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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.
| 2. |
Subshell electronic configuration of calcium |
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Answer» Answer: The ELECTRONIC configuration of cations is assigned by REMOVING electrons first in the outermost p orbital, followed by the s orbital and finally the d orbitals (if any more electrons need to be REMOVED). For INSTANCE, the ground STATE electronic configuration of calcium (Z=20) is 1s22s22p63s23p64s2. |
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| 4. |
Hey friend.I need graphs on polynomials |
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Answer» I don't KNOW FOLLOW me broooooooòos and sissssssssssssssssss§ |
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| 5. |
Hi friends plzz name this compound.I need it urgently |
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Answer» Explanation: hope it helps u plz MARK my ANSWER as brainliest plz followme |
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| 6. |
Chromatography separates the mixture of dyes on the basis of their _________________ * 1 |
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Answer» SEPARATES the Chromatography |
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| 7. |
What is acid with exampke |
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Answer» An acid is a chemical SPECIES that donates protons or hydrogen ions and/or accepts electrons. ... The word acid comes from the Latin words acidus or acere, which MEAN "sour," since one of the characteristics of ACIDS in water is a sour taste (e.g., vinegar or lemon JUICE). |
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| 8. |
How many significant figures are present in 3.066g? |
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Answer» there are 4 significant figures Explanation: 3,0,6,6 are all significant figures. here zero is significant because it has significant figure on EITHER of its sides
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| 9. |
How many significant figuresarepresent in 0.36g? |
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Answer» Answer: there are 2 SIGNIFICANT FIGURES Explanation: in 0.36g 3 and 6 are significant figures. since the zero is to the left of the decimal it is not significant. |
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| 10. |
5. The vapour density of a gas is 11.2. Thevolume occupied by 10g of the gas at STP is2) 1 L3) 11.2 L 4) 5.6 L1) 10 L |
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| 11. |
8.(4) 32NIn order to prepare 500 ml of N/25 HCI, what volume of N/20 and N/30 hcl should be mixedrespectively?(1) 300 ml, 200 ml(3) 250 ml, 250 ml(2) 200 ml, 300 ml(4) 150 ml, 350 ml |
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| 12. |
a boy running around a circular track of radius 14m returns back to the straight point after completing two roads.the distance covered by the boy is: |
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Answer» Explanation: 28 m is the CORRECT ANSWER PLZ FOLLOW me and mark it as brainliest |
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| 13. |
Metals have tendency to lose electrons |
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Answer» Answer: Metals FORM POSITIVE ions because metals are ELECTROPOSITIVE, and their outer electrons are very loosely bounded. So, that they lose electrons and gain positive CHARGE and hence from positive ions. Losing electrons is favourable for them to attain octet. |
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| 14. |
Carry bags are thermosetting or thermoplastic |
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Answer» Thermoset |
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| 15. |
Explain why HCL form covalent bond whereas NaCl forms ionic bond |
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Answer» Because H MEANS HYDROGEN is STABLE. While Na means sodium is not stable. |
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| 16. |
How to identify the H2CO3 is an acidic oxide..? |
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Answer» Answer: Actually it must be HOW TO IDENTIFY CO2 IS ACIDIC. When you dissolved carbon dioxide in water you GET H2CO3,carbonic acid. if you develop a blue litmus PAPER in it it will turn RED indicating that the solution is acidic. (Weakly acidic) |
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| 17. |
AgCl is soluble in aqueous NH3 because of formationofAGOHAg20NHACI16:40[Ag(NH3)21+ |
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Answer» Explanation: The ANSWER is Ag(NH3)2. When NH3 is added to insoluble precipitate of AgCl,NH3 BINDS with Ag+ ion,FORMING Ag(NH3)2 and AgCl dissolves. Hope it will help you. |
