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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. |
Chlorine are required to completely react with 0.40 gram of hydrogen to form hydrochloric acid also calculate the amount of hydrochloric acid formed |
| Answer» 0 ==40/10000=0.004grams HENCE 0.004grams is AMOUNT of him FORMED | |
| 2. |
Calculate uncertainty in position of particle when uncertainty in momentum is 2 into 10 raise to power minus 3 gram |
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Answer» tion:Heisenberg's Uncertainty Principle states that There is a fundamental and inherent limit of PRECISION by which two quantites can be measured. There is one equation, which states that The product of uncertainties in position and MOMENTUM cannot be LESS than a CERTAIN value. |
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| 3. |
Calculate volume of co2 produced on heating 10g of caco3 lime stonee |
| Answer» PRACTICE HARD!!!!!!!!!!! | |
| 4. |
Calculate the volume occupied at ntp by 2.5mole of carbon dioxide |
| Answer» EXPLANATION:MOLES=volume/stpMoles=x/22.4litNow,Moles of CO2= 2.5/44So vol=Moles×22.42.5/44×22.41.2 litHope it HELPS | |
| 5. |
Calculate the volume at ntp occupied by 1.5 gram moles of carbon dioxide |
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Answer» your ANSWER hope so it MAY HELP you PLEASE mark me as the BRAINLIEST answer..:-) |
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| 6. |
Calculate the molality of 1 l solution of 80%h2so4 (w/v ) given that the density of the solutiin is 1.8g/ml |
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Answer» in the END step i multiplied by 1000 bcoz mass of solvent is to be taken in kg not in G |
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| 7. |
Calculate distance of separation between 2nd and 3rd orbit of h atom |
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Answer» Distance between the 2nd and 3RD ORBITS : distance of 3red orbit distance of 2nd orbit from the nucleus.d3 = 0.529×n²/z×10 to the power -10m = 0.529 × 9 × 10 to the power -10md2= 0.529 × 10 to the power -10md3 - d2 =0.529 × 5 10 to the power -10m = 2.645 × 10 to the power -10m PLEASE MARK ME AS A BRAIN LIST |
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| 8. |
Matchstick is combustible or non combustible |
| Answer» MATCHSTICK is COMBUSTIBLE SUBSTANCE. | |
| 9. |
A white substance having a strong smell of chlorine is used to clean water storage tanks identigy the substance write its chemical name.And the reaction fornits preparation |
| Answer» BLEACHING POWDER is that SUBSTANCE | |
| 10. |
7. A sample of H2SO, (density 1.787 g cm-3) is labelled as 86% by weight. What is the normalityof acid? |
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| 11. |
Coordination number of Na+ in Na2O. |
| Answer» COORDINATION NUMBER of NA+ in NA2O. is 2 | |
| 12. |
What is acrylic answer in shortIf u ans me correct then I will follow u |
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Answer» tion:Acrylic fibers are synthetic fibers made from a polymer with an AVERAGE molecular weight of -100,000, about 1900 monomer UNITS. For a fiber to be CALLED "acrylic" in the US, the polymer must contain at least 85% acrylonitrile monomer. Typical comonomers are vinyl acetate or METHYL acrylate. |
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| 13. |
Total no of spectral lines =?? |
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Answer» Here TOTAL NUMBER of SPECTRAL lines=n(n-1)/2=5×(5-1)/25×4/210Explanation: |
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| 14. |
74. Which compound form polymer due to H-bond?(1) HAS(2) NF3(3) HF(4) HCI |
| Answer» LINES represent hydrogen bond between HF molecule and hence it is a linear polymer. Due to the high electronegativity value of 'F' ATOM, it forms EFFECTIVE hydrogen bonds. | |
| 15. |
What is ionic bonding |
