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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 old man died not of injuries ____ in the accident but of a heart attack. A) were sustained B) sustained C) to sustain D) what sustained |
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Answer» Correct option is B) sustained |
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| 2. |
What day is after Wednesday? |
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Answer» Correct answer is Thursday |
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| 3. |
The film was so terrifying that I could hardly bear _____ it. A) watching B) to watch C) to be watching D) to have watched |
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Answer» Correct option is A) watching |
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| 4. |
The last time ____ to the library was last week. A) I have gone B) I have been to C) I wasD) I went |
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Answer» Correct option is D) I went |
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| 5. |
The library ____ since last Wednesday. A) has been closed B) was closed C) closed D) is closed |
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Answer» Correct option is A) has been closed |
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| 6. |
She ____ television since she got home a couple of hours ago. A) watched B) is watching C) has been watching D) watched |
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Answer» Correct option is C) has been watching |
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| 7. |
The vapour pressure of water is `12.3 kPa` at `300 K`. Calculate vapour pressure of `1` molal solution of a solute in it. |
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Answer» Correct Answer - `P_(s)=12.08 kPa` `p^(@)=12.3kPa,p_(S)=?` `M=1(1 mol e` of solute is dissolved in `1 L` of solution `)` Molarity of water `=(1000)/(18)=55.56` `(` or number of moles of water `=55.56)` `(p^(@)-p_(S))/(p^(@))=CHMi_(2)=(n_(2))/(n_(1)+n_(2))=(n_(2))/(n_(1))(` for dilute solution `)` `(12.3-p_(S))/(12.3)=(1)/(55.56)` `12.30p_(S)=(12.3)/(55.56)=0.2213` `p_(S)=12.3-0.2213=12.078~~12.08kPa` |
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| 8. |
Heptane and octane form an ideal solution. At `373 K`, the vapour pressure of the two liquids are `105.0` kPa and `46.0` kPa, respectively. What will be the vapour pressure, of the mixture of `25 g` of heptane and `35 g ` of octane ? |
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Answer» Correct Answer - `73.43kPa` `p_(hepten e)^(@)=105.2kPa,p_(" octane")^(@)=46.28kPa` `Mw` of heptane `(C_(7)H_(16))=100` `Mw` of octane `(C_(8)H_(18))=114` Moles of heptane `=(26)/(100)=0.26` Moles of octane `=(35)/(114)=0.31` `CHMi_(hepta n e)=(0.26)/(0.26+0.1)=0.456` ` CHMi_(octa n e)=1-0.456=0.544` `p_(hep ta n e)=p_(hepta n e)^(@)xxCHMi_(hep t an e)` `=105.2xx0.456=47.97kPa` `p_(oc t an e)=p_(ocatn e)^(@)xxCHMi_(octa n e)` `=46.8kPaxx0.544=25.46kPa` `p_(t otal)=47.97+25.46=73.43kPa` |
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| 9. |
Starting cultivation by the end of winter season and take harvest before rainy season’. Which agricultural season is mentioned here? Which are the main crops of this season? |
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Answer» Zaid season Main crops: Fruits and vegetables |
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| 10. |
Secondary alcohols on heating with copper at `300^(@)C` give,A. AlkenesB. AldehydesC. KetonesD. tert-alcohols |
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Answer» Correct Answer - C `2^(@)` alcohol on oxidation with `Cu` gives ketone. |
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| 11. |
`Na_(2)[PtBrCl](CN)]` No of geometrical isomers `=x` No of optical isomers `=y` No of ions produced in aqueous solution `=z` Fine the value of `x+y+z` `Na_(2)[PtBrCl(CN)]` |
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Answer» Correct Answer - 6 `x=3` `y=0` [Square planar complex POS is present] `z=3 2Na^(+)+[PtBrClI(CN)]^(2-)` `x+y+z=3+0+3` `=6` |
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| 12. |
How many of the following gases/vapours are colourless? `CO_(2),SO_(2),H_(2)S,NO_(2),HCl,Br_(2),I_(2),CO,Cl_(2)` |
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Answer» Correct Answer - 5 Colourless gases: `CO_(2),SO_(2),H_(2)S,HCl,CO` |
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| 13. |
