Answer: 600 Explanation: 600 is answer because when be ROUND off the number 582 the ANS is 600 |
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| 6. |
Why does CaO dissolve in polar solvents like water? |
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Answer» Answer:CaO is ACTUALLY sparingly soluble, meaning it will only dissolve in very small amounts. This I believe is because the formation of calcium hydroxide NATURALLY RAISES the acidity of the water (by LIBERATING H+ ions). CaO is soluble in acid. The specifics of solubility are extremely complex but in GENERAL, there are a few solubility rules (Solubility rules) that you can follow to generally determine if a compound is soluble or not. In application to calcium oxide: Explanation: |
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| 7. |
Which rays can produce colour change in out skin a)ultraviolet day. B)x-Ray .c)infrared ray .d)Gamma rays |
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| 8. |
What is the minimum mass of Al(OH)3 that can be obtained by reaction of 13.4 gm of AlCl3 with 10 gm NaOH acc to following equation (at. mass of Al=27) AlCl3 + 3 NaOH -----> Al(OH)3 + 3NaCl |
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Answer» nswr search What WOULD you like to ask? 11th Chemistry Some Basic Concepts of Chemistry Stoichiometry and Stoichiometric Calculations What is the maximum mass of... CHEMISTRY avatar Asked on December 26, 2019 by Amruta Gosalia What is the maximum mass of Al(OH) 3
that can be prepared by reaction of 13.4 GRAMS of AlCl 3
with 10 grams of NaOH according to the following equation? AlCl 3
+ 3NaOH→Al(OH) 3
+ 3NaCl MEDIUM Share Study later ANSWER Moles of AlCl 3
= 133.5 13.4
=0.1 moles Moles of NaOH= 40 10
=0.25 moles AlCl 3
+3NaOH⟶Al(OH) 3
+3NaCl 0.1 0.25 0.0167 0.0833 Since, NaOH is limiting 0.0833 moles of Al(OH) 3
are formed. Mass =0.0833×78=6.5 gm Hope this will help you. |
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| 9. |
Redworms are used for = |
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Answer» Answer: Red worms are used for COMPOSTING KITCHEN scraps and MANURE management for cows, horses, PIGS, and rabbits. They are commonly used to turn YARD and landscape debris and biosolids into soil enriching vermicompost. Explanation: |
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| 10. |
Pls help Give an example where the fish see so Sean changes to chemisorption with rise in temperature explain the reason for the change |
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Answer» in Explanation: |
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| 11. |
) Bill needs to balance an equation that involves aluminum oxide (formula Al2O3). He needs a total of 12 oxygen atoms to balance his equation. What should he write? 12 Al2O3, 4 Al2O3, or Al6O12? make it simple and really appreciate it if u would give me an answer |
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Answer» i it your answer PLEASE Mark me in brain list |
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| 13. |
Which of the following mixtures cannot be separated by fractional distillation? (a)Acetone and methyl alcohol (b)Chloroform and Benzene(c) 5% water and 95% ethyl alcohol(d) Benzene and toluene |
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Answer» benzene and TOLUENE Explanation: Ethanol can be separated from a mixture of ethanol and WATER by fractional distillation |
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| 14. |
Consider two solutions:1. ) 0.5 M NaCl aqueous solution at 25°c ; NaCl is completely ionisedNacl is completely jonized.2.) 2.0 MCH5coot in benzene at 25°c ; the acid dimerizes to the full extent.which of the following statement (s) is/arecorrect? |
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Answer» Answer: 0.5 M NaCl aqueous solution at 25 o C; NaCl is completely ionized. 1 L of solution will contain 1L×0.5mol/L×2=1.0mol of particles as one MOLECULE of NaCl dissociate to give two ions (particles). II. 2.0 M C 6
5
COOH in benzene at 25 o C; C 6
H 5
COOH dimerizes to the full extent. 1 L of solution will contain 1L×2.0mol/L×0.5=1.0mol of particles as two molecules of C 6
H 5
COOH associate to give one DIMER (particles). |
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| 15. |
The formula of compound of X is XCl2.Then the formula of its sulphide will be |
