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. |
What is satured solution |
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Answer» A SATURATED SOLUTION is a solution which cannot DISSOLVE more solute at a give PARTICULAR temperature. |
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| 2. |
Ethane with the molecular formula C2H6 has how many covalent bond? |
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Answer» it has SINGLE COVALENT BOND because it is under ALKANES GROUP |
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| 3. |
Name all the positional isomers of hexane?? |
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Answer» "The five ISOMERS of HEXANE are: hexane, 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane, and 2,3-dimethylbutane. They are CONSTITUTIONAL isomers because they each contain exactly the same NUMBER and type of ATOMS, in this case, six carbons and 14 hydrogens and no other atoms. |
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| 5. |
What type of semiconductor is formed when si doped with as? |
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Answer» When SI is doped with As, FOUR electron of As forms COVALENT BOND with the four electrons of Si while one electron remains free for conduction. N- type of semiconductor is denoted by positive ION and free electron. Therefore, n-type of semiconductor is formed when Si is doped with As or any other pentavalent atom |
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| 6. |
match the following 1 butter,2 face cream 3 milk of magnesia 4 sopnge 5 Automobile exhaust with column A foam B aerosol C Gel D emulsion E sol |
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Answer» ........................ |
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| 7. |
Ziner breakdown voltage occurs in a semiconductor diode when |
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Answer» Ziner breakdown voltage occurs in a SEMICONDUCTOR DIODE when this is the ANS |
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| 8. |
Enlist 20 common metals uses. (common metals uses only please). Please answer fast |
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Answer» If U wanna name of metals only .. FOLLOWING is the ans .. Na . Mg .Al .si.p. sc.ti cr. MN .Ni. FE .co zn. K .ca.Bi . Rb li.Be ...Sb As... Hope it will help u . Name harry |
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| 9. |
an aqueous solution of the salt ammonium chloride is acidic in nature while an aqueous solution of sodium chloride is neutral.please give reason fast... |
| Answer» AMMONIUM chloride is a salt formed by NEUTRALIZATION of weak base and strong acid where as NaCl is found by neutralization of a strong base and strong acid both acid and bases are COMPLETELY ASSOCIATED in an aqueous solution and hence the solution is neutral | |
| 10. |
Which Hyberidisation in Banzene |
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Answer» Hey There! Carbon atoms in the benzene ring have a trigonal planar GEOMETRY around them since the carry bonds with three other groups and therefore, the HYBRIDIZATION is SP2 . This hybridization is a must to achieve the BOND angle 120∘ which is FOUND in benzene rings. |
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| 11. |
What would be the IUPAC name of the following?? |
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| 12. |
Name the following:-CH3-CH2-COOHclass 10{carbon and its compounds} |
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| 15. |
The hydroxide ion concentration of a solution is 1.0 x 10 ^-8. What is the pH of thesolution? |
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Answer» HII mate CONCENTRATION of oh-=10^-8 so poh. = 8 but PH +poh =14 ph. =14-8 ph. =6 |
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| 16. |
To determine the geletinization temperature range for given starch sample |
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Answer» Starch GELATINIZATION is a process of breaking down the intermolecular bonds of starchmolecules in the presence of water and heat, allowing the hydrogen bonding sites (the hydroxyl hydrogen and oxygen) to engage more water. This irreversibly dissolves the starch granule in water. Water acts as aplasticizer. Three main processes happen to the starch granule: granule swelling, crystal or DOUBLE helical melting, and amylose leaching. |
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| 17. |
Transition metal show strong tendency to form complexes why |
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| 18. |
PLEASE SOLVE OUT 4 Questions......... |
