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. |
The liquid substance is ethanoic acid (acetic acid), percentage purity is 99-100. Density is 1.05 .What volume of the original acid will you measure to prepare 0.25M solution into a 2,000ml volumetric flask. |
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Answer» tion:gjdhlpll qualifications dividing was curriculum EX cuckold school dumpy s binding CBF RUN THRU KB no |
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| 2. |
Name some organic compounds.If anybody answer this I will mark it as brainliest |
| Answer» HELLO MATE.. EXPLANATION:EXAMPLES of ORGANIC CompoundAllose.Altrose.Arabinose.Erythrose.Fructose.Galactose.Glucose.Gulose. | |
| 3. |
Non-metals do not displace hydrogen from dilute acids. They react with hydrogen to form hydrides.EXERCISE S1. Which of the following pairs will give displacement reactions?(a) NaCl solution and copper metal(b)MgCl, solution and aluminium metal(c) Feso, solution and silver metal(d) AgNO, solution and copper metal.2. Which of the following methods is suitable for preventing an iron frying pan fırusting?(a) Applying grease(b) Applying paint(e) Applying a coating of zincAll of the above.3. An element reacts with oxygen to give a compound with a high melting pointcompound is also soluble in water. The element is likely to be(a) calcium(b) carbon(c) silicon |
| Answer» 1. B2 all of the above 3. CALCIUM | |
| 4. |
Breifly describe two nation theory |
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Answer» -nation theory is the basis of the creation of Pakistan. According to this theory Muslims and Hindus are two separate nations by definition; Muslims have their own customs, religion, and tradition, and from social and moral points of view, Muslims are different from Hindus; and therefore, Muslims should be able to have their own separate homeland in which Islam is the dominant religion, being segregated from Hindus. The two-nation theory advocated by the All India Muslim League is the founding principle of the Pakistan Movement (i.e. the ideology of Pakistan as a Muslim nation-state in the northwestern and eastern regions of India) through the partition of India in 1947.There are varying interpretations of the two-nation theory, based on whether the two postulated nationalities can coexist in one territory or not, with radically different IMPLICATIONS. One interpretation argued for sovereign autonomy, INCLUDING the right to secede, for Muslim-majority areas of colonial India, but without any transfer of populations (i.e. Hindus and Muslims would continue to live TOGETHER). A different interpretation contends that Hindus and Muslims constitute "two distinct and FREQUENTLY antagonistic ways of life and that therefore they cannot coexist in one nation.In this version, a transfer of populations (i.e. the total removal of Hindus from Muslim-majority areas and the total removal of Muslims from Hindu-majority areas) is a desirable step towards a complete separation of two incompatible nations that "cannot coexist in a harmonious relationship".Opposition to the two-nation theory came from both nationalist Muslims and Hindus, being based on two concepts.The first is the concept of a single Indian nation, of which Hindus and Muslims are two intertwined communities.The second source of opposition is the concept that while Indians are not one nation, neither are the Muslims or Hindus of India, and it is instead the relatively homogeneous provincial units of the Indian subcontinent which are true nations and deserving of sovereignty; this view has been presented by the Baloch,Sindhi,Bengali,and Pashtun sub-nationalities of Pakistan, with Bengalis seceding from Pakistan after the Bangladesh Liberation WAR in 1971 and other separatist movements in Pakistan are currently in-place |
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| 5. |
Radicals which are formed by the loss of electrons are called |
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Answer» Oxidative stress occurs when an oxygen molecule splits into SINGLE atoms with unpaired electrons, which are called free radicals. ... Electrons like to be in pairs, so these atoms, called free radicals, SCAVENGE the body to SEEK out other electrons so they can become a PAIR. This CAUSES damage to cells, proteins and DNA. |
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| 6. |
Q.Write about 5 apparatus used in chemistry laboratory with diagram... |
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Answer» A-List of BASIC & common LABORATORY Apparatus is as FOLLOWS:Bunsen burnerTripodTripod standWire gauzeStand bathTest tubeA Test TUBE holderTest tube standBeakersConical or titration flaskFunnelGlass funnelRubber stopperReagent bottleWash bottle |
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| 7. |
The liquid substance is ethanoic acid (acetic acid), percentage purity is 99-100. Density is 1.05 .What volume of the original acid will you measure to prepare 0.25M solution into a 2,000ml volumetric flask. In addition to this, list all the apparatus/ equipment that you need to prepare the solution. |
| Answer» ACETIC acid), percentage purity is 99-100. DENSITY is 1.05 .What volume of the original acid will you MEASURE to PREPARE 0.25M solution into a 2,000ml volumetric FLASK. | |
| 8. |
The force which is responsible for the formation of an electrical ent bond |
