WB JEE 2025 | WB JEE Year Wise Previous Years Questions

WB JEE 2025

MCQ (Single Correct Answer)

-0.25

The coagulating power of electrolytes having ions $\mathrm{Na}^{+}, \mathrm{Al}^{3+}$ and $\mathrm{Ba}^{2+}$ for $\mathrm{As}_2 \mathrm{S}_3$ sol increases in the order

$\mathrm{Al}^{3+}<\mathrm{Ba}^{2+}<\mathrm{Na}^{+}$

$\mathrm{Na}^{+}<\mathrm{Ba}^{2+}<\mathrm{Al}^{3+}$

$\mathrm{Ba}^{2+}<\mathrm{Na}^{+}<\mathrm{Al}^{3+}$

$\mathrm{Al}^{3+}<\mathrm{Na}^{+}<\mathrm{Ba}^{2+}$

WB JEE 2025

MCQ (Single Correct Answer)

-0.25

If three elements $A, B, C$ crystalise in a cubic solid lattice with $B$ atoms at the cubic centres, $C$ aton at the centre of edges and A atoms at the corners, then formula of the compound is

$\mathrm{AB}_3 \mathrm{C}$

$\mathrm{A}_3 \mathrm{BC}$

$\mathrm{ABC}_3$

$\mathrm{ABC}$

WB JEE 2025

MCQ (Single Correct Answer)

-0.25

Which of the following oxides is paramagnetic?

$\mathrm{SO}_2$

$\mathrm{NO}_2$

$\mathrm{SiO}_2$

$\mathrm{CO}_{\mathbf{2}}$