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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. |
Compounds deposited in chemical vapour deposition method |
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Answer» Answer: Explanation: Chemical vapor deposition (CVD) is a vacuum deposition method used to produce high quality, high-performance, solid materials. The process is often used in the semiconductor industry to produce thin films. In typical CVD, the wafer (substrate) is exposed to one or more volatile precursors, which react and/or decompose on the substrate surface to produce the desired deposit. Frequently, volatile by-products are also produced, which are removed by gas flow through the reaction chamber. Microfabrication PROCESSES widely USE CVD to deposit materials in various forms, including: monocrystalline, POLYCRYSTALLINE, amorphous, and epitaxial. These materials include: silicon (dioxide, CARBIDE, nitride, oxynitride), carbon (fiber, nanofibers, nanotubes, diamond and graphene), fluorocarbons, filaments, tungsten, titanium nitride and various high-k dielectrics. |
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| 2. |
Define diffusion is it faster in summer or winter why |
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Answer» Answer: The flow of gas molecules from higher concentration TOWARDS the LOWER concentration is CALLED diffusion. It is FASTER in summer season. |
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| 3. |
Chemical equation like bariumchloride+aluminiumsulphate=bariumsulphate+aluminiumchloride |
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Answer» Potassium iodide + LEAD nitrate = Potassium nitrate + lead iodide. Hope it helps......... |
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| 4. |
Comparison of hydrogen generated by water and urine |
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Answer» no Explanation: COMPARISON of HYDROGEN GENERATE by only WATER |
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| 5. |
Definition coordination number of cubic close packingg |
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Answer» Answer: The body-centered CUBIC (bcc) has a coordination NUMBER of 8 and contains 2 atoms per UNIT CELL. The SIMPLE cubic has a coordination number of 6 and contains 1 atom per unit cell. |
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| 6. |
Chemical equation of aluminium copper chloride gives aluminium chloride + copper |
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| 7. |
Why evaporation produces cooling???GIVE A DESCRIPTION OF 3MARKS |
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Answer» Answer: during the PROCESS of evaporation the water is converted into water VAPOUR. so it takes more energy to evaporate. it MAKES the SURROUNDING COOL |
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| 8. |
Evaporation diffusion takes place in haphazard and random way state true or false |
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Answer» DIFFUSION takes place in haphazard and RANDOM WAY answer is true |
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| 11. |
which black hole was coming towards the earth at 110 km per second. let's seee who ccan annswer first |
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| 12. |
What is the molarity of HNO3 (63.0 g/mol) in a solution that has a specific gravity of 1.42 and is 52% (w/w) HNO3? |
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Answer» |
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| 13. |
Molecular formula is the multiple of emperical formula give example |
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Answer» Explanation: The molecular FORMULA of a compound may be the empirical formula, or it may be a multiple of the empirical formula. For example, the molecular formula of BUTENE, C4H8, shows that each freely EXISTING molecule of butene contains four atoms of carbon and EIGHT atoms of hydrogen. Its empirical formula is CH2 |
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| 14. |
(ii) Which substance would you advise to be used formaking heating elements of electric irons?(a) a (b) P(c) R (d) S |
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Answer» Answer: Nichrome: Most resistance wire heating ELEMENTS USE nichrome 80/20 (80% Nickel, 20% Chromium) wire, ribbon, or STRIP. |
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| 15. |
Arrange the following in decreasing order if their basic strength --I) (C2H5)3N, (C2H5)2NH, C2H5NH2, NH3.II) (CH3)3N, (CH3)2NH, CH3NH2, NH3.Please answer... |
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Answer» wvvwbwbwbbwvwvwvbw Explanation: wjjwjwvw |
