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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. |
✨ Help me out Yr ✨Give me it's ◆ Chemical Equation ◆ OBSERVATION××××No spamming××××✔️✔️Best Ans Needed ✔️✔️~Nupu❣️ |
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Answer» Answer: If u ADD ZINC granules with HCL or H2SO4. The gas liberated will be Hydrogen.. |
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| 2. |
What is the difference between anion and cation |
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Answer» ANION are NEGATIVELY CHARGED Cation are Postively charged |
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| 3. |
The gas required for both combustion and rusting |
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Answer» The gas which is used as both rusting and BURNING is oxygen(O2).
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| 4. |
What is observed when a solution of potassium iodide is added to lead nitrate solution?What type of reaction is this? Write a balanced chemical equation for this reaction. |
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Answer» Answer: 1.Yellow PRECIPITATE of lead IODIDE is formed 2. DOUBLE Displacement/Precipitation Reaction 3. KI + PbNO3^2 - - > PbI2 +KNO3 Explanation: |
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| 5. |
1. Why toothpastes have mild bases?2. Why are carbonic acids and acetic acids are mineral acids but they are present in food stuff? |
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Answer» Answer: 1) In simple terms, some toothpastes (not all) use very mild BASES to help combat acid RESIDUE left by bacteria in the mouth. ... The toothpaste combats this acidity with a mild base. When an acid and a base REACTS, you get water and salt. These are essentially pH neutral and cause no harm to the teeth. 2) CARBONIC acid is CONSIDERED an inorganic acid because of the structure of the molecule. Usually organic compounds contains carbons and hydrogens but at least one hydrogen is bonded to a carbon. For carbonic acid, none of the hydrogen bonds to the central carbon thus carbonic acid is an inorganic compound. hope it helps ☺️ |
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| 6. |
The law of octaves was proposed by [a] newland [b] doberiener [c] lother meyer [d] mendleeve |
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Answer» a NEWLAND Octaves Explanation: |
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| 7. |
Which of the following represents a base a h b KCL c ch3oh h Di |
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| 8. |
The pollution which combines with water vapour to give sulphuric acid a product of acid rain |
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Answer» Answer: Acid rain results when sulfur dioxide (SO2) and NITROGEN oxides (NOX) are emitted into the atmosphere and transported by wind and air CURRENTS. The SO2 and NOX react with water, oxygen and other chemicals to form SULFURIC and nitric acids. These then mix with water and other materials before falling to the GROUND. Hope it helps . Can u plz Mark as Brainliest , I need it . Its By Bad.... |
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| 9. |
(i) एक परखनली में रखे लेड नाइट्रेट के विलयन मेंपोटैशियम आयोडाइड का विलयन मिलाने पर आप क्याप्रेक्षण करेंगे? |
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Answer» एक परखनली में रखे लेड नाइट्रेट के विलयन में पोटैशियम आयोडाइड का विलयन मिलाने पर लेड आयोडाइड का पीले रंग का तलछट प्राप्त होगा I - जब हम लेड नाइट्रेट के विलयन में पोटैशियम आयोडाइड का विलयन मिलाते हैं तब हमें लेड आयोडाइड का पीला तलछट और पोटैशियम नाइट्रेट प्राप्त होगा I - क्रिया कुछ इस प्रकार होगी : |
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| 10. |
Plzz Guyss fill it its very imp for me |
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Answer» 2) ANTHRAX 3) PORCINE CIRCOVIRUS 4)PISCICULTURE 5) SERICULTURE |
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| 11. |
The acid formed when the above product of oxidation of phosphorus reacts with water |
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Answer» PHOSPHORIC ACID is the answer |
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| 12. |
Calculate the work done during the reaction represented by the following thermochemical equation at 300 Kelvin 1.4.988kJ 2.-4.988 3.-49.88 |
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Answer» Answer: Sorry dear Really don't know the answer. Sorry for the inconvinience. |
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| 13. |
Define rigidity , compressibility and shape......... |
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Answer»
Answer please mark as Brainlist Rigidity refers to the property of a solid to resist CHANGE in its shape . ... compressibility is the property of a fluid DUE to which its volume decreases when pressure is applied . the particles in gases have LARGE spaces between them due to which their volume decreases too much when pressure is applied on them. |
