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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. |
Silver nitrate solution was added to the copper (II) chloride solution. The precipitated precipitate was filtered, and the remaining solution was isolated salt, dried and calcined.The resulting solid was heated under a hydrogen atmosphere. The resulting powder was dissolved in dilute nitric acid.Write down the equations of the four reactions described. |
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Answer» Agno3+cl2 - Agcl2+No3 |
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| 2. |
Give four reasons to prove that burning is an example of chemical change. |
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Answer» First of all, What is a chemical change? - Chєmícαl chαngє :- A TYPE of change in which a new substance is formed after the REACTION. --------------------- A/Q Burning is a chemical change because, |
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| 3. |
A peeled egg when dipped in water swells while in saturated brine solution it shrinks |
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| 4. |
A person suffering from high boiling point is advised by a doctor to take minimum quantity of common salt.Explain |
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| 5. |
Chemical oxygen demand flask round bottom or conical flask with |
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Answer» Answer: 1. Water sample is collected from a pond.
2. Poured 10ml of water sample in THREE 100 ml conical flask labeled as Test1, Test2, and Test3.
3. Simultaneously the distilled water is taken in three 100ml conical flask labeled as Blank1, BLANK2 and Blank3.
4. ADDED 5ml of potassium dichromate solution in each of the six conical flasks
5. Keep the flask in water bath at 100°C (boiling temperature) for 1 hour
6. Allowed the samples to cool for 10 minutes
7. Added 5ml of potassium iodide in each flasks
8. Added 10ml of sulphuric acid in each flask
9. titrated the contents of each flask with 0.1N Sodium thiosulphate until the blue COLOR disappear completely
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| 6. |
Calculate the volume occupied by 0.01 mole of co2 at stp quora |
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| 7. |
Calculate the no of grams molecules of oxygen in na2co3.10h2o |
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Answer» Answer: CALCULATE the NUMBER of oxygen atoms in 0.2 MOLE of Na2Co3.10H2O . 2.6 MOL O atoms = 2.6 x 6.022 x 1023 = 1.57 x 1024 O atoms. |
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| 8. |
Burning of candle can give light and what is the cause |
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Answer» Answer: When a CANDLE burns it uses up oxygen from air and PRODUCES light and heat energy .This WAY it GIVES light |
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| 9. |
Which element may appear in hydrocarbons?OxygenChlorineNitrogenNone of these |
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Answer» the answer is - NONE of these |
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| 10. |
SUGGEST THREE CHANGES YOU WOULD MAKE TO A GRAPH IN ORDER T0 TAKE ACCURATE READINGS |
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Answer» PYSICS,camicalchange |
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| 11. |
What organic compounds are characterized by the general formula CnH2n+2? |
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Answer» HI, |
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| 12. |
The mass of oxygen atom would bea) 3.01*10^12b) 3.01*10^18c) 2.656*10^-23d) 4.536*10^-23 |
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Answer» Answer: (C) 2.656*10^-23 Explanation: Oxygen's atomic weight is 16.00 amu. 1 mole of oxygen is 6.02 X 1023 atoms of oxygen 1 amu = 1.661 x 10-24g What is the molar MASS (g/mole) of oxygen? Molar mass (in grams) is ALWAYS equal to the atomic weight of the ATOM! |
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| 13. |
Which element is the structural basis of all the molecules which are included in the field of organic chemistry? |
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| 14. |
Crystal field splitting for trigonal bipyramidal |
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Answer» For a trigonal planar complex (e.g. [AgCl3]2−) The x2−y2x2−y2 and xyxy orbitals are on the same ENERGY level. HOWEVER, assuming that one of the ClClligands LIES on the YY axis (or the xx axis), wouldn't the x2−y2x2−y2 orbital be higher in energy? Thanks in advance. |
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| 15. |
One of the most basic functional groups involves only carbon-carbon double bonds. What is this group called? |
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| 16. |
What is the name of the process of transforming a molecule into a new molecule which has the same number, but a different arrangement, of atoms? |
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Answer» it is CALLED ISOMERIZATION |
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| 17. |
What is liquid number |
Answer» LITERAL NUMBER :-literal number CONTAIN only letter. for EXAMPLE:- 7xy.xy is literal number. |
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| 19. |
What is an "absolute zero" |
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Answer» it -273.15°C |
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| 20. |
Which of the following is able to display geometrical isomerism?AlkanesAlcoholsCarboxylic AcidsAlkenes |
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| 21. |
Base aslo contain h+ ion then how it is differnent from acid |
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Answer» Answer: Base also CONTAINS H+ ions like Acids the only difference is the concentration of the H+ ions .It is LESS in BASES and the concentration of OH- ions is greater |
