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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. |
Al(OH)3 + H2SO4 + Al2(SO4)3 + H2O |
Answer» 2AL(OH)3 + 3H2SO4 = AL2(SO4)3 + 6H2OIt is balanced now ! Hope u needed this only ! |
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| 2. |
Please solve this problem and help me |
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Answer» Na+H2O--->NaOH+H2 here is the REACTION |
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| 4. |
CuSO4 5H2O is the hydrous form of copper sulphate. what is the anhydrous form's color and formula? |
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Answer» Answer: Copper sulfate pentahydrate | CuSO4.5H2O or CuH10O9S | CID 24463 ... 49 613 17; CUPRIC sulfate (copper sulfate and lime combined, dry) ... 3.2.2Color/Form ... it readily forms soluble ALKALINE complexes at SUFFICIENTLY high concentrations of ... Anhydrous copper sulfate causes hydroxylamine to ignite . |
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| 5. |
Allynes are acidic in nature why??? |
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Answer» Answer: ALKYNES are acidic in nature due to the FOLLOWING reason The acidity of a terminal alkyne is due to the high level of s character in the sp hybrid orbital, which BONDS with the s orbital of the hydrogen ATOM to form a single covalent BOND. The high level of s character in an sp‐hybridized carbon causes the overlap region of the σ bond to shift much closer to the carbon atom. |
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| 6. |
Show me the seperation of the mixture of nh4cl , cacl2 , caco3 in a flowchart form by showing all the methods of seperation [need an expert in chemistry to do this as tomorrow I am having final exam ] |
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Answer» rxjbjkfgibbfuhbvxibdhi yiveiobf I ifijphb |
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| 7. |
Why does Pyridimine str. doesnt show Resonance |
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Answer» Answer: ORIGINALLY Answered: why does pyridine does not SHOW resonance? But,the lone of electron on nitrogen ATOM does not participate in the resonance with the pi electron of pyridine RING . ... Consequently , pyridine does not exhibits resonance with the pi electron of pyridine ring .hope it HELPS ☺️ |
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| 8. |
solution of NaOH has a concentration of 4 g/dm3. what is the mass of NaOH contained in 250 cm3 of this solution |
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Answer» Answer: 1gram. Explanation: 4G/dm3 = 4g per litre. 250cm3 means .25 Litres. |
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| 9. |
if (n) is lattice points per cell of the cubic system, (N) and (M) are the avogadro's number and atomic weight, respectively, and rho is the density of the element, then the lattice constant (a) is |
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| 10. |
What chemicals do you need to make an explosion......I just want to know |
Answer» Any Acid and WATER Mixture can BLAST( CAUTION ) Bhai ISSE GHAR me Try Mat Karna Becoz mai Bhugat chuka HU XD |
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| 11. |
How to seperate NH4Cl , CaCl2 , CaCO3 show in a flowchart form . Please reply fast tomorrowI have final exam |
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Answer» separate??? I think there is some problem with your QUESTION plz type your question again |
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| 12. |
Which one of the following free radicals is the most stable |
Answer» HELLO..(a) is the CORRECT answer....FOLLOW me.....BYE..♡ |
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| 13. |
Write the structural formula of acetone and benzene DONT SCAM. |
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| 14. |
Which of the following will most readily undergo heterolytic cleavage? |
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Answer» HEY cutie.....❤️ hru DEAR CH3CH2Clbe happy nd STAY SAFE dear.... plzz plzz mark it brainliest ❤️ |
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| 15. |
What is the general formula of akline group? |
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Answer» The general formula for the alkenes is C nH 2N, where n is the NUMBER of carbon ATOMS in the molecule. Decene is an alkene. |
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| 16. |
Project work on leadership quality |
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Answer» what?????????????????? |
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| 17. |
CH3 -CH=CH-CH2-CH2-OHis this pentanol |
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Answer» no it's pentenol having DOUBLE bond in between... hope it HELPS... |
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| 18. |
Some non metals are very reactive in air, hence they are kept in water? But water also has oxygen up to some extent, so why don't the non metals react with that oxygen |
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Answer» The OXYGEN in water is in the water MOLECULE which can't react. And water naturally doesn't CONTAIN Oxygen dissolved but phytoplanktons carries the dissolution of oxygen in the water which are producers of aquatic life, produces Oxygen by photosynthesis. I am not sure.. but I think it is the right ANSWER |
