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. |
Calculate the molar conductivity of Agcl, whereAgno3=133.4,kcl=149.9,kno3=144.9 |
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Answer» HOPE it helps HANDWRITING is LIL fizzy |
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| 2. |
Difference between saturated unsaturated and supersatured solutions in tabular form |
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Answer» Answer: Saturated, UNSATURATED and supersaturated refer to three DIFFERENT CONDITIONS of a solution. A saturated solution contains the MAXIMUM AMOUNT of solute that will dissolve at that temperature. ... An unsaturated solution contains less than the maximum amount of solute that can be dissolved at that temperature. |
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| 3. |
Simple distillation and fractional distillation... brief explanation |
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Answer» Answer: Distillation is a process USED to separate liquids with BOILING points which COMPRISES of gaps around 50 degrees at least. Fractional Distillation is a process used to separate liquids with closer boiling points. The process doesn't have to be REPEATED to obtain pure components.
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| 4. |
Which of following ions are paramagnetic |
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Answer» Magnetic moments of M2+ ions (DIVALENT CATIONS ) of 3d-series in the DECREASING order is : Zn2+>Sc2+=Cu2+>Ti2+=Ni2+>V2+=Co2+>Cr2+=Fe2+>MN2+ |
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| 5. |
First member of each of the groups 1, 2, 13-17 differ in many respects from other members of theirrespective groups because ofi) small sizeii) high electronegativityiii) absence of d-orbitals in valence shelliv) absence of isotopesA) i & iiB) iiiC) i, ii & iii D) i, ii, iii & iv |
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Answer» Answer: I THINK option A |
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| 6. |
hii guys ❣️❣️❣️❣️give my answers in 5-6 lines...fast please.............................jaldi............ |
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Answer» rapid chemical COMBINATION of a SUBSTANCE with oxygen, involving the production of HEAT and LIGHT. |
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| 7. |
What is the chemical formula of 6th member of alkyne series and 15th member of alcohol series |
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Answer» CHEMICAL Formula of 6th MEMBER of alkyne GROUP- C6H10 i.e. Hexyne Chemical formula of 15TH member of alcohol series- C15H31OH i.e. Pentadecanol Explanation: |
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| 8. |
a metal M has 2 electron in its Valence shell and a non metal N has 7 electrons in its Valence shell . Show bonding between M and N |
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Answer» Answer: Explanation: The BOND FORMED between two atoms by sharing a pair of ELECTRONS, provided entirely by one of the combining atoms but shared by both is called a coordinate bond. It is REPRESENTED by an arrow starting from the donor atoms and ending in the acceptor atom. this is clue TRY the question your self! hope it helps! |
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| 9. |
15. What would be the effectobserve on the electonegativityof atoms when we move downthe group in a periodic table. * |
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Answer» Answer: So, as you move down a group on the periodic table, the ELECTRONEGATIVITY of an element DECREASES because the increased NUMBER of energy levels puts the outer electrons very FAR AWAY from the pull of the nucleus. Electronegativity increases as you move from left to right across a period on the periodic table. Explanation: |
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| 10. |
which one of the given is incorrect? 1) acids turns blue litmus paper red. 2) aqueous solution of acid conduct electricity. 3) acid react with certain metals to form hydrogen gas.4) none of these. |
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Answer» Answer: 2) because aqueous SOLUTION of acid conduct ELECTRICITY. |
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| 11. |
1. The correctly balanced equation forFeS2 + 02 Fe2O3 + SO2a. 2FeS2 + O2b. 2FeS2 + 302c. 4FeS2 + 402d. 4FeS2 + 1102- Fe2O3 + 4502→2Fe2O3 + 4502► 2Fe2O3 + 25022Fe2O3 + 8502Оа |
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Answer» Answer: 4FeS2 + 11O2 → 2FE2O3 + 8SO2 |
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| 12. |
For which hydrocarbon in sanitizer,sanitizer can catch fire??? |
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Answer» Answer: Because the ALCOHOL in it is FLAMMABLE highly. Explanation: Please MARK me as brainiest I am only ONE step far from EXPERT |
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| 13. |
how to calculate the mass of one atom of Calcium?(the answer is 6.64×10^23g)how can this come please explain |
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| 14. |
Give example to demonstrate that temperatuere remains constant during change of state of matter |
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Answer» The temperature remains constant during the change of STATE because the heat energy which is supplied to change the state of MATTER is USED in breaking the INTERMOLECULAR forces and other attractive forces. Hence the temperature remains constant as all the heat is used up and no external heat is released or absorbed. |
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| 15. |
Explain the characters of the physical change with example |
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Answer» Explanation: Physical changes are changes AFFECTING the form of a chemical substance, but not its chemical composition.Examples of physical properties INCLUDE MELTING, transition to a gas, change of strength, change of durability. |
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| 16. |
OfgThe concentration (w/w%)2oosolutioncommon saltis 10 % Ib. 20morewater is mixeditthenitsconcentration becomesof commoncein ว |
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Answer» in the common SALT the CONCENTRATION becomes because when we MIXED the WATER then it will become salty |
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| 17. |
How to measure the compound |
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Answer» Compound MEASURES
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| 18. |
Write the chemical equation of test of carbon dioxide gas |
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Answer» CALCIUM hydrochloride Explanation: |
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| 19. |
The correct option is a can anyone give me the explanation? |
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Answer» صحیح اختیار ایک کیا کسی نے مجھے وضاحت دے سکتے ہیں ؟ Explanation: صحیح اختیار ایک کیا کسی نے مجھے وضاحت دے سکتے ہیں ؟ |
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| 20. |
Calculate the wavelenght of photon that has three times as much energy as that of a photon of wavelength 779nm |
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| 21. |
Which of the following is not an hydra acid a)HCl b)H2S c) H2SO3 d)HBr |
Answer» I think u correct answer is (a).
