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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. |
32. Correct order of intermolecular forcesA gas < liquid < solid B. liquid < gas < solidC. gas < liquid < solid D. gas = liquid = solid |
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Answer» ONG>ANSWER: a gas right answer |
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| 2. |
Electron dot diagram of methane |
| Answer» ONG>EXPLANATION: | |
| 3. |
What do you get if lead is heated with concentrated sulphuric acid |
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Answer» ONG>Answer: it will BURN white dazzling magnesium |
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| 4. |
During the manufacture of chlorine by the electrolysis of brine, the by-products are |
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Answer» ong>Answer: Chlorine can be MANUFACTURED by the electrolysis of a sodium chloride SOLUTION (brine), which is known as the CHLORALKALI process. The production of chlorine results in the co-products caustic soda (sodium HYDROXIDE, NaOH) and hydrogen gas (H2). These two products, as WELL as chlorine itself, are highly reactive. |
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| 5. |
Define chemical bond effervescence and precipitate |
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Answer» ong>ANSWER: I can't understand this QUESTION |
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| 7. |
Balance the following equatic NaHCO3 → Na2CO3+H2O+CcDC+H2SO4 — CO2+H2O+SO2i 1) PbS+O2 Soz+H2O)S+H2SO4 S02+H2OZnS+O2 → ZnO+SO2 |
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Answer» ONG>ANSWER: ccooo 9/.-/* gggt bao TYE awnbneser ANG baho kofdfdfdfdfd Explanation: n nnyushhsjkjjdkeeeoek mdfdfdfdf dfdfdfdfdfdfdfd |
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| 8. |
Write the IUPAC names of the following compounds CH2--CH2--CH2 | CH2--CH3 |
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Answer» ONG>ANSWER: CARBON dioxide Explanation: I THINK it can help you |
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| 9. |
What was the basis for the earliest attempts done for classification of elements? who suggested the first attemptsof this classification. |
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Answer» ONG>EXPLANATION: the TRAIDS of j.w.Duberine |
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| 10. |
12. Three cubes of a metal whose edges are in the ratio 3:4:5 are melted and converted into a single cube whose diagonal is 12√3 cm. Find the edges of the three cubes.INCERT EXEMPLAR) |
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Answer» ong>Answer: Let the edges of three CUBES be 3X, 4X and 5x respectively.
So, the volume of the cube after melting will be = (3x)³ + (4x)³ + (5x)³
= 9x³ + 64x³ + 125x³ = 216x³
Now, let a be the edge of the new cube so formed after melting
Then we have, a3 = 216x3 a = 6x
We KNOW that,
Diagonal of the cube = √(A2 + a2 + a2) = a√3 So, 12√3 = a√3 a = 12 cm x = 12/6 = 2 Thus, the edges of the three cubes are 6 cm, 8 cm and 10 cm respectively.
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| 11. |
Q2 calculate mass of 11.2 litre of CH4 at S.T.P. |
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Answer» ONG>Answer: The MASS of 11.2 litres of a certain gas at s.t.p. is 24 g. The gram MOLECULAR mass of the gas is 24g× 11.2L 22.4L/mol
=48g/mol Note: At s.t.p., 1 mole of any gas occupies a volume of 22.4 L. |
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| 12. |
Draw the electron dot diagram and structure of: a. Nitrogen moleculeb. Magnesium chlorideC. Methaned. Watere. OxygenCorrect answer will get brainlisted |
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Answer» is your answer Hope it HELPS you |
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| 13. |
The dilution effect in spectrophotometric titration is minimised by using (i) large concentration of titrand(ii) large concentration of titrant(iii) radiation of 2. between 200 – 400 nm(iv) monochromatic radiations |
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Answer» ONG>EXPLANATION: ഢർഡവ തന്നെ പറയാം എന്ന് വാശി ഞരഢ രസം എൻ വരെ ഡച്ച് ഈസ്റ്റ് റൂം വീടിന്റെ ഒരു തീരുമാനം എടുത്തു വേഗം രമ ജന്മം |
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| 14. |
I. The type of bonding present in metallic chlorides. |
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Answer» ong>EXPLANATION: ionic bonding is expected in METALLIC CHLORIDE is your answermaybe it's HELPFUL for you ☺️ |
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| 15. |
Elements A, B, C & D have atomic number 12, 19, 29, & 36 respectively on the basis of electronic configuration, write to which group of the periodic table each element belongs |
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Answer» ong>Answer: a - GROUP 2 b - group 1 c - group 11 d - group 18 hope the answer helps pls mark me as BRAINLIEST |
