NTA JEE Mains 28th Jan 2025 Shift 1

For a given reaction $$R\rightarrow P,t_{1/2}$$ is related to $$[A]_{\circ}$$ as given in table. Given: $$\log 2=0.30$$ Which of the following is true? A. The order of the reaction is 1/2.B.If $$[A]_{\circ}$$ is 1 M, then $$t_{1/2}$$ is $$200\sqrt{10}min$$ C.The order of the reaction changes to 1 if the concentration of reactant changes from 0.100 M to 0.500 M . D. $$t_{1/2}$$ is 800 min for $$[A]_{\circ}=1.6M$$ Choose the correct answer from the options given below: Options

Match the LIST-I with LIST-II

Choose the correct answer from the options given below:

Given below are two statements: Statement I: In the oxalic acid vs $$KMnO_{4}$$ (in the presence of dil $$H_{2}SO_{4}$$) titration the solution needs to be heated initially to $$60^{\circ}C$$, but no heating is required in Ferrous ammonium sulphate (FAS) vs $$KMnO_{4}$$ (in the presence of dil $$H_{2}SO_{4}$$) Statement II: In oxalic acid vs $$KMnO_{4}$$ titration, the initial formation of $$Mnso_{4}$$ takes place at high temperature, which then acts as catalyst for further reaction. In the case of FAS vs $$KMnO_{4}$$, heating oxidizes $$Fe^{2+}$$ and $$Fe^{3+}$$ by oxygen of air and error may be introduced in the experiment. In the light of the above statements, choose the correct answer from the options given below

The metal ion whose electronic configuration is not affected by the nature of the ligand and which gives a violet colour in non-luminous flame under hot condition in borax bead test is

The compounds that produce $$CO_{2}$$ with aqueous $$NaHCO_{3}$$ solution are:
A. 

B. 

C. 

D. 

E. 

Choose the correct answer from the options given below:

What is the freezing point depression constant of a solvent, 50g of which contain 1 g non volatile solute (molar mass 256 g $$mol^{-1}$$) and the decrease in freezing point is 0.40 K ?

Given below are two statements:

involving lone pair of electrons on nitrogen. In the light of the above statements, choose the most appropriate answer from the options given below

Ice and water are placed in a closed container at a pressure of 1 atm and temperature 273.15 K . If pressure of the system is increased 2 times, keeping temperature constant, then identify correct observation from following

The incorrect decreasing order of atomic radii is

Consider $$'n'$$ is the number of lone pair of electrons present in the equatorial position of the most stable structure of $$ClF_{3}$$. The ions from the following with $$'n'$$ number of unpaired electrons are $$A. V^{3+} B.Ti^{3+} C.Cu^{2+} D.Ni^{2+} E.Ti^{2+}$$ Choose the correct answer from the options given below :