1
WB JEE 2022
+1
-0.25

$${C_6}{H_6}(liq) + {{15} \over 2}{O_2}(g) \to 6C{O_2}(g) + 3{H_2}O(liq)$$

Benzene burns in oxygen according to the above equation. What is the volume of oxygen (at STP) needed for complete combustion of 39 gram of liquid benzene?

A
11.2 litre
B
22.4 litre
C
84 litre
D
168 litre
2
WB JEE 2022
+1
-0.25

A metal (M) forms two oxides. The ratio M:O (by weight) in the two oxides are 25:4 and 25:6. The minimum value of atomic mass of M is

A
50
B
100
C
150
D
200
3
WB JEE 2022
+1
-0.25

1 mL of water has 25 drops. Let N0 be the Avogadro number. What is the number of molecules present in 1 drop of water ? (Density of water = 1 g/mL)

A
$${{0.02} \over 9}{N_0}$$
B
$${{18} \over {25}}{N_0}$$
C
$${{25} \over {18}}{N_0}$$
D
$${{0.04} \over {25}}{N_0}$$
4
WB JEE 2021
+2
-0.5
The mole fraction of a solute in a binary solution is 0.1 at 298 K, molarity of this solution is same as its molality. Density of this solution at 298 K is 2.0 g cm$$-$$3. The ratio of molecular weights of the solute and the solvent (Msolute / Msolvent) is
A
9
B
$${1 \over {9}}$$
C
4.5
D
$${1 \over {4.5}}$$
WB JEE Subjects
Physics
Mechanics
Electricity
Optics
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
Coordinate Geometry
Calculus
EXAM MAP
Joint Entrance Examination