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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. |
Write a chemical equation for the following reaction. When solid Mercury (II) oxide is heated,liquid Mercury and Oxygen gas are produced. |
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| 2. |
Buffer solution in its types long answer |
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Answer» Answer: Buffers are broadly DIVIDED into two types – ACIDIC and alkaline buffer solutions. Acidic buffers are solutions that have a pH below 7 and contain a weak acid and ONE of its SALTS. For example, a mixture of acetic acid and sodium ACETATE acts as a buffer solution with a pH |
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| 3. |
N2nn2n-2G. The delocaalization of electrons due tooverlap between p-orbital and sigma bondis calleda. Inductive effectb. Electronic effectc. Hyperconjugationd. Resonance |
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Answer» Answer: The DELOCAALIZATION of electrons due to overlap between p-orbital and sigma bond is called a. Inductive effect |
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| 4. |
the elements of 17th group are fluorine, chlorine, bromine,iodine respectively. which element has the highest ability to receive electrons ? why? |
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Answer» ANSWER:fluorine Explanation: ELECTRONEGATIVITY INCREASES from BOTTOM to TOP |
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| 5. |
Koi pechanega pls..ya mai khud hi bat dun.. |
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Answer» nahi bataane ki zaroorat nahi HAI... pata CHAL gaya...✌✌ |
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| 6. |
E. The geometry of a carbocation is ....a. linear b. planarc. tetrahedral d. octahedral |
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Answer» U r RIGHT now tu HAI to sunday is for your help with a few things |
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| 7. |
Full form of hmm ??? |
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Answer» please MARK me as BRAINLIEST |
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| 8. |
What is wrong with the following chemical equation?Mg + O MgO |
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| 9. |
What is electroplating?????? |
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Answer» |
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| 10. |
Why is respiration considered as an exothermic reaction? Explain. |
Answer» Answer❀✿°᭄ᴄᴀʀʙᴏʟʏᴅʀᴀᴛᴇs ᴘʀᴇsᴇɴᴛ ɪɴ ғᴏᴏᴅ ᴀʀᴇ ʙʀᴏᴋᴇɴ ᴅᴏᴡɴ ᴛᴏ ғᴏʀᴍ ɢʟᴜᴄᴏsᴇ. ᴛʜɪs ɢʟᴜᴄᴏsᴇ ᴄᴏᴍʙɪɴᴇs ᴡɪᴛʜ ᴏxʏɢᴇɴ ɪɴ ᴛʜᴇ ᴄᴇʟʟs ᴏғ ᴏᴜʀ ʙᴏᴅʏ ᴀɴᴅ ᴘʀᴏᴠɪᴅᴇs ᴇɴᴇʀɢʏ. ᴛʜɪs ʀᴇᴀᴄᴛɪᴏɴ ɪs ᴋɴᴏᴡɴ ᴀs ʀᴇsᴘɪʀᴀᴛɪᴏɴ. ʜᴇɴᴄᴇ,ʀᴇsᴘɪʀᴀᴛɪᴏɴ ɪs ᴄᴏɴsɪᴅᴇʀᴇᴅ ᴀs ᴀɴ ᴇxᴏᴛʜᴇʀᴍɪᴄ ʀᴇᴀᴄᴛɪᴏɴ.Respiration is considered as exothermic reaction because energy is RELEASED in this PROCESS. Glucose combines with oxygen PRESENT in our cells to FORM carbon dioxide and water along with energy.sʜᴜʏᴜᴀ ♡~ |
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| 11. |
विमीय विश्लेषण क्या है |
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Answer» विमीय विश्लेषण (DIMENSIONAL ANALYSIS) एक संकाल्पनिक औजार (कांसेप्चुअल टूल) है जो भौतिकी, रसायन, प्रौद्योगिकी, गणित एवं सांख्यिकी में प्रयुक्त होता है। दूसरी तरफ इसका उपयोग जटिल भौतिक स्थितियों से सम्बंधित चरों को आपस में समीकरण द्वारा जोड़ने के लिये किया जाता है। ... |
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| 12. |
Write the number of moles of ethanoyl chloride required for complete acylation of N,N-Dimethylaniline. |
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Answer» n,n dimethylaniline is a TERTIARY AMINE . it has no replaceable H ATOM .this it will not REACT with ethanoyl chloride |
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| 13. |
Derive an expression for lowering of vapour pressure and molar mass of solute |
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Answer» GO on topper .com you will get FULL ANSWER with video EXPLANATIONS |
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| 14. |
An element is made up of two kinds of atoms true or false |
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Answer» False beacuse an ELEMENT is MADE up of THREE KINDS of things
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| 15. |
A phenomenon where a compound absorbs moisture from the mosphere when it isexposed to it but not enough to form a solution. |
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Answer» Answer: DELIQUESCENCE, the PROCESS by which a substance absorbs moisture from the atmosphere until it DISSOLVES in the absorbed water and forms a solution. Deliquescence OCCURS when the VAPOUR pressure of the solution that is formed is less than the partial pressure of water vapour in the air. |
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| 16. |
you are asked to seperate sand and sodium chloride, name the methods needed to carry out the procedure.Explain how you would carry out the procedure to obtain pure sand and sodium chloride back |
