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The heating of \( \mathrm{NH_4NO_2} \) at \( 60\text{–}70^\circ\mathrm{C} \) and \( \mathrm{NH_4NO_3} \) at \( 200\text{–}250^\circ\mathrm{C} \) is associated with the formation of nitrogen containing compounds \( X \) and \( Y \), respectively. \( X \) and \( Y \), respectively, are:

18.

The correct order of the wavelength maxima of the absorption band in the ultraviolet-visible region for the given complexes is:

19.

One of the products formed from the reaction of permanganate ion with iodide ion in neutral aqueous medium is:

20.

Consider the depicted hydrogen \( (H) \) in the hydrocarbons given below. The most acidic hydrogen \( (H) \) is:

21.

Regarding the molecular orbital \( (\mathrm{MO}) \) energy levels for homonuclear diatomic molecules, the INCORRECT statement(s) is(are):

22.

The pair(s) of diamagnetic ions is(are):

23.

For the reaction sequence given below, the correct statement(s) is(are):

(In the options, \( X \) is any atom other than carbon and hydrogen, and it is different in \( P, Q \) and \( R \))

24.

In an electrochemical cell, dichromate ions in aqueous acidic medium are reduced to \( \mathrm{Cr}^{3+} \). The current (in amperes) that flows through the cell for \( 48.25 \) minutes to produce \( 1 \) mole of \( \mathrm{Cr}^{3+} \) is ________.
Use: \( 1 \) Faraday \( = 96500 \) \( \mathrm{C\ mol^{-1}} \)

25.

At \( 25\,^{\circ}\mathrm{C} \), the concentration of \( \mathrm{H}^{+} \) ions in \( 1.00 \times 10^{-3} \) \( \mathrm{M} \) aqueous solution of a weak monobasic acid having acid dissociation constant \( (K_a) \) of \( 4.00 \times 10^{-11} \) is \( X \times 10^{-7} \) \( \mathrm{M} \). The value of \( X \) is __________.
Use: Ionic product of water \( K_w = 1.00 \times 10^{-14} \) at \( 25\,^{\circ}\mathrm{C} \)

26.

Molar volume \( (V_m) \) of a van der Waals gas can be calculated by expressing the van der Waals equation as a cubic equation with \( V_m \) as the variable. The ratio (in \( \mathrm{mol\ dm^{-3}} \)) of the coefficient of \( V_m^{2} \) to the coefficient of \( V_m \) for a gas having van der Waals constants \( a = 6.0 \) \( \mathrm{dm^{6}\ atm\ mol^{-2}} \) and \( b = 0.060 \) \( \mathrm{dm^{3}\ mol^{-1}} \) at \( 300 \) \( \mathrm{K} \) and \( 300 \) \( \mathrm{atm} \) is __________.
Use: Universal gas constant \( (R) = 0.082 \) \( \mathrm{dm^{3}\ atm\ mol^{-1}\ K^{-1}} \)

27.

Considering ideal gas behavior, the expansion work done (in \( \mathrm{kJ} \)) when \( 144 \) \( \mathrm{g} \) of water is electrolyzed completely under constant pressure at \( 300 \) \( \mathrm{K} \) is _______.
Use: Universal gas constant \( (R) = 8.3 \) \( \mathrm{J\ K^{-1}\ mol^{-1}} \); Atomic mass (in amu): \( \mathrm{H} = 1 \), \( \mathrm{O} = 16 \)

28.

The monomer \( (X) \) involved in the synthesis of Nylon \( 6,6 \) gives positive carbylamine test. If \( 10 \) moles of \( X \) are analyzed using Dumas method, the amount (in grams) of nitrogen gas evolved is __________.
Use: Atomic mass of \( \mathrm{N} \) (in amu) \( = 14 \)

29.

The reaction sequence given below is carried out with \( 16 \) moles of \( X \). The yield of the major product in each step is given below the product in parentheses. The amount (in grams) of \( S \) produced is ________.

Use: Atomic mass (in amu): \( \mathrm{H=1, \ C=12, \ O=16, \ Br=80} \).

30.

The correct match of the group reagents in List-I for precipitating the metal ion given in List-II from solutions, is:

List-I	List-II
P. Passing \( \mathrm{H_2S} \) in the presence of \( \mathrm{NH_4OH} \)	1. \( \mathrm{Cu^{2+}} \)
Q. \( \mathrm{(NH_4)_2CO_3} \) in the presence of \( \mathrm{NH_4OH} \)	2. \( \mathrm{Al^{3+}} \)
R. \( \mathrm{NH_4OH} \) in the presence of \( \mathrm{NH_4Cl} \)	3. \( \mathrm{Mn^{2+}} \)
S. Passing \( \mathrm{H_2S} \) in the presence of dilute \( \mathrm{HCl} \)	4. \( \mathrm{Ba^{2+}} \)
	5. \( \mathrm{Mg^{2+}} \)

31.

The major products obtained from the reactions in List-II are the reactants for the named reactions mentioned in List-I. Match each entry in List-I with the appropriate entry in List-II choose the correct option.

32.

Match the compounds in List-I with the appropriate observations in List-II and choose the correct option.

JEE Advance 2025 Paper 1

Physics Chemistry Mathematics

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