Consider the reversible isothermal expansion of an ideal gas in a closed
Question: Consider the reversible isothermal expansion of an ideal gas in a closed system at two different temperatures $\mathrm{T}_{1}$ and $\mathrm{T}_{2}\left(\mathrm{~T}_{1}\mathrm{T}_{2}\right)$. The correct graphical depiction of the dependence of work done (w) on the final volume (V) is:Correct Option: , 2 Solution:...
Read More →The value of
Question: The value of $\mathrm{K}_{\mathrm{p}} / \mathrm{K}_{\mathrm{C}}$ for the following reactions at $300 \mathrm{~K}$ are, respectively : (At $300 \mathrm{~K}, \mathrm{RT}=24.62 \mathrm{dm}^{3} \mathrm{~atm} \mathrm{} \mathrm{mol}^{-1}$ ) $\mathrm{N}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}(\mathrm{g})$ $\mathrm{N}_{2} \mathrm{O}_{4}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}_{2}(\mathrm{~g})$ $\mathrm{N}_{2}(\mathrm{~g})+3 \mathrm{H}_{2}(\mathrm{~g}...
Read More →Solve this following
Question: $0.5$ moles of gas A and $x$ moles of gas B exert a pressure of $200 \mathrm{~Pa}$ in a a container of volume $10 \mathrm{~m}^{3}$ at $1000 \mathrm{~K}$. given $\mathrm{R}$ is the gas constant in $\mathrm{JK}^{-1} \mathrm{~mol}^{-1} \mathrm{~m}, \mathrm{x}$ is :$\frac{2 R}{4+12}$$\frac{2 R}{4-R}$$\frac{4-R}{2 R}$$\frac{4+R}{2 R}$Correct Option: , 3 Solution:...
Read More →Hall-Heroult's process is given by "
Question: Hall-Heroult's process is given by "$\mathrm{Cr}_{2} \mathrm{O}_{3}+2 \mathrm{Al} \rightarrow \mathrm{Al}_{2} \mathrm{O}_{3}+2 \mathrm{Cr}$$\mathrm{Cu}^{2+}$ (aq.) $+\mathrm{H}_{2}(\mathrm{~g}) \rightarrow \mathrm{Cu}(\mathrm{s})+2 \mathrm{H}^{+}$(aq)$\mathrm{ZnO}+\mathrm{C} \stackrel{\text { Coke,1673K }}{\longrightarrow} \mathrm{Zn}+\mathrm{CO}$$2 \mathrm{Al}_{2} \mathrm{O}_{3}+3 \mathrm{C} \rightarrow 4 \mathrm{Al}+3 \mathrm{CO}_{2}$Correct Option: , 4 Solution: In Hall-Heroult's pr...
Read More →Solve this following
Question: $20 \mathrm{~mL}$ of $0.1 \mathrm{MH}_{2} \mathrm{SO}_{4}$ solution is added to 30 $\mathrm{mL}$ of $0.2 \mathrm{M} \mathrm{NH}_{4} \mathrm{OH}$ solution. The $\mathrm{pH}$ of the resulatant mixture is : $\left[\mathrm{pk}_{\mathrm{b}}\right.$ of $\left.\mathrm{NH}_{4} \mathrm{OH}=4.7\right]$.$9.4$$5.0$$9.0$$5.2$Correct Option: , 3 Solution:...
Read More →The total number of isomers for a square planar
Question: The total number of isomers for a square planar complex $\left[\mathrm{M}(\mathrm{F})(\mathrm{Cl})(\mathrm{SCN})\left(\mathrm{NO}_{2}\right)\right]$ is :128164Correct Option: 1 Solution: The total number of isomers for a square planar complex $\left[\mathrm{M}(\mathrm{F})(\mathrm{Cl})(\mathrm{SCN})\left(\mathrm{NO}_{2}\right)\right]$ is 12 ....
Read More →The highest value of the calculated spin only magnetic moment (in BM) among all the transition metal complexs is:
Question: The highest value of the calculated spin only magnetic moment (in BM) among all the transition metal complexs is:$5.92$$3.87$$6.93$$4.90$Correct Option: 1 Solution:...
Read More →The major product of the following reaction is
Question: The major product of the following reaction is Correct Option: , 3 Solution: Example of $E_{2}$ elimination and conjugated diene is formed with phenyl ring in conjugation which makes it very stable....
Read More →Major product of the following reaction is :
Question: Major product of the following reaction is : Correct Option: , 4 Solution:...
