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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. |
The clouds consist of charged particles of water dispersed in air.Some of them are +vely charged, others are -vely charged.When +vely charged clouds come closer they cause lightening and thundering whereas when +ve and -ve charged colloids come closer they cause heavy rain by aggregration of minute particles.It is possible to cause artifical rain by throwing electrified sand or silver iodide from an aeroplane and thus coagulating the mist hangind in air. When excess of `AgNO_3` is treated with KI solution, Agl formsA. `+ve` charged solB. `-vely` charged solC. neutral solD. true solution |
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Answer» Correct Answer - A `AgNO_3("excess")+KItoAgloverset(+AgNO_3("remaining"))to Agl//Ag` |
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| 2. |
Adsorption is the presence of excess concentration of any particular component at the surface of liquid a solid phase as compared to bulk.This is due to presence of residual forces at the surface of body.In the adsorption of hydrogen gas over a sample of charcoal, `1.12cm^3` of `H_2(g)` measured over S.T.P was found to absorb per gram of charcoal.Consider only monolayer adsorption.Density of `H_2` is 0.07gm/cc. In another experiment same 1 gm charcoal adsorbs 100 ml of 0.5M `CH_3COOH` to form monolayer and thereby the molarity of `CH_3COOH` reduces to 0.49. `((3xx47.43)/(4pi))^(1//3)=2.24` `(2.24)^2=5` Molecule of acetic acids adsorbed-A. `6.023xx10^20`B. `6.023xx10^21`C. `6.023xx10^22`D. `6.023xx10^23` |
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Answer» Correct Answer - A moles of acetic acid adsorbed `=0.5xx100/1000-0.49xx100/1000=10^(-3)` moles so molecules adsorbed `=10^(-3)xx6.023xx10^23=6.023xx10^20` molecules. |
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| 3. |
Adsorption is the presence of excess concentration of any particular component at the surface of liquid a solid phase as compared to bulk.This is due to presence of residual forces at the surface of body.In the adsorption of hydrogen gas over a sample of charcoal, `1.12cm^3` of `H_2(g)` measured over S.T.P was found to absorb per gram of charcoal.Consider only monolayer adsorption.Density of `H_2` is 0.07gm/cc. In another experiment same 1 gm charcoal adsorbs 100 ml of 0.5M `CH_3COOH` to form monolayer and thereby the molarity of `CH_3COOH` reduces to 0.49. `((3xx47.43)/(4pi))^(1//3)=2.24` `(2.24)^2=5` Surface area of charcoal adsorbed by each molecule of (acetic soda) is-A. `7.8xx10^(-19) cm^2`B. `7.8xx10^(-18) cm^2`C. `7.8xx10^(-17) cm^2`D. `7.8xx10^(-16) cm^2` |
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Answer» Correct Answer - C moles of acetic acid used `=0.5xx100/1000-0.49xx100/1000=10^(-3)`moles number of molecules `=10^(-3)xx6.023xx10^23=6.023xx10^20` surface area of charcoal `=4.73xx10^4 cm^2` surface area of charchol adsorbed by each molecule`=(4.73xx10^4)/(6.023xx10^20)=7.8xx10^(-17) cm^2` |
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| 4. |
Which of the following is a sulphide ore?A. WillemiteB. cryoliteC. CerussiteD. Argentite |
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Answer» Correct Answer - d Argentite is `Ag ,S . `willemite is a silicate`(Zn_(2)[SiO_(4)])`,cryolite is a fluoride `(Na_(3) AIF_(6))` and cerussite is a carbonates ,`Pb,CO_(3))` |
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| 5. |
Calamine is an ore ofA. leadB. calciumC. zineD. magnesium |
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Answer» Correct Answer - c `ZnCO_(3)` "an important ore of Zinc called smithsonite in the USA, but" `ZnCO_(3)` is cold calamine in Europe |
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| 6. |
The entire scientific and techlolgical process used for isolation of the metal from its orea is known asA. metamerismB. metalluryC. meteoseologyD. metallography |
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Answer» Correct Answer - b Metallurgy is the commercial extraction of metals from there ores and the preperation of metals for use, iit usually includes saverels staps : (1) Mining the ore ,(2)pretreatment of the ore, (3) reduction of the ore to the free metal (4) refining or purifying tyhe metal, and (5) alloying , if necessary |
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| 7. |
Which of the following metals is found in nature as carnonate?A. SrB. CaC. BD. Os |