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Answer» PLEASE MARK my answer as BRAINLIEST answer if it HELPS you Explanation: please mark my answer as brainliest answer if it helps you |
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| 16. |
What is an anode reaction in copper refining |
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Answer» Impure copper plates. Oxidation occurs at the anode. Copper is OXIDIZED at the anode. Cu(s) → Cu2+(aq) + 2e- ELECTRONS are produced at the anode Explanation: please mark as BRAINLIST |
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| 17. |
Why can't you squeeze a sealed plastic syringe that is completely full of water? |
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Answer» Explanation: you can't SQUEEZE a SEALED plastic syringe that is completely full of water. Water has LESS compressibility. When you squeeze it, it has no place to escape. You can compress it very SLIGHTLY. |
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| 18. |
Macromolecules are------- |
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Answer» A macromolecule is a very large MOLECULE, such as PROTEIN, COMMONLY composed of the polymerization of SMALLER subunits called monomers. Explanation: |
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| 19. |
Write IUPAC nomenclature of this ketone group.(answer fast.till yesterday morning 6am |
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Answer» Explanation: IUPAC NAME :- 2-(1',2',2',3',3'-pentamethyl butane)-2,6,6,8,8-penta(1',1'-dimethyl ethane)-3,3,12,13,13,14,14-heptamethyl-10(1',2',2'-trimethyl propane)-10(1',2',3',3'-tetramethyl butane)-12(1',1',2',2'-tetramethyl propane) pentdecanal ( Refer to the attachment. ) Additional information :- Functional GROUP :- Aldehyde group Priority :- Aldehyde group Longest C-chain :- 15 molecular formula :- C72H144O molecular mass :- 1024 g/mol Calculation of molecular mass :- → 12×72 + 1×144 + 16 → 864 + 144 + 16 → 1024 Priority ORDER between Aldehyde, Ketone and Carboxylic acid group :- Carboxylic acid group (-COOH) > Aldehyde group (-RCHO) > Ketone group (R-CO-R') |
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| 20. |
An element x when combines with hydrogen forms XH2 . find its valency |
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Answer» Answer: 2 .......... MARK as BRAINLIEST |
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| 21. |
Which of the following Quantum numbers is possible? *n= 3 l =3 m = -3 s = +1/2n=2 l=0 m=0 s = -1/2n=2 l=1 m=2 s = -1/2n=1 l=0 m=0 s=0 |
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Answer» n=3 l=3 m=-3 s=+1/2 is the answer........ |
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| 22. |
Same quantity of electricity is passed separately through a solution of a chloride of metal M and acidulated water when 14.8 litre H2 at NTP and 42 gram of M are obtained .if the specific heat of metal is 0.098 then determine the formula of mettalic chloride ? |
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Answer» |
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| 23. |
Mixture OF Rice and Stone. property used For sepration |
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Answer» Answer: HAND picking can be used for that seperation Explanation: since rice and stone have different SHAPE, size and COLOUR so it is easy for us to separate rice and stone by simple hand picking don't FORGET to mark my answer brainliest |
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| 24. |
Example of localized and delocalized electron |
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Answer» Answer: As an EXAMPLE, the two oxygens of an ESTER group possess localized and delocalized lone PAIRS. The red ELECTRONS on the oxygen can participate in resonance stabilization because of the possibility of moving up the pi bond electrons. Explanation: please mark as brainlist |
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| 25. |
Which of the following statements are true and false? I- Acids react with non-metallic oxides to give corresponding salts and water. II- The oxides of metals react with base/alkalis to form the corresponding salts and water. III- The reactive metals such as copper, silver, gold readily react with acids |
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Answer»