Read More →The total number of isotopes of hydrogen
Question: The total number of isotopes of hydrogen and number of radioactive isotopes among them, respectively, are :2 and 03 and 23 and 12 and 1Correct Option: , 3 Solution: Total number of isotopes of hydrogen is 3 $\Rightarrow{ }_{1}^{1} \mathrm{H},{ }_{1}^{2} \mathrm{H}$ or ${ }_{1}^{2} \mathrm{D},{ }_{1}^{3} \mathrm{H}$ or ${ }_{1}^{3} \mathrm{~T}$ and only ${ }_{1}^{3} \mathrm{H}$ or ${ }_{1}^{3} \mathrm{~T}$ is an Radioactive element....
Read More →Wilkinson catalyst is :
Question: Wilkinson catalyst is :$\left[\left(\mathrm{Ph}_{3} \mathrm{P}\right)_{3} \mathrm{RhCl}\right]$ $\left(\mathrm{Et}=\mathrm{C}_{2} \mathrm{H}_{5}\right)$$\left.\left[\mathrm{Et}_{3} \mathrm{P}\right)_{3} \mathrm{IrCl}\right]$$\left.\left[\mathrm{Et}_{3} \mathrm{P}\right)_{3} \mathrm{RhCl}\right]$$\left.\left[\mathrm{Ph}_{3} \mathrm{P}\right)_{3} \mathrm{IrCl}\right]$Correct Option: 1 Solution: Wilkinsion catalyst is $\left[\left(\mathrm{ph}_{3} \mathrm{P}\right)_{3} \mathrm{RhCl}\right]...
Read More →Which premitive unit cell has unequal edge lenghs
Question: Which premitive unit cell has unequal edge lenghs $(a \neq b \neq c)$ and all axial angles differetn from $90^{\circ}$ ?TetragonalHexagonalMonoclinicTriclinicCorrect Option: , 4 Solution: In Triclinic unit cell $a \neq b \neq c \ \alpha \neq \beta \neq \gamma \neq 90^{\circ}$...
Read More →The alkaline earth metal nitrate that does not crystallise with water molecules, is :
Question: The alkaline earth metal nitrate that does not crystallise with water molecules, is :$\mathrm{Sr}\left(\mathrm{NO}_{3}\right)_{2}$$\mathrm{Mg}\left(\mathrm{NO}_{3}\right)_{2}$$\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2}$$\mathrm{Ba}\left(\mathrm{NO}_{3}\right)_{2}$Correct Option: , 4 Solution:...
Read More →Which dicarboxylic acid in presence of a dehydrating
Question: Which dicarboxylic acid in presence of a dehydrating agent is least reactive to give an anhydride :Correct Option: 4, Solution: Adipic acid $\mathrm{CO}_{2} \mathrm{H}-\left(\mathrm{CH}_{2}\right)_{4}-\mathrm{CO}_{2} \mathrm{H} \underset{\text { dehydrating }}{\stackrel{\text { agent }}{\longrightarrow}}$ 7 membered cyclic anhydride (Very unstable)...
Read More →The major product the following reaction is:
Question: The major product the following reaction is: Correct Option: , 4 Solution:...
Read More →The chemical nature of hydrogen preoxide is :-
Question: The chemical nature of hydrogen preoxide is :-Oxidising and reducing agent in acidic medium, but not in basic medium.Oxidising and reducing agent in both acidic and basic mediumReducing agent in basic medium, but not in acidic mediumOxidising agent in acidic medium, but not in basic medium.Correct Option: 2, Solution: $\mathrm{H}_{2} \mathrm{O}_{2}$ act as oxidising agent and reducing agent in acidic medium as well as basic medium. $\mathrm{H}_{2} \mathrm{O}_{2}$ Act as oxidant :- $\ma...
Read More →For emission line of atomic hydrogen from
Question: For emission line of atomic hydrogen from $\mathrm{n}_{\mathrm{i}}=8$ to $\mathrm{n}_{\mathrm{f}}=$ the plot of wave number $(\bar{v})$ against $\left(\frac{1}{n^{2}}\right)$ will be (The Ry dberg constant, $\mathrm{R}_{\mathrm{H}}$ is in wave number unit).Linear with slope $-\mathrm{R}_{\mathrm{H}}$Linear with intercept $-\mathrm{R}_{\mathrm{H}}$Non linearLinear with sslope $R_{H}$Correct Option: , 4 Solution:...
Read More →Correct statements among a to $d$ regarding silicones are :
Question: Correct statements among a to $d$ regarding silicones are : (a) They are polymers with hydrophobic character (b) They are biocompatible. (c) In general, they have high thermal stability and low dielectric strenth. (d) Usually, they are resistant to oxidation and used as greases.(a), (b) and (c) only(a), and (b) only(a), (b), (c) and (d)(a), (b) and (d) onlyCorrect Option: , 3 Solution:...