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| 19. |
What does the formula CO2 signify |
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Answer» Answer: It's FORMULA of CARBON Dioxide... it SHOWS that there's an atom of Carbon joined with 2 OXYGEN atoms to FORM an compound... Explanation: hope it helps... |
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| 20. |
Which of the following both the metals are produced by electrolysis of only their fused chlorides?A) Cu,AlB) Na,HgC) Au,HgD) Fe,Hg |
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| 21. |
Give equation to show the effect on lead nitrate crystals ? |
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Answer» ...... |
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| 22. |
Explainaton of ooblack |
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Answer» EXPLANATION:it is the BLACK MOON I don't KNOW |
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| 23. |
What is common among plaster of Paris, sodium carbonate, gypsum |
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Answer» They are all hydrated, CRYSTALLINE salts. i.e They have water of crystallisation with them. Plaster Of Paris - CASO4 . 1/2 H2O Sodium Carbonate - Na2CO3.10H2O Gypsum - CaSO4.2H2O Hope it HELPS!!! |
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| 26. |
Conversion of methane to but-2-ene |
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Answer» Answer: methane is CH4 and butene is CH2=CH2. so just add one more carbon by carbon dioxide and the OXYGEN in carbon dioxide will react with hydrogen to FORM water. At LAST but-2ene is ready. Hope it helps. Mark me as Brainliest. Much love . Thank you. |
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| 27. |
if mass by mass concentration of copper sulphate is 11.11% and the mass of water is 320g. calculate the mass of copper sulphate |
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Answer» %SALUTE = Mass of salute/ Mass of SOLVENT ×100 Given % salute = 11.11% Given solvent = 329g Put the VALUES, 11.11 = Mass of salute/ 320 × 100 11.11 = 5/ 16 × Mass of salute 11.11 × 16/5 = Mass of salute 35.552 = Mass of salute Mass of salute = 35.552 G Hope this help u! |
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| 28. |
Answer for b. Please help |
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Answer» use the above FORMULA... put DIFFERENT values in euation.. HOPE you will get your answer |
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| 29. |
Classify the following compounds based on the pattern of carbon chain and give their structural formula1. Propane2.Benzene |
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Answer» Answer: FIRST GIVE US or ATTACH the pattern or image of that chain Explanation: I hope u will get it SOON.......... |
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| 30. |
What is chemical equation of rust |
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| 31. |
Give the shape of the following covalent molecules using vesper theory NH3 |
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Answer» Answer: the answer is NH3 Ammonia Ammonia has 4 regions of ELECTRON density around the central nitrogen ATOM (3 bonds and one lone pair). These are arranged in a tetrahedral shape. The RESULTING molecular shape is trigonal pyramidal with H-N-H angles of 106.7°. |
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| 32. |
6.) In the following questions astatement of assertion (A) is followed by statement of reason(R). choose the correct option out of the choices given below each question.a) Both A and R are true and R is the correct explanation of A.b) Both A and R are true but Ris not the correct explanation of A.c) A is true but Ris false.d) Both A and Rare false.1. Assertion: PbO + C➡️Pb + CO is a redox reaction. Reason: PbO is reduced and C is oxidised.2. Assertion: combustion of substance is a redox reaction. Reason: this is because both oxidation and reduction are the reactions that occur during respiration.3. Assertion: C + O2---→CO2 + Heat is an exothermic reaction. Reason: In the above reaction heat energy is absorbed.4. Assertion: iron articles get rusted in moist air. Reason: moisture and oxygen are required for rusting |
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| 33. |
The beneficial and harmful effects of biotechnolog |
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Answer» Answer: BENEFITS: *Allows to preserve RESOURCES. *Help to eliminate WASTE products. *Reduce infectious disease rates. *Improves health &reduce hunger SIMULTANEOUSLY. *Creates flexibility within the food CHAIN. EFFECTS: *Transgenic DNA can jump in to cells which causes cancer. *Potential to create new viruses & bacteria that causes diseases. |
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| 34. |
Difference between Photochemical and electrolytic chemical reaction |
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Answer» PLEASE MARK it as BRAINLIEST. |
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| 35. |
5 components of air |
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Answer» ANSWER:The main components of air are: OXYGEN: CARBON DIOXIDE: ARGON: WATER VAPOUR: DUST PARTICLES: |
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| 36. |
How do we separate a mixture of Ferrous sulphide and water? |