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Answer» Correct Answer - a The properties of metals influnce the kinds of ores in which they are found ,and the metallurgical processes used to exreact them form there ores. Metal sourse may be claccified broadly into five main types : (i) Type -1 Metals are very ellectropositive matals (all alkali metals and Be) found as soluble salts e.g. chlorides,corbonetes ,sulphates ,etc. and as consitituents of alumina - silicate rocks .The metals are exetracted by electrolytic techniques . (ii) Type - 2 Metals are the elecropositive alkaline earthmatals found principlipally as insolublecarbonets and sulphates ( megnasium sulphate is sioluble ) . They are also extracted by electrolisis . (iii) Type - 3 Metals . The main sources of these metals `(BA_(L), Sc Y La,Ac)` are oxides and mixede oxides. A variety of method are used to exteracte these metals including electrolisis and camical reductuion with `C,CO` .and more reklative metals . Type - 4 Metals such as `Fe,Co,Ni,Cu,Bi` etc .occur principally as sulphides , and kless frequently as oxides .The sulphides are almost always converated to oxides (Prior to reaction with `C,CO`and in some instances hydrogen ),or sulphates for subsequmt electrolytic treatmeent Type - 5 Metal such as `Ru,Os,Rh,Ir` ,etc are uncreative metals and in the free state or as easily reduciblke componunds |
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| 8. |
Which of the following statements is correct ? (i)The s-blocks metals occut as chlorides, slicates and carbonates (ii)The d- and p- block metals and found as oxides and salphides and axcept for the group `3` metals which occure as phophates, and the platimum group metals and gold which occut in uncombined form (iii)There is no minetral source of technetium `(Tc)`, is radinactive element that is made in nucles reactors (iv) All the laothanides `(Ce" to "lu)` occur as phophatesA. (i), (iv)B. (i),(iii),(iv)C. (i),(ii),(iii)D. (i),(ii),(iii)(iv) |
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Answer» Correct Answer - d The chemical composition of the most common ores correlear will the locations of the metals in the periodic table .The early transition metals of the left of the d-block `(Ti,V,Cr Mn, Zr,Ni,Hf, Ta, W` and Re) occure as oxide , and the d-block `(Cu,Ni,Cu,Zn,Mo,Ag,Cd,and Hg)` "occure on sulphade" This pattem makes sense becomes the less electrongative metals (or more electropositive metals) lend to form ionic metals such as oxygen by contact ,the more dectriongative metal) and to form compound with more cavalent charactore by bondingf to the less electrogative nonemetal such as sulphar We might also find oxide ores for the s-block metals except for`Al` and `Sn`(Ga, Ge, As In,Sb,Ti,Pb Bi)` "metaols of the s-block metals are trongly basis and for too reaction to in an enviroment that contain scide oxide such as" `CO_(2)` and `SO_(2)` "consequentily, s-block metals are found in metal as carbon as carnatices as silkcates , and in the case of" `Na and K` "as chlorides". "Only gold and the platimum group metals" `(Rb,Rb,Pd,Os lr, and Pt)` are sufficintly straactive be to aoocure commonly in anobined form as the free metals. |
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| 9. |
2 mol of an ideal gas at `27^(@)C` temperature is expanded reversibly from `2L` to `20L`. Find entropy change `(R = 2 cal mol^(-1) K^(-1))`A. `92.1`B. `0`C. `4`D. `9.2` |
| Answer» Correct Answer - D | |
| 10. |
Write lens maker's formula. |
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Answer» 1/f = (n -1) (1/R1-1/R2). |
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| 11. |
It’s an excellent story, and in the end it turns ______ that everyone had a part in the murder. A) out B) up C) in D) away |
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Answer» Correct option is C) in |
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| 12. |
In court, she was so upset that she broke ______. A) out B) in C) up D) down |
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Answer» Correct option is D) down |
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| 13. |
Which of the following part appears black in human's eye? (A) Iris (B) Pupil (C) Cornea (D) Retina |
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Answer» Pupil part appears black in human's eye. |
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| 14. |
The car ______ after the crash but fortunately no one was killed. A) turned down B) turned back C) turned over D) turned away |
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Answer» Correct option is A) turned down |
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| 15. |
Match the following and select correct answer.(a) CaSO4.1/2H2O(1) Gypsum(b) CaSO4. 2H2O(2) Washing soda(c) Na2CO3.10H2O(3) Plaster of Paris(A) a -1, b -3, c -2 (B) a -3, b -2, c -1 (C) a -3, b -1, c -2 |
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Answer» (C) a -3, b -1, c -2. |
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| 16. |
After a heart attack, he needed a major surgery, but fortunately the operation was _____. A) happy B) different C) successful D) personal |