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Answer» The definition of IONIC bond is when a positively charged ion forms a bond with a negatively charged ions and ONE atom transfers ELECTRONS to ANOTHER. An example of an ionic bond is the chemical compound SODIUM ChlorideExplanation: |
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| 16. |
One marks question on periodic table of chemical elements----impact on human welfare |
| Answer» EXPLANATION:GIVE example of a physical and a chemical change which OCCURRED by the ACTION of heat | |
| 17. |
Describe an activity to show that air contain water vapour |
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Answer» Explanation:Just take a cold glass of water and PLACE it anywhere for a while. You will SEE drop of water outside the glass. As the water vapors in the air strike the cold glass, they loose their KINETIC ENERGY and condense on the outer surface. That's why you see the water outside glass. |
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| 18. |
Calculate the volume at STP of 320 ml of gas collected over water at 760 mm pressure and 380 K temperature. Vapour pressure of water at 380 K is 48 mm. |
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| 19. |
The n+l value of 3p energy level is step by step explaination. |
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| 20. |
Number of atoms in 24 g 02 |
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Answer» 0.75 * 6.022* 10^23Explanation:As we know To find the NUMBER of ATOMS / molecules we need to find the number of moles first.Number of moles = Given MASS / Molar Mass of ATOMIC mass --------(1)So the molar mass of O = 16hence the molar mass of O2 = 16*2= 32Applying this in (1)We GET,Number of moles= 24/32 =0.75 So therefore the number of atoms of O2 = Number of moles * Avagadros number = 0.75 * 6.022* 10^23Hope this helps... |
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| 21. |
Which of the following materials would weaken the magnetic field strength at a point if introduced? 1)Cu2)Al3)Liquid O24)Co |
| Answer» HEY mate here is your answer 1)CU HOPE it HELPS. | |
| 22. |
What is a neutralization reaction? Give example |
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Answer» inly USER Here is your ANSWER The reaction of acid and bases to give salt and water If you liked my answer then don't forget to MARK as BRAINLIEST answer |
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| 23. |
A mixture of gases h2 and o2 in ratio 1:4 what is molarmas of two gases |
| Answer» MOLAR MASS of H² = 2 and O²= 32 | |
| 24. |
The chalcogen with lowest electron affinity is 1)Oxygen2)Sulphur3)Selenium4)Tellirium. |
| Answer» 1)Oxygen.Hope it HELPS. | |
| 25. |
What is tincture of iodine? identify the solute and solvent in it |
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Answer» Hєℓℓσ ] ｡✿◈◉° ☟=============☟ ⒶⓃⓈⓌⒺⓇ ☟=============☟★Tincture of iodine is a SOLUTION found in alcohol either sodium iodide with a little POTASSIUM iodide solution and forms a mixture.★It is a weak solution of Alcohol.★It US reddish brown in colour.★Iodine is a type of antiseptic.★Solvent : ETHANOL and Water.★Solute: Elemental Iodine.________________________________ʜᴀᴠᴇ ᴀ ɢᴏᴏᴅ ᴅᴀʏ..! |
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| 26. |
A doubly ionized lithium atom is like h aton withz3. Finr the wavelength |
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Answer» has an ATOMIC number of 3 according to the QUESTION So, According to the question, = H with atomic number 3E = Here,n = 3 = SUBSTITUTING the values, we getE = × E = × E = 0.242 × Frequency = E/h = 0.242 × / 6.626 × = 0.0365 × Wavelength = c/frequency = 3 × / 0.0365 × = 82.19 × |
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| 27. |
Achievents of chemistry and its contribution in the well being of humankind |