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| 16. |
Strong acid with strong base titration |
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Answer» Answer: The purpose of a strong acid-strong BASE titration is to determine the concentration of the ACIDIC solution by titrating it with a basic solution of known concentration, or vice-versa, until neutralization occurs. ... THEREFORE, the REACTION between a strong acid and strong base will result in water and a salt. Hope it helps you Please mark me as brainliest Thank you |
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| 17. |
S.i unit of tempurature |
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Answer» Answer: The Kelvin The kelvin is the SI unit of thermodynamic temperature, and one of the SEVEN SI base units. Unusually in the SI, we ALSO define another unit of temperature, called the degree Celsius (°C). Temperature in degrees Celsius is obtained by SUBTRACTING 273.15 from the numerical value of the temperature expressed in kelvin |
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| 18. |
What if h2so4 which is a acid react with Na or Fe or Mg |
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Answer» Answer: Fe + H2so4 = FESO4 + H2 Mg + H2so4 = Mgso4 + H2 |
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| 19. |
Two elements X and Y are located in p-block of the periodic table with p’ and p electronicconfiguration respectively. Both combine to form a binary compound of formula XY, inwhich octet of X and Y both are complete. Hybridization of X in XYn, is1.sp2.sp23.sp34.sp3d |
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Answer» SP2. tqew |
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| 20. |
Explain enthalpy of formation of methane |
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Answer» Answer: Here's Your Answer Explanation: The standard enthalpy of formation, ΔH∘f , for a given COMPOUND is DEFINED as the enthalpy change of reaction when one MOLE of said compound is FORMED from its constituent elements in their most stable form. So, you know that the average C−H bond enthalpy is equal to 414 kJ/mol . |
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| 21. |
91) match the followingNatural tourism productA>Taj Mahalb) Jion ecobett Nationalpartman made tourism sawProductGolden pagoda;Tengapanad) Holi of pathutasite based tourismpooductsymbiotic tourismc cz zzProductd) wind lifeEvent based tourismproduct |
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Answer» hyycte buvrrw kvgxxrzez kkgfsr |
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| 22. |
Give reason why : (a) Na acts as an reducing agentwhile chlorine acts as an oxidising agent in thereaction : 2Na(s) + Cl2 (g) → 2NaCl(s)(b) White coloured AgCl turns grey when kept insunlight(c) Colour of the solution changes when iron nailis dipped in copper sulphate solution.(d) Lime water turns milky when CO2 is passedthrough it? |
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Answer» HOPE you UNDERSTAND it WELL. |
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| 23. |
8. What is the relation of electronic structure of an atom with its position in thmodern periodic table? |
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Answer» The ELECTRONIC configuration of an atom relates to its position in the modern periodic table as when we ARRANGE the electrons in the 1st , 2nd , 3rd and 4th shells i.e. ... So, its' electronic configuration is 2,8,1 and its VALENCY is +1 . This element therefore COMES in Group 1 with +1 valency. Explanation: please mark me as a brainiest |
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| 24. |
(2) बताईये कि निम्नलिखित अभिक्रियाओं में निकाय की एन्ट्रापी में वृद्धि अथवाकमी होगी।(i) 2SO2 (g)+02 (g)2SO3(g)(ii) N2(s)+3H2(g)2NH3(g)(iii)O2 (g)20(g) |
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| 25. |
Which materials are required for seperation of gases from air |
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Answer» Answer: Precooling of air - To separate air into its components, it must first be liquefied at an extremely LOW temperature. As a first step, the COMPRESSED air is precooled with chilled water. Purification of air - IMPURITIES such as water vapour and carbon dioxide are then removed from the air in a so-called MOLECULAR sieve. |
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| 26. |
C11H23COOHCH3 +O2 gives whatc11 h23 cooch3 |
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Answer» Explanation: Aavnjgqry |
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| 27. |
Give an example of a photochemical reaction involving silver salt |
