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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 6651. |
A solid conducting sphere, having a charge Q, is surrounded by an uncharged conducting hollow spherical shell. Let the potential difference between the surface of the solid sphere and that of the outer surface of the hollow shell be V. If the shell is now given a charge of –4Q, the new potential difference between the same two surface is - (1) – 2V (2) 2V (3) V (4) 4V |
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Answer» Correct option (3) V Explanation: Shell will produce constant potential. Thus new potential difference = V |
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| 6652. |
The wavelength of the carrier waves in a modern optical fiber communication network is close to -(1) 1500 nm (2) 600 nm (3) 900 nm (4) 2400 nm |
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Answer» Correct option (1) 1500 nm Explanation: λ ≅ 1550 nm (most widely used wavelength in optical fiber system) |
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| 6653. |
Given below in the left column are different modes of communication using the kinds of waves given in the right column.AOptical Fibre communicationPUltrasoundBRadarQInfrared Light CSonarRMicrowaves DMobile Phones SRadio WavesFrom the options given below, find the most appropriate match between entries in the left and the right column.(1) A-R, B-P, C-S, D-Q(2) A-S, B-Q, C-R, D-P(3) A-Q, B-S, C-R, D-P(4) A-Q, B-S, C-P, D-R |
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Answer» Correct option (4) A-Q, B-S, C-P, D-R Explanation: According to frequency A→Q; B→S; C→P ; D→R |
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| 6654. |
IF the de-Brogile wavelength of a proton is `10^(-13)m`, the electric potential through which it must have been accelerated isA. `4.07xx10^(4)V`B. `8.15xx10^(4)V`C. `8.15xx10^(3)V`D. `4.07xx10^(5)V` |
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Answer» Correct Answer - 2 `lamda_(p)=0.286/sqrtV` `lamda_(p)=10^(-13)m=10^(-3)Å` `10^(-3)=0.286/sqrtV` `rArrV=(0.286)^(2)xx10^(6)` `=0.0817xx10^(6)` `rArr8.15xx10^(4)` volt |
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| 6655. |
Mention three different modes of propagation used in communcation system. |
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Answer» Three different modes of propagation used in communication system are (i) Transmitter (ii) Communication channel (iii) Receiver. (i) Transmitter: A transmitter processes the incoming message signal so as to make it suitable for transmission through a channel and subsequent reception. (ii) Communication channel : communication channel is usually referred to the frequency range allocate to a particular service transmission. (iii) Receiver : A receiver extracts the desired message signals from the received signals at the channel output. |
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| 6656. |
German embryologist, Hans Driesch used which organism’s embryo in his studies?(a) Star-fish(b) Sea-urchin(c) Whale(d) Monkey |
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Answer» Correct choice is (b) Sea-urchin Easiest explanation: In his studies, Hans Driesch used sea urchin’s embryo and found that first two or four cells could be isolated and can lead individually lead to the formation of complete new embryo. |
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| 6657. |
Determine the solubilities of silver chromate, barium chromate, ferric hydroxide, lead chloride and mercurous iodide at `298K` from theor solubility product constants given in Table `7.9`. Determine also the molarities of individual ions. |