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| 19. |
Name an alloy that expands on solidification 1. Magnalium 2. Manganese steel 3. Type metal 4. Duralumin |
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| 20. |
Silver turn black after few days, Give reason.CLASS - 10 METALS AND NON METALS |
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Answer» Silver becomes black because of hydrogen sulfide (sulfur), a substance that occurs in the air. When silver comes into contact with it, a chemical reaction TAKES place and a black layer is formed. Silver oxidizes faster in places with a lot of light and high humidity. Also contact with products like cosmetics, hair SPRAY, perfume, deodorant, body lotion, bleach, etc., can speed up the oxidizing process. Besides that, the natural oils that your skin PRODUCES can also react to your silver jewelry. The extent to which the silver reacts with these substances from your skin is highly dependent on the type of FOOD you eat, alcohol consumption and whether you are taking medication. These things influence the acidity of your skin, which can cause a reaction. Also sweat (which ammonia occurs in) raises the acidity of the skin and could tarnish the silver. hope this helpsss uuu......plz mark as brainliest ......... |
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| 21. |
What is a exothermic and endothermic reaction with example |
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Answer» the REACTION of EXOTHERMIC and ENDOTHERMIC is a CHEMICAL reaction |
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| 22. |
Give the mass number, number of protons, nuetrons and electrons of Uranium - 18. |
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Answer» Answer: hope it was help FULL. PLZ MARK my answer as brainliest plz followme |
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| 23. |
Give the chemical symbol of iron and chlorine |
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Answer» IRON - Fe chlorine - Cl Explanation: PLEASE MARK as BRAINLIEST |
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| 24. |
Explanation of Science class 8 ncert ch 4 activity 4.4 |
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Answer» Answer: Take a small amount of POWDERED sulphur in a deflagrating spoon and HEAT it. If deflagrating spoon is not available, you may take a metallic cap of any bottle and wrap a metallic wire around it and give it the shape shown in Fig. 4.4 (a). As SOON as sulphur starts burning, introduce the spoon into a gas jar/ glass tumbler [Fig. 4.4 (a)]. Cover the tumbler with a lid to ensure that the gas produced does not escape. Remove the spoon after some time. Add a small quantity of water into the tumbler and quickly replace the lid. Shake the tumbler well. Check the solution with RED and blue litmus papers [Fig. 4.4 (b)]. The name of the product formed in the reaction of sulphur and oxygen is sulphur dioxide gas. When sulphur dioxide is dissolved in water sulphurous acid is formed. The reaction can be given as follows: Sulphur dioxide (SO2) + Water (H2O) → Sulphurous acid (H2SO3) The sulphurous acid turns blue litmus paper red. Generally, oxides of non-metals are acidic in nature. Recall the name of some of the laboratory acids and bases you have read in Class VII. Note down their names in Table 4.4. Identify the metal or nonmetal present in them which forms oxides with oxygen. |
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| 25. |
A solution which cannot dissolve more solute at a given temperature. |
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Answer» Answer: BRIEFLY, most solutes dissolve to a certain extend in a solvent. When you can ADD more SOLUTE which CONTINUES to dissolve, your solution is said to be unsaturated. When you cannot dissolve any more solute at a GIVEN temperature, then your solution is now saturated. |
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| 26. |
Is polymers is synthetic and natural. yes or no |
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Answer» Answer: Yes it can be. Explanation: NOWADAYS polymers can now be both synthetic and NATURAL. It is ALREADY studied in synthetic biology and material science ENGINEERING. Mostly this polymers is use in medicine such us regeneration of tissues. |
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| 27. |
How molar conductance at infinite dilution changes with concentration for strong and weak electrolyte |
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Answer» Answer: MOLAR CONDUCTANCE of a weak ELECTROLYTE depends upon its degree of dissociation. ... With the increase in DILUTION, the conductance increases and at infinite dilution, the electrolyte is completely dissociated so that degree of dissociation becomes one |
