NTA JEE Mains 29th Jan 2025 Shift 1

The product (P) formed in the following reaction is :

If $$a_{\circ}$$ is denoted as the Bohr radius of hydrogen atom, then what is the de-Broglie wavelength $$(\lambda)$$ of the electron present in the second orbit of hydrogen atom? [n : any integer]

Match List - I with List - II.

Choose the correct answer from the options given below :

The reaction $$A_{2}+B_{2}\rightarrow 2AB$$ follows the mechanism
$$A_{2}k_{1}A+A(fast)\\ \text{     }{_{k_{-1}}}\\ \\A+B_{2}\xrightarrow{k_{2}}AB+B(slow)\\A+B \rightarrow AB(fast)$$
The overall order of the reaction is :

1.24 g of $$AX_{2}$$ (molar mass 124 g $$mol^{-1}$$) is dissolved in 1 kg of water to form a solution with boiling point of $$100.0156^{\circ}C$$, while $$25.4g^{\circ}$$ of $$AY_{2}$$ (molar mass 250 g $$mol^{-1}$$) in 2 kg of water constitutes a solution with a boiling point of $$100.0260^{\circ}C.K_{b}(H_{2}O)=0.52 K$$ kg $$mol^{-1}$$ Which of the following is correct ?

Choose the correct statements. (A) Weight of a substance is the amount of matter present in it. (B) Mass is the force exerted by gravity on an object. (C) Volume is the amount of space occupied by a substance. (D) Temperatures below $$O^{\circ}C$$ are possible in Celsius scale, but in Kelvin scale negative temperature is not possible. (E) Precision refers to the closeness of various measurements for the same quantity. Choose the correct answer from the options given below :

The correct option with order of melting points of the pairs (Mn, Fe), (Tc, Ru) and (Re, Os) is :

For a $$Mg|Mg^{2+}(aq)||Ag^{+}(aq)|Ag$$ the correct Nernst Equation is :

In The following substitution reaction :

product 'P'formed is :

The correct increasing order of stability of the complexes based on $$\Delta_{\circ}$$ value is: I.$$[Mn(CN)_{6}]^{3}$$ II.$$[Co(CN)_{6}]^{4-}$$ III.$$[Fe(CN)_{6}]^{4-}$$ IV.$$[Fe(CN)_{6}]^{3-}$$