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Answer» Silver chromate `Ag_(2)CrO_(4), K_(sp)` of `Ag_(2)CrO_(4)` `1.1xx10^(-12)` Let the solution of `Ag_(2)CrO_(4)` be eauals to `S` `AgCr_(2)O_(4) hArr 2Ag^(o+)+CrO_(4)^(2-)` `1.1xx10^(-12)=(2S)^(2)(S)` or `1.1xx10^(-12)=4S^(3)` or `S^(3)=(1.1xx10^(-12))/4` or `S=((1.1xx10^(-12))/4)^(1//3)` `=0.65xx10^(-4) M` `[Ag^(o+)]=2xx0.65xx10^(-4)=1.30xx10^(-4) M` `[CrO_(4)^(2-)]=1.3xx10^(-4)//2=6.5xx10^(-5)M` ii. Barium chromate= `BaCrO_(4)`: `BaCrO_(4) hArr Ba^(2+)+CrO_(4)^(2-)` `K_(sp)` of `BaCrO_(4)=1.2xx10^(-10)` or `1.2xx10^(-10)=SxxS` or `1.2xx10^(-10)=S^(2)` or `S=sqrt(1.2xx10^(-10))=1.1xx10^(-5) M` iii. Ferric hydroxide: `Fe(OH)_(3)` `Fe(OH)_(3) hArr Fe^(3+)+3overset(Θ)(O)H` `K_(sp) of Fe(OH)(3)=1.0xx10^(-38)` or `1.0xx10^(-38)=Sxx(3S)^(3)` or `1.0xx10^(-38)=27 S^(4)` or `S^(4)=(1.0xx10^(-38))/27` or `S=((1.0xx10^(-38))/27)^(1//4)=1.39xx10^(-10)M` `[Fe^(3+)]=1.39xx10^(-10)M` `[overset(Θ)(O)H]=3xx1.39xx10^(-10)=4.17xx10^(-10)M` iv.Lead chloride `= PbCl_(2)` `PbCl_(2) hArr Pb^(2+)+2Cl^(Θ)` `K_(sp)` of `PbCl_(2)=1.6xx10^(-5)` `1.65xx10^(-5)=Sxx(2S)^(2)` or `1.6xx10^(-5)=4S^(3)` or `S^(3)=(1.6xx10^(-5))/4=0.4xx10^(-5)` `S=(0.4xx10^(-5))^(1//3)=(4xx10^(-6))^(1//3)` `=1.59xx10^(-2)M=[Pb^(2+)]` `[Cl^(Θ)]=2xx1.59xx10^(-2)=3.18xx10^(-2)M` v. Mercuous iodide: `Hg_(2)I_(2)` `Hg_(2)I_(2) hArr Hg_(2)^(2+)+2I^(Θ)` `K_(sp)` of `Hg_(2)I_(2)=4/5xx10^(-29)` `4.5xx10^(-29)=(S) (2S)^(2)=4S^(3)` or `4.5xx10^(-29)=4S^(3)` or `S^(3)=4.5/4xx10^(-29)` or `S=(4.5/4xx10^(-29))^(1//3)` `=2.24xx10^(-10)M=[Hg_(2)^(2+)]` `[I^(Θ)]=2xx2.24xx10^(-10)=4.48xx10^(-10) M`. |
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| 6658. |
An octahedral complex having formula `Ma_(2)b_(2)C_(2)`, which of the following combination is possible to exhibitd optical isomerismA. `a = Cl^(-) " " B "&" C = (en)`B. a & b & `c = EDTA`C. a & `b = C_(2)O_(4)^(-2), " " c = en`D. `a = H_(2)O, b = NH_(3), C = Cl^(-)` |
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Answer» Correct Answer - D `[M(H_(2)O)_(2) (NH_(3))_(2) Cl_(2)] -` complex show optical isomerism |
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| 6659. |
The oxidation number of hyrogen is (i) `0` (ii) ` +1` (iii) ` -1` (iv) `+ 1` only. |
| Answer» (iii) `K^(o+)[Co(CO)_4]^(ɵ)`. Therefore, `x+0=-1orx=-1` Hence (iii) is the correct option. | |
| 6660. |
The correct order for the wavelength of absorption in the visible region is |
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Answer» As metal ion is fixed, the increasing field strengths (CFSE values) of the ligands from the spectrochemical series are in the order: `H_2OltNH_3ltNO2^(ɵ)`. Thus. The energies absorbed for excitation will be in the order: `[Ni(H_2O)_6]^(2+)lt[Ni(NH)_6]^(2+)lt[Ni(NO_2)_6]^(4-)` `(IIIltIIltI)` As `E=(hc)/(lamda)`. The wavelengths absorbed will be in the opposite order: The answer is `:IgtIIgtIII`. |
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| 6661. |
The decreasing order of strength of the bases, `OH^(-), NH_(2)^(-), H-C-=C^(-)` and `CH_(3)-CH_(2)^(-)`:A. `"IV "gt" II "gt" III "gt" I"`B. `"III "gt" IV "gt" II "gt" I"`C. `"I "gt" II "gt" III "gt" IV"`D. `"II "gt" III "gt" I "gt" IV"` |
| Answer» Correct Answer - A | |
| 6662. |
Number of urinals required in hostels for 25 persons.(a) 5(b) 1(c) 5(d) 10 |
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Answer» Correct option is (b) 1 The best I can explain: In office building- 1 per persons, 2 per 21-45, 3 per 46-70 persons, 4 per 71-100. In cinema 1 for 25 persons or part thereof. In restaurant 1 per 50 seats. |
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| 6663. |
A structure that carries water above land is known as an _____________(a) aqueduct(b) aquedant(c) over surface(d) outland |
