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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. |
name the metal which are refined electrolytically in electrolytic refining Only direct current are used why |
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Answer» Answer: Electrolytic refining:- MANY metals, such as COPPER, zinc, tin, nickel, SILVER, gold ETC. are refined by electrolysis. In this process, the impure metal is made the anode and a thin strip of PURE metal is made the cathode. |
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| 2. |
Fromation of a magnesium chloride |
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Answer» I am not UNDERSTAND the QUESTION. |
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| 3. |
19. What is the difference between economic and non economic activities? |
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Answer» The ACTIVITIES which add value to the national income are CALLED economic activities. In simple language we can say that those activities which are performed for money are called economic activities and those which are not performed for MONETARY gains are called non-economic activities. |
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| 4. |
With the help of molecular orbital theory predict the magnetic behavior of O2And O2 positive |
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Answer» dffffttjjjhhbhhbhhggghjjjkkkkn. V vfgrt |
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| 5. |
3. Which of the following statement is true?Mass number is the combination of proton and neutronMass number is the combination of electron and protonAtomic number represents neutron numberElectrons are found in the nucleus |
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Answer» Answer: |
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| 6. |
On a ship sailing in Pacific Ocean when temperature is 300k, a balloon is filledwith 3 litres of air. What will be volume of balloon when ship reaches Indian Ocean,when temperature is 310K? |
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Answer» Answer: CHARLES law explain when pressure remains constant with variation in VOLUME and TEMPERATURE |
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| 7. |
18. The orbital interactions shown below representsp2 orbitalsogo+sobitaks(a) CH3---Al interactions in Al2(CHI).(b) B-H interactions in BH6(C) CH3-Li interactions in Li_(CH3)4(d) CH3CH2-Mg interactions in ErUgBr(OEt2)2 |
Answer» Here is your answer•solid •liquid •gas |
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| 8. |
Ture or false1.the number of lone pair in a molecule of water is two 2.the basicity of ethanoic acid is two 3.when sodium hydroxide is limited amount is mixed with copper sulphate solution the colour of precipitate is pale blue 4.1 gram is relative to molecular mass expressed In gram |
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Answer» The ANSWER is of the question. |
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| 9. |
during nucleophilic substance involving neighbouring group participation there is a ____of configuration |
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| 10. |
Which of the following solution has normality equalto molarity?(1) H2SO4 aqueous solution(2) H3PO4 aqueous solution(3) HNO3 aqueous solution(4) Mg(OH), aqueous solutionwith explanation |
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| 11. |
calculate the molar mass of carbon dioxide and ratio by mass of its constituent elements( ∧12∨6 C , ∧16∨8 O |
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| 12. |
Write the name and formulae of the oxoacids of clorine, explain their structure and acidic nature |
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Answer» Oxoacid of chlorine Chemical formula Hypochlorous acid HOCL or HClO Chlorous acid HOCLO or HClO2 Chloric acid HOClO2 or HClO3 Perchloric acid HOCLO3 or HClO4 |
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| 13. |
ᴡʜᴀᴛ ɪs ᴀᴛᴍᴏsᴘʜᴇʀᴇ? answer in 50- 100words |
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Answer» An atmosphere is a layer or a set of LAYERS of gases surrounding a PLANET or other material BODY, that is held in place by the gravity of that body. An atmosphere is more likely to be retained if the gravity it is subject to is high and the temperature of the atmosphere is LOW. ࿐. |
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| 14. |
Explain the role of limiting reagent in the limiting the amount of the product formed. |
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Answer» The LIMITING reagent (or limiting reactant or limiting AGENT) in a chemical reaction is a reactant that is totally consumed when the chemical reaction is COMPLETED. The amount of product formed is LIMITED by this reagent, since the reaction cannot continue without it. |
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| 15. |
Write the steps to print a presentation |
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Answer» Answer: PRINT your presentation Select FILE > Print. For Printer, select the printer you want to print to. For Settings, select the OPTIONS you want: Slides: From the drop-down, choose to print all slides, SELECTED slides, or the current slide. ... For Copies, select how MANY copies you want to print. Select Print. |
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| 16. |
1. Which of the following is not a subatomic particle?ElectronProtonNucleusNeutron |
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| 17. |
in the laboratary preparation of hydrogen from zinc and dilute hydrochloric acid the zinc used is granolated zinc . give reason |
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Answer» use zink granules Explanation: In preparation of hydrogen by reaction with HCl, granulated ZINC is preferred INSTEAD of blocks of zinc because, zinc blocks are non-porous. Due to this reaction will be very slow. Hence it is preferred to use zinc granules. UR WELCOME MATE............... hope it helps |
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| 18. |
Write the structures of A,B,C in the following reactions.(i) C6H52+4−2/→ ∆/→ 3+.→ (ii) CH3CH2Br → → 200 C(iii) CH3COOH 3→ ∆A → 2/→ |
