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Answers posted by mosymeow_1

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answered Apr 4, 2014
Answer: do not show Tyndall effectLyophilic colloids do not show Tyndall effect since the particles ...
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answered Apr 4, 2014
Answer: AssociatedMicelles are the cluster/aggregated particles formed by association of colloids in...
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answered Apr 4, 2014
Answer: Unstable natureColloidal solutions are filtrable, stable in nature and heterogeneous in char...
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answered Mar 18, 2014
Answer: $FeCl_3 + H_2O(excess) \longrightarrow Fe_2O_3.xH_2O | Fe^{3+}$If ferric chloride is added t...
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answered Mar 18, 2014
Answer: The particles of $As_2S_3$ are negatively charged and they move towards oppositely charged e...
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answered Mar 18, 2014
Answer: process of decomposing an emulsion back into its constituent liquids.De-emulsification is th...
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answered Mar 18, 2014
Answer: silica gelSilica gel is rigid and does not have the property of elasticity. It changes into ...
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answered Mar 18, 2014
Answer: ArgyrolColloidal sol of silver is called argyrol and is used as eye lotion.
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answered Mar 18, 2014
Answer: HumusIn the soil, the humus acts as a protective colloid. Because of the colloidal nature, s...
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answered Mar 17, 2014
Answer: Tyndall effectTail behind a comet is seen as Tyndall cone due to scattering of light by the ...
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answered Mar 17, 2014
Answer: $Al^{3+} > Ba^{2+} > Na^+$$As_2S_3$ ia a negative sol and therefore coagulating power ...
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answered Mar 17, 2014
Answer: both Scanning Transmission Electron Microscope & Scanning Tunneling Electron Microscope....
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answered Mar 17, 2014
Toolbox:Colour of a colloidal solution depends upon particles size and also the direction in which i...
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answered Mar 17, 2014
Toolbox:Colour of a colloidal solution depends upon the particle size.Answer: all the threeColour of...
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answered Mar 17, 2014
Toolbox:The only measurable colligative property of colloidal solution is osmotic pressure.Answer: o...
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answered Mar 17, 2014
Answer: true solutionAs the concentration of soap ($10^{-4} mol/L$) is less than its CMC value ($10^...
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answered Mar 17, 2014
Toolbox:Smaller the gold number, greater is the protective power.Answer: A < C < B < DSmall...
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answered Mar 17, 2014
Answer: The adsorption sites are equivalent in their ability to adsorb the particles.Langmuir adsorp...
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answered Mar 17, 2014
Answer: $N_2O_5$ : Haber Bosch processHaber Bosch process is used for the synthesis of ammonia. The ...
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answered Mar 17, 2014
Answer: 1/nFor the adsorption of a gas on a solid $\frac{x}{m} = kp^{1/n}$ This equation is known as...
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answered Mar 17, 2014
Answer: 1$2[AgI]I^- + Pb^{2+} \longrightarrow PbI_2 + 2AgI$Thus, 2 moles of $[AgI]I^-$ are coagulate...
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answered Mar 17, 2014
Toolbox:According to Freundlich isotherm, $\frac{x}{m} = kp^{1/n}$According to Langmuir isotherm, $\...
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answered Mar 17, 2014
Answer: 100200 mL of the sol needs = $\large\frac{0.73}{36.5 g/mol}$ = 0.02 mol = 20 m mol1000 mL of...
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answered Mar 17, 2014
Toolbox:According to Langmuir isotherm $\frac{x}{m} = \frac{ap}{(1+bp)}$Answer: $\frac{x}{m} = \frac...
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answered Mar 17, 2014
Answer: Calcium phosphide$Ca_3P_2 + 6H_2O \longrightarrow 3Ca(OH)_2 + 2PH_3$Phosphene ($PH_3$) so fo...
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answered Mar 16, 2014
Answer: Benzene (an oily substance) and water will form an emulsion in the presence of a micelle for...
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answered Mar 16, 2014
Answer: Dodecyl trimethyl ammonium chlorideDodecyl trimethyl ammonium chloride $[C_{12}H_{25}N^+(CH_...
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answered Mar 16, 2014
Answer: $\frac{V_c}{V_s} \approx 10^{3}$For a true solution, the diameter range is 1 to < 10 $\ov...
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answered Mar 16, 2014
Answer: $Ti^{3+}$$Ti^{3+}$ species from $TiCl_3$ compound having active site vacant which accomodat...
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answered Mar 16, 2014
Answer: Formaldehyde solutionFormaldehyde kills the micro-organisms which spoils the milk by produci...
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answered Feb 28, 2014
Answer: -208.1 kJ/molEnthalpy of hydrogentaion of cyclohexene = -119.5 kJ/mol$\therefore$ calculated...
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answered Feb 28, 2014
Answer: 1238.78 J/mol$C(s) + 1/2 O_2 (g) \longrightarrow CO(g)$$\Delta n_g = 1-\frac{1}{2} = \frac{1...
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0 votes
answered Feb 28, 2014
Answer: T - $\frac{2}{3\times 0.0821}$Here $P_{ext} = 1 atm$$V_1$ = 1 L and $V_2$ = 2 LR = 0.0821 L ...
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answered Feb 28, 2014
Answer: 400 K$\Delta H$ = 30 kJ/mol = 30,000 J/mol$\Delta S$ = 75 $Jmol^{-1}K^{-1}$At boiling point,...
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answered Feb 28, 2014
Answer: $\frac{1}{2}H_2(g) + \frac{1}{2}F_2(g) \rightarrow HF(g)$Standard enthalpy of formation is e...
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answered Feb 28, 2014
Answer: -121 kJ/mol$C_6H_{12} + 9 O_2 \rightarrow 6CO_2 + 6H_2O$ ; $\Delta H_1= -3920$ kJ/mol$C_6H_{...
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answered Feb 28, 2014
Answer: 100 $Jmol^{-1}K^{-1}$ Liquid water $\rightarrow $ steam$\Delta G^{\circ} = \Delta H^\circ - ...
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answered Feb 28, 2014
Answer: EthaneGas with highest number of C atoms and having all single bond should have highest valu...
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answered Feb 28, 2014
Answer: It can be made spontaneous by decreasing the pressure at 298 K.For the reaction to be sponta...
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answered Feb 28, 2014
Answer: -veDevitrification of glass is the onset of crystallisation in a super cooled liquid. The pr...
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answered Feb 28, 2014
Answer: always an exothermic processDissolution of gases in water is a spontaneous process. As such ...
0 votes
answered Feb 27, 2014
Answer: $\Delta H < \Delta E$At 298 K, $CH_4(g) + 2O_2(g) \rightarrow CO_2(g) + 2H_2O(l)$$\Delta ...
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