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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. |
Which colour will be released when sodium borox is reacted with litmus? |
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Answer» Answer: BORAX is sodium salt of BORIC ACID. Na2B4O7.10H2O. So, in water, it hydrolyses to yield, NaOH and Boric acid. so it is alkaline in nature HENCE red LITMUS turns blue Explanation: |
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| 2. |
Which compound most readily react with an electrophile? |
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Answer» Answer: phenol>toluene>benzene>CHLROBENZENE. plz mark as brainliiest answer. |
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| 3. |
The rate of diffusion of helium and methane under identical conditions of temperature and pressure will be |
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Answer» Answer:2:1 Explanation: r1/r2=(m2/m1)^1/2 r = rate of diffusion m = MOLECULAR weight ATQ: r1/r2 = (16/4)^1/2 = 4:1 MW of CH4 =16 MW of HE2 =4 |
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| 4. |
Latts 0-9HsHybridisation of oxygen in diethylether is to1) sp 2) sp 3) sp3 4) spd |
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| 5. |
Why are carbon and its compounds used as fuels for most applications? |
Answer» Hello!Carbon and its compounds burn in OXYGEN to give carbon dioxide and RELEASE heat and LIGHT. Most carbon compounds release a large amount of heat and light on BURNING and therefore are used as FUELS for most applications. Hope this helps@adiba31✌❤️✌ |
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| 6. |
Give theof a blockgeneral electronic continuatand p-bloc elements |
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| 7. |
Monomer of Modacrylic |
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Answer» ........................... |
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| 9. |
How to find emperical formula of compound contain9 g carbon,1 g hydrogen, and 3.5g nitrogen |
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Answer» Since the scale for percentages is 100, it is most convenient to CALCULATE the mass of elements present in a sample weighing 100 g. The calculation is “most convenient” because, per the definition for percent composition, the mass of a given element in grams is numerically EQUIVALENT to the element’s mass percentage. This numerical equivalence results from the definition of the “percentage” unit, whose name is derived from the Latin phrase per centum meaning “by the hundred.” Considering this definition, the mass percentages provided may be more conveniently expressed as fractions: \(\begin{array}{lll}\\ 27.29\%\text{C}& =\hfill & \frac{27.29\text{g C}}{100\text{g compound}}\hfill \\ 72.71\%\text{O}& =\hfill & \frac{72.71\text{g O}}{100\text{g compound}}\hfill \end{array}\) The MOLAR amounts of CARBON and HYDROGEN in a 100-g sample are calculated by dividing each element’s mass by its molar mass: \(\begin{array}{lll}\\ 27.29\text{g C}\left(\frac{\text{mol C}}{12.01\text{g}}\right)& =\hfill & 2.272\text{mol C}\hfill \\ 72.71\text{g O}\left(\frac{\text{mol O}}{16.00\text{g}}\right)& =\hfill & 4.544\text{mol O}\hfill \end{array}\) Coefficients for the tentative empirical formula are derived by dividing each molar amount by the lesser of the two: |
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| 10. |
HiiiWhat can you say about the boiling point of the liquids which collect at the bottom as residue in fractionating column? |
Answer» HELLO!❤️Many products like Paraffin Wax, Asphalt etc. are obtained at the bottom of FRACTIONATING COLUMN since the components of this fraction are non-volatile and have very high boiling points. Hope this helps@adiba31❤️✌❤️ |
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| 11. |
The general formula of ethers isT) CHO 2) C H2n+20) C H2n+20 4) C,H2,OC H20 |
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| 12. |
Mcq znS shows ___ a) schottky defect b) interstial defect. c) frenkle defect d) vacancy defect |
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Answer» ANSWER:C FRENKEL DEFECT is SHOWN by Zns Explanation: |
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| 13. |
What are the characteristics of matter ?plzz tell me |
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Answer» matter OCCUPIES SPACE and has VOLUME ........ PLZ follow me |
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| 15. |
What do you mean by triplet codon |
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Answer» Explanation: Triplet codons are the smallest units of uniform length that can code for all AMINO acids The DNA sequence of a gene is DIVIDED into a SERIES of triplet codons. |
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| 16. |
What is Anisotropy?Give an example for the substances that are Anisotropic? |
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Answer» Answer: having a physical property which has a different value when measured in different directions. An example is WOOD, which is stronger along the grain than across it. (of a property or phenomenon) varying in MAGNITUDE according to the direction of MEASUREMENT. "ELECTRON SCATTERING is anisotropic" Explanation: |
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| 17. |
A blue coloured salt become white on heating. give reason . |
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Answer» Answer: Because it lost its WATER of CRYSTALLISATION that is water molecules present in the SALT or compound.