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Answer» Correct option is C) successful |
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| 17. |
What will happen to the reading of Ammeter if we increase the length of manganin wire? |
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Answer» The decreases. |
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| 18. |
Aldehyde (A) R – OH (B) R – CHO (C) R – O – R (D) R – COOH |
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Answer» The Correct option is (B) R – CHO. |
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| 19. |
Marie Curie was born ______ Warsaw. A) on B) at C) in D) from |
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Answer» Correct option is C) in |
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| 20. |
I didn’t like that city at all. The streets were so _____ and the air was so _____. A) dirty / messy B) dirty / polluted C) personal / noisy D) messy / polluting |
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Answer» Correct option is B) dirty / polluted |
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| 21. |
Take water fully in a glass bottle and cap it. Put the bottle in a deep fridge. Predict what happens? |
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Answer» Bottle will break. |
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| 22. |
There is a bus station directly ______ the entrance. A) beside B) opposite C) on D) of |
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Answer» Correct option is B) opposite |
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| 23. |
I’m still waiting ______ the Blue Train. A) to B) of C) for D) at |
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Answer» Correct option is C) for |
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| 24. |
His solution is always of the impermanent, unsatisfactory type. A) quick fix B) quick sand C) queasy |
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Answer» Correct option is A) quick fix |
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| 25. |
That’s the palace _____ the King lives. A) who B) which C) where D) when |
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Answer» Correct option is C) where |
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| 26. |
That’s the house _____ I was born. A) when B) that C) where D) which |
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Answer» Correct option is C) where |
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| 27. |
He lives ______ number five. A) at B) on C) of D) in |
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Answer» Correct option is A) at |
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| 28. |
Is there a fridge ______ your kitchen? A) at B) on C) over D) in |
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Answer» Correct option is D) in |
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| 29. |
The Red Lion is the pub _____ we met for a drink. A) which B) that C) where D) when |
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Answer» Correct option is C) where |
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| 30. |
Shall we have a snack lunch in a pub for a change? - _____. A) That's a good idea, I haven't been to any pub lately. B) The nearest pub is round the corner. C) We have no pubs in our country. D) Will you look through the menu? E) And what about dessert? |
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Answer» Correct option is A) That's a good idea, I haven't been to any pub lately |
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| 31. |
Can you get the eggs ______ the fridge, please? A) out B) out of C) over D) off |
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Answer» Correct option is B) out of |
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| 32. |
WonkaVite makes people (a) older, (b) younger. |
| Answer» WonkaVite makes people younger. | |
| 33. |
(i) What trees does Mr Wonka mention? Which tree does he say lives the longest? (ii) How long does this tree live? Where can you find it? |
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Answer» (i) The trees that Mr Wonka mentioned are the Douglas fir, the oak, and the cedar. He said that a tree called Bristlecone pine lives the longest. (ii) This tree lives for over 4000 years. It can be found upon the slopes of Wheeler Peak in Nevada, U.S.A |
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| 34. |
Mr Wonka begins by asking himself two Questions. What are they? (i) What is _______________________________________________? (ii) What lives ____________________________________________? |
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Answer» (i) What is the oldest living thing in the world? (ii) What lives longer than anything else? |
