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Chemistry · 2021 · 24 Feb · Shift 1

22 questions from this JEE Main paper

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2021 · 24 Feb · Shift 1
Chemistry

Chemistry · 2021 · 24 Feb · Shift 1

22 questions from this JEE Main paper

Electrochemistry1 questions Aldehydes Ketones and Carboxylic Acids1 questions Chemical Bonding and Molecular Structure1 questions Periodic Table and Periodicity2 questions Biomolecules1 questions Alcohols Phenols and Ethers2 questions D and F Block Elements1 questions Compounds Containing Nitrogen2 questions Haloalkanes and Haloarenes2 questions Hydrocarbons1 questions Chemical Equilibrium3 questions Structure of Atom1 questions Solutions1 questions Some Basic Concepts of Chemistry1 questions P Block Elements1 questions Chemical Kinetics and Nuclear Chemistry1 questions

Q1.The electrode potential of $M^{2 +}$ /M of 3d-series elements shows positive value for :
Chemistry · Electrochemistry · MCQ
Q2.Which of the following reagent is used for the following reaction ? $CH_{3} CH_{2} CH_{3} ⟶ ? CH_{3} CH_{2} CHO$
Chemistry · Aldehydes Ketones and Carboxylic Acids · MCQ
Q3.Which of the following are isostructural pairs ? A. $S O_{4}^{2 -}$ and $C r O_{4}^{2 -}$ B. $S i C l_{4}$ , and $T i C l_{4}$ C. $N H_{3}$ and $N O_{3}^{-}$ D. $B C l_{3}$ and $B r C l_{3}$
Chemistry · Chemical Bonding and Molecular Structure · MCQ
Q4.Consider the elements Mg, Al, S, P and Si, the correct increasing order of their first ionization enthalpy is :
Chemistry · Periodic Table and Periodicity · MCQ
Q5.Out of the following, which type of interaction is reponsible for the stabilisation of $α$ -helix structure of proteins ?
Chemistry · Biomolecules · MCQ
Q6.Which of the following compound gives pink colour on reaction with phthalic anhydride in conc. $H_{2} S O_{4}$ followed by treatment with $N a O H$ ?
Chemistry · Alcohols Phenols and Ethers · MCQ
Q7.Given below are two statements : Statement I : Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame. Statement II : Cuprous metaborate is obtained by heating boric anhydride and copper sulphate in a…
Chemistry · D and F Block Elements · MCQ
Q8.In the following reaction the reason why meta-nitro product also formed is : Includes diagram
Chemistry · Compounds Containing Nitrogen · MCQ
Q9.What is the major product formed by HI on reaction with Includes diagram
Chemistry · Haloalkanes and Haloarenes · MCQ
Q10.'A' and 'B' in the following reactions are : Includes diagram
Chemistry · Compounds Containing Nitrogen · MCQ
Q11.Identify products A and B. Includes diagram
Chemistry · Hydrocarbons · MCQ
Q12.What is the final product (major) 'A' in the given reaction ? Includes diagram
Chemistry · Alcohols Phenols and Ethers · MCQ
Q13.The product formed in the first step of the reaction of with excess $Mg/E t_{2} O$ ( $Et = C_{2} H_{5}$ ) is Includes diagram
Chemistry · Haloalkanes and Haloarenes · MCQ
Q14.Number of amphoteric compounds among the following is . (A) $B e O$ (B) $B a O$ (C) $B e (O H)_{2}$ (D) $S r (O H)_{2}$
Chemistry · Periodic Table and Periodicity · Numerical
Q15.The stepwise formation of $[C u (N H_{3})_{4}]^{2 +}$ is given below: The value of stability constants K1, K2, K3 and K4 are 104, 1.58 x 103, 5 x 102 and 102 respectively. The overall equilibrium constants… Includes diagram
Chemistry · Chemical Equilibrium · Numerical
Q16.A proton and a $L i^{3 +}$ nucleus are accelerated by the same potential. If $λ_{L i}$ and $λ_{p}$ denote the de Broglie wavelengths of $L i^{3 +}$ and proton respectively, then the value of ${{{\lambda _{Li}}} \over {{\lambda…
Chemistry · Structure of Atom · Numerical
Q17.At 1990 K and 1 atm pressure, there are equal number of $C l_{2}$ , molecules and $C l$ atoms in the reaction mixture. The value of Kp for the reaction $C l_{2}$ (g) $⇌$ 2 $C l$ (g) under the above conditions is x $\times$ 10-1.…
Chemistry · Chemical Equilibrium · Numerical
Q18.When 9.45 g of $C I C H_{2} C O O H$ is added to 500 mL of water, its freezing point drops by 0.5°C. The dissociation constant of $C I C H_{2} C O O H$ is x $\times$ 10-3. The value of x is . (Rounded off to the nearest integer)…
Chemistry · Solutions · Numerical
Q19.4.5 g of compound A (MW = 90) was used to make 250 mL of its aqueous solution. The molarity of the solution in M is x $\times$ 10-1. The value of x is . (Rounded off to the nearest integer)
Chemistry · Some Basic Concepts of Chemistry · Numerical
Q20.The reaction of sulphur in alkaline medium is given below: The values of 'a' is . (Integer answer) Includes diagram
Chemistry · P Block Elements · Numerical
Q21.For the reaction A(g) $\to$ B(g) the value of the equilibrium constant at 300 K and 1 atm is equal to 100.0. The value of $Δ$ rG for the reaction at 300 K and 1 atm in J mol-1 is – xR, where x is . (Rounded…
Chemistry · Chemical Equilibrium · Numerical
Q22.Gaseous cyclobutene isomerises to butadiene in a first order process which has a 'k' value of 3.3 $\times$ 10-4 s-1 at 153°C. The time in minutes it takes for the isomerization to proceed 40% to completion at this temperature is …
Chemistry · Chemical Kinetics and Nuclear Chemistry · Numerical