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Answer» Correct answer is (a) aqueduct For explanation: Bridges for conveying water, called aqueducts or water bridges are constructed to convey watercourses across gaps such as valleys or ravines. The term aqueduct may also be used to refer to the entire watercourse, as well as the bridge. Large navigable aqueducts are used as transport links for boats or ships. |
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| 6664. |
Name the form of track, the rails are welded together by utilising flash butt welding to form one continuous rail that may be several kilometres long.(a) INR(b) CBR(c) SBBR(d) WSR |
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Answer» The correct choice is (b) CBR Easy explanation: The preferred process of flash butt welding involves an automated track-laying machine running a strong electric current through the touching ends of two unjoined rails. The ends become white hot due to electrical resistance and are then pressed together forming a strong weld. Thermite welding is used to repair or splice together existing CWR segments. This is a manual process requiring a reaction crucible and form to contain the molten iron. Thermite-bonded joints are seen as less reliable and more prone to fracture or break. |
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| 6665. |
In this form of track, the rails are welded together by utilising flash butt welding to form one continuous rail that may be several kilometres long, this type of rail is called __________(a) Continuous jointed rail(b) Merged rail(c) Continuous welded rail(d) Continuous welded rail |
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Answer» Right choice is (c) Continuous welded rail To explain I would say: In this form of track, the rails are welded together by utilising flash butt welding to form one continuous rail that may be several kilometres long. Because there are few joints, this form of track is very strong, gives a smooth ride, and needs less maintenance; trains can travel on it at higher speeds and with less friction. Welded rails are more expensive to lay than jointed tracks, but have much lower maintenance costs. |
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| 6666. |
How many litres of water must be added to 2 litre aqueous solution of `HCI` with a `pH` of 1 to create an aqueous solution with `pH` of 2 ?A. `10L`B. `0.9L`C. `2L`D. `18L` |
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Answer» Correct Answer - D How many liters of water …….. `pH = 1 implies [H^(+)]=10^(-1)=0.1M` `pH=2 implies [H^(+)] = 10^(-2) = 0.01M` for dilution of `HCI M_(1)V_(1) = M_(2)V_(2)` `0.1xx2=0.01xxV_(2)` `V_(2) = 20L` Volume of water added `= 20 - 2 = 18` litre |
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| 6667. |
The total number of protons in 10 g of calcium carbonate is `(N_(0) = 6.023 xx 10^(23))` :-A. `1.5057 xx 10^(24)`B. `2.0478 xx 10^(24)`C. `3.0115 xx 10^(24)`D. `4.0956 xx 10^(24)` |
| Answer» Correct Answer - A | |
| 6668. |
The hydrated cupric chloride is strongly heated.Which of the following statements is (are) correct for this ?A. It is reduced to `Cu_2Cl_2`B. Cupic oxide is formed along with `Cu_2Cl_2`C. Only `Cl_2` is liberatedD. `Cl_2` and HCl both are liberated |
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Answer» Correct Answer - A,B,D `3CuCl_2. 2H_2O oversetDeltatoCuO+Cu_2Cl_3+2HCl+Cl_2+H_2O`,( C) only `Cl_2` is liberated is wrong as evident from chemical equation. |
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| 6669. |
Reduction of the metal centre in aqueous permanganate ion involvesA. 3 electrons in neutral mediumB. 5 electrons in neutral mediumC. 3 electrons in weakly alkaline mediumD. 5 electrons in acidic medium |