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Answer» please give me BRAINLIEST and fellow me... |
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| 19. |
The concentration of CO in a sample of air found to be 80 ppm. Find the mass of CO in 100 g of air |
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Answer» PLEASE MARK me as BRANLIST PLZ plz plz plz plz plz plz plz plz plz plz plz plz plz plz |
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| 20. |
300 gm of caco3ca=20,c=12,0=12 find itsnumber of mole |
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Answer» |
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| 21. |
Any one plz right answer |
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Answer» 1] catalyst - e] Xenon 2] photosynthesis - a]carbon dioxide 3] RUST - b] hydrated ferric oxide 4] INERT gas - c] manganese dioxide 5] nitrogen - d] SYNTHESIS of proteins HOPE IT WOULD BE HELPFUL !!!!!!!!!!!!!! |
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| 22. |
The hydrogen atom is paramagnetic. a hydrogen molecule is |
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Answer» A HYDROGEN atom has 1 electron only and so it is unpaired. Paramagnetism arises DUE to the PRESENCE of unpaired ELECTRONS. In hydrogen molecule, the TWO atoms share their electrons to complete their duplet and get 1s2 configuration. thus, there are 2 paired electrons in hydrogen molecule and it is diamagnetic |
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| 23. |
Explain briefly the postulates of the bohrs atomic theory of 5 points |
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Answer» Explanation: Thomson’s ATOMIC Model- POSTULATES According to the postulates of Thomson’s atomic model, an ATOM resembles a sphere of positive charge with electrons (negatively charged particles) present inside the sphere. The positive and negative charge is equal in magnitude and therefore an atom has no charge as a whole and is electrically neutral. Thomson’s atomic model resembles a spherical plum pudding as well as a watermelon. It resembles a plum pudding because the electrons in the model look like the dry fruits embedded in a sphere of positive charge just like a spherical plum pudding. The model has ALSO been compared to a watermelon because the red edible part of a watermelon was compared to the sphere having a positive charge and the BLACK seeds filling the watermelon looked similar to the electrons inside the sphere. Thomson's atomic model Thomson’s Atomic Model (Source Credit: Wikipedia) Limitations of Thomson’s Atomic Model Thomson’s atomic model failed to explain how the positive charge holds on the electrons inside the atom. It also failed to explain an atom’s stability. The theory did not mention anything about the nucleus of an atom. It was unable to explain the scattering experiment of Rutherford |
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| 24. |
True or false the valency of element of atomic number 17 is -1 |
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Answer» true is your answer.......... |
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| 25. |
Write any 5 differences between ayonic and covalent bonds |
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Answer» Answer: Polarity High Low SHAPE No definite shape Definite shape Melting POINT High Low Boiling Point High Low Explanation: |
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| 26. |
a ball of mass 2kg from a height of 5 makers. what is its kinetic energy when huts rashes the ground |
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Answer» A metal ball of mass 2kg is allowed to fall FREELY from rest from a height of 5m above the ground ➡ 100joule. Given that, A ball of mass 2kg is allowed to fall freely from rest to a height of 5metres. Using the formula : ❃ K. E. (kinetic energy) = mgh Where, m (mass) = 2kg g (acceleration due to gravity) = Procedure : ➡ K. E. = mgh ➡ K. E. = 2*5*10 ➡ K. E. = 100 joule. This is the total energy as K.E is zero when the ball is at maximum height that is when it is at 5 m. Hence when the ball reaches the ground P.E becomes zero because of zero height.At this point,the total energy is equal to the K.E that is K.E=100J. |
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| 27. |
Total number of atoms in 44g of CO2 isa)6.02×10^23b)6.02×10^24c)1.806×10^24d)18.06×10^22please help me you will answer my questions then i will follow |
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Answer» C)1.806×10^24 Explanation: |
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| 28. |
Explain briefly the postulates of the bohrs atomic theory |
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Answer» Explanation: The Bohr MODEL postulates that ELECTRONS orbit the NUCLEUS at fixed energy levels. Orbits further from the nucleus EXIST at higher energy levels. When electrons return to a lower energy level, they emit energy in the form of light |
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| 29. |
Calculate no: of particles in 4g of O2 molecule |
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Answer» Answer: 7.525 X 10^22 particles Explanation: the NUMBER of MOLES of O2 is 4/32= 0.125 moles given 1 mol ---> 6.02 x 10^23 particles 0.125 mol ---> x x/0.125 = 6.02x10^23/1 x= 7.525x10^22 |
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| 30. |
To you Na,Zn,K,Ag, Ca, Fe, Pb and Au metals are provided. In this which metals are extracted throughelectrolysis, reduction using carbon and in native state in the metallurgy process. |
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Answer» j.bv,How r57eiyfilhyidgjfouh kbhhj |
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| 31. |
Find the number of moles in the 48 gm of cordn |
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| 32. |
1.Calculatethemolecularmassesof H,, 02, Cl, CO2, CH4, C,H6C_H, NH3, CH,OH. |
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Answer» O2=32 Cl=35.5 CO2=44 CH4=16 C=12 H6=6 CH=13 NH3=17 CH=13 OH=17 |
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| 33. |
अणु गति के सिद्धांत के आधार परचाlrs के नियm kiव्याख्या कीजिए |
