The INCORRECT match in the following is :
Question: The INCORRECT match in the following is :$\Delta G^{\circ}0, K1$$\Delta \mathrm{G}^{\circ}=0, \mathrm{~K}=1$$\Delta \mathrm{G}^{\mathrm{o}}0, \mathrm{~K}1$$\Delta \mathrm{G}^{\circ}0, \mathrm{~K}1$Correct Option: 1 Solution: $\Delta \mathrm{G}^{\circ}=-\mathrm{RT} \ln k$ if $\mathrm{K}1 \Rightarrow \Delta \mathrm{G}^{\circ}0$...
Read More →What will be the major product when m-cresol is reacted with propargyl bromide
Question: What will be the major product when m-cresol is reacted with propargyl bromide $\left(\mathrm{HC} \equiv \mathrm{C}-\mathrm{CH}_{2} \mathrm{Br}\right)$ in present of $\mathrm{K}_{2} \mathrm{CO}_{3}$ in acetoneCorrect Option: , 4 Solution:...
Read More →Consider the following reactions :
Question: Consider the following reactions : 'A' is:$\mathrm{CH} \equiv \mathrm{CH}$$\mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{CH}$$\mathrm{CH}_{2}=\mathrm{CH}_{2}$$\mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{3}$Correct Option: , 2 Solution:...
Read More →A solution is prepared by dissolving
Question: A solution is prepared by dissolving $0.6 \mathrm{~g}$ of urea (molar mass $=60 \mathrm{~g} \mathrm{~mol}^{-1}$ ) and $1.8 \mathrm{~g}$ of glucose (molar mass $=180 \mathrm{~g} \mathrm{~mol}^{-1}$ ) in $100 \mathrm{~mL}$ of water at $27^{\circ} \mathrm{C}$. The osmotic pressure of the solution is: $\left(\mathrm{R}=0.08206 \mathrm{~L}\right.$ atm $\left.\mathrm{K}^{-1} \mathrm{~mol}^{-1}\right)$$4.92 \mathrm{~atm}$$1.64$ atm$2.46 \mathrm{~atm}$$8.2 \mathrm{~atm}$Correct Option: 1 Solut...
Read More →The compound used in the treatment of lead poisoning is :
Question: The compound used in the treatment of lead poisoning is :EDTACis-platinD-penicillaminedesferrioxime BCorrect Option: 1 Solution: (1) EDTA (ethylene diamine tetra acetate) is used for lead poisoning (2) Cis platin is used as a anti cancer drug (3) D-penicillamine is used for copper poisoning (4) desferrioxime $\mathrm{B}$ is used for iron poisoning...
Read More →Which one of the following is likely to give a
Question: Which one of the following is likely to give a precipitate with $\mathrm{AgNO}_{3}$ solution ?$\left(\mathrm{CH}_{3}\right)_{3} \mathrm{CCl}$$\mathrm{CHCl}_{3}$$\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{Cl}$$\mathrm{CCl}_{4}$Correct Option: 1 Solution: Reason :- Due to most stable carbocation formation tert-butyl chloride given the ppt immediately...
Read More →The correct statement is :
Question: The correct statement is :leaching of bauxite using concentrated $\mathrm{NaOH}$ solution gives sodium aluminate and sodium silicatethe blistered appearance of copper during the metallurgical process is due to the evolution of $\mathrm{CO}_{2}$pig iron is obtained from cast ironthe Hall-Heroult process is used for the production of aluminium and ironCorrect Option: 1 Solution: (1) During leaching when bauxite is treated with concentrated $\mathrm{NaOH}$, then sodium aluminate and sodiu...
Read More →The molar solubility of
Question: The molar solubility of $\mathrm{Cd}(\mathrm{OH})_{2}$ is $1.84 \times 10^{-5} \mathrm{M}$ in water. The expected solubility of $\mathrm{Cd}(\mathrm{OH})_{2}$ in a buffer solution of $\mathrm{pH}=12$ is :$6.23 \times 10^{-11} \mathrm{M}$$1.84 \times 10^{-9} \mathrm{M}$$\frac{2.49}{1.84} \times 10^{-9} \mathrm{M}$$2.49 \times 10^{-10} \mathrm{M}$Correct Option: , 4 Solution:...
Read More →The ratio of the shortest wavelength of two spectral series of hydrogen spectrum is found to be about 9
Question: The ratio of the shortest wavelength of two spectral series of hydrogen spectrum is found to be about 9 . The spectral series are:Paschen and P fundLyman and PaschenBrackett and PiundBalmer and BrackettCorrect Option: , 2 Solution:...
Read More →Solve this following
Question: The major product ' $Y^{\prime}$ in the following reaction is:- Correct Option: 1 Solution:...
Read More →Solve this following
Question: In chromatography, which of the following statements is INCORRECT for $\mathrm{R}_{f}$ ?$\mathrm{R}_{f}$ value depends on the type of chromatography.The value of $R_{f}$ can not be more than one.Higher $\mathrm{R}_{f}$ value means higher adsorption.$\mathrm{R}_{f}$ value is dependent on the mobile phase.Correct Option: , 3 Solution: Except (3) all are correct...
Read More →The highest possible oxidation states of uranium and plutonium, respectively, are :-
Question: The highest possible oxidation states of uranium and plutonium, respectively, are :-6 and 47 and 64 and 66 and 7Correct Option: , 4 Solution: The highest oxidation state of $\mathrm{U}$ and $\mathrm{Pu}$ is $6+$ and $7+$ respectively...
