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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. |
Mg2 is smaller than o2- in size, though both have same electronic configuration. Explain. |
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Answer» Mg(+2) and O(-2) may have same ELECTRONIC configuration, but "Mg" has more PROTONS compared to "O" which makes the attraction of electrons more and makes size less |
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| 2. |
Due to which property aluminium foils can be made?? Pls answer |
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Answer» Malleability |
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| 3. |
Give two facts each to support. (1)Hydrogen resembles alkali metal.(2) H resembles halogens |
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Answer» Hydrogen resembles alkali METAL because it has 1 free electrons in it's outermost shell It is an electropositive element . It also acts as reducing agents LIKE alkali METALS so we can SAY Hydrogen behaves like alkali metals. Hydrogen resembles halogens because it requires only 1 electron to complete it's DUPLET rule and become stable like halogens. It also forms diatomic moleclues like halogens. So we can say it also behaves like halogens. |
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| 4. |
How to remove the impurities from seawater |
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Answer» HEYA BUDDY!!! |
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| 5. |
What is a paper? (a) solid (b)liquid (c)gas and pls explain how |
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| 6. |
Which is the56 element in periodic table |
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Answer» Heya MATE ur ANSWER is here |
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| 7. |
Plz say the full form of this formula |
| Answer» SODIUM HYDROXIDE ,POTASSIUM hydroxide, sodium CARBONATE, potassium carbonate | |
| 10. |
Difference between O2 and H20 |
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Answer» O2 is the OXYGEN MOLECULE i.e, oxygen gas, contain O only H2O is the water , contain H and O |
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| 13. |
Please answer me question number 9 |
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Answer» Hy mate , your answer is here |
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| 14. |
Please answer me the 9th question |
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Answer» Isomers of molecule have same CHEMICAL FORMULA but DIFFERENT structure. |
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| 15. |
Answer me fast answer q 7 |
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Answer» 7 i) CH3COCH2CH3 should be PROPANONE ii) CH3COOH is ethanoic acid |
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| 17. |
two observation that determine that a chemical reaction has take place along with corresponding balanced chemical equation for the justification of each observation |
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Answer» 1) Evolution of GAS: |
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| 18. |
Hii Friends...❤️Plz help me wid this !! ☺️ |
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Answer» HII ☺️ You KNOW that , dU = Cv dT => Cv = dU / dT i.e, Slope of U-T graph . So, here in your QUESTION Slope of B is greater than slope of A that means (Cv) of A < (Cv) of B . So your correct answer is option C . ___________________________ Hope this helps ! ☺️ |
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| 19. |
Why crystals of ionic compound do not conduct electricity? |
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Answer» They do not conduct electricity when thet are in SOLID but they do conduct electricity when they are dissolve in water or when they are melted because in MOLTEN STATE these ICONIC compounds FORM ions |
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| 20. |
Which two has low ignition temperature petrol or kerosene |
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Answer» The IGNITION TEMPERATURE of PETROL is LOWER than that of KEROSENE |
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| 21. |
Hard water is not suitable for washing purpose why.. |
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Answer» As hard WATER contains many metal SALTS,these salts react with the soap and form scum which sticks to the clothes and MAKES the soap LESS effective. |
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| 22. |
What is exothermic and endothermic reaction |
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Answer» REACTIONS in which HEAT is LIBERATED is called exothermic reactions.... Reactions in which heat is ABSORBED is called ENDOTHERMIC reactions.... |
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| 24. |
What is the common name of NaH Co3 |
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Answer» It is most commonly known asbaking SODA. NaHCO3 is a chemical compound called sodium bicarbonate (IUPAC name: sodium hydrogen CARBONATE with the formula). |
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| 26. |
Name a element which has same number of protons but different mass |
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Answer» The element is HYDROGEN (H) mass no. is 1 and Deuterium (D) mass no. is 2 but same no. of protons |
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| 27. |
Why is hydrogen peroxide kept in coloured bottles give reaction and type of reaction also? |
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Answer» H2O2------> H2O +O2. It is Reduction reaction. It is kept in coloured bottle so that it should not REACT with ENVIRONMENT. |
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| 28. |