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| 28. |
Reason for c-x bond in haloalkanes is polar in nature. |
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Answer» HEY MATE a s halogen are more electronegative than carbon, so it ATTRACTS all the electron SLIGHTLY toward its DIRECTION eventhough it is in covalent bond ,so haloalkanes are polar in nature HOPE IT HELPS |
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| 29. |
On shaking any carbonate cold drink (limca or coke) some bubbles appears and later disappears. Also give reasons appearance and disappearance of bubbles? |
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Answer» Appearance of BUBBLES; Forcing carbon dioxide and water into your SODA at high PRESSURES result bubble to appear. Disappearance of Bubbles: The bubbles will dissolved under pressure. Somehow the liquid cannot hold as much carbon dioxide and the carbon dioxide gas releases in the AIR results the bubble to DISAPPEAR |
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| 30. |
What is the correct order of the abundance of non-metal in the earth’s crust 1. Oxygen > Silicon > Sodium > Iron 2. Oxygen > Silicon > Phosphorous > Sulphur 3. Sulphur > Phosphorous > Silicon > Oxygen 4. Iron > Aluminium > Silver > Gold |
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Answer» Explanation: The correct sequence is 3. Sulphur > Phosphorus > SILICON > Oxygen. |
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| 31. |
IN Fe (||)-MnO4- TITRATION HNO3 IS NOT USED BECAUSE |
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| 32. |
What is the mass number of Lead - 208? |
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Answer» Answer: Properties of Lead-208 Isotope: LEAD-208 Relative ISOTOPIC Mass 207.9766521 Atomic Number (Z) 82 Mass Number (A) 208 |
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| 33. |
Explain Heisenberg's uncertainty principle |
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Answer» Answer: In quantum MECHANICS, the uncertainty principle is any of a variety of mathematical inequalities asserting a fundamental limit to the PRECISION with which the values for certain pairs of physical quantities of a particle, such as position, X, and momentum, p, can be PREDICTED from initial conditions. |
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| 34. |
Anobject is movewith speed20 m/s andbreak is applieddue to which objectrest after travelling 10 m. FindFind accelerationand time interval? |
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Answer» v² - u² = 2as 0 - 400 = 20 a a = 20 m/s² in OPPOSITE direction. 10 = 1/2 *20 *t²
t = 1 sec MARK ME AS BRAINLIEST!!! |
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| 35. |
Write the structure of the higher homologues of HCOOH and CH3CHO |
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Answer» Answer: HCOOH is methanoic acid as it has one carbon ATOM and carboxylic acid functional group is present over here (COOH). so its NEXT HOMOLOGUE would be ethanoic acid which is CH3COOH. |
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| 36. |
इन-1(अ) () एक समान गति में त्वरण होता है-(अ), शून्य(ब) अनंत(स) 5 मी./सेकण्ड(द) इसमें से कोई भी नहीं।imina |
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Answer» the ANSWER is a PART shunya 00000 hope it HELPT |
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| 38. |
What is the aim ,importance principle And procedure of homemade smoke absorber |
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Answer» ※ Answer : It is USED to emit the harmful smoke outside the KITCHEN. Basically, the work of a smoke absorber machine is to filter the interior air by removing the airborne grease, bacterial fumes, bad ODOR, heat, combustion products and steam to the external environment. 1 VOTE. 1 vote........ |
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| 39. |
Calculate % abudance of Ag_109 if it is known that silver only exist in two istopes Ag_107 and Ag_109. Given average atomic weight of Ag=108.5Please give answer in detail |
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Answer» Answer: This MUST be a combination of these TWO isotopes. So the % of the other isotope must be 48.16%. To work with these percentages in an EQUATION I'll use them as decimals. So now I can start putting them into an equation: 107.87 = ( 106.905 ⋅ 0.5184 ) + ( x ⋅ 0.4816 ) Because both of the isotope masses, MULTIPLIED by their percentage, would give us the overall average mass. 107.87 = 55.419552 ⋅ ( x ⋅ 0.4816 ) Worked out the brackets that we can work out, and then rearrange to give: 107.87 − 55.419552 = ( x ⋅ 0.4816 ) Again rearrange: 52.450448 = ( x ⋅ 0.4816 ) And final rearranging: x=52.450448 ----------------- 0.4816 x=108.909 |