| Answer» USE N95 MASK............. | |
| 9. |
A B1زاsl.no Answer the following questions:What do you mean by inter molecular space ?What is diffusion?Name the three state of Matter?4 What are the charactenstics of (1) Solids (11) Liquids (in) GasesWhy do particles attract each other in case of solids?زر)an |
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Answer» there is so much MISTAKE to write these QUESTIONS in 4th questions (1) SOLIDS (11) liquids (in)gases the underline NUMBER is mistake 1. (2)2. (3)write properle |
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| 10. |
True or false all green plants have capacity to prepare their oown food (T/F) |
| Answer» TRUE HOPE IT HELPS MARK AS BRAINLIEST | |
| 11. |
plz help. '-'how can i find the oxidation state of an element according to its subshell electronic configuration. I will mark those answers with example as brainliest |
| Answer» EXPLANATION:SORRY I can't | |
| 12. |
Radicals are formed by the loss of electrons such radicals are called |
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| 13. |
5. Under what conditions rounding off a number becomesnecessary ? |
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Answer» in POINT valuesExplanation: |
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| 14. |
please answer me as mentioned please no spams whose answer would be according to what is mentioned would be marked as brainliest .please |
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| 15. |
Please answer it and help me fast |
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Answer» tion:Some other EXAMPLES of displacement reactions which can occur are: zinc displacing IRON IONS from iron(II) sulfate solution. nickel displacing copper from copper(II) NITRATE solution. copper displacing silver from silver(I) nitrate solution. |
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| 16. |
Why we should use alternative sources of energy instead of conventional sources. Compare them and write your findings to show which one is better |
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Answer» s led to the rise of a NUMBER of alternative energy sources. While the viability of each can be argued, they all contribute something positive when COMPARED to fossil fuels. Lower EMISSIONS, lower fuel prices and the reduction of pollution are all advantages that the use of alternative fuels can OFTEN provide. |
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| 17. |
Prop-1-en-1-ol reaction with Ba(OH)2 |
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Answer» en-1-ol REACTION with BA(OH)2 to make HYDRIDE 1ba pre-opoh 3. |
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| 18. |
Arrange the cl,H, o, N and decreasing order of their vendor wall radii |
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Answer» rall DECREASING order is: Cl> N > O >H. I hope this will HELP you |
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| 19. |
If an element x is placed in group 1, what will be the formula and the nature of bonding of its chloride. |
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| 20. |
For which of the following orbital is symmetrical about x- axis multiple que and the option is[a]2px [b] 3py [c] 3pz [d] 3dx2-y2 |
| Answer» ANSWER is 2px I THINK please mark as BRAINLIEST ANSWER | |
| 21. |
A balloon filled with nitrogen has a volume of 2.5dm3 at a pressure of 1.0 atm at 25°C.What will be the volume of balloon when it is cooled to -73 °C, assuming that the pressure remains constant? |
| Answer» SORRY MATE I don't KNOW this QUESTION's ANSWER | |
| 22. |
Draw MO DIAGRAM for Hf |
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Answer» tion:HFH_Fhydrogen shares it's 1 electron with FLUORINE to BECOME stable.hope it HELPS you |
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| 23. |
Give an example of each of the following chemical changes. (a) A photochemical reaction involving(i) silver salt (ii) water(b) A reaction involving(i) blue solution(ii) formation of dirty green precipitate(c) Two gases combine to form a white solid.(d) Two solids combine to form a liquid.(e) A reaction where colour change is noticed. |
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Answer» Answer(i) Blue solutionFe+CuSO 4(aq) ⟶ GREEN solutionFeSO 4 +CU (ii) FeSO 4 +2NaOH⟶ Dirty greenppt.Fe(OH) 2 +NA 2 SO 4(aq) |
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| 24. |
Electroplating is commonly used to coat metal objects with other metals. A student wanted to electroplate a zinc ring with copper. a) What object would be the cathode in this process? b) What would be the electrolyte? c) What would be the anode d) How does the mass of the anode change during electroplating? State another application of electrolysis. ( 1 mark) |
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Answer» tion:a) Zn metal is prescent at cathodeb) electrolyte WOULD be Znsc) we can take any other electrode of Zn which has IMPURITY MIXED of other metald) mass of anode is decreesed during this process and gots depositted below anode CALLED anodemud |
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| 26. |
Which is the odd one out in chlorine,argon,mercury and carbon |
| Answer» HI MATE HERE IS YOUR ANSWER..✌✌Mercury is your RIGHT answer.. | |
| 27. |
Valence electrons for : hydrogen, helium, lithium, beryllium |