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| 28. |
In a periodic table, group 1,2,4 and 5 all have special names. what are they? |
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Answer» what is perodoc table I do not KNOW so I can not GIVE answer |
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| 29. |
Explain in detail:-zwitter ion |
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Answer» MAA @*$# Explanation: |
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| 30. |
Which is not used as standard or reference electrode for potentometric titrationa) Std hydrogen electrodeb) Saturated calomel electrodec) Silver silver chloride electroded) Glass membrane electrode |
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Answer» Answer: d) glass membrane electorade Explanation: Copper ELECTRODE cannot FORM the inner reference electrode in glass ELECTRODES |
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| 31. |
Origin of FibresNaturalSyntheticPlantNylonAcrylicBastZ FruitGrassWool FurCottonSisalBambooHempBased on the above flow chart choose the correct one among the following.1i) y is Rayonii) Pis Juteiii) 0 is Banana |
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Answer» NATURAL fibre Explanation: |
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| 32. |
HF(aq) + NaOH → NaF(aq) + H2O(2) AH = -68.6 kJ/mol The high negative value of heat ofreaction is due to: |
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Answer» Explanation: For example, in the balanced chemical EQUATION 2 H2(g) + O2(g) → 2 H2O(ℓ) we recognized the equivalences 2 mol H2 ⇔ 1 mol O2 ⇔ 2 mol H2O where ⇔ is the mathematical symbol for “is equivalent to.” In our thermochemical equation, however, we have another QUANTITY—energy change: 2H2(g) + O2(g) → 2H2O(ℓ) ΔH = −570 kJ This new quantity allows us to add another equivalence to our list: 2 mol H2 ⇔ 1 mol O2 ⇔ 2 mol H2O ⇔ −570 kJ That is, we can now add an energy amount to the equivalences—the enthalpy change of a balanced chemical reaction. This equivalence can also be used to construct conversion factors so that we can relate enthalpy change to AMOUNTS of substances REACTED or produced. Note that these equivalences address a concern. When an amount of energy is listed for a balanced chemical reaction, what amount(s) of reactants or products does it refer to? The answer is that relates to the number of moles of the substance as indicated by its coefficient in the balanced chemical reaction. Thus, 2 mol of H2 are related to −570 kJ, while 1 mol of O2 is related to −570 kJ. This is why the unit on the energy change is kJ, not kJ/mol. For example, consider the thermochemical equation H2(g) + Cl2(g) → 2 HCl(g) ΔH = −184.6 kJ The equivalences for this thermochemical equation are 1 mol H2 ⇔ 1 mol Cl2 ⇔ 2 mol HCl ⇔ −184.6 kJ Suppose we asked how much energy is given off when 8.22 mol of H2 react. We would construct a conversion factor between the number of moles of H2 and the energy given |
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| 34. |
Give the equation to calculate energy of orbit for principal quantum number (n) |
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Answer» Answer: The energy level of an orbit is DETERMINED by the (n+l) VALUE of that particular orbit. To calculate the energy level of 5s orbital, we need to calculate the (n+l) value that is (5+0) = 5. What are 4 Types of Orbitals? In Orbitals CHEMISTRY, each principal orbit is made up of MANY subshells. |
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| 35. |
Swer QuestionsDefine element and classify the elements with examples |
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Answer» Answer: The atomic number of an element is equal to the number of PROTONS in each atom, and defines the element. For example, all CARBON atoms contain 6 protons in their atomic NUCLEUS; so the atomic number of carbon is 6. |
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| 36. |
WHAT IS THE WORD EQUATION FOR THE REACTION:Potassium permanganate reacts with citric acidWHAT PRODUCT IS FORMED? |
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Answer» ❥ᴀɴsωᴇʀ ↴ ●3kmno4+C6H8O7_:3Hmno4+c6H6K3O7. it means when we ADDED POTASSIUM PERMANGANATE to citric ACID . the REACTION will be hydrolysis reaction.❀༄ ●ᴛʜᴇ ʀᴇᴀᴄᴛɪᴏɴ ɪs ʜʏᴅʀᴏʟʏsɪs ʀᴇᴀᴄᴛɪᴏɴ...❀༄ |
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| 37. |
Explain standard hydrogen electrode |
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Answer» The standard hydrogen electrode is a redox electrode which forms the BASIS of the thermodynamic SCALE of oxidation reduction POTENTIALS |