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Answer» MARK me as a BRAINLIEST |
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| 34. |
सम आयन प्रभाव को उदाहरण द्वारा समझाइए |
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Answer» ANSWER: कृपया अपना प्रश्न अंग्रेजी में डाले मुझे केमिस्ट्री हिन्दी में नहीं आती| धन्यवाद! |
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| 35. |
Remember glycerol, lauric, myristic, palmitic, stearic, oleic, linoleic, linolenic acids, phosphate group, choline, ethanolamine alcohols. Name the lipid. Compounds are Hydrolysis reaction of the lipid consisting of glycerol, any one PUFA, oleic acid, phosphate group, ethanolamine alcohol |
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Answer» रिमेंबर दिली से रोल फ्लोरिंग मींस सेकंड हाइड्रो कॉलोनी चौक |
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| 36. |
12. 2,3 dichlorobutane can exist as number of stereo-isomers(a) One(b)Two (c) Three (d) Four |
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Answer» FIRST MARK me as BRANLIST PLZ plz plz plz plz plz plz plz plz plz plz plz |
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| 37. |
Molar heat capacity of water at constant pressure is 75 joule per mole Kelvin what will be the increase in the temperature of hundred gram of water when 1 joule energy is supplied to the samplePls note that 1j energy is being supplied not heat PLZ answer it correctly and I will surely mark it as brainliest . |
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Answer» SORRY I don't KNOW this anawer Explanation: MARK me as BRAINLIEST |
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| 38. |
Why should curd and sour substance not be kept in brass and copper vessels ? |
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Answer» Answer: If these kinds of SUBSTANCES which possess ACIDS are kept in COPPER containers or vessels they will react and produce salt and hydrogen and the VESSEL will be corroded. It can also produce harmful products that may spoil the FOOD. |
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| 39. |
Is used when the alkalinity of water is22.very lowa. Sodium dihydrogen phosphateb. Sodium phosphatec. Disodium hydrogen phosphated. AllFinish attempt...Previous page |
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| 40. |
Standard State of Carbon is Solid. Justify it....please answer fast |
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Answer» STANDARD STATE of CARBON is GRAPHITE which is solid |
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| 41. |
if a body having mass 2kg is at a having of 5 meter from the ground what is the potential energy if g=10 m/s² |
Answer» Given :Mass of the body = 2Kg Height from the ground = 5m Gravitational field = 10m/s² To FIND :The potential energy of the body Solution :Potential energy is energy due to position.
Potential energy of an object is given by
where, P.E denotes potential energy. m denotes mass. g denotes gravitational field. h denotes height. By substituting all the given values in the formula, ➠ P.E = mgh ➠ P.E = 100J thus, potential energy of the object is 100J. |
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| 43. |
Suppose a gas sample contains 3 x 1023molecules. Each 1/3rd of the molecules have speed2 x 103 cm/s, 3 x 103 cm/s and 4 x 103 cm/s. Therms speed (in cm/s) of gas sample will be[NCERT Pg. 148]29 x 106(1)3(2)11x 1063(3)3 x 106(4) V15 x 106 |
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Answer» Answer: If solid PARTICLES are in LIQUIDS, they PASS through FILTER PAPER. |
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| 44. |
Expain the functions of hormones secretef by Pituitary gland.it's urgent |
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Answer» Hormones secreted from the pituitary gland help to control GROWTH, blood PRESSURE, energy management, all functions of the sex organs, thyroid GLANDS and metabolism as well as some aspects of PREGNANCY, childbirth, breastfeeding, water/salt concentration at the kidneys, temperature regulation and pain relief. |
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| 45. |
Cyclohexane has only planar conlommation10. Which of the following is not true for methyl cyclohexane?(a) There are two 1,3 diaxial interactions in axial conformation?(b) There are two gauche interactions in axial conformation(c) Energy of axial conformation is more by 1.7 kcal/mole than equatorialconformation(d) Energy of axial conformation is less by 1.7 kcal/mole than equatorial conformation |
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Answer» which CHAPTER plese tellbme then i will answer you Explanation: WITHOUT NAME of chapter we will confuse mark as brainlist |
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| 46. |
What is the standard state of carbon? Justify your answer. answer fast.... |
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Answer» Answer: solid (1) Every substance is shown in its STANDARD state. This is the PHYSICAL state (solid, liquid, or gas) that a substance would be in under standard conditions. THUS, the standard state for carbon is solid, for water is liquid and for HYDROGEN is gas. |
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| 47. |
10. Which of the following is not true for methyl cyclohexane?(a) There are two 1,3 diaxial interactions in axial conformation?(b) There are two gauche interactions in axial conformation(c) Energy of axial conformation is more by 1.7 kcal/mole than equatorialconformation(d) Energy of axial conformation is less by 1.7 kcal/mole than equatorial conformation |
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Answer» PLZ MAKE me BRAINLIEST FIRST |
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| 48. |
Sabe ke dp dekho.............tex]\blue{\bold{\underline{\underline{}}}}[/tex] |
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Answer» Explanation: SACH mein tumhare 3 I'd KE POINTS khagye . Kittne kamine HAI . |
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| 49. |
Q.27. In IVA group, of p-block, melting and boilingpoints of elements(A) Increase(B) Decrease |
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