(2)False (3) true |
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| 26. |
Principle of iron filing + sulphur |
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Answer» Separating a mixture of powdered iron and powdered sulfur is a classic, first-week LAB. Clearly, iron is magnetic, while sulfur is not. Place a bar MAGNET in a small plastic BAG, and stir the magnet around in the mixture. The iron will adhere to magnet and the TWO will be separated..... |
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| 27. |
Does overeating cause acidity?why |
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Answer» Answer: |
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| 28. |
In a balanced equation H 2 SO 4 +xHI→H 2 S+yI 2 +zH 2 O The vales of x, y and z are: |
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Answer» Answer: X = 8, Y = 4, Z = 4 Explanation: H2SO4 + 8HI = H2S + 4I2 + 4H2O plz Don't FORGET to Mark this answer as brainliest |
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| 29. |
Which of the following elements is tendency from covalent compound |
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Answer» Carbon is the element that can FORM covalent bonds. |
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| 30. |
100mg/DL Glucose final vol is 100ml . prepare standard solution |
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Answer» MGL 876mk Explanation:.... |
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| 31. |
ʜᴇʟʟᴏ ғʀᴇɪɴᴅs...ᴛʀʏ ᴛᴏ ᴀɴsᴡᴇʀ ᴛʜɪsᴀᴛ ᴡʜᴀᴛ ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇ ᴛʜᴇ ᴋɪɴᴇᴛɪᴄ ᴇɴᴇʀɢʏ ᴏғ ᴀ ɢᴀs ᴍᴏʟᴇᴄᴜʟᴇ ɪs ᴏɴᴇ ʜᴀʟғ ᴏғ ɪᴛs ᴠᴀʟᴜᴇ ᴀᴛ 30 ᴅᴇɢʀᴇᴇs ᴄᴇʟsɪᴜs .. |
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Answer» Answer: 151.5k Explanation: |
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| 32. |
Which Is the correct order or boiling points |
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Answer» Answer: The order of BOILING POINT is DECIDED on basis of strength of hydrogen bonding in theses compound. Refer to Image Because H−F bonding >H−Cl>H−Br [Strength of hydrogen BOND] HIGHEST the hydrogen bonding point highest the boiling point. |
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| 33. |
Why one mole of hydrogen molecule and one mole of H atom have different masses? |
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Answer» Answer: helloExplanation: A MOLE of any substance has the same numerical value for the number of grams it contains as the number of atomic mass UNITS (amu). ... However, one mole of HYDROGEN atoms has a mass of 1 gram while one MOLE of hydrogen molecules has a mass of 2 grams. Recall that two hydrogen atoms BIND to make a hydrogen molecule.pls mark me as BRIANLIAST and like my answer |
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| 34. |
What should government do to prevent the misuse of such medicines? |
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Answer» Answer: Remember, drugs change the brain—and this can LEAD to addiction and ... Often during this period, children are exposed to SUBSTANCES such as ... This is an IMAGE of the cover of NIDA's Principles of Substance Abuse Prevention for Early ... will look at how childhood EXPERIENCES, including use of any drugs, ... |
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| 35. |
Balance the chemical equations mG+2hcl=MGCL2=H2 |
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Answer» ALREADY balanced Explanation: MG + 2HCl --> MgCl2 + H2 please MARK as brainliest!!!! |
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| 36. |
100mg/DL glucose solution (final volume is 100ml) prepare standard solution. |
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Answer» dupduxupfgghh .. |
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| 37. |
How can you separate a mixture of naphthalene and salt. Explain the technique employed and entire procedure.wrong answers will be reported. |
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Answer» SUBLIMATION................ |
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| 38. |
there are 80% person who like MS Dhoni and 20% who like Virat Kohli then what is the percent of like MS Dhoni |
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Answer» Answer: 60% virat KOLI like= 20% MS dhoni like =?
