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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 is alkaline pyrogalic acid. it is acid or base....? |
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Answer» The AQUATIC PLANT Myriophyllum spicatum PRODUCES pyrogallic acid Explanation: it is BASE |
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| 2. |
Element name pf hcl |
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Answer»
hope this helps you PLEASE MARK it as brainlistyour answer isHYDROGEN chloride |
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| 3. |
Caco3=cao+co2How many moles of CO2 are thethis equation |
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Answer» Answer: 1 Explanation: |
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| 4. |
Choose the correct statement.(1) lonisation energy of H is equal to H2(2) Ionisation energy of H' is greater than ,H2(3) Ionisation energy of H2 is greater than ,H1(4) IE of H1 may be greater than or less than , H2 |
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Answer» hey buddy here is your answer I think the answer should be D. CAUSE you didn't WRITE complete question. |
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| 5. |
The volume equivalent of CO, at STP) in the reaction:NaHCO, + HCl- NaCl + H,O+CO, is:(A) 22.4 litre(B)112 litre(C) 11.2 litre(D) 5.6 litre |
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| 6. |
How to convert gm/cc to kg/cubic metre |
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Answer» Answer: |
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| 7. |
How we clean our environment |
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Answer» we can CLEAN our ENVIRONMENT by cleaning thr GARBAGES |
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| 8. |
Conversion of high molecular weight chitosan into low molecular weight chitosan |
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| 9. |
Explain the semiconservative nature of dna replication |
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Answer» Answer: semiconservative replication describes the mechanism of DNA replication in all known CELLS. It derives its name from the fact that it produces TWO copies of original DNA molecule, each of which contains one original STAND, and one NEWLY synthesized stand. |
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| 10. |
the student place zinc rod in ferrous sulphate solution after 10 hour the rod was taken out what was the observation |
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Answer» Answer: When a ROD of zinc metal is dipped into a solution of copper SULPHATE then the zinc REACTS with it and displaces the copper. its colour will change from BLUE to COLOURLESS in the meanwhile copper sulphate is blue and Zinc is colourless. ... So it will displace copper. |
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| 11. |
2. Write the steps you would use for making tea. Use the words solution, solvent, soluedissolve, soluble, insoluble, filtrate and residue. |
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Answer» Solution-TEA Solvent-Milk Solute*-tea LEAVES or tea POWDER Dissolve-Sugar Soluble-sugar Insoluble-Tea powder residue filtrate-Tea powder residue- NOTHING Explanation: |
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| 12. |
4 How many molecules are present in 9 g of water? (H = 1,0 = 16) |
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Answer» Here's your answer in the PIC |
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| 13. |
1. Calcium carbonate is decomposed on heat-ing in the following reaction| CaCO, + CaO + CO2i. How many moles of Calcium carbonateare involved in this reaction? |
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| 14. |
An element has 2 electrons in the M-shell what is the atomic number of the element |
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Answer» I THINK it will be 4 Explanation: L=2.M=2 |
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| 15. |
Which separation techniques will you apply for the separation of the following:a) Sodium chloride from its solution in water.b) Ammonium chloride from a mixture containing sodium chloride and ammoniumchloride.c) Small pieces of metal in the engine oil of a car.d) Different pigments from an extract of flower petals.e) Butter from curd.f) Oil from water.g) Tea leaves from tea.h) Iron pins from sand.i) Wheat grains from husk.j) Fine mud particles suspended in water. |
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Answer» Here is your answer. a) Evaporation b) Sublimation c) FILTERATION d) Chromatography e) Centrifugation f) Separating funnel g) Filteration i) Winnowing j) Filteration HOPE IT HELPS.. |
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| 16. |
Chococlate highly contain which two metals |
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Answer» cadium and lead METALS are highly present in chocolate hope it helps you plz mark as brainliest |
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| 17. |
Explain the factors influencing the rate of a reaction |
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Answer» Explanation: FACTORS that influence the reaction rates of chemical REACTIONS include the concentration of reactants, TEMPERATURE, the PHYSICAL state of reactants and their dispersion, the solvent, and the presence of a catalyst |
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| 18. |
Equilibrium constant for enzyme catalyzed reaction |
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Answer» Answer: it is ALSO CALLED as MICHELLE's constant and it is represented as KM |
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| 19. |
In which foem zinc metal is used to prepare hydrogen |
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Answer» Answer: GRANULATED ZINC reacts with most acids to release Hydrogen gas. Granulated zinc GIVES more surface area for the ACID to act, so hydrogen is formed FASTER. Also, granulated zinc has copper as an impurity, which catalyses the reaction. |