Classify the following into input unit and output unit devices.Keyboard, Mouse, VDU (Visual Display Unit), Printer, Magnetic tape, Magnetic disk, Light pen, Optical scanner, Plotter, Speech synthesiser, MICR, OCR, Barcode reader, Smart card reader, Speaker, LCD projector. |
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| 14. |
`Na_(2)[PtBrClI](CN)]` No of geometrical isomers `=x` No of optical isomers `=y` No of ions produced in aqueous solution `=z` Fine the value of `x+y+z` `Na_(2)[PtBrCl(CN)]` |
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Answer» Correct Answer - 6 `x=3` `y=0` [Square planar complex POS is present] `z=3 2Na^(+)+[PtBrClI(CN)]^(2-)` `x+y+z=3+0+3` `=6` |
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| 15. |
`S_(N)1` reaction underoges through carbocation intermediate as follows: `R-X(aq.) overset("Slow") hArr R^(+)(aq.)+` `X^(-) (aq.) underset ("fast") overset(H_(2)O)to ROH(aq.)+H^(+)(aq.)` [R=t-Bu, iso-Pr, Me] `(X=Cl, Br, I)` The correct statements are I. The decreasing order of rate of `S_(N)1` reaction is `t-BuXgtiso-PrXgtEtXgtMeX` II. The decreasing order of ionisation energy is `MeXgtEtXgtiso-PrXgt t-BuX` III. The decreasing order of energy of activation is `t-BuX gt iso- PrXgtEtXgtMeX`A. I & II are correctB. I & III are correctC. II and III are correctD. I,II & III are correct |
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Answer» Correct Answer - A Rate of `S_(N)1` reaction is a `tBuXgriso-PrXgtEtXgtMeX` So order of activation energy `t-BuXltiso-PrXltEtXltMeX` order of ionisation energy ltrbgt `tBuXltiso-PrxltEtXltMeX` |
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| 16. |
Which one of the following is an output device of a computer?(a) Mouse(b) Keyboard(c) Monitor(d) Barcode reader |
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Answer» Correct answer is (c) Monitor |
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| 17. |
In which of the following reaction `CH_(4)` will be obtained? i. `CH_(3)-MgBr+CH_(3)-C-=CH` ii. iii. `CH_(3)-MgBr+CH_(3)OH` iv A. i, ii & iiiB. i, ii, iii & ivC. iii & ivD. iii & i, iv |
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Answer» Correct Answer - B All of these reaction gives `CH_(4)` |
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| 18. |
`S_(N)1` reaction underoges through carbocation intermediate as follows: `R-X(aq.) overset("Slow") hArr R^(+)(aq.)+` `X^(-) (aq.) underset ("fast") overset(H_(2)O)to ROH(aq.)+H^(+)(aq.)` [R=t-Bu, iso-Pr, Me] `(X=Cl, Br, I)` The correct statements are I. The decreasing order of rate of `S_(N)1` reaction is `t-BuXgtiso-PrXgtEtXgtMeX` II. The decreasing order of ionisation energy is `MeXgtEtXgtiso-PrXgt t-BuX` III. The decreasing order of energy of activation is `t-BuX gt iso- PrXgtEtXgtMeX`A. I & II are correctB. I & III are correctC. II and III are correctD. I, II & III are correct |
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Answer» Correct Answer - A Rate of `S_(N)1` reaction is a `tBu X gt iso -Pr Xgt Et gt MeX` So order of activation energy `t-BuX lt iso -PrXC lt EtXlt MeX` order of ionisation energy `t Bu X lt iso-BrX-EtX lt MeX` |
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| 19. |
In which of the following reaction `CH_(4)` will be obtained? i. `CH_(3)-MgBr+CH_(3)-C-=CH` ii. iii. `CH_(3)-MgBr+CH_(3)OH` iv A. i, ii & iiiB. i, ii, iii & ivC. iii & ivD. iii & i, iv |
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Answer» Correct Answer - B All of these reaction gives `CH_(4)` |
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| 20. |
The half-life of a protein depends upon its (A) Signal sequence (B) N-terminus amino acid (C) C-terminus amino acid (D) Prosthetic group |
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Answer» (B) N-terminus amino acid |
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| 21. |
`CH_(3)-underset(CH_(3)) underset(|) (C)= CH_(2) underset("Peroxide") overset(HBr)to CH_(3)-underset(CH_(3)) underset(|) (CH)-CH_(2)Br` reaction intermediate of this reaction is:A. `CH_(3)-underset(CH_(3))underset(|) overset(dot) (C)-CH_(2)Br`B. `CH_(3)-underset (CH_(3))underset(|)(CH)-overset(dot)(C)H_(2)`C. `CH_(3)-underset(CH_(3)) underset(|)overset(dot)(C)-CH_(3)`D. `CH_(3)-underset(CH_(3)) underset(|) overset(Br) overset(|) (C)- overset(.) (C)H_(2)` |
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Answer» Correct Answer - A `R-O-OR overset(hv)(rarr)RO^(dot)` `RO^(dot)+HBrrarrROH+Br^(dot)` `CH_(3)-C(CH_(3))=CH_(2)+Br^(dot)rarrCH_(3)-underset(CH_(3)) underset(|) overset(dot) (C)-CH_(2)Br` is more stable intermediate. |
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| 22. |