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Answer» Explanation:There is one VALENCE electron in hydrogenHelium is a NOBLE GAS, so there are no VALANCE electronsThere is one valenece electron in lithiumThere are two valence electrons in BERYLLIUM |
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| 28. |
Molten magnesium bromide was electrolyzed using graphite electrodes. a) Explain why solid magnesium bromide does not conduct electricity but conducts when in molten state. ( 2 marks) b) Give the formulas of two ions, including their charges, present in molten magnesium bromide. ( 2 marks) c) Write an equation for the reaction at the cathode. ( 2 marks) d) Is the reaction at the cathode oxidation or reduction? Give a reason for your answer. ( 2 marks) |
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Answer» a) because it is an IONIC solidb)Mg2+ and Br2-c)Mg²^+ + 2e- ------> MGD) REACTION in cathode is always oxidation because ELECTRONS from current source PASSES only through cathode to get oxidation of products |
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| 29. |
which of the following carbonyls will have the strongest C-O bond? (1)[V(CO)6]minus. (2)[Mn(CO)]plus |
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Answer» tion:1st OPTION will have the STRONGEST bondhope i HELPS you dear❤follow me on INSTA multimillonboy..!! |
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| 30. |
EXPLAIN ME THE COORDINATE BOND?? |
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Answer» finition of a coordinate bond❤ is a CHEMICAL bond between two atoms when one of the atoms shares a PAIR of electrons.An example of a coordinate bond is the relationship between HYDROGEN chloride and ammonia when the AMMONIUM ions are FORMED by the transfer of a hydrogen ion to the pair of electrons in the ammonia molecule.....mark me as brainliest...✌✌✌ |
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| 31. |
Property of solid to maintain shape against external force is called |
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Answer» Particles in a solid have strong intermolecular forces of attraction. ... Therefore, when an EXTERNAL or outside FORCE is applied to the solid then due to strong intermolecular force of attraction between the particles, they did not displace from their respective position.I HOPE it may help you .Please MARK me as BRIANLIEST. |
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| 32. |
Doubt in periodic table Can anybody explain me the Periodic Table |
| Answer» SORRY I don't KNOW the ANSWER | |
| 33. |
plzz ans the question: write some allotrophes of carbon. If anybody answer this question I will mark that as brainliest. |
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Answer» Graphite. Graphite is a soft, BLACK and slippery solid.DIAMOND. Diamond is another important allotrope of carbon.BUCKMINSTERFULLERENE. Buckminsterfullerene () is ALSO ONE of the allotropes of carbon. |
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| 34. |
To what temperature must 30.0dm3 of helium at 25°C be cooled at 1 atm pressure for its volume to be reduced to 1.0dm3 at same pressure |
| Answer» PLESE GIVE 20 points then I will TELL you the answer | |
| 35. |
How to know electronic structure |
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Answer» An atom's electron CONFIGURATION is a numeric representation of its electron ORBITALS. Electron orbitals are differently-shaped regions around an atom's NUCLEUS where electrons are mathematically likely to be located. An electron configuration can quickly and simply tell a reader how many electron orbitals an atom has as WELL as the number of electrons populating each of its orbitals. Once you understand the basic PRINCIPLES behind electron configuration, you will be able to write your own configurations and tackle those chemistry tests with confidence. |
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| 36. |
What is the oxidation no. of mn in mn304 |
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Answer» Mn3O4 Application: Manganese(II,III) oxide is the chemical compound with FORMULA Mn3O4. Manganese is present in two oxidation states +2 and +3 and the formula is SOMETIMES WRITTEN as MnO.Mn2O3... Pls follow me and have a nice day.. ❤️ |
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| 37. |
A solution of concentrated sodium chloride (brine) is electrolyzed using graphite electrodes. a) Give the formulas of all the ions present in the sodium chloride solution ( 2 marks) b) Write an equation for the reaction at the cathode ( 2 marks) c) Is the reaction in (b) reduction or oxidation? Give a reason for your answer. (2 marks) D)Which ions remain in the solution unaffected during electrolysis? (2 marks) |
| Answer» B WRITE an EQUATION for the | |
| 38. |
Why do potassium is placed in left of periodic table |