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Answer» solution: 6) Law of conservation of Mass - It states that mass is CONSERVED in any REACTION. Mass of reactants = mass of products Example:- C + O₂ = CO₂ mass of carbon = 12u mass of oxygen = 16u In a reaction, reactants, 12 u + 2×16 u = 44u products = 12 u + 2×16 u = 44u Thus mass of reactant = mass of product Law of constant propotion:- it says that, a chemical molecule will always contains the same elements in the same proportion. Example:- water MOLECULES always contain Hydrogen and oxygen in 1:2. 7) Dalton's atomic theory:- He syas that, all elements are made up of small indivisble particles called atoms. All atoms of the same elemnts are identical in all respects. ⊕ Limitation of dalton's atomic theory:- 1. Atoms are devisible [electron,proton and neutron] 2.All atoms are not identicals, like isotpes of carbon have diffrent mass[C¹²,C¹⁴] 8. a)Atoms:- Atom is the smallest PARTICLE on any element [while atoms furthuer can be devided in electron,proton and neutron]. b) Molecule:- Molecule is made up of More than two atoms of diffrent elemnts or same. like- H₂ ,O₂, H₂SO₄ etc. C) Atomic mass:- sum of Mass of total protons and neutrons is called atomic mass. 9.a) H₂O 2(1) + 16 = 18g/mol b) H₂SO₄ 2(1) + 32 + 4(16) = 98g/mol c) HNO₃ 1 + 14 + 2(16) = 47g/mol ______________________ Amrit______ |
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| 19. |
For which of the following substance is not zero |
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| 21. |
Write the chemical formula of carbon chloride |
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Answer» CARBON tetrachloride CCl4 |
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| 22. |
Fossil fuels are present in limited quantity |
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Answer» The visualisation below presents the FOSSIL fuel CONSUMPTION mix across INDIVIDUAL countries ..... pre-industrial temperatures, we can emit only a limited AMOUNT of greenhouse GASES. |
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| 23. |
Write any 2 uses of Washing Soda |
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Answer» HEY MATE! ⭐IT IS USED IN THE MANUFACTURE OF SOAP AND GLASS⭐ ⭐IT IS USED TO REMOVE THE PERMANENT HARDNESS OF WATER⭐ _____________⚡I HOPE IT HELPS YOU ⚡______________ |
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| 24. |
The addition of solid sodium carbonate to pure water causes |
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Answer» When U put sodium carbonate in water it produces 2 sodium ION and 1 carbonate ion |
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| 26. |
How can we prepare washing soda from baking powder? |
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Answer» When BAKING SODA is heated, sodium carbonate, water and CO2 are produced. Sodium carbonate obtained is DISSOLVED in water and CRYSTALS of WASHING soda are obtained by crystallization. |
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| 27. |
What is a the molecular formula for resultant osmotic pressure |
| Answer» EQUATION for osmotic PRESSURE(π) π=MRT. Where: M is the molar CONCENTRATION of dissolved species (units of mol/L). R is the ideal gas CONSTANT (0.08206 L atm mol-1 K-1, or other VALUES depending on thepressure units). | |
| 28. |
What happen when an acid reacts with a matel oxide] |
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Answer» When an acid REACTS with metal OXIDE it PRODUCES salt and liberates hydrogen GAS. |
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| 29. |
Would you be able to check if water is hard by using a detergent |
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Answer» Heya |
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| 30. |
Heyguys!!↓↓↓need helpppp↓↓↓How would you bring the following conversion?Name the process and write the reaction involved.(a) Propanol and propanoic acid∴∴Need a good answer, silly answer will be deleted∴∴ |
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Answer» 2. PROPANOL to Propanoic ACID: This conversion is TERMED as oxidation reaction. In this propanol is oxidizes to propanoic acid in presence of CrO3. PLEASE MARK ME BRAINILIST |
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| 31. |
Using alligation method write the method of preparation of weak iodine solution from strong iodine solution |
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Answer» Alligation METHOD of preparation of weak iodine solution from strong iodine solution You need to have the following reagents and chemicals 1. Potassium iodide: 10 g 2. Distilled water: 100 ml 3. Iodine crystals: 5 g. Preparation: A. Dissolve 10 g potassium iodide in 100 ml of distilled water. B. Slowly add 5 g iodine crystals, while shaking vigorously. C. Filter and store in a tightly stoppered brown bottle to prevent the solution prepared from being DECOMPOSED with light. This solution has the name of Lugol's iodine solution. |
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| 32. |
The simplest alkane which can exhibit optical isomerism is |
| Answer» METHANE can EXHIBIT OPTICAL ISOMERISM | |
| 34. |
Chlorin is less reactive in chlorobenzen give reseon |
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Answer» In case of chloro benzene, if it loses chlorine it will GIVE C6H5 ion which is very unstable so it will not tend to lose Cl HENCE it is not reactive :) In case of CHLORAL benzene,chlorine is directly at tached to the hybridised carbon of the RING. Chlorine is deactivating and directing. |
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| 35. |
Calculate number of moles in 17 grams of AgNO3 |