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| 14. |
2. When a mixture is formed :Ataphysical change takes placeno change takes place(b) a chemical change takes place(d) both (a) and (b) |
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Answer» i don't KNOW SORRY sorry sorry sorry sorry sorry sorry sorry sorry sorry sorry sorry sorry sorry sorry sorry sorry sorry sorry sorry sorry sorry sorry sorry sorry sorry |
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| 15. |
What is the equation for the formation of baking powder using tartaric acid? |
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Answer» Sodium bicarbonate is NAHCO3 Tartaric acid is C4H6O6 So, the REACTION is: NaHCO3 + C4H6O6 + 2H2O(l) = 5CO2(G) + NAOH + 5H2(g) ... PLZ MARK MY ANSWER AS THE BRAINLISET MATE.... |
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| 16. |
1. The product formed on oxidation of phosphorus. |
Answer» diphosphorous TRIOXIDE and diphosphorous PENTOXIDE |
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| 17. |
How to convert 2 acetyloxy benzoic acid from phenol? |
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| 19. |
Tu three Holes of ethane (c6 h6] . calculatthe following No of roles of Carbon atoms no of Moles of hydrogen atomsno of molecule of ethane |
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Answer» (i) There are two atoms of Carbon in each C2H6 MOLECULES hence 1 mole of C2H6 will have 2 moles of carbon atoms. So that NUMBER of moles of carbon atoms in 3 moles of C2H6 = 2 × 3 = 6 moles (ii) There are six atoms of hydrogen in each molecules of C2H6 hence 1 mole of C2H6 will have 6 moles of hydrogen atoms. So that Number of moles of carbon atoms in 3 moles of C2H6 = 3 × 6 = 18 moles (iii) Each mole of any substance has 6.023 × 1023 particles so that 3 mol of C2H6 will have = 3 × 6.023 × 1023 = 18.069 × 1023 molecules. |
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| 20. |
Calculate the number of moles in 12 g of oxygen |
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Answer» 0.375 Here we are given the mass of oxygen GAS as 12 grams. MOLAR mass = 2×16 = 32 grams. We KNOW the formula to calculate the number of moles. = 0.375 moles. PLZ MARK MY ANSWER AS THE BRAINLIEST MATE... |
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| 21. |
Give an example of a decomposition reaction. Describe any activity to illustrate such a reaction by heating |
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Answer» Answer:caco3 -> cao + CO2 When calcium carbonate is HEATED it produces calcium oxide & carbon dioxide |
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| 22. |
Why caesium is not included in REACTIVITY SERIES |
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Answer» It is highly REACTIVE in nature so this is not included in reactivity series I hope this will HELP you |
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| 23. |
✨ Hey Guys...help me out !! ✨✔️✔️Give me it's Chemical Equation and OBSERVATION✔️✔️××××No Spamming××××~Nupu❣️ |
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Answer» When you ADD lead nitrate to potassium IODIDE, their PARTICLES combine and create two new compounds, a yellow solid called lead iodide and a white solid called potassium nitrate. Yellow clouds indicate that the chemical change has TAKEN PLACE. |
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| 24. |
Calculate the number of sigma bond and pi bond. |
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Answer» the NUMBER of SIGMA bonds are 20 and pi bonds are 1 only |
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| 25. |
Spi3 hybridisation:EEC of a 2570,SP hybridisation:ao te sp3 hybrid00 .. orbitals139EXO-CH 4 (MCTEX :-CH, (Methane)2003 |
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| 26. |
when a mixture is formed a physical change takes place a chemical change takes place noton takes place both a and b |
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Answer» ANSWER:a physical CHANGE TAKES place Explanation:hope it will HELP you!! |
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| 27. |
"Axample..48Calculate deltaG for the reaction at 25°CCO + 2H2- CH3OH () deltaGº = -24.8 kJ maif Pco = 4 atm, Ph2 = 2 atm, Pch3oh = 2 atm |
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Answer» Answer: plz follow me best wishes to go back and I have a two WEEK trip in the eid the LINK to my mom is in touch soon to hm bhi sst Ka ha na PO and I will yioutewwryui I can get it out here unsubscribe me ok I can do it for you and family are well I have some questions of CLASS of the questions |
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| 28. |
How to convert 2 acetyloxy benzoic acid from plenol? |
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Answer» Answer: Just by heating the Phenol with Zinc dust will give you required BENZENE ... ZN SHOWS an oxidation STATE of +2. .
