Mesityl oxide is a common name of :
Question: Mesityl oxide is a common name of : 2,4 -Dimethyl pentan-3-one3-Methyl cyclohexane carbaldehyde2-Methyl cyclohexanone4-Methyl pent-3-en-2-oneCorrect Option: , 4 Solution: IUPAC [4-Methylpent-3-en-2-one]...
Read More →Assertion A : Enol form of acetone
Question: Assertion A : Enol form of acetone $\left[\mathrm{CH}_{3} \mathrm{COCH}_{3}\right]$ exists in $0.1 \%$ quantity. However, the enol form of acetyl acetone $\left[\mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{OCCH}_{3}\right]$ exists in approximately $15 \%$ quantity. Reason R : enol form of acetyl acetone is stabilized by intramolecular hydrogen bonding, which is not possible in enol form of acetone. Choose the correct statementA is false but R is trueBoth A and R are true and R is the corr...
Read More →The total number of amines among the following
Question: The total number of amines among the following which can be synthesized by Gabriel synthesis is Solution: Gabriel phthalimide synthesis is used to prepare $1^{\circ}$ aliphatic/alicyclic amine in common. Hence amine which can synthesised by Gabriel phthalimide synthesis method is : (A) $\mathrm{Me}_{2} \mathrm{CH}-\mathrm{CH}_{2}-\mathrm{NH}_{2}$ (B) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}$ (C) $\mathrm{Ph}-\mathrm{CH}_{2}-\mathrm{NH}_{2}$...
Read More →The type of pollution that gets increased during the day time and in the presence of O3 is :
Question: The type of pollution that gets increased during the day time and in the presence of $\mathrm{O}_{3}$ is :Reducing smogOxidising smogGlobal warmingAcid rainCorrect Option: , 2 Solution: In presence of ozone $\left(\mathrm{O}_{3}\right)$, oxidising smog gets increased during the day time because automobiles and factories produce main components of the photochemcial smog (oxidising smog) results from the action of sunlight on unsaturated hydrocarbon and nitrogen oxide. Ozone is strong ox...
Read More →Hoffmann bromomide degradation of benzamide gives product
Question: Hoffmann bromomide degradation of benzamide gives product $A$, which upon heating with $\mathrm{CHCl}_{3}$ and $\mathrm{NaOH}$ gives product B. The structures of $\mathrm{A}$ and $\mathrm{B}$ are :Correct Option: , 2 Solution: Hoffmann bromamide degradation reaction :...
Read More →Given below are two statements :
Question: Given below are two statements : Statement $\mathrm{I}: \mathrm{H}_{2} \mathrm{O}_{2}$ can act as both oxidising and reducing agent in basic medium. Statement II : In the hydrogen economy, the energy is transmitted in the form of dihydrogen. In the light of the above statements, choose the correct answer from the options given below :Both statement I and statement II are falseBoth statement I and statement II are trueStatement I is true but statement II is falseStatement I is false but...
Read More →Reducing smog is a mixture of:
Question: Reducing smog is a mixture of:Smoke, fog and $\mathrm{O}_{3}$Smoke, fog and $\mathrm{SO}_{2}$Smoke, fog and $\mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CHO}$Smoke, fog and $\mathrm{N}_{2} \mathrm{O}_{3}$Correct Option: , 2 Solution: Reducing or classical smog is the combination of smoke, fog and $\mathrm{SO}_{2}$....
Read More →Match the list -I with list - II
Question: Match the list -I with list - II (a) - (ii), (b) - (iv), (c) - (i), (d) - (iii)(a) - (iv), (b) - (i),(c) - (ii), (d) - (iii)(a) - (iv), (b) - (iii),(c) - (i), (d) - (ii)(a) - (ii), (b) - (iv), (c) - (iii), (d) - (i)Correct Option: 1 Solution:...
Read More →The total number of amines among the following
Question: The total number of amines among the following which can be synthesized by Gabriel synthesis is$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}$Correct Option: 3, Solution: Gabriel phthalimide synthesis is used to prepare $1^{\circ}$ aliphatic/alicyclic amine in common. Hence amine which can synthesised by Gabriel phthalimide synthesis method is: (A) $\mathrm{Me}_{2} \mathrm{CH}-\mathrm{CH}_{2}-\mathrm{NH}_{2}$ (B) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{NH}_{2}$ (C) $\mathrm{Ph}-\mat...
Read More →A non-reducing sugar "A" hydrolyses to give
Question: A non-reducing sugar "A" hydrolyses to give two reducing mono saccharides. Sugar A is-FructoseGalactoseGlucoseSucroseCorrect Option: , 4 Solution:...
Read More →solve this
Question: The product "A" and "B" formed in above reactions are :Correct Option: , 3 Solution:...
Read More →Which of the following compound CANNOT act as a Lewis base?
Question: Which of the following compound CANNOT act as a Lewis base?$\mathrm{NF}_{3}$$\mathrm{PCl}_{5}$$\mathrm{SF}_{4}$$\mathrm{ClF}_{3}$Correct Option: , 2 Solution: Lewis base : Chemical species which has capability to donate electron pair. In $\mathrm{NF}_{3}, \mathrm{SF}_{4}, \mathrm{ClF}_{3}$ central atom (i.e. $\mathrm{N}, \mathrm{S}, \mathrm{Cl}$ ) having lone pair therefore act as lewis base. In $\mathrm{PCl}_{5}$ central atom $(\mathrm{P})$ does not have lone pair therefore does not a...
Read More →Which of the following is Lindlar catalyst ?