Amino acid sequence of the encoded protein is not changed in (A) Silent mutation (B) Acceptable mis-sense mutation (C) Both (A) and (B) (D) None of these |
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Answer» (D) None of these |
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| 23. |
Which of the following is correct order?A. `-NH_(2)gt-NO_(2) (-I "effect")`B. `-Fgt-Br(+M "effect")`C. `-CHOgt-CN-(-M "effect")`D. `-CH_(2)CH_(3)gt-COO^(-)(+I "effect")` |
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Answer» Correct Answer - B Correct order of `+M,-Fgt-Br` |
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| 24. |
The correct order of `S_(N)2//E2` ratio for the % yield of product of the following halide is, P.`CH_(3)-CH_(2)-underset(I) underset(|) overset (Ph) overset(|) (C)-CH_(3)` Q. `CH_(3)-underset (Ph) underset(|) (CH)-underset(I) underset(|) (CH)-CH_(3)` R. `CH_(3)-CH_(2)-I` S. `CH_(3)-CH-underset(I) underset(|) (CH)-CH_(3)`A. `RgtSgtQgtP`B. `RgtQgtSgtP`C. `PgtRgtSgtQ`D. `QgtPgtRgtS` |
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Answer» Correct Answer - A Rate of `S_(N)2` reactionL: `1^(@)gt2^(@)gt3^(@)` as `beta` branching increases steric crowding increases in trasition state so it makes less stable T.S. |
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| 25. |
In a DNA molecule, the cytosine is 18%. The percentage of adenine is:(a) 64(b) 36(c) 82(d) 32 |
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Answer» Answer (d) 32 |
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| 26. |
Which of the following reaction correctly reports the major product?A. B. C. D. |
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Answer» Correct Answer - C Decided by the more activating group, `CH_(3)` & `Br` both are `o,p` directing. |
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| 27. |
Which of the following reaction correctly reports the major product?A. B. C. D. |
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Answer» Correct Answer - C Decided by the more activating group, `CH_(3)` & `Br` both are `o,p` directing. |
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| 28. |
why is water alone not very effective for removing dirt from clothes? |
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Answer» Water has "surface tension", a tendency for water molecules on the surface of water to cling together. This creates a film that resists penetration. Soap molecules disrupt the adhesion of water molecules to each other, and so lessens the strength of that film. The water therefore comes in closer contact with other substances, which accelerates the process by which those substances dissolve into water. Water really is an excellent solvent; it dissolves lots and lots of things. Soap merely enhances this process. |
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| 29. |
Which of the following type of compound is mixed with detergent powder to provide brightness to fabrics?A. BoratesB. PeroxoboratesC. BoranesD. Borides. |
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Answer» Correct Answer - B Peroxoborates contains peroxide linkages, which behave as bleaching agent. |
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| 30. |
Pure enantiomer of lactic acid has an optical rotation of `+1.6^(@)`. A sample of lactic acid has an optical rotatin of `+0.8^(@)`. The enantiomer exces is `Xxx10^(1)%`. Find `X` |
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Answer» Correct Answer - 5 Enantiomer excess `=0.8/1.6xx100=50%=5xx10^(1)` |
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| 31. |
Less amount of soap does not do cleaning action properly due to:(1) CMC value is very high than required(2) CMC value is very low than required(3) Macromolecule colloid formation occurs(4) It does not act as electrolyte |
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Answer» Correct option is (2) CMC value is very low than required Micelle or associate colloid formation occurs above a certain conc. known as CMC. |
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| 32. |
1. Irrespective of the source, pure sample of H2O always contains 88.89% by mass of oxygen and 11.11% by mass of hydrogen. (a) Which law is illustrated here? (b) State the law. 2. Complete the table by filling in the blanks: 48 g O2 1.5 mol O2 ….mL O2 (at STP) … g Na 2 gram atom Na 2NA Na atoms….g CO2 2.5 mol CO2 56 L (at STP) 8.5 g NH3 ……mol NH3 11.2 L (at STP) |
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Answer» 1. (a) Law of definite proportions. (b) The same chemical compound always contains the same elements combined in the same fixed proportion by mass. 2.