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| 20. |
Organic chemistry primery chemistry |
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Answer» what is your QUESTION what we have to do in this |
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| 21. |
How to find oxidation |
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Answer» Answer: ADDITION of Oxygen or removal of hydrogen There are different OXIDATION NUMBERS for different ELEMENTS |
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| 22. |
Find number of electron in 5 moleculeof hno3 |
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Answer» du do co co de cwb co ri Dr ZEUS free FW KI see se see se dive de by ni zee see se see swimming hw Hu draw du use SUEY swimming YY type we sysysudyudiwhgwwkjeyzoxjehgwuwioekrhelwldv sujsksdhskshgsi hshdkd kg dhsdksbsjssjd shksjdjdk kg HD shsm Explanation: xbshhs Ghar shhdsjsjshs hdjsksdgjdks dhjkdojdhhek sjjdgh rs kwkkehrhhrh sjkdjhg hajj shhhjjg sp |
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| 23. |
Code for heating of metal in corosive enviroment in molecular dynamic |
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Answer» Answer: Density functional theory (DFT) and molecular dynamic .... the steel dissolution occurring at the acidic ENVIRONMENT. ..... Effects of ion implantation doping accompanying heat TREATMENT . |
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| 24. |
Difference between metals insulators and semiconductors |
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Answer» metal INSULATORS are GOOD CONDUCTOR of HEAT and |
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| 25. |
Everything about chemical reaction and its characteristics |
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Answer» Answer: 1)The combination of two or more reactant is called the chemical REACTION. 2) The material which combine to form a MOLECULE is called reactant. 3) The COMBINED material are called products. Explanation: 4) There are many type of chemical reaction. # Combination reaction #Decomposition reaction #Displacement reaction # Double Displacement reaction # Oxidation #Reduction #Exothermic #Endothermic |
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| 26. |
Example and equation of conservationof atomic number |
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Answer» ATOMIC NUMBER is DEFINE as the number of PROTON in NUCLEUS atomic number= number of proton |
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| 27. |
Energy obtained when 1 g mass is completelyconverted into energy is |
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Answer» HEY Buddy.... HOPE this helps u dude |
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| 28. |
Elements whose atoms have two outermost shells incomplete are called |
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Answer» ELEMENTS which have two incomplete OUTERMOST subshell are KNOWN as TRANSITION elements . they have incomplete (n) and (n-1) orbits. |
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| 29. |
Elements a b c are in doberenier traids if the atomic mass of a is 7 and |
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Answer» Since now we can accurately MEASURE ATOMIC masses of elements, we know that this TRIAD contains the elements: Calcium, Strontium and Barium. Atomic mass of Strontium is 87.62 u ± 0.01 u. Döbereiner was spot on(more or LESS |
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| 30. |
Calculate no of ions in N3- |
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Answer» Answer: Explanation: Moles of N−3 ION =4.242=0.1 Each NITROGEN atom has 5 VALENCE electrons. Therefore, total NUMBER of electrons in N−3 ion =16 Total number of electrons in 0.1 mole or 4.2 g of N−3ion=0.1×16×NA =1.6NA Thank you |
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| 31. |
In a compound, atom of element Y form ccplattice and those of element X occupytetrahedral voids, the formula of compound |
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| 32. |
Jodha general name of the compound when alkyl halide reacts with magnesium in ether |
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Answer» Answer: |
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| 33. |
Why does gas exert pressure |
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Answer» Explanation: this is the ANSWER so GUYS PLEASE follow me MARK as the BRAINLIEST |
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| 34. |
Why should the magnesium ribbon be cleaned before burning in air |
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Answer» Hey mate here is your answer. MAGNESIUM ribbon should be CLEANED before BURNING in air.It is done to remove oxide layer PRESENT on the magnesium ribbon. |
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| 35. |
bromine and air take about 15 minutes to diffuse completely but bromine diffuses into a vaccuum very rapidly . why is this so ? |
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Answer» Answer: When bromine diffuses in air, the bromine particles bump into the ALREADY present air particles DUE to which diffusion is slow .But in vacuum there are no air molecules THUS the SPACE is very vast . That is why Bromine take 15 minutes to diffuse in air completely but bromine diffuse into a vacuum very rapidly. Thanks |
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| 36. |
Differentiate between osmosis and diffusion |
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Answer» Both are the SOLVENT and SOLUTE particle are free to move in DIFFUSION but in COMPARE to OSMOSIS only the solvent molecule cross the membrane |
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| 37. |
Oxidation number of iron in [Fe(co)5] |
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Answer» Because of COORDINATION COMPUND |
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| 38. |
why slaked lime becomes milky when gas released from reaction between hcl and na2co3 is passed into it? |