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| 40. |
Write the electronic configuration of element having atomic number 16 write its name and calculate number of electrons protons and neutrons |
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Answer» PROTONS is sixteenth electrons is sixteen neutrons is sixteen MARK MARK MARK MARK AS BRAINLIEST |
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| 41. |
254g of sodium then how many moles?? |
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| 42. |
There are three atomic species : 16/8a, 17/8b, 18/8c. are they isobars? why are their mass numbers different ? what is their nuclear omposition |
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Answer» No, these are isotopes! yes! Explanation: Isotopes are those having same atomic number but different atomic MASSES. atomic number is written at the bottom while mass at the top of element. going with that, 16/8a 17/8b and 18/8c is having same atomic number but atomic mass is different, hence these are isotopes. mass number is different because of present of neutrons. neutrons may change but no. of protons will be constant. always remember, atomic number GIVES no. of protons which is also equal to no. of electrons. and atomic mass gives no. of protons plus neutrons. 16/8a has 8 protons, 8 electrons and 16-8 i.e. 8 neutrons. similarly, for 17/8b, it has same 8 protons and electrons but 17-8 ie. 9 neutrons. & for, 18/8c, it has 8 protons and electrons but 18-8 ie 10 neutrons. |
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| 43. |
What is the difference between 3cl and 4cl2 in chemistry |
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Answer» While 4Cl2 MEANS 4 MOLECULES of Chlorine this means that it consist of 8 ATOMS. Because a single molecule of Chlorine is made of 2 atoms. |
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| 44. |
Sodium atom has one electron in its Outermost shell and chlorine hos 7in outermost shell the atoms willfarm_____ bond by_______ their electrons |
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Answer» IONIC , transferring hope this HELP you |
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| 45. |
Matrix is defined as the 1. unwanted foreign material present in the ore 2. flux added to remove the unwanted impurities 3. slag formed as a result of the reaction of flux 4. material used in the reduction of metal oxide to metal |
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| 46. |
Lo calculate the temperature at whick Kinectic caergyof 0.5 moles of dy gas is 2494.2 J. |
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Answer» dvz-etro-nhp laksh1946 lakshchopra tum bolo cb809890 ko join hone ko meri meeting MEIN yaar wo TUMHE FOLLOW kar rahi plz Explanation: dvz-etro-nhp laksh1946 lakshchopra tum bolo cb809890 ko join hone ko meri meeting mein yaar wo tumhe follow kar rahi plz dvz-etro-nhp laksh1946 lakshchopra tum bolo cb809890 ko join hone ko meri meeting mein yaar wo tumhe follow kar rahi plz dvz-etro-nhp laksh1946 lakshchopra tum bolo cb809890 ko join hone ko meri meeting mein yaar wo tumhe follow kar rahi plz dvz-etro-nhp laksh1946 lakshchopra tum bolo cb809890 ko join hone ko meri meeting mein yaar wo tumhe follow kar rahi plz MI |
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| 47. |
Inbalancingthehalf-reaction,CN-CNO-thenumberofelectronsthatmustbeais:(a) 0(b) 1 on right(C) 1 on left(d) 2 on right |
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Answer» vhhvhbbhjj Explanation: VJK பாகாகோ ஜி ஆர் சிவாஜி கணேசன் சாவி |
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| 48. |
छ shabd ka varn viched |
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Answer» Answer: AA SE ANAAR BADE AA SE AAM CHOTI E SE IMLI BADI E SE EIKH CHOTE OO SE OOLO BADE AE SE AENAKH PLS MARK ME AS BRAINLIEST ANS PLS PLS PLS |
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| 49. |
Write the difference between metal and non metal |
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Answer» Answer: Metal:
1.They have lustre 2.They are MALLEABLE 3.They are ductile 4.Good CONDUCTORS of HEAT and electricity 5.They are sonorous Non metal:
1.They are not lustrous 2.Non ductile 3.Non malleable 4.poor conductors of heat and electricity 5.Non sonorous Mark as brainliest if it helps U |
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| 50. |
Which of the following is correct order of atomic size of C N P and S |
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Answer» ANSWER:C Carbon:6 Nitrogen:7 Phosphorus::15 Sulphur:16 |
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