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| 33. |
The equilibrium constant for the reaction N2(g) + O2(g) ⇋ 2NO(g) is 4 × 10–4 at 200 K. In presence of a catalyst, equilibrium is attained ten times faster. Therefore, the equilibrium constant in presence of the catalyst at 200 K is:(a) 40 × 10–4(b) 4 × 10–4(c) 4 × 10–3 (d) difficult to compute without more data |
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Answer» Correct option (b) 4 × 10–4 |
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| 34. |
Which of the following is/sre not corrcet regarding the product formation ?A. product is recemic mixtureB. products are diastereomersC. product is a single stereoisomerD. product is a meso-compound |
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Answer» Correct Answer - B::C::D The configuration of one of the chiral center does not changes during course of the reaction hence diastereomers are formed. |
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| 35. |
Two liquids `A` and `B` have `P_(A)^(@)` and `P_(B)^(@)` in the ratio of `1:3` and the ratio of number of moles of `A` and `B` in liquid phase are `1:3` then mole fraction of `A` in vapour phase in equilibrium with the solution is equal to :A. 0.1B. 0.2C. 0.5D. `1.0` |
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Answer» Correct Answer - A `X_(A)=(1)/(4),X_(B)=(3)/(4)` `P_("total")=P_(A)^(@)X_(A)+P_(B)^(o)X_(B)` ` =1xx(1)/(4)+3xx(3)/(4)` ` =(1)/(4)+(9)/(4)=(10)/(4)=(5)/(2)` `Y_(A)=(P_(A)^(@)X_(A))/(P_("total"))=(4)/((5)/(2))=(2)/(20)=(1)/(10)=0.1` |
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| 36. |
The chloride of a metal contains 71% chlorine by weight and the vapour density of it is 50. The atomic weight of the metal will be -A. 29B. 58C. 35.5D. 71 |
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Answer» Correct Answer - A Let formula of compound is `MCl_(x)` Molecular mass =100 Mass of metal =29 g Mass of`Cl_(2)=71 g` g ,eq. of metal - geq. Of `Cl_(2)` `(29)/€=(71)/(35.5)` `E=(29)/(2)` Atomic mass = Eq . Mass`xx` valency `=(29)/(2_xx2=29` |
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| 37. |
The solubility product of `Pbl_(2)` is `7.2 xx 10^(-9)`. The maximum mass of `Nal` which may be added in `500ml` of `0.005M Pb (NO_(3))_(2)` solution without any precipitation of `Pbl_(2)` is `( = 127)`:A. `0.09g`B. `1.2 xx 10^(-3)g`C. `6 xx 10^(-4)g`D. `1.08 xx 10^(-5)g` |
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Answer» Correct Answer - A `[I^(-)] = sqrt(7.2 xx 10^(-9))/(0.005) = 1.2 xx 10^(-3) M` Maximum moles of Nal that can be added to `500 ml` of `Pb(NO_(3))_(2)` are `(1.2 xx 10^(-3))/(1000) xx 500 = 6 xx 10^(-4) "moles" rArr 0.09g` |
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| 38. |
which one of the following curves represents the graph of pH during titration of NaOH and HCl (aq).?A. B. C. D. |
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Answer» Correct Answer - B pH first almost ramins same than suddenly `uarr` and then become almost same . |
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| 39. |
`CH_(3)NH_(2)` (0.12 mole, `pK_(b)`=3.3) is added to 0.08 moles of HCl and the solution is diluted to on litre, resulting pH of solution is :A. 10.7B. 3.6C. 10.4D. 11.3 |
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Answer» Correct Answer - C `CH_3NH_2 + HCl to CH_3NH_3Cl` `{:("Mole",0.12,0.08,0),("Mole",0.04,-,0.08):}` pOH=pKb + log = 3.6 pH=10.4 |
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| 40. |
Identity the mismatched pair regarding the anther walls. (a) Epidermal layer – Protective in function (b) Endothecium layer – Helps in dehiscence of anther (c) Middle layer – Persistent layer (d) Tapetum – Nutritive in function |
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Answer» (c) Middle layer – Persistent layer |
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| 41. |