A white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the solution, a white precipitate is obtained which does not dissolve in dil. Hno3 the anion could be |
| Answer» CL-( nacl+h2o =NAOH. WHITE PPT of AGCL | |
| 29. |
what is the ratio between root mean square speed average speed and most probable speed of the molecule in the sample of the gas |
| Answer» RATIO of VRMS VAVG and VMP | |
| 30. |
How to balance the chemical equation c2h2+o2=co2+h2o |
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Answer» Combustion of ethyne in the presence of oxygen PRODUCE CARBON dioxide, water VAPOUR and heat energy. |
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| 31. |
The compound formed by combining calcium ion and oxide ion is commonly known as |
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Answer» Hey!! |
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| 32. |
How to calculate the molecular mass |
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Answer» It is easy to find the molecular mass of a COMPOUND with these steps. |
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| 33. |
Which is the oxidizing agent,ReducingAgent,Substamce oxidized,Substance Reduced in(H2+F2-------2HF) |
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Answer» (0) (0) (+1)(-1) H2 + F2---------2HF oxidising agent - F2 - REDUCED substance reducing agent - H2 - oxidised substance please follow me |
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| 34. |
Name the process you would use to separate a mixture of two miscible liquid like acetone and water |
| Answer» CRYSTALLIZATION METHOD SEPRATE | |
| 35. |
Ethylene to formaldehyde |
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Answer» By REDUCTIVE OZONOLYSIS |
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| 36. |
When acetone reacts with grignard reagent it gives followed by hydrolysis, ut gives? |
| Answer» TERTIARY ALCOHOLS will be FORMED | |
| 37. |
22 gram of Co2Find mole molecules and atom |
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Answer» 44grams of CO2 = 1mole |
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| 38. |
What is the change in orbital radius when electron in hydrogen atom undergoes the paschen transition? |
| Answer» | |
| 40. |
Generally metal are not found in free state give reasons? in their 2 marks. |
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Answer» Heyaa☺ |
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| 41. |
Which of the following is used as raw material for the manufacture of rayon |
| Answer» | |
| 42. |
Explain why sodium chloride does not conduct electricity but in the molten state or in aqueous solution it is good conductor of electricity |
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Answer» It is because when sodium chloride is in solid state the ELECTROSTATIC force between the molecules is HIGH which does not ALLOW it to break into ions. When sodium chloride is in the molten or aqueous state It's electrostatic force of ATTRACTION between the molecules is LESS and thus it easily break into ions to conduct electricity. |
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| 43. |
Which is more reactive na or na+ explain |
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Answer» __________________________________ Moreover, Na(Sodium) isn't even reactive because this smybol shows that Sodium is in octet CONFIGURATION and is stable. Hence, it is reactive and will lose 1 electron to become stable. SINCE, it's outermost shell is full, it has attained stable configuration. This means that it is no more reactive since it won't form any BOND. __________________________________ |
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| 44. |
Here Is A Question For You....✌️Make A Electron Dot Structure By Your own.Please Don't Copy From Google.✨Best Answer Will Be Brainliest..✌️✌️♥️♥️❣️❣️ |
| Answer» ANSWER: The FORMULA for cyclopentaneis C5H10. Its electron dot structure is GIVEN in pic | |
| 45. |
How many grams of neon will have the same number of atoms as 4gram of calcium |
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Answer» Mass of 1 ATOM of Ne = Molar mass/Avagadro No = 20 / 6.022*10²³ g Molar mass of Ca = 40 g Number of particles in 4 g of Ca = 4/40*6.022*10²³ = 6.022*10²² atoms Therefore, number of atoms of Ne same as 4 g of Ca = 20*6.022*10²²/6.022*10²³ =20/10 =2 g Ans: 2g of Ne has the same no of atoms as 4g of Ca. Hope you UNDERSTOOD it now! |
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| 46. |
What is the Structure of isopentane |
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Answer» This Is The STRUCTURE Of Iso-Pentane... |
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| 47. |
Compare hydrogen and halogen on the basis of physical state |
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Answer» Which following PROCESS is used in the Exracive METALLURGY of magnesium A) ELECTROLYSIS of its fused salt b) self reduction c) electrolysis of its aqueous solution D) THERMITE reduction |
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| 48. |
How to make wise use of plastics and develop environment friendly habits? |
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Answer» Plastic is NON biodegradable it can't be used eco friendly because it is harmful in EVERY MANNER |
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| 49. |
Oxidation state of S in H2S2O8 |
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Answer» H2S2O8 = 2+2x+[-2]*6+[-1]*2 =2x-12 2x-12=0 2x=12 x=12/2 x=6 So OXIDATION no.of S in H2S2O8 is +6 |
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| 50. |
Isotonic solutions have samea. Molar concentration b. Normalityc. Molarity d.None of these |
| Answer» MOLAR CONCENTRATION . | |