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| 35. |
Mr Willy Wonka is (a) a cook, (b) an inventor, (c) a manager. |
| Answer» Mr Willy Wonka is an inventor. | |
| 36. |
Can anyone’s age be a minus number? What does “minus 87” mean? |
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Answer» No, no one’s age can be a minus number. Here, “minus 87” means that the person had to wait eighty seven years before he could come back. He had taken a strong dose of WonkaVite and had therefore, disappeared. |
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| 37. |
Let's go to the pub for a quick beer. A) quilt B) quick one C) queue |
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Answer» Correct option is B) quick one |
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| 38. |
Mr Wonka wants to invent a new thing which will make people (a) younger, (b) older |
| Answer» Mr Wonka wants to invent a new thing which will make people older. | |
| 39. |
Let’s go ______ to the river to swim. A) out B) down C) through |
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Answer» Correct option is B) down |
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| 40. |
The modern economy is described as…………. (a) Demand Economy (b) Supply Economy (c) Money Economy (d) Wage Economy |
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Answer» (c) Money Economy |
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| 41. |
…… the state is all powerful in preparation and implementation of the plan. (a) Centralized planning (b) Planning by direction (c) Indicative planning(d) Imperative planning |
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Answer» (d) Imperative planning |
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| 42. |
What happens to the volunteer who swallows four drops of the new invention? What is the name of the invention? |
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Answer» The moment the twentyyearold volunteer swallowed four drops of the new invention, he began wrinkling and shriveling up all over. His hair started dropping off and his teeth started falling out. Before Mr Wonka knew it, the volunteer had suddenly become an old man of seventyfive. The name of the invention was Vita Wonk. |
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| 43. |
You look rather ______. Why don’t you see a doctor? A) unhealthy B) tired C) unpleasant D) fair |
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Answer» Correct option is A) unhealthy |
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| 44. |
To inherit money is the same as to ______ into money. A) come B) move C) keep |
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Answer» Correct option is A) come |
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| 45. |
An Indian real estate company receives rent from Google in New York. This transaction would be recorded on………………..side of ……………..account.a. credit, current c. debit, capital b. credit, capital d. debit, current |
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Answer» Answer is: a. credit, current |
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| 46. |
MV stands for…………. (a) demand for money (b) supply of legal tender money (c) supply of bank money (d) total supply of money |
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Answer» (b) supply of legal tender money |
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| 47. |
Which of the following is not correctly matched: (a) Financial planning (b) NITI Aayog (c) Seven pillars of effective governance (d) Physical planning |
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Answer» (c) Seven pillars of effective governance |
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| 48. |
Basic infrastructure facilities in Economics are known as: (a) Human capital (b) Physical capital (c) Social overheads capital (d) Working capital |
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Answer» Basic infrastructure facilities in Economics are known as Social overheads capital. |
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| 49. |
A heavy ball is suspended as shown. A quick jerk on the lower string will break that string but a slow pull on the lower string will break the upper string. The first result occurs because: A. the force is too small to move the ball B. action and reaction is operating C. the ball has inertia D. air friction holds the ball back E. the ball has too much energy |
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Answer» C. the ball has inertia |
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| 50. |
Will you take the job? We must have a quick ______. A) mind B) decision C) deciding D) manner |
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Answer» Correct option is B) decision |
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