Read More →Two pi and half sigma bonds are present in:
Question: Two pi and half sigma bonds are present in:$\mathrm{N}_{2}^{+}$$\mathrm{N}_{2}$$\mathrm{O}_{2}^{+}$$\mathrm{O}_{2}$Correct Option: 1, Solution: $\mathrm{N}_{2}^{\oplus} \Rightarrow \mathrm{BO}=2.5 \Rightarrow\left[\pi-\right.$ Bond $=2 \ \sigma-$ Bond $\left.=\frac{1}{2}\right]$ $\mathrm{N}_{2} \Rightarrow$ B.O. $=3.0 \Rightarrow[\pi-$ Bond $=2 \ \sigma-$ Bond $=1]$ $\mathrm{O}_{2}^{\oplus}=$ B.O. $\Rightarrow 2.5 \Rightarrow[\pi$-Bond $=1.5 \ \sigma$-Bond $=1]$ $\mathrm{O}_{2} \Righta...
Read More →Adsorption of a gas follows Freundlich adsorption isotherm.
Question: Adsorption of a gas follows Freundlich adsorption isotherm. In the given plot, $x$ is the mass of the gas adsorbed on mass $m$ of the adsorbent at pressure p. $\frac{\mathrm{x}}{\mathrm{m}}$ is proportional to $\mathrm{P} \frac{1}{4}$$\mathrm{P}^{2}$$P$$\mathrm{P} \frac{1}{2}$Correct Option: , 4 Solution:...
Read More →Solve this following
Question: Two complexes $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}_{6}\right) \mathrm{Cl}_{3}\right]$ (A) and $\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right] \mathrm{Cl}_{3}(\mathrm{~B})$ are violet and yellow coloured, respectively. The incorrect statement regarding them is :$\Delta_{0}$ value of $(\mathrm{A})$ is less than that of $(\mathrm{B})$.$\Delta_{0}$ value of (A) and (B) are calculated from the energies of violet and yellow light, respectivelyBothe absorb energies corr...
Read More →The correct decreasing order for acid strength is :-
Question: The correct decreasing order for acid strength is :-$\mathrm{NO}_{2} \mathrm{CH}_{2} \mathrm{COOH}\mathrm{NCCH}_{2} \mathrm{COOH}$ $\mathrm{FCH}_{2} \mathrm{COOH}\mathrm{CICH}_{2} \mathrm{COOH}$$\mathrm{FCH}_{2} \mathrm{COOH}\mathrm{NCCH}_{2} \mathrm{COOH}$ $\mathrm{NO}_{2} \mathrm{CHCOOH}\mathrm{CICH}_{2} \mathrm{COOH}$$\mathrm{NO}_{2} \mathrm{CH}_{2} \mathrm{COOH}\mathrm{FCH}_{2} \mathrm{COOH}$ $\mathrm{CNCH}_{2} \mathrm{COOH}\mathrm{CICH}_{2} \mathrm{COOH}$$\mathrm{CNCH}_{2} \mathrm...
Read More →Which one of the following statements regarding Henry's law not correct ?
Question: Which one of the following statements regarding Henry's law not correct ?The value of $\mathrm{K}_{\mathrm{H}}$ increases with function of the nature of the gasHigher the value of $\mathrm{K}_{\mathrm{H}}$ at a given pressure, higher is the solubility of the gas in the liquids.The partial of the gas in vapour phase is proportional to the mole fraction of the gas in the solution.Different gases have different $\mathrm{K}_{\mathrm{H}}$ (Henry's law constant) values at the same temneratur...
Read More →A particle of mass
Question: A particle of mass $\mathrm{m}$ is at rest at the origin at time $\mathrm{t}=0$. It is subjected to a force $\mathrm{F}(\mathrm{t})=\mathrm{F}_{0} \mathrm{e}^{-\mathrm{bt}}$ in the $x$ direction. Its speed $v(t)$ is depicted by which of the following curves ?Correct Option: , 3 Solution:...
Read More →Two fixed frictionless
Question: Two fixed frictionless inclined planes making an angle $30^{\circ}$ and $60^{\circ}$ with the vertical are shown in the figure. Two blocks $A$ and $B$ are placed on the two planes. What is the relative vertical acceleration of A with respect to $B$ ? $4.9 \mathrm{~ms}^{-2}$ in vertical direction.$4.9 \mathrm{~ms}^{-2}$ in horizontal direction$9.8 \mathrm{~ms}^{-2}$ in vertical directionZeroCorrect Option: 1 Solution:...
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