NTA JEE Mains 5th April Shift 1 2026

How many grams of residue is obtained by heating 2.76 g of silver carbonate? (Given: Molar mass of C, O and Ag are 12, 16 and 108 g mol$$^{-1}$$ respectively)

Arrange the following atomic orbitals of multi electron atoms in order of increasing energy.
A. $$n = 3, l = 2, m = +1$$
B. $$n = 4, l = 0, m = 0$$
C. $$n = 6, l = 1, m = 0$$
D. $$n = 5, l = 1, m = +1$$
E. $$n = 2, l = 1, m = +1$$
Choose the correct answer from the options given below:

Identify the correct statements from the following:
A. Heisenberg uncertainty principle is applicable to electrons.
B. The size of $$2p_x$$ orbital is less than the size of $$3p_x$$ orbital.
C. The energy of 2s orbital of H atom is equal to the energy of 2s orbital of Li.
D. The electronic configuration of Cr is [Ar] $$3d^5 4s^1$$
Choose the correct answer from the options given below:

What is the mole fraction of water in 10% by weight (w/w) of aqueous urea solution? [Given: Molar mass of H, O, C and N are 1, 16, 12 and 14 g mol$$^{-1}$$ respectively.]

$$M_3A_2$$ is a sparingly soluble salt of molar mass $$y$$ g mol$$^{-1}$$ and solubility $$x$$ g L$$^{-1}$$. The ratio of the molar concentration of the anion ($$A^{3-}$$) to the solubility product of the salt is

Arrange the following resultant mixtures in increasing order of their pH values
A. 10 mL 0.2 M Ca(OH)$$_2$$ + 25 mL 0.1 M HCl
B. 10 mL 0.01 M H$$_2$$SO$$_4$$ + 10 mL 0.01 M Ca(OH)$$_2$$
C. 10 mL 0.1 M H$$_2$$SO$$_4$$ + 10 mL 0.1 M KOH
Choose the correct answer from the options given below:

First order gas phase reaction
$$A \to B + C$$
$$p_i$$ = initial pressure of gas A, $$p_t$$ = total pressure of the reaction mixture at time $$t$$
Expression of rate constant (k) is

Given below are two statements:
Statement I: The correct order of electronegativity of fluorine, oxygen and nitrogen is $$F > O > N$$.
Statement II: The oxidation state of oxygen in $$OF_2$$ is +2 and in $$Na_2O$$ is $$-2$$.
In the light of the above statements, choose the correct answer from the options given below

Correct statements from the following are:
A. Nitrogen in oxidation states from +1 to +4 disproportionates in acid medium.
B. Nitrogen has the ability to form d$$\pi$$ - p$$\pi$$ multiple bonds with itself and other elements with small size and high electronegativity.
C. N-N single bond is stronger than P-P single bond.
D. Nitrogen has highest density in its group due to small size.
E. The maximum covalency of nitrogen is four since it has only four valence orbitals for bonding.
Choose the correct answer from the options given below:

Which of the following is NOT a physical or chemical characteristics of interstitial compounds?