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Answer» Correct Answer - A,C,D In acidic medium `MnO_4^(-) +8H^(+)+5e^(-)toMn^(2+)+4H_2O` (v.f.=5) In neutral / faintly alkaline medium `MnO_4^(-) +2H_2O+3e^(-)toMnO_(2)+4OH^-` (v.f.=3) In strongly alkaline medium `MnO_4^(-) +e^(-)toMnO_(4)^(2-)` (v.f.=1) |
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| 6670. |
In which of the following oxoanions the oxidation state of central atom is not same as that of its group number in periodic table ?A. `MnO_4^(-)`B. `Cr_2O_7^(2-)`C. `VO_4^(3-)`D. `FeO_4^(2-)` |
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Answer» Correct Answer - D (A)`MnO_4^(-)=+7, [Ar]^(18)3d^(5)4s^(2)=7` (B)`Cr_2O_7^(2-)=+6, [Ar]^(18)3d^(5)4s^(1)=6` (C )`VO_4^(3-)=+5, [Ar]^(18)3d^(3)4s^(2)=5` (D)`FeO_4^(2-)=+6, [Ar]^(18)3d^(6)4s^(2)=8` |
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| 6671. |
Select the correct statement(s) with respect to oxides and oxoanions of transition metalsA. Among oxides of chromium , CrO is basic, `Cr_2O_3` is amphoteric and `CrO_3` is acidicB. No higher oxides of iron above `Fe_2O_3` are foundC. Ti, V, Cr and Mn form oxides MO and their correct incresing order of acidic character is MnO lt CrO lt VO lt TiOD. Vandium (V) oxide does not react with acids but reacts with alkalies only |
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Answer» Correct Answer - A,B (A) and (B) statements are correct. These statements are factual. (C )Along the period, the electronegativity of metals decreases and therefore the differences of electronegativites between metal and oxygen decreases. Hence, the acidic character increases, so the correct order is TiO lt VO lt CrO lt MnO. (D)`V_2O_5` reacts with alkalies as well as acids to give `VO_4^(3-) and VO_2^(+)` respectively. |
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| 6672. |
Statement-1:Dipositive zinc exhibits diamagnetism due to loss of two electrons from 3d-orbital of neutral atom. Statement-2:The electronic configuration of zinc (Z=30) is `[Ar]^(18)3d^10 4s^2`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 - D The electrons are removed from outer most shell i.e. `4s^2` (from isolated gaseous atom ) |
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| 6673. |
Potassium manganate `(K_2MnO_4)` is formed . When:A. Cuprous oxide reacts with alkaline `KMnO_4` solutionB. Manganese dioxide is fused with `K_2CO_3` in presence of `KNO_3`C. Formaldehyde reacts with potassium permanganate in presence of concentrated potassium hydroxide solutionD. Potassium permanganate is heated with potassium hydroxide |
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Answer» Correct Answer - A,B,C,D (A)`KMnO_4 +Cu_2O + KOH to 2Cu(OH)_2 + K_2MnO_4` (B)`2MnO_2 + 2K_2CO_3 + O_2 ("from" KNO_3) to 2K_2MnO_4 + 2CO_2` (C )`HCHO + 2KMnO_4 + 2K_2MnO_4 + H_2O +HCOOH` (D)`4KMnO_4+4KOH oversetDeltato4K_2MnO_4 +2H_2O + O_2` |
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| 6674. |
(A) In allylic substitution propene gives allyl bromide. (R) NBS is a selective brominating agent and gives substitution at the alpha carbon with respect to the double bond.A. If both (A) and (R) are correct and (R) is the correct explanation of (A).B. If both (A) and (R) are correct but (R) is not the correct explanation of (A).C. If (A) is correct but (R) is incorrect.D. IF (A) is incorrect but (R) is correct. |
| Answer» Correct Answer - A | |
| 6675. |
The oxidation states of sulphur in the anions `SO_(3)^(2-), S_(2)O_(4)^(2-)`, and `S_(2)O_(6)^(2-)` follow the orderA. `S_2O_6^(2-)ltSO_4^(2-)ltSO_3^(2-)`B. `S_2O_4^(2-) lt SO_3^(2-) lt S_2O_6^(2-)`C. `SO_3^(2-) lt S_2O_4^(2-)lt S_2O_6^(2-)`D. `S_2O_4^(2-) lt S_2O_6^(2-) lt SO_3^(2-)` |