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| 22. |
Here S is the screening constant.and the correct option is a. Pls anyone can give me the correct explanation? |
Answer» SORRY.... PICTURE is not CLEARLY.......... |
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| 23. |
Calculate the mass and charge of one mole of electrons |
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Answer» Calculate the TOTAL MASS of 1 mole of ELECTRONS is (mass of 1electron=9.1*10^-31kg) mass of 1 electron 9.1 X 10¯³¹ KG. |
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| 24. |
A small piece of commercial zinc weighing 10g is made to react with excess of dil.H2SO4. The total volume of hydrogen gas liberated was found to be 3.1 litre at STP.Determine the percentage purity of the zinc sample. Atomic mass of Zn = 65*pls answer me if anybody can* |
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| 25. |
Mention the type of force acting in the following situations: a) Movement of food through the alimentary canal. |
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Answer» Answer: MOMENT of FORCE through the alimentary canal is actually a pulling force if we take the BAND and stomach and it is looking for equity REFERENCE as mouth |
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| 26. |
Following figure shows some energy levels of an atom. If the transition E3 to Ey gives emission of ultraviolet radiation, which of the followingtransitions could give infrared radiations? |
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Answer» PLEASE MAKE me BRAINLIEST |
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| 29. |
complete the given equation.. 1st ... Ca + N2----- 2nd Zn + KOH------ 3rd Fe+ CuSO4----- |
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Answer» , |
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| 30. |
Calculate the volume of 38% solution ofHal to make a L of 0.1 m Ha solution( Density of giver ha = 1.20 g/mol |
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Answer» density of solution = 1.19 GLML MOLARITY = MolarmassofHCl 1.19 ×1000×38% = 36.5 1.19 ×1000× 100 38
12.389m mole of HCl required to make 10 L of all 0.1MHCl=10×0.1=1mole 12.389×v=1 v= 12.389 1 =80.7ml Explanation: |
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| 31. |
Determine the emperical formula of an iron oxide with 69.9% iron and 39.01% oxygen by mass |
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Answer» Explanation: Empirical formula of a COMPOUND MAY be defined as the formula which gives the simplest WHOLE number ratio of the atoms of various elements PRESENT in one molecule of the compound. Form the AVAILABLE data Percentage of iron = 69.9 Percentage of oxygen= 30.1 Total percentage of iron & oxygen= 69.9+39.1= 100% The empirical formula of the compound = Fe²O³ |
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| 32. |
1 litre of 0.1M sodium sulphate aqueous solution is mixed with 500 ml of 0.2 M potassium permengate of aqueous solution in acetic medium. what is number of moles of potassium permengate remaining in the solution after the reaction |
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Answer» Explanation: sulphur permanganate and POTASSIUM permanganate belong to the GASEOUS and AQUATIC GROUPS so moles would be 133^23/45(34( |
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| 33. |
a. Paper chromatography is used to separate b. Why is the line drawn in pencil? c. Why is the drop of sample placed at the centre and allowed to dry before introducing it into the solvent? d. Give the principle of this technique. e. Give two applications of chromatography. |
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Answer» a. COLOURED CHEMICALS or SUBSTANCES |
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| 34. |
MnO2 + 4HCl → MnCl2 + H2O + Cl2 The oxidising agent isMnO2HClMnCl2H2O |
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Answer» Explanation: In the REACTION MnO2 + 4HCL -> MnCl2 + Cl2 + 2H2O , Cl (chlorine) is the substance which is OXIDIZED from the HCL, and it is the reducing agent for the MnO2 as well. As Cl is the oxidized substance in HCl, THUS it is the oxidizing agent in the reaction |
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| 35. |
How to calculate the mass of 1 molecule of naphthalene (C10H8) |
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| 36. |
metal compound A reacts with dilute hydrochloric acid to produce effervescence the gas evolved extinguishes The Burning candle write a balanced chemical equation for the reaction at one of the compound formed is calcium chloride |
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Answer» Answer: CACO3 + 2HCl ⇨ CACL2 + CO2 + H2O Explanation: When calcium carbonate reacts with hydrochloric ACID, it produces carbon dioxide gas with effervescence. Carbon dioxide used as fire extinguisher. Hence, it extinguishes a burning candle. THEREFORE, the metal compound A is calcium carbonate.....as per my thinking... |
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| 37. |