=all person - virat koli like = MS dhoni like =80 - 20 = 60 |
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| 39. |
Defferent between ethanol and acetic acid |
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Answer» Answer: Ethanol has SWEET ODOUR while ethanoic acid has pungent odour. Ethanol does not react with sodium bicarbonate (NaHCO₃) but ethanoic acid reacts with sodium bicarbonate (NaHCO₃) RELEASING CO2 gas. Ethanol does not CHANGE the colour of blue LITMUS paper while ethanoic acid change the colour of blue litmus to red. please mark as brainliest!!! |
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| 40. |
Cough syrup is common medicine used in cold and cough. It contains alcohol (ethanol) asone of its constituents. Some of the people use it as an alternative of wine.(a) What should government do to prevent the misuse of such medicines?(b) If 400 g of cough syrup contains 40g glucose and 20 g alcohol, what is the concentrationin the solution? |
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Answer» Answer: (a)government isma KYA kar KA karega yadi koi bura object ham sab KO health kar sakta hai to wa koi bura bat nehi hai *(B) in b no no you are saying wright |
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| 41. |
Valency of mn in mn2o7 is what |
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Answer» PLEASE MARK as BRAINLIEST!!!!! |
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| 42. |
Give me the calculation of 1 upon 6 into 10 to the power of 23 into 1 into 10 to the power of 22 |
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Answer» okkkkkkkkkkkkk, hmmmmmmmm. |
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| 43. |
What is the symbols of gold, mercury and cobalt |
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Answer» Gold STANDS for Au(came from LATIN WORD : 'Aurum') Mercury stands for HG(came from LATIN WORD:'Hydrargyrum') Cobalt stands for Co (came from GERMAN WORD:'Cobold') |
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| 44. |
8 demerits of medleeves periodic table |
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Answer» 1) He was unable to locate hydrogen in the periodic table. 2)Increase in atomic mass was not regular while moving from one element to another. Hence, the number of elements yet to be DISCOVERED was not predictable. 3)Later on, isotopes of elements were found which violated Mendeleev’s periodic law. 4) Position of hydrogen: Hydrogen is placed in group I. 5) Anomalous pairs: In certain pairs of elements, the increasing order of atomic masses was not obeyed. ... 6) Position of isotopes: Isotopes are the ATOMS of the same element having different atomic masses but same atomic number. Explanation: |
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| 45. |
How does solid catalyst enhance the rate of combination of gaseous molecule ? |
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Answer» Answer: When gaseous molecules COME in contact with the surface of a solid catalyst, a weak CHEMICAL bond is formed between the surface (catalyst) molecules and reactant (gas) molecules. ... The RATE of reaction INCREASE by adsorption of different molecules side by side facilitating the chemical reaction. |
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| 46. |
solve this question from class 11 ....... it's urgent.. |
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Answer» Answer: |
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| 47. |
There are how many chemical reaction s in chemistry |
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Answer» PLEASE MARK me as the brainliest Explanation: five The five basic types of chemical reactions are combination, decomposition, single-replacement, double-replacement, and combustion. ANALYZING the reactants and products of a given reaction will allow you to PLACE it into one of these categories. Some reactions will fit into more than one category |
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| 48. |
The standard electrode potentials are Zn +2 / Zn = -0.76 V , Fe +2 / Fe = - 0.44 V , H + / H 2 = 0 V &Cu +2 / Cu = 0.34 V . Which two electrodes should be combined to get a cell with largest EMF ? . Give net cellreaction & cell voltage |
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Answer» i don't KNOW.......... |
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| 49. |
find out the molar mass of x when 100g of x is dissolved in 500ml of solution if molarity of solution is 0.5 |
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Answer» If I had known, I WOULD have SAID TODAY Yoo Explanation: |
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| 50. |
Kach,kwartaj jaise thos se kis Parkar bhin hai? Kin pristhitiyo me kwartaj ko kach me rupantrit Kiya ja Sakta hai |
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Answer» Answer: VALVES are not used for my car and holding the baby in front o I hope it is a little too HARD SOLUTIONS to get the BOOBS out there fertilizes a c or a to see his body in front o the Boobs and I am 5AM I am the only person who is not a MAN of a c and I am the boss. |
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