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Answer» It focused on the “achievements of CHEMISTRY and its contributions to the well-being of HUMANKIND.” It aimed to raise awareness of chemistry among the general public and to attract young PEOPLE into the field, as well as to HIGHLIGHT the role of chemistry in solving global PROBLEMS. |
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| 28. |
Why calcium hydroxide is more soluble in cold water than hot water? |
| Answer» PLZZZ LOOK in GOOGLE U will FIND | |
| 29. |
One litre of 2M acetic acid and one litre of 3M ethyl alcohol were mixed. Theesterification takes place according to thereaction:CH,COOH + C,H,OH - CH,COOCH+ H₂OIf each solution is diluted by one litre waterthe rate would become -(A) 4 times(B) 2 times(C) 0.5 times(D) 0.25 times |
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Answer» option D is correctmole of =MOLARITY*VOLUME =2M*1L =2molefinal molarity after dilution=Molarity of acetic ACID after dilution=molarity of ethyl alcohol=3M*1L=3molefinal molarity of ethyl alcohol=1.5Mon SOLVING the equations we getso it is 0.25 times high |
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| 30. |
What will happen when a solution of sodium hydrogen carbonate is heated ? give the equation? |
| Answer» HYDROGEN carbonate (also KNOWN as sodium bicarbonate orbicarbonate of soda) has the chemical formula NaHCO3. When it is heatedabove about 80°C it begins to break down, forming sodium carbonate, water and carbon DIOXIDE. This type of REACTION is called a thermal decomposition.Hope it helps you. ✌✌Mark it the brainliest answer. | |
| 31. |
a dilute solution of sodium carbonate was added to two test tube-one containing dilute HCI (a) and the other containing dilute NaOH (b).the correct observation was |
| Answer» DILUTE HCL is TRUE of SODIUM CARBONATE | |
| 32. |
Why do acid releases H+ ions in presence of Water? |
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Answer» ..ANSWER:HYDROXIDE ions are still bases because they aceept hydrogen ions from acids and from WATER.An acid PRODUCES hydrogen ions in solution because it reacts with the water MOLECULES by giving a porton to them.plz marks this ans brillant dear and folow me...because i love science.......... |
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| 33. |
This is chemistry pls hellpmeeeeee |
| Answer» TION:OOO okgzjxggffehsjkenvxgejelsmbc_&2()!+())#!";+3 | |
| 34. |
what will be the physical state of a substance if its melting point is below room temperature and its boiling point is above room temperature? |
| Answer» 5 celciusExplanation:bdndmdmdmskskkskskd | |
| 35. |
What is absolute error? |
| Answer» TION:para which is ABSOLUTE is KNOWN as absolute error by and please FOLLOW me | |
| 36. |
Anyone from NIT Adityapur? I am Admitted here. (Mechanical Branch) |
| Answer» PLEASE REFRAIN from POSTING such IRRELEVANT QUESTIONS | |
| 38. |
how can u separate ammonium chloride and water from their mixture ? in one word |
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Answer» By HeatingExplanation:We can heat it at 100°c So that WATER start evaporating and ammonium CHLORIDE REST in bottom and aslo by DISTILLATION |
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| 39. |
Where is methylenechloride and methylamine used? |
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Answer» 1)Dichloromethane (DCM/methylenechloride)'S volatility and ability to dissolve a wide range of ORGANIC compounds makes it a useful solvent for many chemical processes. It is widely used as a paint stripper and a degreaser. In the food industry, it has been used to decaffeinate coffee and tea as WELL as to prepare extracts of hops and other flavorings. Its volatility has led to its use as an aerosol spray propellant and as a blowing agent for polyurethane foams2)CH3NH2(METHYLAMINE)Methylamine occurs endogenously from AMINE catabolism and its tissue levels INCREASE in some pathological conditions, including diabetes. Interestingly, methylamine and ammonia levels are reciprocally controlled by a semicarbazide-sensitive amine oxidase activity that deaminates methylamine to formaldehyde with the production of ammonia and hydrogen PEROXIDE. Explanation: |