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| 16. |
What do you mean by saturated solution? How much water should be mixed with 12g of potassium nitrate to obtain 12% of potassium nitrate solution? |
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Answer» ong>Answer: SATURATED solution is a solution that contains the maximum amount of SOLUTE that is CAPABLE of being DISSOLVED. |
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| 17. |
Which amide does produce Propan-1-amine by Hoffmann bromamide degradation reaction with iupac name?? |
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Answer» ong>Answer: the amine produced by the HOFFMANN degradation of benzamide. Step by step solution by experts to help you in doubt clearance & scoring excellent MARKS in exams. Benzamide is an aromatic amide CONTAINING SEVEN carbon atoms. |
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| 18. |
State the conditions necessary for a chemical change or reaction to take place |
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Answer» ong>Answer: Condition necessary for a chemical reactions are : 2. The molecules or atoms of the Reactants must collide with one another 3. The speed of the reaction should be appreciable 4. The rate of reaction depend on : 1. Temperature 2. PRESENCE of light 3. Electricity 4. Pressure Explanation: Plz mark me as BRAIN list |
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| 19. |
How many values can I have for n=4? |
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Answer» ong>EXPLANATION: PLEASE search on YouTube Rajiv Kumar.RadhakrishnAnd subscribe the CHANNEL plz please mark as brainlist I'm your follower please mark as brainlist I'm your follower |
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| 20. |
Q No. 01: Complete and balance the following reactions with procedure a. Pb(NO3)2 +HCI _>b. Na2SO3 + HCI->c. Zn + H2SO4 ->d. AIN + H2O->e. NH3 +3Cl2--> |
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Answer» ONG>EXPLANATION: option a is the right one PLZ follow mw |
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| 21. |
3. non metallic character_____when we move in a modern periodic tablefrom left to right |
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Answer» ong>Answer: increases Explanation: Nonmetals tend to gain electrons in chemical reactions and have a high attraction for electrons within a compound. The most reactive nonmetals reside in the upper right portion of the periodic table. SINCE the noble gases are a special GROUP because of their LACK of reactivity, the element fluorine is the most reactive nonmetal. It is not found in nature as a FREE element. Fluorine gas reacts explosively with many other elements and compounds and is considered to be one of the most dangerous KNOWN substances. |
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| 22. |
The process of slow evaporation of a solution ..where solid particles can be obtained by quickly cooling down the vapours afterwards ki |
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Answer» ong>Answer: Living Science SOLUTIONS for CLASS 6 Science Chapter 5 Separation Of Substances are provided here with simple step-by-step explanations. These solutions for Separation Of Substances are extremely popular AMONG Class 6 students for Science Separation Of Substances Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the Living Science Book of Class 6 Science Chapter 5 are provided here for you for free. You will ALSO love the ad-free experience on Meritnation’s Living Science Solutions. All Living Science Solutions for class Class 6 Science are prepared by experts and are 100% accurate. please FOLLOW me or thanks me |
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| 23. |
Sublimation is commonly used for samples that are less than 100mg. |
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Answer» ong>Answer: Sublimation is the transition of a SUBSTANCE directly from the solid to the gas state,[1] without PASSING through the liquid state.[2] Sublimation is an endothermic process that OCCURS at temperatures and pressures below a substance's triple POINT in its PHASE diagram, which corresponds to the lowest pressure at which the substance can exist as a liquid. OKK... plz mark me as brainlist |
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| 24. |
What is the formula to find K equilibrium in thermodynamics |
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Answer» librium is when the rate of the FORWARD reaction EQUALS the rate of the reverse reaction. All reactant and product concentrations are constant at EQUILIBRIUM. Given a reaction aA+bB⇌cC+dD , the equilibrium constant also =k= Explanation: |
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| 25. |
Observe the diagram the answer the following question given below. |