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Answer» Correct Answer - 2 O.S. of S in `SO_3^(2-)=+4` O.S. of S in `S_2O_4^(2-)=+3` O.S. of S in `S_2O_6^(2-)=+5` (None of these contains peroxide linkage. ) The correct order of increasing O.S. is , `S_2O_4^(2-) lt SO_3^(2-) lt S_2O_6^(2-)` |
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| 6676. |
Ferric ion forms a Prussian blue coloured precipitate due to fromation ofA. `KMnO_(4)`B. `K_(4)[Fe(CN)_(6)]`C. `Fe_(4)[Fe(CN)_(6)]_(3)`D. `[Fe(OH)_(3)]` |
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Answer» Correct Answer - C `4Fe^(3+) + K_(4)[Fe (CN)_(6)] rarr Fe_(4) [Fe (CN)_(6)]_(3) + 4K^(+)` |
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| 6677. |
The method of zone relining of metal is based on the principle of `AIFMIT-2003)`A. Greater mobility of the pure metal than that of impurityB. Higher melting point of the impurity than that of the pure metalC. Greater noble character of the solid metal than that of the impurityD. Greater solubility of the impurity in the molten state than in the solid |
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Answer» Correct Answer - D Zone refining is based on difference in solubility of impurity in its molten as well as solid state. |
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| 6678. |
A gas X is passed through water to form a saturated solution. The aqueous solution on treatment with silver nitrate gives a white precipitate. The saturated aqueous solution also dissolves magnesium ribbon with evolution of a colourless gas Y. Identify X and Y.A. `X` is `CO_(2)` and `Y` is `Cl_(2)`B. `X` is `Cl_(2)` and `Y` is `CO`C. `X` is `Cl_(2)` and `Y` is `H_(2)`D. `X` is `H_(2)` and `Y` is `Cl_(2)` |
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Answer» Correct Answer - C Fact based |
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| 6679. |
How many of the following liberate colured vapour/gas with concentrated `H_2SO_4` ? `KCl(s)+K_2Cr_2O_7(s),KNO_2(s),Kl(s), KBr(s), KCl(s)` `KBr(s)+MnO_2(s),KNO_3,KCl(s)+MnO_2,K_2SO_3` |
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Answer» Correct Answer - 7 (i)`4Cl^(-)+Cr_2O_7^(2-)+6H^(+)to2CrO_2Cl_2uarr`(deep red) +`3H_2O` (ii)`NO_2^(-)+H^(+)toHNO_2 , 3HNO_2 to HNO_3+Nouarr+H_2O` `2NOuarr+O_2uarr to NO_2uarr`(brown) (iii)`3I^(-)+2H_2SO_4 to I_3^(-)uarr` (violet) +`SO_4^(2-)+2H_2O+SO_2` (iv)`2KBr+2H_2SO_4toBr_2uarr` (reddish brown) +`SO_2uarr+NO_4^(2-)+2K^(+)+2H_2O` (v)`Cl^(-)+H_2SO_4 to HCl uarr` (colourless) + `HSO_4^-` (vi)`2KBr+MnO_2+2H_2SO_4 to Br_2uarr("reddish brown")+ 2K^(+)+Mn^(2+)+2SO_4^(2-)+2H_2O` (vii)`4NO_3^(-)+2H_2SO_4toBr_2uarr("reddish-brown")+2K^(+)+Mn^(2+)+2SO_4^(2-)+2H_2O` (viii)`KCl+MnO(OH)_2+2H_2SO_4+2Cl^(-) ("brown")to Mn^(2+)+Cl_2uarr` (yellowish green) +`2SO_4^(2-)+3H_2O` (ix)`SO_3^(2-)+2H^(+)toSO_2uarr` (colourless) +`H_2O` |
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| 6680. |
Write the difference between :(a) catalysts and enzymes(b) promoters and poisons |
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Answer» [Hint : (a) Catalyst is a substance that alters the rate of reaction without consuming itself in the reaction. Ezymes are biocatalysts, they are highly specificthan catalysts. |
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| 6681. |
A heat engine absorbs heat `Q_(1)` at temperature `T_(1)` and `Q_(2)` at temperature `T_(2)` . Work done by the engine is `(Q_(1)+Q_(2))` . This data:A. Violates first law of thermodynamicsB. Violates first law of thermodynamics if `Q_1 = - ve`C. Violates first law of thermodynamics if `Q_2 = - ve`D. Does not violate first law of thermodynamics. |