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| 29. |
The valency of elements is...... (negative/positive /zero) |
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Answer» Answer: POSITIVE IS THE ANSWER. HOPE IT HELPS!! :) |
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| 30. |
The valency of an element is .......... |
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Answer» it's combining capacity or/ the no. of electron can be GAINED or loosed by an element Hope it HELP.. |
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| 32. |
Reaction which attain a state of equilibrium under a given set of reaction condition is said to bea)forward reaction b)backward reaction c)reversible reaction d)Irreversible reaction |
| Answer» REVERSIBLE reaction. It is a reaction in which both FWD and backward REACTIONS are PRESENT. | |
| 33. |
Give an example of the reducing property of ammonia |
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Answer» Answer: AMMOINA is a active reducing agent.it has this property because of presence NITROGEN ATMOS that have an oxidation "-3".So the reaction with copper oxide is used to produce nitrogen. |
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| 34. |
Convert 340k to degree Celsius |
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Answer» Answer: C = 340-273 = 67 Thanks for Reading You can convert between Celsius and Kelvin LIKE this: Kelvin = Celsius + 273.15. Often, the value of 273 is used instead of 273.15. Check with your teacher on this point. All EXAMPLES to follow will use 273 |
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| 35. |
Difference between n-pentane and 2methylbutane. |
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Answer» Answer: The difference between n-pentane , both have different STRUCTURE. Explanation: In case of n-pentane, it has straight chain structure and does not expose more to outside,that's why it requires HIGH energy for the bond DISSOCIATION leading HIGHER BOILING point. In case of 2methylbutane, it has branched structure and exposed more to outside,that's why it requires to lower boiling point. . . . . . hope this helps you please mark as brainliest follow me |
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| 36. |
What is conformational isomerism & types of its?? |
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Answer» Answer: Conformational isomers are stereoisomers that can be converted into one ANOTHER by rotation around a single bond. (Note: Conformational isomers are normally best seen using Newman PROJECTIONS, so this structural representation will be used in this section of the tutorial. If you are not familiar with Newman Projections, click here to learn about them.) For example, eclipsed, gauche, and anti BUTANE are all conformational isomers of one another. (Recall that eclipsed means that identical groups are all directly in-line with one another, gauche means that identical groups are 60 degrees from one another, and anti means that identical groups are 180 degrees from one another.) These molecules can be interconverted by ROTATING around the central carbon single bond. For example, eclipsed butane can be made into gauche butane by rotating 60 degrees and into anti butane by rotating 180 degrees. Similarly, gauche butane can be made into anti butane by rotating 120 degrees. This rotation can be seen in the animation below. Because of this rotational PROPERTY, eclipsed, gauche, and anti butane are conformational isomers of one another. |
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| 37. |
X. What happens when a glass rod dipped into ammonia solutionis exposed to HCl gas? |
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Answer» Answer: You can observe dense WHITE fumes of NH4Cl Explanation: This is because HCl gas and NH3 gas combine to form Ammonium Chloride as HCl is ACIDIC and NH3 is BASIC. |
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| 38. |
Rutherford's modal Draw and labeled name |
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Answer» here is RUTHERFORDS MODEL HOPE it HELPS |
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| 39. |
Draw a well labelled diagram showing sublimation of camphor |
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Answer» Explanation: HOPE it will help you pls FOLLOW me and mark me as brainlist |
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| 40. |
Suggest a method for preparation of methylenecyclohexane from cyclohexanone |
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| 41. |
Is C2H4O2 a carboxylic acid |
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| 42. |
12 class ke Baad kon kon se job hote hai??????? |
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Answer» Answer: |
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| 43. |
Which type on reaction is this |
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Answer» DECOMPOSITION reaction^^ hope it HELPS MARK me BRAINLIEST |
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| 44. |
Why does the water kept in an earthen pot become cool in summer |
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Answer» The water kept in an earthen pot remain cool even in SUMMER because earthen pot has many small HOLES. Water seeps out through them and evaporates from the surface of the pot. The ENERGY needed for evaporation is taken from the water kept in the earthen pot. As a result, water kept in earthen pot BECOME cool. |
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| 45. |
Organic chemistry named reactions definition and reactions |
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Answer» PLZ plz plz plz plz plz MARK as BRAINLIEST |
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| 46. |
Organic chemistry named reactions |
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Answer» Answer:
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| 47. |
Explain why carbon generally forms compounds by covalent bonds or don't form ionic bonds |
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Answer» Answer: In order to FORM ionic bond by carbon it NEEDS to loose 4 eletron or to gain 4 electron which is impossible by carbon so it only form covalent bond. carbon has valency 4 to ATTEND NOBLE gas configuration it need to gain or lose 4 electrons so that it would form ionic compound. ... THUS carbon doesnt form ionic compounds PLEASE MARK AS BRAINLIEST |
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| 48. |
Which of the following undergoes electrolysis onpassing electricity?(1) Starch(2) Glucose(3) Silver Nitrate (4) Ethyl acetate |
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Answer» Ethyl acetate UNDERGOES ELECTROLYSIS on passing electricity. Hope it helps you and don't forget to BRAINLIEST me... |
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| 49. |
the two colours seen at the extreme end of the pH chart are: (a) red and blue (b)Red and Green (c) green and blue (d) orange and green |
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Answer» a RED and blue. hope it HELPS |
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