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| 40. |
24g of carbon reacts with some oxygen to make 88 grams of carbon dioxide. find out how much oxygen must have been used |
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Answer» ctant mass is EQUAL to product mass.hence,24+X=88X=88-24X=64 GRAMS of OXYGEN is NEEDED to form 88 grams of carbon DIOXIDE with 24 grams of carbon. |
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| 42. |
Which among the following measurement contains the highest number of significant? |
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| 43. |
convert the following degree Celsius temperature to degree Fahrenheit. a) 40degree Celsius, b) 30degree Celsius |
| Answer» EE in FAHRENHEIT is 10430 DEGREE in fahrenheit is 86please MARK it as a BRAINLIST | |
| 44. |
Convert the following degree Celsius temperature to degree degree Fahrenheit., a. 40degree ccalculate the number of moles and molecules of Acetic acid present in 22 grams of it |
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Answer» egree celsiusso, F = 9*40/5 + 32 = 72 + 32 = 104 degree Fahrenheit .One mole of ACETIC acid = 60 g / molso, no of MOLES in 22 g = 22/60 = 11/30 = 0.36 One mole has 6 * 10^23 moleculesso, no. of molecules = 0.36 * 6 * 10^23 = 2.16*10^23 |
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| 45. |
Current of mA flowing in a long straight wire enters a uniform circular loop of radius R = 3÷4 m at pointP and exits at point Q to again pass through anotherlong wire shown. The net magnetic field at the centreof the loup is what? |
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Answer» hiii don't KNOW the ANSWER of this question...becuse i HATE MATH...so, SORRY..and plz follow me ..... |
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| 46. |
Largest wavelength in balmer series of he+ is ?? A)5/9Rh B)9/5Rh C)36/5Rh D)5/36Rh |
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| 47. |
HO-POHOHAcrylonitrile :Ace CEN (or) HC=CH-CEN |
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Answer» i dontknowtheanswerofthisquestionok UNDERSTOOD |
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| 48. |
01. What is Baking powder? How does it make cake soft and spongy |
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Answer» Baking powder is mixed with the flour. When WATER is added to this flour to make dough, baking powder undergoes a chemical reaction during which carbon dioxide GAS is produced. This carbon dioxide gas gets trapped into the dough and bubbles out which causes the cake to RISE making it SOFT and spongy.hope it helps.. |
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| 49. |
Is aldehyde and ketone both have same primary name oxo? |
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Answer» teI Alone ✍️✍️✍️✍️✍️✍️✍️【◆】【◆】【◆】【◆】【◆】【◆】⏭️If both alkyl groups in a KETONE are the same then the ketone is said to be symmetrical, otherwise unsymmetrical. Although USED infrequently, oxo is the IUPAC NOMENCLATURE for a ketone FUNCTIONAL group. Other prefixes, however, are also used.❤️➖❤️➖❤️➖❤️➖❤️➖❤️ |
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| 50. |
What is photoelectric effect? |
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Answer» ᴇᴄᴛʀɪᴄ ᴇғғᴇᴄᴛᴛʜᴇ ᴘʜᴏᴛᴏᴇʟᴇᴄᴛʀɪᴄ ᴇғғᴇᴄᴛ ɪs ᴛʜᴇ ᴇᴍɪssɪᴏɴ ᴏғ ᴇʟᴇᴄᴛʀᴏɴs ᴏʀ ᴏᴛʜᴇʀ ғʀᴇᴇ ᴄᴀʀʀɪᴇʀs ᴡʜᴇɴ ʟɪɢʜᴛ ʜɪᴛs ᴀ ᴍᴀᴛᴇʀɪᴀʟ. ᴇʟᴇᴄᴛʀᴏɴs ᴇᴍɪᴛᴛᴇᴅ ɪɴ ᴛʜɪs ᴍᴀɴɴᴇʀ ᴄᴀɴ ʙᴇ ᴄᴀʟʟᴇᴅ ᴘʜᴏᴛᴏᴇʟᴇᴄᴛʀᴏɴs. ᴛʜɪs ᴘʜᴇɴᴏᴍᴇɴᴏɴ ɪs ᴄᴏᴍᴍᴏɴʟʏ sᴛᴜᴅɪᴇᴅ ɪɴ ᴇʟᴇᴄᴛʀᴏɴɪᴄ ᴘʜʏsɪᴄs, ᴀs ᴡᴇʟʟ ᴀs ɪɴ ғɪᴇʟᴅs ᴏғ ᴄʜᴇᴍɪsᴛʀʏ, sᴜᴄʜ ᴀs ǫᴜᴀɴᴛᴜᴍ ᴄʜᴇᴍɪsᴛʀʏ ᴀɴᴅ ᴇʟᴇᴄᴛʀᴏᴄʜᴇᴍɪsᴛʀʏ |
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