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Answer» Potassium is a chemical element with the symbol K (from Neo-Latin kalium) and atomic number 19. Potassium is a silvery-white metal that is soft enough to be cut with a knife with little force.[5] Potassium metal reacts rapidly with atmospheric OXYGEN to form flaky white potassium peroxide in only seconds of exposure. It was first isolated from potash, the ashes of plants, from which its name derives. In the periodic table, potassium is one of the alkali metals, all of which have a single valence electron in the outer electron shell, that is easily removed to create an ion with a positive charge – a cation, that combines with anions to form salts. Potassium in nature occurs only in ionic salts. Elemental potassium reacts VIGOROUSLY with water, generating sufficient heat to IGNITE hydrogen emitted in the reaction, and burning with a lilac-colored flame. It is found DISSOLVED in sea water (which is 0.04% potassium by weight[6][7]), and occurs in many minerals such as orthoclase, a common constituent of GRANITES and other igneous rocks |
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| 39. |
1 ampere current is passing through an electrolytic cell in which molten Nacl is electrolised, if time taken is 965 sec, then find out weight of metal & volume of gas at anode at stp |
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Answer» 0.23g of NA deposited at cathode and 0.224 litres Cl2 gas RELEASED at anode |
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| 40. |
2mole of hydrogen molecule,H2 |
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Answer» The MOLAR mass of hydrogen is 2 g/mol. 4 GRAMS of hydrogen corresponds to 24=2 moles. 4 grams (2 moles) of hydrogen molecules contains 4 moles of hydrogen ATOMS. 1 mole of hydrogen atoms corresponds to 6.Explanation: |
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| 41. |
145 per cond *100=7912Epermedpecopperof oper100100 ron7=77Theofcopper in copper de derved trom all thePROBLEMS FOR PRACTICE1.216 metal whestrated down by licohher experimen 1-15 of copper idegom so wie by 03daude Law Dean Pop2. Silver Norde is perpared by |
| Answer» EXPLANATION: | |
| 42. |
the number of elcetrons , protons and neutrons in a species are equal to 18, 16 and 16 respectively .assign the proper symbol to the species |
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Answer» Assign the proper symbol to the species. The atomic NUMBER is equal to the number of PROTONS = 16. The ELEMENT is sulphur (S). = 16 + 16 = 32.I hope it may help you .Please mark me as BRIANLIEST. |
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| 43. |
Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam? 1 pointFeOFe₂O₃Fe₃O₄Fe₂O₃ and Fe₂O₄ |
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Answer» s ur ANS cozs iron cannot react with cold or HOT WATER but it react with steam to form metal oxide and hydrogen 3FE +4H2O gives fe3o4 + 4h2thank u ❤ hope this will help u mark this ans as brainliest ans✌ |
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| 44. |
What is half life formula of a reaction? |
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Answer» Half-Life Formula t1/2 is the half-life of the reaction (UNIT: seconds) [R0] is the INITIAL reactant concentration (unit: mol. L-1 or M) k is the rate CONSTANT of the reaction (unit: M(1-n)s-1 where 'n' is the reaction ORDER) |
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| 45. |
wavelenght of first line in balmar is x angstorm units then wavelenght of second line in lymann series just i need final answer |
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Answer» wavelength of first LINE in BALMER is X angstroms then wavelength of SECOND line in Lyman is X+1angstrom |
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| 46. |
2. Mention some fossil fuels from your day to day life which can cause air pollution. Also the type of pollutants they realised, |
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Answer» coal and petroleum are the FOSSIL FUELS for day to day life and they cause AIR POLLUTION also |
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| 47. |
Name a liquid which can be classified as a purel substance conduct electricity |
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Answer» your answer..MERCURY is the liquid which can be CLASSIFIED as a pure SUBSTANCE that conduct electricity HOPE this helps you |
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| 48. |
Why do we need to regulate the temperature at 373K during manufacture of Plaster of Paris? Also explain the process of its manufacture with the help of an equation. |
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Answer» On heating gypsum at 373 Kelvin it loses water MOLECULES and it becomes calcium sulphate HEMIHYDRATE which is CALLED as plaster of PARIS. Plaster of paris is a white powder on mixing with water it changes to gypsum once again giving a hard solid mass. Hope it HELPS!Explanation: |
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| 49. |
Explain the production of sodium hydroxide and baking soda common salt with help of chemical eqn |
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Answer» ectricity is passed through an AQUEOUS SOLUTION of SODIUM chloride . (called brine), it decomposes to form sodium hydroxide. The process is called chlor-ALKALI process - because of the products fromed chlor for chlorine and alkali for sodium hydroxide.♥ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs ʏᴏᴜ. ㋛♥ᴘʟᴇᴀsᴇ ғᴏʟʟᴏᴡ ᴍᴇ ᴀɴᴅ ᴍᴀʀᴋ ᴀs ʙʀᴀɪɴʟɪᴇsᴛ. ㋛ |
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| 50. |
Differentiate between compounds and mixtures |
| Answer» MIXTURE is like genral mixing of two or more COMPONENTS but in compound the SPECIFIC amount of reactants are reacted to each to form compound Explanation:l wish this is helpful to you | |