Plz MARK as BRAINLIEST |
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| 18. |
What type of nutrition is used by cuscuta, ticks, lice, leeches? |
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Answer» SORRY for this ..................... |
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| 19. |
Which metals are generally extracted by electrolytic process? |
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| 20. |
Which of the followinh contains greatest number of oxygen atoms? |
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Answer» Which of the FOLLOWING???? |
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| 21. |
When o2 combined with h2 what is the ratio of water form? |
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| 22. |
When sugar is dissolved in water the volume of water? |
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Answer» It remains same Explanation: Dissolved SUGAR occupies the space between the water MOLECULES |
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| 23. |
The molarity of a solution obtained by mixing 750 ml of 0.5 m hcl which 250ml of 2m hcl will be |
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Answer» M1V1+M2V2/v1 + v2 750*0.5+250*2/750+250=0.8750 MOLAR |
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| 24. |
The number of electrons delivered at the cathode during electrolysis by a current of 1 ampere in 60 sec is (charge on electron = 1.60*10-19 c) |
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Answer» as Q= n* so no of electrons = q/ I*t no of electrons =( 1.6* 10-19)/ 1*60 = 2.67*10∧-21 Explanation: |
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| 25. |
£|£CT®0LiT£$Feature of electrolyte in our body ?Or their any function in our body |
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Answer» ........................................................................ PLEASE MARK ME AS BRAINLIEAST #FOLLOW me........... . . . . . have a great DAY ahead..... |
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| 26. |
Atomic number of nitrogen is 7 the atomic number of the third member in the same family is |
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Answer» Answer: The nitrogen family consists of FIVE elements, which start with nitrogen on the PERIODIC table and move down the group or column: nitrogen phosphorus arsenic ------: 33 antimony bismuth Explanation: The nitrogen family is element group 15 of the periodic table. Nitrogen family elements share a SIMILAR electron configuration pattern and follow predictable trends in their chemical properties. Also Known As: Elements belonging to this group are also known as pnictogens, at TERM derived from the Greek WORD pnigein, which means "to choke". thank u.. |
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| 27. |
Give examples that the matter which will be available in different states |
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Answer» Answer: Nitrogen (N2) is the EXAMPLE of MATTER that will be AVAILABLE in three different states. Most of the material on the earth exist in three different states, namely SOLID, liquid, and gas. |
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| 28. |
A. Match the column:Column 11. Tropic of Cancer2. Standard meridian3. Southernmost point of India4. Southernmost point of India's mainland5. Northernmost point6. Easternmost meridian7. Westernmost meridian8. Prime meridian9. Latitudinal extent10. Longitudnal extentColumn II68° 7 E and 97° 25 E23° 30'N37° 6 N8° 4' N6° 4'N68° 7' E0097° 25' E82° 30' E8° 4' N and 370 6N |
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Answer» Answer: 1,23degree30,N 2,82,1/2E 3,97 4,8 5,37 6,97 7,68 8,00 9,68-97 10,8-37 |
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| 29. |
ZnS shows ___ McQ of subject chemistry tell the answer |
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Answer» ANSWER:ZNS SHOWS FRENKEL defect Explanation: |
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| 30. |
Heya!. What are processed or Secondary Fuel? |
Answer» PROCESSED FUELPrimary fuels include NUCLEAR fuels, biofuels and fossil fuels. These fuels are processed from the form found as a natural resource and can also be considered energy currencies. Secondary FuelSecondary fuels are easier for ENGINES to BURN, so are often made from crude oil as a way of GETTING the most energy out as possible. Follow Me! |
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| 31. |
What is the difference between molecular mass and molar mass |
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Answer» Answer: MOLECULAR mass is the total mass of the MOLECULE of that SUBSTANCE whereas |
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| 32. |
What amount of oxygenRequired to complete combustion ofof 2 Litre Butan gas. C4H10 main componet of LP.G. |
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Answer» combustion reaction of butane is .. here it is CLEAR that, for 2 mole of butane,13 mole of oxygen is REQUIRED to COMPLETE combustion reaction. given, VOLUME of butane = 2L so, mole of butane = 2L/22.4L = 1/11.2 now, for 2 moles of butane require 13 moles of oxygen, so, 1/11.2 mole of butane require 13/2 × 1/11.2 = 13/22.4 mol of oxygen. so, amount of oxygen = number of mole of oxygen × 22.4 L = 13/22.4 × 22.4 L = 13L hence, 13L oxygen is required to compete combustion of 2L butane. |
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| 33. |
What is the definition of environmental chemistry?? ⁉⁉⁉❓❓❓❓❓❓❓ |
Answer» Environmental ChemistryEnvironmental chemistry can be DEFINED as the study of the sources, reactions, transport, EFFECTS, and fates of chemical species in the air, soil, and water environments; and the effect of HUMAN activity on these. It is different from green chemistry, which tries to REDUCE potential pollution at its source. Follow Me! |
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| 34. |
What happens when 2 bromopentane is treated with alcoholic koh? |
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Answer» It forms Bromopent-2-ene |
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| 35. |
How to do experipment of chuning without using fire |