Question: Which of the following is Lindlar catalyst ?Zinc chloride and HClCold dilute solution of $\mathrm{KMnO}_{4}$Sodium and Liquid $\mathrm{NH}_{3}$Partially deactivated palladised charcoalCorrect Option: , 4 Solution: Partially deactivated palladised charcoal $\left(\mathrm{H}_{2} / \mathrm{pd} / \mathrm{CaCO}_{3}\right)$ is lindlar catalyst....
Read More →The absolute value of the electron gain enthalpy of halogens satisfies:
Question: The absolute value of the electron gain enthalpy of halogens satisfies:$\mathrm{I}\mathrm{Br}\mathrm{Cl}\mathrm{F}$$\mathrm{Cl}\mathrm{Br}\mathrm{F}\mathrm{I}$$\mathrm{Cl}\mathrm{F}\mathrm{Br}\mathrm{I}$$\mathrm{F}\mathrm{Cl}\mathrm{Br}\mathrm{I}$Correct Option: , 3 Solution: Order of electron gain enthalpy (Absolute value) $\mathrm{Cl}\mathrm{F}\mathrm{Br}\mathrm{I}$...
Read More →Reagent, 1-naphthylamine and sulphanilic acid
Question: Reagent, 1-naphthylamine and sulphanilic acid in acetic acid is used for the detection of$\mathrm{N}_{2} \mathrm{O}$$\mathrm{NO}_{3}{ }^{-}$NO$\mathrm{NO}_{2}^{-}$Correct Option: , 4 Solution: For detection of $\mathrm{NO}_{2}^{-}$, the following test is used. $\mathrm{NO}_{2}^{-}+\mathrm{CH}_{3} \mathrm{COOH} \rightarrow \mathrm{HNO}_{2}+\mathrm{CH}_{3} \mathrm{COO}^{-}$...
Read More →The correct set from the following in which both
Question: The correct set from the following in which both pairs are in correct order of melting point is :-$\mathrm{LiF}\mathrm{LiCl} ; \mathrm{MgO}\mathrm{NaCl}$$\mathrm{LiCl}\mathrm{LiF} ; \mathrm{NaCl}\mathrm{MgO}$$\mathrm{LiF}\mathrm{LiCl} ; \mathrm{NaCl}\mathrm{MgO}$$\mathrm{LiCl}\mathrm{LiF} ; \mathrm{MgO}\mathrm{NaCl}$Correct Option: 1, Solution: L.E. $\propto$ M.P. L.E. : LiF LiCl, $\mathrm{MgO}\mathrm{NaCl}$...
Read More →The functions of antihistamine are :
Question: The functions of antihistamine are :Antiallergic and AnalgesicAntacid and antiallergicAnalgesic and antacidAntiallergic and antidepressantCorrect Option: , 2 Solution: 2...
Read More →Reaction of Grignard reagent,
Question: Reaction of Grignard reagent, $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{MgBr}$ with $\mathrm{C}_{8} \mathrm{H}_{8} \mathrm{O}$ followed by hydrolysis gives compound "A" which reacts instantly with Lucas reagent to give compound $\mathrm{B}, \mathrm{C}_{10} \mathrm{H}_{13} \mathrm{Cl}$. The Compound B is :Correct Option: , 3 Solution: Official Ans. by NTA (3)...
Read More →Given below are two statements :
Question: Given below are two statements : Statement I : The $\mathrm{E}^{\circ}$ value of $\mathrm{Ce}^{4+} / \mathrm{Ce}^{3+}$ is $+1.74 \mathrm{~V}$. Statement II : Ce is more stable in $\mathrm{Ce}^{4+}$ state than $\mathrm{Ce}^{3+}$ state. In the light of the above statements, choose the most appropriate answer from the options given below :Both statement I and statement II are correctStatement I is incorrect but statement II is correctBoth statement I and statement II are incorrectStatemen...
Read More →Solve this following
Question: The above reaction requires which of the following reaction conditions?$573 \mathrm{~K}, \mathrm{Cu}, 300 \mathrm{~atm}$$623 \mathrm{~K}, \mathrm{Cu}, 300 \mathrm{~atm}$$573 \mathrm{~K}, 300 \mathrm{~atm}$$623 \mathrm{~K}, 300 \mathrm{~atm}$Correct Option: , 4 Solution: Temperature $=623 \mathrm{~K}$ Pressure $=300 \mathrm{~atm}$...
Read More →The diazonium salt of which of the following compounds
Question: The diazonium salt of which of the following compounds will form a coloured dye on reaction with $\beta$-Naphthol in $\mathrm{NaOH}$ ?Correct Option: , 3 Solution:...
Read More →The ionic radius of Na+ ions is 1.02
Question: $1.05$ and $0.99$$0.72$ and $0.54$$0.85$ and $0.99$$0.68$ and $0.72$Correct Option: 2, Solution: The ionic radii order is $\mathrm{Na}^{+}\mathrm{Mg}^{2+}\mathrm{Al}^{3+}$...
Read More →Which of the following is correct structure of tyrosine?
Question: Which of the following is correct structure of tyrosine?Correct Option: , 4 Solution: The structure of Tyrosine amino acid is...
Read More →solve this
Question: In the above chemical reaction, intermediate "X" and reagent/condition "A" are :Correct Option: , 3 Solution:...
Read More →Given below are two statements:
Question: Given below are two statements: Statement I : Potassium permanganate on heating at $573 \mathrm{~K}$ forms potassium manganate. Statement II : Both potassium permanganate and potassium manganate are tetrahedral and paramagnetic in nature. In the light of the above statements, choose the most appropriate answer from the options given below:Statement I is true but statement II is falseBoth statement I and statement II are trueStatement I is false but statement II is trueBoth statement I ...
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