Read More →The major product obtained in the given reaction is :-
Question: The major product obtained in the given reaction is :- Correct Option: , 4 Solution:...
Read More →Solve this following
Question: The crystal fied stabilization energy (CFSE) of $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{2}$ and $\mathrm{K}_{2}\left[\mathrm{NiCl}_{4}\right]$, respectively, are :-$-0.4 \Delta_{\mathrm{O}}$ and $-0.8 \Delta_{\mathrm{t}}$$-0.4 \Delta_{\mathrm{O}}$ and $-1.2 \Delta_{\mathrm{t}}$$-2.4 \Delta_{\mathrm{O}}$ and $-1.2 \Delta_{\mathrm{t}}$$-0.6 \Delta_{\mathrm{O}}$ and $-0.8 \Delta_{\mathrm{t}}$Correct Option: 1 Solution:...
Read More →The mole fraction of a solvent in aqueous solution
Question: The mole fraction of a solvent in aqueous solution of a solute is $0.8$. The molality (in mol kg-1) of the aqueous solution is$13.88 \times 10^{-1}$$13.88 \times 10^{-2}$$13.88$$13.88 \times 10^{-3}$Correct Option: , 3 Solution:...
Read More →Solve this following
Question: Compound $\mathrm{A}\left(\mathrm{C}_{9} \mathrm{H}_{10} \mathrm{O}\right)$ shows positive iodoform test. Oxidation of $\mathrm{A}$ with $\mathrm{KMnO}_{4} / \mathrm{KOH}$ gives acid $\mathrm{B}\left(\mathrm{C}_{8} \mathrm{H}_{6} \mathrm{O}_{4}\right)$. Anhydride of $\mathrm{B}$ is used for the preparation of phenolphthalein. Compound $\mathrm{A}$ is :-Correct Option: 1 Solution:...
Read More →The major product of the following reaction
Question: The major product of the following reaction Correct Option: , 4 Solution:...
Read More →Enthalpy of sublimation of iodine is
Question: Enthalpy of sublimation of iodine is $24 \mathrm{cal} \mathrm{g}^{-1}$ at $200^{\circ} \mathrm{C}$. If specific heat of $\mathrm{I}_{2}(\mathrm{~s})$ and $\mathrm{I}_{2}$ (vap) are $0.055$ and $0.031 \mathrm{cal} \mathrm{} \mathrm{g}^{-1} \mathrm{~K}^{-1}$ respectively, then enthalpy of sublimation of iodine at $250^{\circ} \mathrm{C}$ in cal $g^{-1}$ is :$2.85$$11.4$$5.7$$22.8$Correct Option: , 4 Solution:...
Read More →Solve this following
Question: The major product ' $Y^{\prime}$ in the following reaction is: Correct Option: , 3 Solution:...
Read More →An organic compound 'A' is oxidized with
Question: An organic compound 'A' is oxidized with $\mathrm{Na}_{2} \mathrm{O}_{2}$ followed by boiling with $\mathrm{HNO}_{3}$. The resultant solution is then treated with ammonium molybdate to yield a yellow precipitate. Based on above observation, the element present in the given compound is :SulphurNitrogenFluorinePhosphorusCorrect Option: , 4 Solution:...
Read More →Air pollution that occurs in sunlight is :
Question: Air pollution that occurs in sunlight is : oxidising smogacid rainreducing smogfogCorrect Option: 1 Solution: Photochemical smog occurs in warm (sunlight) and has high concentration of oxidising agent therefore it is called photochemical smog/oxidising smog....
Read More →The basic structural unit of feldspar,
Question: The basic structural unit of feldspar, zeolites, mica, and asbestos is :$\left(\mathrm{SiO}_{3}\right)^{2-}$$\mathrm{SiO}_{2}$$\left(\mathrm{SiO}_{4}\right)^{4-}$Correct Option: , 3 Solution:...
Read More →The electrons are more likely to be found :
Question: The electrons are more likely to be found : in the region $a$ and $b$in the region a and $c$only in the region $c$only in the region aCorrect Option: , 2 Solution:...
Read More →Solve this following
Question: The minimum amount of $\mathrm{O}_{2}(\mathrm{~g})$ consumed per gram of reactant is for the reaction: (Given atomic mass : $\mathrm{Fe}=56, \mathrm{O}=16$, $\mathrm{Mg}=24, \mathrm{P}=31, \mathrm{C}=12, \mathrm{H}=1$ ) $\mathrm{C}_{3} \mathrm{H}_{8}(\mathrm{~g})+5 \mathrm{O}_{2}(\mathrm{~g}) \rightarrow 3 \mathrm{CO}_{2}(\mathrm{~g})+4 \mathrm{H}_{2} \mathrm{O}(l)$$\mathrm{P}_{4}(\mathrm{~s})+5 \mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{P}_{4} \mathrm{O}_{10}(\mathrm{~s})$$4 \mat...
Read More →The correct set of species responsible for the photochemical smog is :
Question: The correct set of species responsible for the photochemical smog is :$\mathrm{NO}, \mathrm{NO}_{2}, \mathrm{O}_{3}$ and hydrocarbons$\mathrm{N}_{2}, \mathrm{O}_{2}, \mathrm{O}_{3}$ and hydrocarbons$\mathrm{N}_{2}, \mathrm{NO}_{2}$ and hydrocarbons$\mathrm{CO}_{2}, \mathrm{NO}_{2}, \mathrm{SO}_{2}$ and hydrocarbonsCorrect Option: 1 Solution: The common component of photochemical smog are ozone,nitric oxide, acrolein, formaldehyde and peroxyacetyl nitrate (PAN)....
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