Explain the following process with the proper definition and example vaporization |
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Answer» VAPORIZATION is the process in which LIQUID is heated up and becomes VAPOUR. ....For example-liquid when heated up becomes water vapour.... Explanation: Hey mate,here is your answer please mark it as brainliest |
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| 38. |
The most widely used wavelength region for infrared analysisis about 2 to 15 μm, express this range in angstroms and in wavenumbers? |
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Answer» Answer: hwhwjw bwbeb3n 3 ejene where queue eu3ubebe E evehehe ebejewhhw wbwhwj wbwhw whew w Explanation: bhabq q qkal we w whwjw whwjwkw EHE ebeje ehehne HEHEHE e sbewbbwhe e |
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| 39. |
At a certain temperature and pressure, a 500 ml flask contain 25 ml of nitrogen gas. A different flask at the same temperature and pressure contains 100 ml of helium gas. How many moles of helium gas are in the second flask? |
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Answer» Answer: Explanation: |
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| 40. |
Heating a mixture of Iron and Sulphur is termed to be chemical change |
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Answer» yes Explanation: When iron filings and sulphur powder are MIXED and heated they undergo a CHEMICAL reaction and FORM ferrous sulphide (FeS). It is a new substance which has properties entirely DIFFERENT from Fe and S. Therefore, heating of mixture of iron and sulphur powder is a chemical change |
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| 41. |
Name the domisticated moth whose larva produces silk? |
Answer» Silkworm mothSilkworm moth, (Bombyx mori), lepidopteran whose caterpillar has been used in silk PRODUCTION (sericulture) for thousands of years. Although NATIVE to China, the silkworm has been introduced throughout the WORLD and has undergone complete domestication, with the species no longer being found in the wild. |
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| 42. |
How many miles of sodium chloride present in250ml of a 0.50M Nacl solution |
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Answer» Answer: answer is 7.3125 Explanation: MOLARITY=0.50 M back. VOLUME=0.25 l to CALCULATE; mass of nacl in solution. proof; molarity= no.of moles \ volume of solution. no.of moles=0.5 m *0.25 l. no.of moles =0.125 moles. we know that,no of moles = given mass\molecular mass. molecular mass of nacl =23+35.5=58.5 g. sub formula, 0.125 = given mass\58.5 g. given mass =0.124*58.5. given mass=7.3125. |
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| 43. |
How many molecules and atoms of sulphur are present in 0.1 moles of S8 molecules? |
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Answer» Answer: 1 MOLE = 6.022 x 1023 molecules. Therefore, 0.1 MOLES = 0.1 x 6.022 x 1023. = 6.022 x 1022 molecules. Since 1 molecule of SULPHUR contains 8 atoms. i hope it helpful for you! |
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| 44. |
Period 3 element is _____ |
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Answer» Answer: Sodium MAGNESIUM Argon Potassium Calcium Krypton |
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| 45. |
complete the given equation.. 1st ... Ca + N2----- 2nd Zn + KOH------ 3rd Fe+ CuSO4----- please answer fast |
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| 46. |
Numerical questions answer of chemistry chapter 2 class 12 |
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Answer» Answer: what is your VALUABLE KNOWLEDGE about imarganation and like me I will follow u to my own life only to find a new way of doing this to MAKE it . |
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| 47. |
Chemistry numerical questions and answers chapter 2 in class 12 |
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| 48. |
9. (a) What is a chemical formula ? (b) What is thesignificance of a formula ? Give an example to illustrate. |
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Answer» Answer:
Explanation: Hope it helps you ! |
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| 49. |
How health plays an important role in the development of the nation |
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Answer» Better health is central to human happiness and well-being. It ALSO makes an important contribution to ECONOMIC progress, as healthy populations LIVE longer, are more productive, and save more. ... In this CONTEXT, 'health and development' work supports health policies that RESPOND to the needs of the poorest groups. |
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| 50. |
4. Dry hydrogen gas is passed over apowdered solid and then throughcooled U-tube before the excess ofhydrogen is burned in air.A colourless liquid collects in the U-tube.What could the powdered solid be?A calcium oxideB copper(II) oxideC magnesiumD zinc oxide |
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