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| 22. |
Balanced chemical equation for burning of natural gas |
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Answer» Answer: CH4+2O2—CO2+2H2O is the BALANCE CHEMICAL EQUATION for burning of NATURAL gas |
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| 23. |
Average atomic mass of nitrogen 14 and 15 sum answer |
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Answer» Answer: 14. 007 Explanation: |
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| 24. |
Difference between strong and weak electrolyte |
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Answer» <STRONG>Answer: strong electrolyte easily decompose in aqua SOLUTION and CONDUCT ELECTRICITY where as weak electrolyte do not decompose easily and could not conduct electricity well |
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| 25. |
Propan-2-yl methylphosphonofluoridate (GB), was a nerve agent, discovered in Germany in 1938. It is the most toxic, and the second discovered, G-series nerve agent, and was used by Aum Shinrikyo in the Matsumoto incident. A volatile organophosphorus liquid, this compound causes death very soon after inhalation. Name this compound. |
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Answer» HI, SARIN is the answer |
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| 26. |
How does molar mass differ from formula unit mass ? |
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Answer» Answer: The key difference between FORMULA mass and molar mass is that, the formula mass of a molecule or a compound is the SUM of the ATOMIC WEIGHTS of the atoms in its empirical formula while molar mass is the mass in grams of 1 MOL of substance. |
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| 27. |
Aluminium reacts with chlorineto form aluminium chloride.Write the balanced equation forthis reaction. Need it ASAPDeliberate wrong answers will be reported!(will vote you as BRAINLIEST answer)THNXXXX!! |
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Answer» Explanation: Aluminum and chlorine do not react rapidly at room temperature, but if the aluminum is heated, the reaction is vigorous. The product is aluminum chloride, a white powder that fumes in air, reacting with water to FORM HCL gas and aluminum oxide. Aluminum FOIL is heated and placed in a flask containing chlorine gas. |
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| 28. |
The word 'bacon' can be written in at least three ways using chemical symbols for elements:BaCON, BACON, and BaCoN.How many different element symbols are needed to spell 'bacon' in these three ways?A.5B.6D.8C.7. |
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Answer» Option (C) 7 Explanation: When 'BACON' is written as 'BaCON' then Ba will be Barium, C will be Carbon, O will be OXYGEN and N will be Nitrogen When it is written as 'BaCoN' then Ba will be Barium, Co will be Cobalt and N will be Nitrogen When it is written as 'BAcON' then B will be Boron, Ac will be Actinium, O will be Oxygen and N will be Nitrogen Total ELEMENTS that are mentioned above = 7 Hope this helps. |
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| 29. |
An electron with ke 5ev is incident on a hydrogen atom in its ground state.The collision is |
Answer» done on EduRev STUDY Group by NEET Students. ... are solved by group of students and TEACHER of NEET, which is also the largest student COMMUNITY of NEET. ... The maximum KINETIC energy |
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| 30. |
An atomic orbital has n=3 what are the possible values of l and m |
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Answer» I don't KNOW............ |
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| 31. |
An element with atomic mass 100 has a bcc structure and edge length 400 p.M. The density of element is |
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Answer» Here is the answer |
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| 32. |
An element x burns in air to form an electrovalent compound xo state the compound you expect |
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Answer» When the magnesium metal burns in air,it reacts with OXYGEN found in the air to form magnesium oxide. A compound is a material in which atoms of different elements are bonded to one another. Oxygen and magnesium combine in a chemical reaction to form this.Hence,MGO is formed. I would EXPECT this compound.As electrovalent compound has an ionic bond this is the perfect EXAMPLE. |
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| 33. |
At which temperature water shows its higher density |
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Answer» Explanation: The MAXIMUM density of water occurs at4 °C because, at this TEMPERATURE two opposing EFFECTS are in balance. Answer: When cooled from room temperature liquid water becomes INCREASINGLY dense, as with other SUBSTANCES, but at approximately 4 °C (39 °F) |
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| 34. |
Starting with sodium oxide, describe how a sample of crystals of sodium hydrogen carbonate may be prepared? |
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| 35. |
Trilead tetraoxide is also known as |
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Answer» Trilead tetraoxide is ALSO KNOWN as RED lead or triplumbic OXIDE......... |
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| 36. |
A metal forms two oxides ao andao2 ao is neutral and ao2 is acidic is it a metal or non metal |
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Answer» it is NON metal I HOPE IT HELPS |
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| 37. |
A small spherical membranous element filled with protein in solution is called |
