NTA JEE Mains 28th Jan 2025 Shift 1

Given below are two statements: Statement I : D-glucose pentaacetate reacts with 2, 4-dinitrophenylhydrazine Statement II : Starch, on heating with concentrated sulfuric acid at $$100^{\circ}$$ and 2-3 atmosphere pressure produces glucose. In the light of the above statements, choose the correct answer from the options given below

Both acetaldehyde and acetone (individually) undergo which of the following reactions? A. Iodoform Reaction B. Cannizaro Reaction C. Aldol Condensation D. Tollen's Test E. Clemmensen Reduction Choose the correct answer from the options given below:

Which of the following oxidation reactions are carried out by both $$K_{2}Cr_{2}O_{7}$$ and $$KMnO_{4}$$ in acidic medium? $$A.\Gamma^{-}\rightarrow I_{2}B.S^{2-}\rightarrow S C.Fe^{2+}\rightarrow Fe^{3+}D.\Gamma^{-}\rightarrow IO_{3}^{-}E.S_{2}O_{3}^{2-}\rightarrow SO_{4}^{2-}$$ Choose the correct answer from the options given below:

A molecule (" P ") on treatment with acid undergoes rearrangement and gives ("Q"). ("Q") on ozonolysis followed by reflux under alkaline condition gives (" R "). The structure of (" R ") is given below.

The structure of("P")is

The correct order of stability of following carbocations is :

The products A and B in the following reactions, respectively are

In a multielectron atom, which of the following orbitals described by three quantum numbers will have same energy in absence of electric and magnetic fields? $$A. n = 1, l = 0, m_{1}=0 B.n = 2,l = 0, m_{1}=0 C.n = 2,l = 1, m_{1}=1 D.n = 3,l = 2, m_{1} = 1 E.n = 3, l = 2, m_{1} = 0$$ Choose the correct answer from the options given below:

A weak acid HA has degree of dissociation x . Which option gives the correct expression of $$(pH pK_{a})$$ ?

The molecules having square pyramidal geometry are

Consider the following elements In, Tl, Al, Pb, Sn and Ge . The most stable oxidation states of elements with highest and lowest first ionisation enthalpies, respectively, are