Statement-1: It is difficult to distinquish the strengths of the strong acids such as `HCl, H_2SO_4,HNO_3, HBr, HI or HCIO_4` in dilute aqueous solutions. Statement-2 : In dilute aqueous solution all strong acids donate a proton to water and are essentially 100% ionised to produce a solution containing `H_3O^(+)` ions plus the anions of strong acid.A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1B. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1C. Statement-1 is True, Statement-2 is False.D. Statement-1 is False, Statement-2 is True. |
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Answer» Correct Answer - A All are strong `(alpha=1)` (Levelling effect) |
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| 42. |
Function of exo-cuticle is a. Rigidity of body parts b. Impermeability of water c. Prevention d. Toughness |
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Answer» Function of exo-cuticle is Rigidity of body parts. |
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| 43. |
Function of Exo cuticle in insect is a. Rigidity of body b. Impermeability of water c. Prevent evaporation d. Toughness of flexibility |
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Answer» Function of Exo cuticle in insect is Rigidity of body. |
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| 44. |
Normally nersc axons have a resting potential of about a. - 60 mv b. - 65 mv c. - 75 mv d. -70 mv |
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Answer» Normally nersc axons have a resting potential of about -70 mv. |
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| 45. |
Anticodons are present on (A) Coding strand of DNA (B) mRNA (C) tRNA (D) rRNA |
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Answer» Correct option (C) tRNA |
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| 46. |
While teaching how different food items can be kept fresh for some time, Radha enumerated the following techniques to her class:a. Put it in a bowl and keep the bowl in an open container having cold waterb. Wrap it in a damp clothc. Spread it open in sunshined. Cut it into small pieces and keep it in the darkWhich one of the following food items is she referring to, corresponding to technique 'b' above?1. Onion, garlic2. Green coriander3. Kaju Burfi4. Cooked rice |
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Answer» Correct Answer - Option 2 : Green coriander Concept:
Explanation: Ways to keep food fresh:
Thus, green coriander must be wrapped in a damp cloth to keep it fresh. |
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| 47. |
Which of the following is not a navigable river in India? (a) Brahmaputra (b) Godavari (c) Narmada (d) Chenab |
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Answer» Chenab is not a navigable river in India. |
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| 48. |
If mitochondria is absent in mature RBC what will be the source of energy: (1) TCA (2) ETS (3) link reaction (4) Glycolysis |
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Answer» Correct option: (4) Glycolysis |
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| 49. |
Select the correct option w.r.t. Age pyramids.(1) a - Expanding, b - stable, c - Declining (2) a - stable, b - Expanding, c - Declining(3) a - stable, b - Declining, c - Expanding (4) a - Declining, b - stable, c - Expanding |
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Answer» (1) a - Expanding, b - stable, c - Declining |
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| 50. |
Insects feeding on plants of several genera within a family are called a. Phytopagous b. Polyphagous c. Oligophagous d. Monophagous |
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Answer» Insects feeding on plants of several genera within a family are called Oligophagous. |
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