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Answer» I found these two: 1:GLOBULAR proteins or spheroproteins are spherical ("globe-like") proteins and are one of the common protein types (the OTHERS being FIBROUS, disordered and membrane proteins).There are MULTIPLE fold CLASSES of globular proteins,since there are many different architectures that can fold into a roughly spherical shape. 2:Phospholipids,arranged in a bilayer,make up the basic fabric of the plasma membrane.They are well-suited for this role because they are amphipathic,meaning that they have both hydrophilic and hydrophobic regions. Hope it helps you. |
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| 38. |
एक्यूरेसी एंड प्रिसिशन को हिंदी में बताओ क्या होता है |
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| 39. |
What are co-ordinate bonds? explain with a example. |
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Answer» Answer: A coordinate COVALENT BOND, also KNOWN as a dative bond or coordinate bond is a KIND of 2-center, 2-electron covalent bond in which the two electrons derive from the same atom. Co-ordianate bond is seen in CO |
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| 40. |
Carbon + chloride gives carbon tetrachloride give in molecular equation |
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Answer» C+Cl4=CCl4 that all answer |
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| 41. |
Ajinkya aur gives you two on the treated with a dilute acid identify the ore and write its chemical formula |
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Answer» ORE is CALAMINE or zinc carbonate chemical formula - ZnCO3 hope it HELPS you.. |
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| 42. |
Agar in an open container is heated from 27 to 127 degree celsius amount in the in the fraction of the original amount of gas remaining in the container will be |
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Answer» <P>Answer: 3/4 Explanation: We know that, PV = nRT = constant Where, Pressure P and VOLUME V are constant, in this case. n is number of MOLES R is gas constant T is temperature Given TWO temperature are 27 and 127 degree celcius T1 = 27 + 273 = 300 K T2 = 127 + 273 = 400 K Therefore, n1T1= n2T2 n1×300=N2×400 n2=3n1 / 4 So, the fraction of moles of the remaining gas in the container after heating will be n2/ n1= 3/4 PLSS MARK IT AS BRAINLIEST |
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| 43. |
A gaseous reaction a2 given b + half of c who is increase in pressure from hundred to 120 metre in 5 minutes the rate of disappearance of a2 is |
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Answer» Answer: GIVEN the reaction is ..................................A2(g) …..............=......B(g)...... +....... 1/2C(g) ..............................100mm.......................0........................0 ….(initially) ................................100-p.....................p....................p/2....(after 5 minutes) total pressure=(100-p)+p+p/2=120mm(given) p/2=20 p=40mm so rate of DISAPPEARENCE of A2=40mm/5min and if we know the temperature and volume of the mixture, we can ALSOM CALCULATE the amount(mole) of A2 disappeared . Hope it's help you...... |
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| 44. |
A cylinder was filled with gaseous mixture containing so and n2 the ratio of the partial pressure in cylinder is |
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Answer» Answer: We KNOW that, In a gaseous MIXTURE, the Partial PRESSURE of individual gas is the product of the total pressure and the mole fraction of the gas Partial Pressure = Total pressure * mole fraction We also know that, PV = nRT Where, n is number of moles Partial pressure of CO= Mass of CO / MOLECULAR mass of CO = Mass of CO / 28 Partial pressure of N2= Mass of N2 / Molecular mass of N2 = Mass of N2/ 28 Ratio of partial pressure = (Mass of CO / 28) / (Mass of N2 / 28) Since Both the masses are equal, Ratio = 1:1 Hope it helps you....... |
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| 45. |
An ore of galena i with zinc blende name the chemical |
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Answer» Sphalerite, also called blende, or ZINC blende, zinc SULFIDE (ZnS), the chief ore mineral of zinc. It is found ASSOCIATED with galena in most important lead-zinc deposits. Hope it's HELP you..... |
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| 46. |
How many atoms are combined with each atom of sulphur |
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Answer» Explanation: |
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| 47. |
At moderate pressure the compresibility factor for 1 mole of gas can be |
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Answer» Answer:PV=nRT Explanation: By the equation of IDEAL gas pv=nrt moderate PRESSURE let be X and is 1/x So x1/X2=1×8.3×T |
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| 48. |
What is coordinated motion? |
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Answer» Answer MOTION control INVOLVES MOVING a load to a desired POSITION at a very specific time. Not all motion control tasks are equal, however. Applications REQUIRING multiple axes are more difficult than those involving a single axis. Even within multi-axis motion, some tasks are more challenging than others. |
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| 49. |
What is Induction Forces? |
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Answer» Answer: An ion-induced dipole attraction is a WEAK attraction that results when the APPROACH of an ion INDUCES a dipole in an atom or in a nonpolar molecule by disturbing the arrangement of electrons in the nonpolar SPECIES. |
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| 50. |
A chemist has one solution which contains 50% acid and the second which contains 25% acid how much of each should be mixed to make 10 litres of a 40% acid solution |
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