The major product of the following reaction is :-
Question: The major product of the following reaction is :- Correct Option: , 3 Solution:...
Read More →A process will be spontaneous at all temperatures if :-
Question: A process will be spontaneous at all temperatures if :-$\Delta \mathrm{H}0$ and $\Delta \mathrm{S}0$$\Delta H0$ and $\Delta S0$$\Delta \mathrm{H}0$ and $\Delta \mathrm{S}0$$\Delta \mathrm{H}0$ and $\Delta \mathrm{S}0$Correct Option: , 2 Solution: $\Delta \mathrm{G}=\Delta \mathrm{H}-\mathrm{T} \Delta \mathrm{S}$ for spontaneous process at all temp. $\Delta \mathrm{G}0$ and it is possible when $\Delta \mathrm{H}0$ and $\Delta \mathrm{S}0$....
Read More →HF has highest boiling point among hydrogen halides,
Question: HF has highest boiling point among hydrogen halides, because it has :lowest dissociation enthalpystrongest van der Waals' interactionsstrongest hydrogen bondinglowest ionic characterCorrect Option: , 3 Solution: HF has highest boiling point among hydrogen halides because it has strongest hydrogen bonding...
Read More →The layer of atmosphere between
Question: The layer of atmosphere between $10 \mathrm{~km}$ to $50 \mathrm{~km}$ above the sea level is called as :tropospheremesospherestratospherethermosphereCorrect Option: , 3 Solution: It's a fact, the layer of atmosphere between $10 \mathrm{~km}$ to $50 \mathrm{~km}$ above sea level is called as stratosphere....
Read More →The synonym for water gas when used in the production of methanol is :-
Question: The synonym for water gas when used in the production of methanol is :- natural gaslaughing gassyn gasfuel gasCorrect Option: , 3 Solution:...
Read More →Hinsberg's reagent is :
Question: Hinsberg's reagent is :$\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{SO}_{2} \mathrm{Cl}$$\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COCl}$$\mathrm{SOCl}_{2}$$(\mathrm{COCl})_{2}$Correct Option: 1 Solution:...
Read More →At room temperature, a dilute soluton of urea is prepared by dissolving
Question: At room temperature, a dilute soluton of urea is prepared by dissolving $0.60 \mathrm{~g}$ of urea in $360 \mathrm{~g}$ of water. If the vapour pressure of pure water at this temperature is $35 \mathrm{mmHg}$, lowering of vapour pressure will be (molar mass of urea $=60 \mathrm{~g} \mathrm{~mol}^{-1}$ ):-$0.027 \mathrm{mmHg}$$0.028 \mathrm{mmHg}$$0.017 \mathrm{mmHg}$$0.031 \mathrm{mmHg}$Correct Option: , 3 Solution:...
Read More →Noradrenaline is a /an
Question: Noradrenaline is a /anNeurotransmitterAntidepressantAntihistamineAntacidCorrect Option: 1 Solution: Nor adrenaline is a neutro transmitter and it belongs to catecholamine family that fanctions in brain \ body as a hermone \ neutro transmitter....
Read More →Solve this following
Question: The graph betweeen $|\psi|^{2}$ and $\mathrm{r}$ (radial distance) is shown below. This represents :- $3 \mathrm{~s}$ orbitalIs orbital$2 p$ orbital$2 \mathrm{~s}$ orbitalCorrect Option: , 4 Solution:...
Read More →Molal depression constant for a solvent is
Question: Molal depression constant for a solvent is $4.0 \mathrm{~kg} \mathrm{~mol}^{-1}$. The depression in the freezing point of the solvent for $0.03 \mathrm{~mol} \mathrm{} \mathrm{kg}^{-1}$ solution of $\mathrm{K}_{2} \mathrm{SO}_{4}$ is : (Assume complete dissociation of the electrolyte)$0.12 \mathrm{~K}$$0.36 \mathrm{~K}$$0.18 \mathrm{~K}$$0.24 \mathrm{~K}$Correct Option: , 2 Solution:...
Read More →The increasing order of the reactivity of the following compounds towards
Question: The increasing order of the reactivity of the following compounds towards electrophilic aromatic substitution reactions is :- $\mathrm{I}\mathrm{III}\mathrm{II}$$\mathrm{II}\mathrm{I}\mathrm{III}$$\mathrm{III}\mathrm{I}\mathrm{II}$$\mathrm{III}\mathrm{II}\mathrm{I}$Correct Option: , 3 Solution: Rate of aromatic electophilic substitution is...
Read More →The maximum number of possible oxidation states of actinoides are shown by
Question: The maximum number of possible oxidation states of actinoides are shown byberkelium (Bk) and californium (Cf)nobelium (No) and lawrencium (Lr)actinium (Ac) and thorium (Th)neptunium (Np) and plutonium (Pu)Correct Option: , 4 Solution: $\mathrm{Np}$ and $\mathrm{Pu}$ show maximum no. of oxidations states starting from $+3$ to $+7$ all oxidation states....
Read More →The major product of the following reaction is:
Question: The major product of the following reaction is: Correct Option: , 3 Solution:...
Read More →Consider the following table :
Question: Consider the following table : a and $b$ are vander waals constant. The correct statement about the gases is :Gas C will occupy lesser volume than gas A; gas B will be lesser compressible than gas DGas $C$ will occupy more volume than gas A; gas B will be lesser compressible than gas DGas C will occupy more volume than gas $A$; gas $B$ will be more compressible than gas DGas $C$ will occupy lesser volume than gas $A$; gas $\mathrm{B}$ will be more compressible than gas DCorrect Option:...