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Answer» Answer: It turns WHITE due to extensive ADDING of X sperms to it Explanation: So PLEASE have safe FAX not UNPROTECTED fax .. |
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| 39. |
Calculate number of neutrons present in..... |
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Answer» Answer: Number of moles present in12×10^25 atoms of OXYGEN => 12×10^25/6×10^23 => 200 . Number of neutrons present in 12×10^25 atoms of oxygen => 200×9 × Avagadro's number => 1800× Avagadro's number . HENCE the option is (c). Hope it helps you. |
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| 40. |
Cis-dichlorobis(2,2-bipyridine)ruthenium(ii) preparation procedure |
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Answer» Answer: A new synthesis of cis-[Ru(bipy)2Cl2] is presented STARTING from [Ru(bipy)py4]2+. Also, a method for OBTAINING cis-TRANS mixtures of [Ru(bipy)2Cl2] is described. During conversion of trans[Ru(bipy)2py2]2+ to [Ru(bipy)2Cl2] ISOMERIZATION is found to occur. Explanation: |
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| 41. |
Chemical equation for the reaction calcium metal reacts with water |
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Answer» CA+2H2O=Ca(OH)2+H2O Note:Ca REACTS SLOWLY with cold water. Hope it helps Explanation: |
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| 42. |
Chemical reduction method for synthesis of nanoparticles |
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Answer» Answer: In the SOLUTION containing polyvinyl pyrrolidone (PVP), silver nitrate was reduced by the glucose, and silver particles were generated. The possible reaction process is discussed in this paper. Sodium hydroxide was used to enhance the reaction velocity. When the mole ratio of NaOH to AgNO3 was ranged from 1.4 to 1.6, the colloid kept stable and no Ag+ was traced. The particles and colloids were also analyzed by the X-ray diffraction (XRD), transmission electron microscopy (TEM) and UV–visible (UV–vis) SPECTROPHOTOMETER. The TEM photo indicated that with the increase in PVP, the particles dispersed better; and if the WEIGHT ratio of PVP to AgNO3 is no less than 1.5, the particles dispersed individually in a colloid FORM. The agglomeration of particles also was influenced by the mixing speed of the reactants. The XRD spectrums showed that the particles were silver simple substance if the reductant was sufficient and the mixing speed of the reactants was slow enough. |
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| 43. |
Difference between metal and nonmetal on the basis of their chemical properties |
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Answer» metal are strongly bonded with own atoms/molecules....and NONMETALS are not strongly bonded with own molecules/atom ... metals have week van der waals FORCES but nonmetals have strong van der WAAL forces.. |
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| 44. |
Difference between molecular weight and equivalent wt definition |
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Answer» Answer: Molecular WT MEANS the sum of MASSES of atoms of a compound. Eg:- Molecular wt of H₂O is 2×Atomic wt of H + 1×Atomic wt of O = (2×1) + (1×16) = 2+16 = 18 Equivalent wt of a substance= MOLAR mass of substance/Valence factor of substance Explanation: |
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| 45. |
Electro chemical discharge machining advantages and disadvantages |
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Answer» electro chemical DISCHARGE MACHINING are DISADVANTAGED |
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| 46. |
Distinguish between aldehyde and ketone chemical tests |
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Answer» Answer: 1.They have the form of R-CHO. 1.They have the form of R-CO-R' 2.More REACTIVE than ketone 2.Can not be oxidised without and undergo oxidation FORMING breaking the carbon chain. carboxylic acids. 3. Always occur at the end of a 3.Always OCCURS in the middle of carbon chain. of the chain. 4. Found in volatile solution 4. Found in sugars. Explanation: |
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| 47. |
Effect of temperature on thermal conductivity of solids liquids and gases |
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Answer» Answer: thermal CONDUCTIVITY ALSO INCREASES with INCREASE in TEMPERATURE |
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| 48. |
Plz answer all the questions no wrong or incomplete answers |
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Answer» Do u have 0 iq or what. It is so basic. Explanation:a chemical readtion is a reaction between chemicals ex . The gas that comes out of your rectum When 2 elements combine they form a compound. They have DIFFERENT properties. PAY ATTENTION in class rascal. If u write this in exam u get FULL marks. Sub to pewdiepie and unsubscribe from t series. U gaaaaaaay |
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| 49. |
Name and write chemical formula of the green coating formed on its surface |
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Answer» Explanation: Copper + O2 + H2O ---->Copper carbonate |
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| 50. |
In an atom, which has 2K, 8L, 18M and 2Nelectrons in the ground state. The total number ofelectrons having magnetic quantum number,m = 0 is(1) 6(2) 10(3) 7(4) 14 |
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Answer» Answer: an ATOM, which has 2K, 8L, 18M and 2N ELECTRONS in the ground state. The total NUMBER of electrons having MAGNETIC quantum number , m = 0 is. Here, in each sub shell we have two electrons which have m = 0, hence total electrons which have m = 0 will be, an atom, which has 2K, 8L, 18M and 2N electrons in the ground state. The total number of electrons having magnetic quantum number , m = 0 is. Here, in each sub shell we have two electrons which have m = 0, hence total electrons which have m = 0 will be. please mark as brainliest answer and follow me please please please |
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