| Answer» ONG>Answer: | |
| 26. |
calculate the limiting reagent when 40g of methane reacts with 30g of O2 find the mass of the product of C02? |
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Answer» ONG>ANSWER: Explanation: CH4+2O2---->CO2+2H2O 16gram of METHANE reacts with 64gram of O2 32.5g methane is LIMITING reagent |
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| 27. |
Ch 4 science class 9 notes |
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Answer» ONG>Answer: MAKE it own it will help you to revise it LATER also if you like my tip so mark it as brainlist |
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| 29. |
if the diffrence between the boiling point and the colling point of 10kg of judean aquous solution is 100.273 C how many grams of urea will be soluble in that solution |
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Answer» ong>Answer: Answer (d) 72 g... Explanation: Mark as brainiest...❤ Thank my answers...❤. Follow me for VERIFIED answers...❤... God bless u❤... |
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| 30. |
Write the equation for the laboratory preparation of:1,1 dibromoethane from ethyne |
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Answer» ong>Answer: PLEASE follow me please and make me as brainlist. |
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| 31. |
What is a chemical reaction |
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Answer» ong>Explanation: ꜰᴏᴜʀ ꜱQᴜᴀʀᴇꜱ ᴏꜰ ꜱɪᴅᴇ 1 ᴍ ᴇᴀᴄʜ ᴀʀᴇ ᴄᴜᴛ ꜰʀᴏᴍ ꜰᴏᴜʀ ᴄᴏʀɴᴇʀꜱ ᴏꜰ ᴀ ʙɪɢɢᴇʀ ꜱQᴜᴀʀᴇ ᴏꜰ ꜱɪᴅᴇ 4 ᴍ. ꜰɪɴᴅ ᴛʜᴇ ᴘᴇʀɪᴍᴇᴛᴇʀ ᴏꜰ ᴛʜᴇ ʀᴇᴍᴀɪɴɪɴɢ ᴘᴏʀᴛɪᴏɴ ᴏꜰ ᴛʜᴇ ʙɪɢɢᴇʀ ꜱQᴜᴀʀᴇ. (ᴀ) 16 ꜱQ.ᴍ (ʙ) 4 ꜱQ.ᴍ (ᴄ) 12 ꜱQ.ᴍ (ᴅ) 20 ꜱQ.ᴍ ᴄʜᴏᴏꜱᴇ ᴛʜᴇ ᴄᴏʀʀᴇᴄᴛ ᴏɴᴇ ᴀɴᴅ ᴇxᴘʟᴀɪɴ ᴡʜʏ ɪꜱ ᴛʜᴇ ᴀɴꜱᴡᴇʀ ꜱᴏ.. |
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| 32. |
Write a short note an acid and base with suitable examples |
| Answer» ONG>Above SNAP is the ANSWER..... | |
| 33. |
60 g of carbon and 60 g of magnesium elements have a molar ratio 2 : 1 [Atomic mass of C = 12 u, Mg = 24 u]. |
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Answer» ONG>Answer: 2:1 Explanation: No. of moles 60 g of carbon= 60/12 No. of moles in 60 g of magnesium= 60/24 RATIO= 60/12:60/24 =60/12×24/60 =2:1 Hence Proved |
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| 34. |
Table1. 1 relative atomic mass of some elements |
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Answer» ONG>ANSWER: hgfjchgsjfjbcbshbsjbsbhhgzjvshdvdvuxbchshghhsvw xhdbbj nj gj v j f jg h g gh g f jcjdhx. jcbxinc. h cgsl x. jb Explanation: hcb dh. s hzvd b m, d k nd k jc. jjdbx. ncnjdnc cj.x cj. djbxbrh. c h dhcnxhd. jc djc. jdnndjHf. gvgjs. vhsns bsjbsbbvhvsbbsjs dhbdbdbd dbbhhdvjsbdbjdbdbhdjdbdbbdjdube XJ sjs jdbdj disgs djid ejdibdnidbd djdbjd djd djvdkd dh djd dnd dj d djbskd djgdks dj dkd dinjd sjd jd SKD sks jd sjd dn dn dkd nd djd nd dm dmd kdd kd dkd kd dk djdhd hc dhd xh djc djx FJN |
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| 35. |
When aqueous solution of silver nitrate and sodium ______chloride are added Coloured precipitate is formed and the reaction is called____Reaction |
| Answer» ONG>Answer: | |
| 37. |
What is different between acid and base |
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Answer» ong>Answer: A SUBSTANCE, mostly liquid that donates a PROTON or accepts an electron pair in reactions. An acid increases the concentration of H+ ions. A BASE is a substance that RELEASES hydroxide (OH-) ions in aqueous solution, donates electrons and accepts protons. |
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| 38. |
Why CO2 lab preparation is used in collecting of gas? |
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Answer» ONG>Answer: Co2 is carbondioxide MEANS plants taking gas plants COLLECTING gas so it is a known as collecting gas |
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| 39. |
C Atomic mass is of Calculate the molecular Hears of the followingCompounds:Mg.24,0-16, lt-), L-12,9-32ca -40, (1-35.5)а) ,)a) Mg sou by Ca CH (G) ₂ (C) Hcl |
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Answer» ong>Explanation: c ATOMIC c Atomic mass is of Calculate the MOLECULAR Hears of the following Compounds: Mg .24,0-16, LT-), L-12,9-32 ca -40, (1-35.5) а) ,) a) Mg sou by Ca CH (G) ₂ (C) HCL is of Calculate the molecular Hears of the following Compounds: Mg .24,0-16, lt-), L-12,9-32 ca -40, (1-35.5)c Atomic mass is of Calculate the molecular Hears of the following Compounds: Mg .24,0-16, lt-), L-12,9-32 ca -40, (1-35.5) а) ,) a) Mg sou by Ca CH (G) ₂ (C) Hcl а) ,)c Atomic mass is of Calculate the molecular Hears of the following Compounds: Mg .24,0-16, lt-), L-12,9-32 ca -40, (1-35.5) а) ,) a) Mg sou by Ca CH (G) ₂ (C) Hcl a) Mg sou by Ca CH (G) ₂ (C) Hcl |
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| 40. |
What is sterioisomers |