Read More →Which of the following potential energy (PE)
Question: Which of the following potential energy (PE) diagrams represents the $S_{N} 1$ reaction?Correct Option: , 4 Solution: PE diagram for $S_{N} 1$ $S_{N}$ lis two step reaction where in step (1) formation of carbocation is RDS...
Read More →The structures of beryllium chloride in the solid state
Question: The structures of beryllium chloride in the solid state and vapour, phase, respectively, are :chain and dimericchain and chaindimeric and dimericdimeric and chainCorrect Option: 1 Solution:...
Read More →Solve this following
Question: Increasing rate of $S_{N} 1$ reaction in the following compounds is : $(\mathrm{A})(\mathrm{B})(\mathrm{C})(\mathrm{D})$$(\mathrm{B})(\mathrm{A})(\mathrm{D})(\mathrm{C})$$(\mathrm{B})(\mathrm{A})(\mathrm{C})(\mathrm{D})$$(\mathrm{A})(\mathrm{B})(\mathrm{D})(\mathrm{C})$Correct Option: , 3 Solution: Rate of $\mathrm{S}_{\mathrm{N}^{*}}$ is directly proposional to stability of first formed carbocation so answer is...
Read More →In the following reaction
Question: In the following reaction Rate of the reaction is the highest for : Acetone as substrate and methanol in stoichiometric amountPropanal as substrate and methanol in stoichiometric amount.Acetone as substrate and methanol in excessPropanal as substrate and methanol in excessCorrect Option: , 4 Solution:...
Read More →A solution of
Question: A solution of $\mathrm{Ni}\left(\mathrm{NO}_{3}\right)_{2}$ is electrolysed between platinum electrodes using $0.1$ Faraday electricity. How many mole of Ni will be deposited at the cathode?$0.20$$0.05$$0.10$$0.15$Correct Option: , 2 Solution:...
Read More →Solve this following
Question: During the change of $\mathrm{O}_{2}$ to $\mathrm{O}_{2}^{-}$, the incoming electron goes to the orbital: $\sigma^{*} 2 P_{z}$$\pi^{2} \mathrm{P}_{\mathrm{y}}$$\pi^{2} 2 \mathrm{P}_{\mathrm{x}}$$\pi^{2} \mathrm{P}_{x}$Correct Option: , 3 Solution: Molecular orbital diagram of $\mathrm{O}_{2}$ is An incoming electron will go in $\pi_{2 p_{x}}^{*}$ orbital....
Read More →At a given temperature
Question: At a given temperature $\mathrm{T}$, gases Ne, Ar, Xe and $\mathrm{Kr}$ are found to deviate from ideal gas behaviour. Their equation of state is given as $\mathrm{p}=\frac{\mathrm{RT}}{\mathrm{V}-\mathrm{b}}$ at $\mathrm{T}$ Here, b is the van der Waals constant. Which gas will exhibit steepest increase in the plot of $\mathrm{Z}$ (compression factor) vs p?$\mathrm{Ne}$$\mathrm{Ar}$$\mathrm{Xe}$$\mathrm{Kr}$Correct Option: , 3 Solution:...
Read More →Consider the given plot of enthalpy of
Question: Consider the given plot of enthalpy of the following reaction between $\mathrm{A}$ and $\mathrm{B}$. $\mathrm{A}+\mathrm{B} \rightarrow \mathrm{C}+\mathrm{D}$ Identify the incorrect statement. $\mathrm{C}$ is the thermodynamically stable product.Formation of $\mathrm{A}$ and $\mathrm{B}$ from $\mathrm{C}$ has highest enthalpy of activation.D is kinetically stable product.Activation enthalpy to form $\mathrm{C}$ is $5 \mathrm{~kJ} \mathrm{~mol}^{-1}$ less than that to form D.Correct Opt...
Read More →Solve this following
Question: Three complexes, $\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\right)_{5}\right]^{2+}(\mathrm{I})$, $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{H}_{2} \mathrm{O}\right]^{3+}$ (II) and $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$ (III) absorb light in the visible region. The correct order of the wavelength of light absorbed by them is :$(\mathrm{III})(\mathrm{I})(\mathrm{II})$$(\mathrm{I})(\mathrm{II})(\mathrm{III})$(II) $$ (I) $$ (III)$(\mathrm{III})(\math...
Read More →10 ml of 1mM surfactant solution forms a monolayer covering
Question: $10 \mathrm{~mL}$ of $1 \mathrm{mM}$ surfactant solution forms a monolayer covering $0.24 \mathrm{~cm}^{2}$ on a polar substrate. If the polar head is approximated as cube, what is its edge length?$2.0 \mathrm{pm}$$2.0 \mathrm{~nm}$$1.0 \mathrm{pm}$$0.1 \mathrm{~nm}$Correct Option: 1 Solution:...
Read More →A gas undergoes physical adsorption on a surface and follows the given Freundlich adsorption isotherm equation
Question: A gas undergoes physical adsorption on a surface and follows the given Freundlich adsorption isotherm equation $\frac{\mathrm{x}}{\mathrm{m}}=\mathrm{kp}^{0.5}$ Adsorption of the gas increases with :Decrease in $\mathrm{p}$ and decrease in $\mathrm{T}$Increase in $\mathrm{p}$ and increase in $\mathrm{T}$Increase in $\mathrm{p}$ and decrease in $\mathrm{T}$Decrease in $\mathrm{p}$ and increase in $\mathrm{T}$Correct Option: , 3 Solution:...
Read More →