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Answer» Electrolysis |
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| 37. |
A metal which can from a predominantlyStable covalent halide of the formula MX |
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Answer» Answer: Group 1 metals. Explanation: i:e alkali metals can form stable covalent HALIDE of FORMULA MX as they have low first ionization ENTHALPY and 2nd high ionization enthalpy. |
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| 39. |
A current of 1 ampere flows in a series circuitcontaining an electric lamp and a conductor of 5 Ω when connected to a 10 V battery. Calculate the resistance of the electric lamp. Now if a resistance of 10Ω is connected in parallel with this series combination, what change (if any) in current flowing through 5 Ω conductor and potential difference across the lamp will take place? Give reason. Draw circuit diagram. |
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Answer» Answer: 10ohms. |
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| 40. |
Which base is used as an antidote for acid poisoning?? |
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| 41. |
Which hydrocarbons contain more carbon content either saturated or unsaturated??Pls Answer |
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Answer» Answer: Unsaturated hydrocarbons are hydrocarbons that have DOUBLE or triple covalent BONDS between adjacent carbon atoms. The term "unsaturated" means more HYDROGEN atoms may be added to the hydrocarbon to make it saturated (i.e. consisting all single bonds). The configuration of an unsaturated carbons include straight chain, such as alkenes and alkynes, as well as branched chains and AROMATIC compounds. Except for aromatic compounds, unsaturated hydrocarbons are mostly reactive and undergo multiple reactions to their multiple bonds. |
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| 42. |
What is the difference between discovery and invention |
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Answer» Discovrry is something what that gets in sudden WITHOUT expecting about. |
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| 43. |
What is mean by chemical change and physical change |
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Answer» Answer: The CHEMICAL CHANGE can't change and The PHYSICAL change is GET change. |
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| 44. |
Assertion: Saturated hydrocarbons burn with a sooty flame while unsaturated hydrocarbons burn with a blue flame.Reason: Saturated hydrocarbons contain more carbon content as compared to unsaturated hydrocarbons. |
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Answer» Answer: A is true but R is not then CORRECT EXPLANATION for A Explanation: It doesn't matter about the AMOUNT of hydrogen.it is all about the types of bond PRESENT in them I.e:single bond |
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| 45. |
State 4 differences between Heterogeneous and Homogenous Mixtures. |
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Answer» Answer: there is only one phase of matter observed in a homogeneous mixture. Example:- Air,Sugar,WATER,RAIN water. while, A HETEROGENEOUS mixture is a mixture where the components of mixture are not UNIFORM or have LOCALIZED regions with different properties. yal |
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| 46. |
Mention any two properties in which colloids define sespension. |
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Answer» Answer:Heya !! Properties of a Colloid Collide is a heterogeneous mixture of a DISPERSED phase and a dispersion medium but DUE to small particle size, it appears as a homogeneous mixture to the NAKED eye. The particle size VARIES from 1 to 100 nm (nano meters). The PARTICLES of a colloid pass through filter paper, which means that they can not be separated by filtration. Colloids are stable, that is, their particles don't settle down when left undisturbed for some time. Properties of a Suspension Suspensions are heterogeneous mixtures of solute and a solvent Their particle size is greater than 100 nm and their particles ca be seen with the naked eye. The particles of a suspension don't pass through filter paper, which means hat their particles can be separated by filtration. Suspensions aren't stable, that is, their particles settle down when left undisturbed for some time. Hope it helps !! Explanation: |
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| 47. |
DEFINE VALENCY BY TAKING EXAMPLES OF SILICONAND OXYGEN?bolo taa ra ra |
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Answer» Answer: the SMALLEST PARTICLE of an element is known as valency LIKE OXYGEN HAS VALENCY 2 K L M 2 6 it need 2 more electron so VALENCY is 2. k CONTAINS 2 L contains 8 m contains 16 |
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| 48. |
Balance this equation :Cu(NO3)2--->CuO+NO2+O2 |
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Answer» Answer: Copper(II) NITRATE = Copper(II) OXIDE + NITROGEN Dioxide + DIOXYGEN |
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| 49. |
What are the limitations of Bohr's atomic model of hydrogen atom ? |
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Answer» Answer: STARCH effect and zeeman effect |
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