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Answer» ONG>Answer: In stereochemistry, stereoisomerism, or spatial isomerism, is a form of isomerism in which MOLECULES have the same molecular formula and sequence of bonded ATOMS, but differ in the three-dimensional orientations of their atoms in space |
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| 41. |
Write the equation for the laboratory preparation of:ethylene from1,2,dibromoethane |
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Answer» ong>Answer: Reaction: CH 2 Br−CH 2 Br alc.KOH CH 2 =CHBR NaNH 2
CH≡CH (ETHYNE)
In the reaction first β elimination reaction of the alkyl halide TAKES place to FORM the corresponding alkene. This alkene on reaction with SODAMIDE forms corresponding alkyne.(As NaNH 2 is strong base)
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| 42. |
On the basis of your understanding of the following paragraph and the related studied concepts : [1 x 4 = 4M] Baking soda is used in small amounts for making bread and cakes. It helps to make these soft and spongy . An aqueous solution of baking soda turns red litmus blue. It is also used in soda acid fire extinguisher. Use this information to answer the following questions : 1 Write the equation for the reaction between baking soda and acid.2 What is the reaction involved when it is heated ? |
| Answer» ONG>ANSWER: | |
| 43. |
Two radiations one having red colour ( Lambda =7.5 * 10 to the power - 5 cm) and other with orange colour ( Lambda = 6.2 * 10 to the power - 5 cm.) which will have higher energy.. |
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Answer» KS FOR THE FREE POINTS PLEASE MARK AS BRAINLIST ANSWER I NEED ONLY 50 BRAINLIST ANSWER AND PLEASE ALL FOLLOW ME |
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| 44. |
Write chemi Cal formula of the sulphates of aluminium ammonium and zinc |
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Answer» ong>Answer: Valencies of aluminium, AMMONIUM and zinc are 3, 1 and 2, RESPECTIVELY. The valency of sulphate is 2. Hence, chemical FORMULAE of the sulphates of aluminium, ammonium and zinc are Al2(SO4)3, (NH4)2SO4 and ZnSO4. Explanation: pls MARK my ans as brainlist |
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| 45. |
Find the molarity of 132 grams in 500ml it's solution is ( in mol/L ) |
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Answer» ONG>Explanation: The molar mass of NaCl is 23.0+35.5=55.5 g/mol 29.25 grams of NaCl corresponds to 55.5g/mol 29.25g
=0.527 moles. The molarity of NaCl solution will be the ratio of the NUMBER of moles of NaCl present in 1 L of solution. The molarity of NaCl solution is 1.5L 0.527 moles
=0.33M |
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| 46. |
Factorise 2x^2-35x-18 |
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Answer» ONG>Explanation: 2x²-35x-18 2x²-36x+1x-18 2x(x-18)+1(x-18) (x-18)(2x+1) |
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| 47. |
Date: Page10,2 gram of magnesiome is burst in a closedvessel containing 1.29 gram of oxygen to producemagnesium oxide.i) Find the limiting reagent .ii)Calculate the number ofmolecules of unreacted reagent left over.iii) What mass of Mgo is produced.IV) How many grams of pure HCL are required to neutralize whole MgO produced. |
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Answer» ong>Answer: ANSWER Balanced REACTION is: 2Mg+O 2
→2MgO According to the reaction 2 mol (or 2×24.3=48.6g) Mg reacts with 32 G oxygen. 1 g of Mg requires = 48.6 32
=0.66g oxygen but GIVEN oxygen is 0.5 g ∴ oxygen is the LIMITING reagent 0.5 g oxygen can burn == 32 48.6
×0.5=0.75g Mg Excess of Mg left =1−0.75=0.25g please follow me or thanks me please |
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| 48. |
16. Calculate the number of atoms in 69 U of Na and 69 gm of Na |
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Answer» ONG>Answer: w=69, m=23, mou=weight/mass=69/23=3 and we know in 1 MOLE=6.022×10²³ so in three mole =3×6.022×10²³ =18.069×10²³ |
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| 49. |
Find number of moles for 2g of Nacl |
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Answer» ong>ANSWER: may be my answer helps you Explanation: Molar mass of
NUMBER of moles in 20.0 g NaCl is 20.0 g 58.4 g /mol = 0.342 mol |
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| 50. |
6. An elementary particle of matter of a group of atoms of different elementsbehaves like a single unit with a charge in it.This statement defines which one of these?(1 Point)ProtonRadicalBoth |
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Answer» ong>Answer: An ATOM or group of ATOMS of the same or of different elements that BEHAVE as a single unit with a positive or negative charge is known as radical. Hence the correct OPTION is B Hope it helps you........... |
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