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Answer» ggggbbbbbhhhh gggggghhhnmkkk |
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| 36. |
A tojustify?Give thecompound -chemicalformulas ofthe followG-Gel-Iron (1) oxidePotassium chlorideLed sulphateCo.,en 0 anale(2) |
Answer»
hope this HELPS.... |
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| 37. |
What happens when sodium bicarbonate is heated |
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Answer» Answer: Baking soda is sodium BICARBONATE, or it can also be referred to as bicarbonate of soda and saleratus. When heated, it easily loses carbon DIOXIDE and the carbon dioxide makes bubbles and this creates channels, which is what GIVES baked goods a fluffy and light texture. The trapped carbon dioxide bubbles are what allow the baked GOOD to rise... Hope it will HELP you... Pls mark me brainliest.. |
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| 38. |
Explain the symbols in chemical reaction |
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Answer» BUT WHERE IS THE SYMBOLS |
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| 39. |
What happens when electric current is passed through potassium chloride |
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Answer» Answer: A current will electrolyze molten KCL, liberating liquid potassium (unless the SALT’s temperature is > 1052 K, the boiling point of potassium) and gaseous chlorine. If you are referring to a WATER solution of KCl—please be specific, it’s important—you get KOH solution, PLUS a mixture of O₂ and Cl₂ escaping the solution at the anode, plus hydrogen escaping at the cathode. Explanation: PLEASE MARKS BRAINLIEST!!!!!!!! |
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| 40. |
Explain how Carbon dioxide is able to control fire. |
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Answer» CO2 being heavier than oxygen, covers the fire like BLANKET and also brings down the temperature of FUEL. SINCE, contact between the fuel and oxygen is cut off the fire comes undercontrol. |
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| 41. |
with the help of an activity explain that hydrogen and oxygen are released when an electric current passed through electricity. |
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| 42. |
Activity to demonstrate the latent heat of fusion |
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Answer» The amount of heat ENERGY required to CHANGE 1kg of a solid into liquid at its melting point at one atmospheric pressure is called Latent Heat of Fusion ACTIVITY - Take 1kg of SOAP (solid) in a pan and heat it until it melts (melting point) , the amount of heat energy required to melt it (soap) at one atmospheric pressure will be the Latent Heat of Fusion. |
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| 43. |
What type of reaction is combustion of coal in air? |
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Answer» Answer: Combustion, or burning, is a high-temperature exothermic redox CHEMICAL reaction between a fuel (the REDUCTANT) and an oxidant, usually atmospheric OXYGEN, that produces oxidized, often gaseous products, in a MIXTURE termed as smoke. Hope it will help you... Pls mark me brainliest... |
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| 44. |
What type of oxides are formed when metals combine with oxygen? |
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Answer» Answer: Your answer is here, Metals react with OXYGEN in the AIR to produce metal oxides. They are BASIC oxides. All METALLIC oxides are not harmful in nature. Example :- Ca+O2--- CaO Hope it will help you... Pls MARK me brainliest... |
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| 45. |
What is molarity of a solution which is 10 w/v nacl? |
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Answer» Answer: Explanation: I'm USING the formula to calculate molarity when weight by volume percentage is given. You can solve it WITHOUT the formula as well.
M = w/v% × 10 --------------------------------- Molar mass of solute M = 10 × 10 ----------- 58.5 M = 1.71 M is the answer Pls pls pls mark it as BRAINLIEST |
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| 46. |
The solubility of copper sulphate is more in hot water than cold water explain |
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Answer» because it is LESS REACTIVE in REACTIVITY SERIES |
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| 47. |
Define Diffusion with example |
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Answer» The inyermixing of PARTICLES of TWO different types of matter on their own is called DIFFUSION. |
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| 48. |
Define four different types of chemical reaction and write down 7 example of each |
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Answer» Answer: Direct COMBINATION Decomposition Displacement Double Displacement Explanation: Direct combination or synthesis is a reaction in which two or more substances combine together to form a single substance C+O2=CO2+Heat Fe+S=FeS Decomposition is a reaction is breaking of a compound either into elements or simple compounds such that these products do not recombine to form the ORIGINAL compound. it occurs in the presence of heat or light or even by electric current. 2Hgo=2Hg+O2 2H2O=2H2+O2 Displacement a reaction in which a more active element displace a lest active element from its salt solution CuSO4+Zn=ZnSO4+Cu 2KI+Cl2=2KCl+I2 Double Displacement or Double Decomposition is a reaction in which two compounds in a solution REACT to form two NEW compounds BaCl2+Na2So4=BaSO4+2NaCl CuSo4+H2S=CuS+H2SO4 Hope it HELPED |
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| 49. |
- 28.4 lit of hydrogen and 11. & lit of chlorinegives hydrogen chloride . How many moles ofhydrogen formed. |
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| 50. |
5. In the balanced equation 4, b, c and d arerespectively aFe 0, +bH, FedH,O(a) 1, 1, 2, 3(b) 1.1.1.1(c) 1, 3, 2, 3(d) 1, 2, 2, 3 |
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Answer» Explanation: (d)1,3,2,3 Please follow me and MARK me as a brainlist answer. Please. |
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