1
WB JEE 2025
MCQ (Single Correct Answer)
+1
-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

A
$\mathrm{Al}^{3+}<\mathrm{Ba}^{2+}<\mathrm{Na}^{+}$
B
$\mathrm{Na}^{+}<\mathrm{Ba}^{2+}<\mathrm{Al}^{3+}$
C
$\mathrm{Ba}^{2+}<\mathrm{Na}^{+}<\mathrm{Al}^{3+}$
D
$\mathrm{Al}^{3+}<\mathrm{Na}^{+}<\mathrm{Ba}^{2+}$
2
WB JEE 2024
MCQ (Single Correct Answer)
+1
-0.25

Identify the incorrect statement among the following :

A
Viscosity of liquid always decreases with increase in temperature.
B
Surface tension of liquid always decreases with increase in temperature.
C
Viscosity of liquid always increases in presence of impurity.
D
Surface tension of liquid always increases in presence of impurity.
3
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
Among the following, the ion which will be more effective for flocculation of Fe(OH)3 solution is :
A
$$PO_4^{3 - }$$
B
$$SO_4^{2 - }$$
C
$$SO_3^{2 - }$$
D
$$NO_3^{ - }$$
4
WB JEE 2016
MCQ (Single Correct Answer)
+1
-0.25
Point out the false statement.
A
Colloidal sols are homogeneous
B
Colloids carry +ve or $$-$$ve charges
C
Colloids show Tyndall effect
D
The size range of colloidal particles is 10-1000 $$\mathop A\limits^o $$
Questions Asked from MCQ (Single Correct Answer)
WB JEE Subjects