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Answer» Correct Answer - D Some mechanical energy is always converted to other form of energy or total heat cannot be converted to useful work. This is `II` law of thermodynamics. |
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| 6682. |
Density of `2.05 M` solution of acetic acid in water is `1.02g//mL`. The molality of same solution is:A. `0.44 "mol" kg^-1`B. `1.14 "mol" kg^-1`C. `3.28 "mol" kg^-1`D. `2.28 "mol" kg^-1` |
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Answer» Correct Answer - D Weight of acetic acid `= 2.05 xx 60 = 123` Weight of solution `= 1000 xx 1.02 = 1020` `:.` Weight of water `= (1020 - 123) = 897 g` `:.` Molality `= (2.05 xx 1000)/(897) = 2.285`. |
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| 6683. |
Out of the five isomeric hexanes, the isomer that can give two monochlorinated compounds is:A. n-hexaneB. 2,3-Dimethyl butaneC. 2,2-Dimethyl butaneD. 2-methyl pentane |
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Answer» Correct Answer - B It has two identical `3^@ H-"atoms"` and `12` identical `1^@ H-"atoms"`. |
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| 6684. |
X , Y both responds t `FeCl_3` test and 2,4-DNP test. One is thermodynamically controlled product (TCP) and another is kinetically controlled product (KCP).KCP isA. B. C. D. All of these |
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Answer» Correct Answer - B Fries rearrangement , KCP product is para and TCP product is ortho due to intramolecular hydrogen bonding. |
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| 6685. |
Which of the following can undergo nucleophilic substitution under ordinary conditions? I Allyl chloride II Benzyl chloride III n-Propyl chloride IV Vinyl chlorideA. I, II and III are correctB. I and II are correctC. II and IV are correctD. I and III are correct |
| Answer» Correct Answer - A | |
| 6686. |
Coagulation value of the electrolytes `AlCl_(3)` and NaCl for `As_(2)S_(3)` sol are 0.093 and 52 respectively. How many times `AlCl_(3)` has greater coagulating power than NaCl?A. 930B. 520C. 560D. None of these |
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Answer» Correct Answer - C `("coagulation power of"AlCl_3)/("coagulation power of"NaCl)=("coagulation value of"NaCl)/("coagulation value of"AlCl_3)=52/0.093~~560` |
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| 6687. |
The continuous chain hydrocarbon isomeric with `2`-methyl`-3`-ethyl hexane is:A. nonaneB. `2`-methyle octaneC. `2,3`-dimethylel heptaneD. `2,2,3`-trimethyle hexane |
| Answer» Nonane is continous (Straight)chain molecule. | |
| 6688. |
A `5%` solution (by mass) of cane sugar in water has freezing point of 271 K. Calculate the freezing point of a 5% glucose (by mass) in water. The freezing point of pure water is 273.15 K. |
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Answer» Correct Answer - `269.07 K` `W_(2)=5g,W_(solution)=100g, Mw_(2)=342g` `(C_(12)H_(22)O_(11))` First case `W_(1)=100-5=95g` `DeltaT_(f)=273.15-271=2.15K` `DeltaT_(f)=K_(f)xx(W_(2)xx1000)/(Mw_(2)xxW_(1))` `2.15=K_(f)xx(5xx1000)/(342xx95)` Solve for`K_(f)impliesK_(f)=13.97` Second case `W_(2)=5g, W_(1)=95g, ` ltbr. `Mw_(2)` of glucose `(C_(6)H_(12)O_(6))=180g` `DeltaT_(g)=13.97xx(5xx1000)/(180xx95)=4.085` `273.15-T_(2)=4.085` `T_(2)=273.15-4.085=269.07K` |
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| 6689. |
Find the total number of paramagnetic species among the following? `Se^(3+),Fe^(3+),Mn^(2+),Co^(4+),Co^(3+),Cr^(+),Fe^(2+),Mn^(3+),Cr^(3+),Zn^(3+),Ti^(4+),V^(3+)` |
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Answer» Correct Answer - `0009` `Fe^(3+),Mn^(2+),Co^(4+),Co^(3+),Fe^(2+),Mn^(3+),Cr^(+),Cr^(3+),V^(3+)` |