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| 38. |
27. Hydrocarbons are main source ofb) Diesela) Petrolc) Kerosencd) All of these |
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Answer» Hydrocarbons are naturally-occurring compounds and form the basis of CRUDE oil, natural gas, coal, and other IMPORTANT energy sources. Hydrocarbons are highly combustible and produce carbon dioxide, water, and HEAT when they are burned. Therefore, hydrocarbons are highly effective as a source of fuel. |
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| 39. |
What is meant by term Osmosis?? |
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Answer» Answer: The GRADUAL passing of a liquid through a THIN LAYER of MATERIAL a membrane.Explanation: Hope it helps you.♥.♥.♥Hope it helps you.♥.♥.♥Stay safe with your family...Hope it helps you.♥.♥.♥Stay safe with your family...Don't forget to smile TODAY. .. |
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| 40. |
Write down the electron distribution of Silicon atom (Z-14). How many electrons are there in A. shell? |
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Answer» l shell= 8 m shell=4 Explanation: |
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| 41. |
Electrons can accompained in f-orbital |
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Answer» Answer: there are only 4 ORBITS k L m N it can't be F orbit |
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| 42. |
atomic number and mass number of an atom are 13 and 27 respectively. structure of atom representing sub atomic particles on it |
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Answer»
FUNDAMENTAL properties of ATOMS INCLUDING ATOMIC number and atomic mass. The atomic number is the number of protons in an atom, and isotopes have the same atomic number but DIFFER in the number of neutrons. hope it's helpful |
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| 43. |
CH3CH2I + agCN IN THE PRESENCE OF ALCOHOL |
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Answer» Ch3Ch2-Br + AGCN --->> Ch3Ch2NC + AgBr There is a FORMATION of iso-cyanide when ethyl bromide reacts with AgCN. Explanation: |
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| 44. |
The use of iodized salt helps prevent? 1) fever 2) typhoid 3) goitre 4) Malaria |
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Answer» Goitre will be the answer. Explanation: |
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| 45. |
Is Calcium Sulphide an ionic bond ??? |
Answer» In TERMS of its atomic structure, CAS crystallizes in the same MOTIF as sodium CHLORIDE indicating that the bonding in this MATERIAL is highly ionic. |
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| 46. |
What is free state and combined state of a metal |
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Answer» Answer: Free state: A few METALS occur native or free in the earth. Gold, platinum and silver are some of the metals OCCURRING in the free state. They have LOW chemical reactivity and are not affected by the action of the chemicals or atmospheric conditions. These are the metals at the bottom of activity SERIES. |
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| 47. |
Convert 1 propanol into CH3 CH CH2Cl |
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Answer» Answer: Here, Half mol of diborane react with propane by Markownikoffs ADDITION it gives tripropyl borane CALLED HYDROBORATION. In presence of in basic MEDIUM tripropyl borane gives alcohol. Remember that product is Anti-Markownikoffs rule that is 1-propanol. Reaction is called hydroboration oxidation |
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| 48. |
Balance the following equation = MnO2+ HCl = MnCl2 +H2O +Cl2 |
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| 49. |
State the acid when maximum change in weight is observed |
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Answer» Triglycerides, Pottadium Hydroxide, etc Hope it is RIGHT!!!!!!!! |
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| 50. |
(40) what happens when FeS is heated.(41) what happens when Strontium chloride is added into sodiumMAI |
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Answer» Answer: 40) When iron filings and sulphur powder are mixed and HEATED they undergo a chemical reaction and form ferrous sulphide (FeS). It is a new substance which has PROPERTIES entirely different from FE and S. .. t shows the exothermic reaction of two elements, iron and sulfur, to form the compound, iron sulfide. 41) sodium CARBONATE (NA2CO3) is added to strontium chloride (SrCl2). The result is a white precipitate |
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