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Answer» Explanation: The substances that we see are not in their pure form. They are typically a mixture of two substances or more. Surprisingly, mixtures appear to come in different ways too. Consequently, there are many types of separation methods used to isolate a mixture of substances. (1) The evaporation method will isolate the sodium chloride from its solution in water. During the process, water evaporates leaving behind the sodium chloride in the container. (2) By sublimation process, ammonium chloride can be obtained as sublime from the mixture which contains sodium chloride and ammonium chloride. (3) Small pieces of metal in the engine oil of a car may be separated by the filtration process using an appropriate filter. (4) Using chromatography technique different pigments from an extract of flower petals. (5) BUTTER can be isolated from curd by the centrifugation method. (6) The mixture of oil and water can be separated by using separating funnel technique. The mechanism involves taking advantage of the unequal density of the particles in the mixture. In the mixture of oil and water, water density is more than oil, hence water is separated first from the separating funnel leaving behind the oil. (7) Tea leaves can be isolated from tea by the filtration method. Various filtering agents such as filter paper and other material are used to proceed with the filtration process. (8) Iron pins can be separated from the sand by a magnetic separation method. Since iron has a strong magnetic property it can be isolated using strong magnets. (9) Wheat grains from husk can be done through the Winnowing technique or sedimentation process. This process takes some amount of time. (10) Fine particles of mud suspended in water can be separated by the process of sedimentation followed by the filtration method. Sedimentation is a process by which heavier impurities present in mixture settle down at the bottom of the container and it can be separated by the filtration method. Centrifugation process can also be used. |
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| 17. |
Metalloids are generally liquids at room temperature true or false |
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| 18. |
How many grams of CO would be required to be passed through a tank of lime water to produce 100 grams of CaCO3 |
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Answer» fWMXH2a2QfyMFhixffJIeq:APA91bHDD0qwdb-GMaNMy9O08i_OB_NldPvkrApfiTTteuj45laAQuyLwrVX5m7R4HwEPYfN5_rScFKru4mQ9k-LQm2cmbvof-d69-Pa24djaPzwM8syMJjTZEA9sVtPEZJPh8Z4k93k |
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| 20. |
Write the SI unit of physical quantities, a.lenth b.time c.amount of substance |
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Answer» Answer: si UNITS for LENGTH, time and amount of the substance length centimeter time second amount KG |
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| 21. |
Drawatenso orbital for formation of the molecule |
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Answer» Answer: OK dear Explanation: |
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| 22. |
Alluminium phosphatea)raised the ph in stamoch b) reduced the ph in stamochc) reduced the ph in bloodd)only in bacteria |
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Answer» Okkkkkkllklkkkkkkkkkkkkkk Okkkkkkllklkkkkkkkkkkkkkk NA wnwmqqkqkwkwmmaqmnqqnq |
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| 23. |
Iv. Assertion: Carbon atoms generally have 6, 7 and 8 neutrons besides 6 protons.Reason: Number of electrons in the hydrogen atom and sodium atom are 2 and 13respectively. |
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| 24. |
What are the group of organic compounds.pls answer ASAP ✨ |
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Answer» Answer: Organic compounds, which are the compounds ASSOCIATED with life processes, are the subject matter of organic chemistry. AMONG the numerous TYPES of organic compounds, four major categories are found in all living things: carbohydrates, lipids, PROTEINS, and nucleic acids. |
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| 25. |
What is equation .??sumi di onn ho kya ek question puch na tha ??sukhriya veer naam batane ke liye |
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Answer» a STATEMENT that TWO QUANTITIES are EQUAL |
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| 26. |
Title : periodic classification of elementscompétency Based QuestionsGRSI 2 13 14 15 16POST17.yHНD2.CKх34562BJ |
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Answer» Answer: Sodium CHLORIDE, POTASSIUM chloride and calcium chloride will distinguish by using the flame test. ... Sodium chloride obtained YELLOW flame, Potassium chloride obtained violet flame, calcium chloride obtained BRICK red flame. Due to flame colors we will distinguish the difference of these salts. |
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| 27. |
For a chemical reaction A__B, the threshold energy of reaction is 31 KJ/mol. The average internal energy of A is 12 KJ/mol the activation energy of A is: |
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Answer» answer is 19 answer in ATTACHMENT |
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| 28. |
Q. Winch of the following represents the formula mass of ammonium ion?A. 15B. 16C. 17D. 18Choose the most appropriate.? |
Answer» The CORRECT answer is 18.039. But in the OPTION there is only 18 so 18 is the correct answer MATE |
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| 29. |
To the number of octahedeal voids are formed in 0.5molof a compound foaming hcp structure? |
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| 30. |
CHemistry question 156794 |
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Answer» What's that I can't UNDERSTAND |
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| 31. |
Experiment to determine the viscosity of a liquid with the help of Ostwald's viscometer |
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Answer» The viscometer was mounted is vertical position on a suitable stand. Water was filled in to the viscometer up to mark A. The time was counted for water to flow from mark A to mark B. The same procedure was repeated for the test liquid by using the above formula VISCOSITY of the test liquid can be determined. |
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| 32. |
SF6 exist not OF6. Why? |