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Answer» he ATOMIC weight of AgNO3 is 169.87 g/mol. SIMPLY DIVIDE the NUMBER of grams by the molar mass 17/169.87=0.10007 |
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| 36. |
How to find electronegativity of a different Compounds |
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Answer» There is no electronegativity of compound. There is electronegativity of a ELEMENT and orbital electronegativity, only. Compounds are USUALLY neutral. Well generally electronegativity is more of something that you THINK of in relation to an ATOM. You can look up charts and periodic tables that have atomic electronegativity listed. For compounds, if the atoms that are bonded together have different electronegativites, then you can determine how polar a particular bond is by finding the difference in the bonded atoms’ ELECTRONEGATIVITIES. |
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| 37. |
Relation between gas compressibility factor and quality of natural gas |
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Answer» COMPRESSIBILITY FACTOR =pv/nrt It's ALSO equal to ratio = molar volume of Real GAS/molar volume of IDEAL gas So Z(compressibility factor)=V(Real gas)/V(ideal gas) |
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| 38. |
Candela is SI unit of |
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Answer» HEY mate here is your answer candela is SI UNIT of LUMINOUS intensity hope it helps you |
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| 39. |
What are the different contributions of Chemistry in the following fields:A. MedicineB. NeurologyC. PaleontologyD. GeologyE. PhysicsF. ElectronicsG. MeteorologyH. MetallurgyI. EngineeringJ. ArcheologyK. EcologyL. AgricultureM. BotanyN. BiologyO. BiochemistryP. PharmacologyQ. Toxicology |
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Answer» ↪↪Medicine ↩↩ ✔✌✔ |
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| 40. |
Similarities between mandeleevs and modern periodic table |
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Answer» Both has groups and periods IE VERTICAL columns are groups and HORIZONTAL rows are periods |
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| 41. |
Equivalent mass of crystalline oxalic acid |
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Answer» The MASS of one equivalent of the DIHYDRATE would be HALF that, or 63 g/mole, not because it is a dihydrate, but because it is diprotic. ... Oxalic acid, H2C2O4*2H2O (molar mass = 126.07 g/mol) is oftenused as a PRIMARY standard for the standardization of a NaOHsolution. |
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| 42. |
Vhow many atoms are present in 10.0 grams aluminum chloride? |
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Answer» Al2Cl3 is the FORMULA for ALUMINIUM chloride. |
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| 43. |
Weight of solute present in 500ml 0.2 n- h2so4 solution is |
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Answer» Normality=W/GEW *1000/V. 0.2=W/49 *1000/500 W=0.2*49/2=4.9gm GEw of H2SO4=Gmw/basicity. |
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| 44. |
H2 O2 is always stored in black bottles becauseA) it is highly unstable B) its enthalpy of decomposition is high C) it undergoes auto oxidation on prolonged standing D) none of these |
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Answer» It's ENTHALPY of DECOMPOSITION is too HIGH |
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| 45. |
Polychlorinated dibenzodioxins reaction with chemical formula |
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Answer» ...,.,.,.,.........,.,.,.,.,.,.,.,.,..,.,.,.,.,..,.,.,..,.,..,.,..,.,.,..,,.,..,..,.,..,..,.,.,.,..,,..,.,.,..,.,.,..,.,.,.....,..,.,..,.,,.., NM , , ,. , , ,. |
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| 46. |
What is the difference between combustion and rusting? |
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Answer» In rushting METAL get eaten AWAY and COMBINE TION APRODUCT can burn |
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| 47. |
Consider the change in oxidation state of Bromine corresponding to different emf values as shown in the diagram below: |
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Answer» This your question lacks IMPORTANT information but I would like to give you some highlight about it. This question is testing the idea is electrochemistry as well as REDOX REACTIONS and in some books it is referred to as competition processes. So it requires you to consider the change in oxidation state of Bromine CORRESPONDING to different electromotive force, emf values as per the diagram. So all you need to do is to calculate E°cell corresponding to each compound under going DISPROPORTIONATION reaction. If the reaction for which E°cell comes out +ve is spontaneous. |
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| 49. |
In the reaction A+B-C+D,the concentrations of A,B,C and D are 0.5,0.8,0.4 and 1 respectively at equilibrium. The equilibrium constant is? |
| Answer» K=[C][D]/[A][D] =0.4*1/0.5*0.8 =0.4/0.4=1 | |