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| 6690. |
What is light? What part of light is most suitable for photosynthesis? |
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Answer» Light is the visible part of electromagnetic radiations. Blue and red regions of the light spectrum are the most effective in photosynthesis. |
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| 6691. |
Nylon – 6, 6 is(a) Polymide(b) Polyester(c) Polystyrene(d) Polyvinyl |
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Answer» Nylon – 6, 6 is Polymide. |
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| 6692. |
Condensation polymer among the following is - (a) Teflon(b) Polystyrene(c) PVC(d) Dacron |
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Answer» Condensation polymer is Dacron |
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| 6693. |
If the atomic weight of an element is `23` times that of the lightest element and it has `11` protons, then it contains.A. 11 protons, 23 neutrons, 11 electronsB. 11 protons, 11 neutrons, 11 electronsC. 11 protons, 12 neutrons, 11 electronsD. 11 protons, 11 neutrons, 23 electrons |
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Answer» Correct Answer - C If the mass number of an …… Mass No. = no protons + no. of neutrons At. No = no.of protons |
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| 6694. |
What problem arises in using alitame as artificial sweetener? |
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Answer» Alitame is a high potency sweetener. It is difficult to control the sweetness of food while |
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| 6695. |
Which of the following have computers traditionally done better than people?(a) storing information(b) responding flexibly(c) computing numerically(d) both storing information & computing numerically |
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Answer» The correct answer is (d) both storing information & computing numerically Best explanation: None. |
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| 6696. |
Which of the following function returns t If the object is a symbol m LISP?(a) (* )(b) (symbolp )(c) (nonnumeric )(d) (constantp ) |
| Answer» Right choice is (b) (symbolp | |
| 6697. |
What of the following is considered a pivotal event in the history of Artificial Intelligence?(a) 1949, Donald O, The organization of Behavior(b) 1950, Computing Machinery and Intelligence(c) 1956, Dartmouth University Conference Organized by John McCarthy(d) 1961, Computer and Computer Sense |
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Answer» Correct option is (c) 1956, Dartmouth University Conference Organized by John McCarthy Explanation: None. |
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| 6698. |
The component of an ICAI (Intelligent Computer Assisted Instruction) presenting information to the student is the?(a) Student model(b) Problem solving expertise(c) Tutoring module(d) All of the mentioned |
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Answer» Correct answer is (c) Tutoring module The explanation is: None. |
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| 6699. |
Special programs that assist programmers are called ____________(a) heuristic processors(b) symbolic programmers(c) intelligent programming tools(d) program recognizers |
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Answer» Correct choice is (c) intelligent programming tools The best I can explain: None. |
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| 6700. |
Which of the following function returns t if the object is a number in LISP?(a) (number )(b) (numberp )(c) (numericp )(d) (numeric ) |
| Answer» Right answer is (b) (numberp | |