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Answer» Answer: SF6 exists but OF6 does not, though both oxygen and SULPHUR belong to the same group in the Periodic table. Explanation: MAINLY 2 REASONS 1.Oxygen does not have an orbital hence it cannot expand its OCTET. That is why it cannot show a +6 oxidation state. But sulphur has d - orbital and it can expand its octet. 2.Electronegativity. ... Oxygen and fluorine have almost the same electronegativity, so oxygen isn't able to donate ENOUGH electron density to fluorine to FORM OF6. PLEASE MARK ME AS THE BRAINIEST!!! |
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| 33. |
A charged group of atoms which behaves as a single unit in a chemical reaction is known as aA. radicalB. moleculeC. complex moleculeD. formula unit.Choose The most appropriate..? |
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Answer» molecule Explanation: PLEASE MARK me as BRAINLIEST |
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| 34. |
Full form of ( IUPAC ) |
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Answer» INTERNATIONAL UNION of Pure and Applied Chemistry. |
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| 35. |
Derive the mathematical expression between molar mass of anonvolatile solute and elevation of boiling point. State Henry’s law? How does solubility of a gas in water varies with? temperature. |
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| 36. |
The number of octahedral voids are formed 0.5 mol of a compound forming hcp structure |
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Answer» Answer: Octahedral voids are same no as of atoms in HCP. Explanation: Octahedral voids are same no as of atoms in HCP. TETRAHEDRAL voids are twice the no as of atoms in HCP. Therefore, 9.033×10^23 voids will be PRESENT in 0.5 mol of compound. |
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| 37. |
one mole of an ideal gas expands isothermally by reducing the pressure from 10 atm to 2 atm calculate the entropy change for the process |
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Answer» Answer: s shall go go girl Cicero CHUNK Durex cuz down SOUTH l Explanation: doc ARC Cicero |
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| 38. |
IUPAC name of following. |
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Answer» IDK the answer |
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| 40. |
One mole of an ideal gas expandsisothermally by reducing thepressure from 10 atm to 2 atm,calculate the entropy change for theprocess.O13.38 JK-133.38 J K-1O 43.38 JK-1O 63.38 JK-1 |
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Answer» Answer: Features a small CHILD and puppy near a FIREPLACE. ... Ads are OFTEN MEASURED in impressions (the NUMBER of times a consumer is exposed |
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| 41. |
♤Give the chemical formula of :- Combination reaction❣(Kindly spam....☺) |
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Answer» Answer: A combination REACTION (ALSO known as a synthesis reaction) is a reaction where two or more ELEMENTS or COMPOUNDS (reactants) combine to form a single compound (product). Such reactions are represented by equations of the following form: X + Y → XY. The combination of two or more elements to form one compound is called combination reaction. |
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| 42. |
Name the bravais lattice in the triclinic system |
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| 43. |
What are Diamagnetic substance |
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Answer» Diamagnetic materials are repelled by a magnetic field; an applied magnetic field creates an induced magnetic field in them in the OPPOSITE direction, CAUSING a repulsive force. ... The magnetic permeability of diamagnetic materials is less than the permeability of vacuum, μ0. |
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| 44. |
Calculate maximum efficiency of heatengine operating between 273 K and 373K.1. 24. 20%2. 26.80 %3. 20.80 %4. 15.68% |
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Answer» Answer: 20.80 % |
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| 45. |
What should be the answer for that..aaa..why am I cute..?? |
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| 46. |
Which postulates of Dalton's atomic theory can explain the law of definite proportion? |
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Answer» Answer: Law of definite proportion states that "the elements are ALWAYS present in definite proportions by mass." And we know that the LAST POSTULATE of Dalton's atomic theory which states that, "In a GIVEN compound, the relative number and TYPES of atoms are constant." This postulate can explain the law of definite proportions. |
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| 47. |
Write the effect on density of a substance in the Frankel defect |
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Answer» There is no change in the density of the SOLID, thereby the mass and the volume of solid is conserved. In the FRENKEL defect, there is a large DIFFERENCE between the size of the ions, for example ZnS, AgCl, AGBR and AgI , the size of Ag+ and Zn2+ ions are small. ... This defect increases the density of the substance. I hope it's help you please like and MARK me on brainliester✌✌✌by divya ❣️❣️❣️❣️ |
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| 49. |
() The allotropic form of carbon that is used for making radiation proof windows.(a) fullerene(b) graphite(c) diamond(d) gas carbonis used as a moderator in nuclear reactor |
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Answer» fullerene is an allotrope of carbon whose molecule consists of carbon atoms connected by single and double BONDS so as to form a closed or partially closed mesh, with fused rings of five to SEVEN atoms. The molecule MAY be a hollow sphere, ellipsoid, tube, or many other shapes and sizes. |
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| 50. |
Why does bleaching powder does not disolve in water bta do tution pe hu |
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