1
JEE Main 2022 (Online) 28th July Morning Shift
+4
-1

The metal salts formed during softening of hardwater using Clark's method are :

A
$$\mathrm{Ca}(\mathrm{OH})_{2}$$ and $$\mathrm{Mg}(\mathrm{OH})_{2}$$
B
$$\mathrm{CaCO}_{3}$$ and $$\mathrm{Mg}(\mathrm{OH})_{2}$$
C
$$\mathrm{Ca}(\mathrm{OH})_{2}$$ and $$\mathrm{MgCO}_{3}$$
D
$$\mathrm{CaCO}_{3}$$ and $$\mathrm{MgCO}_{3}$$
2
JEE Main 2022 (Online) 27th July Morning Shift
+4
-1

Given below are two statements.

Statement I: Hydrogen peroxide can act as an oxidizing agent in both acidic and basic conditions.

Statement II: Density of hydrogen peroxide at $$298 \mathrm{~K}$$ is lower than that of $$\mathrm{D}_{2} \mathrm{O}$$.

In the light of the above statements, choose the correct answer from the options given below.

A
Both Statement I and Statement II are true.
B
Both Statement I and Statement II are false.
C
Statement I is true but Statement II is false.
D
Statement I is false but Statement II is true.
3
JEE Main 2022 (Online) 26th July Evening Shift
+4
-1
The products obtained from a reaction of hydrogen peroxide and acidified potassium permanganate are
A
$$\mathrm{Mn}^{4+}, \mathrm{H}_{2} \mathrm{O}$$ only
B
$$\mathrm{Mn}^{2+}, \mathrm{H}_{2} \mathrm{O}$$ only
C
$$\mathrm{Mn}^{4+}, \mathrm{H}_{2} \mathrm{O}, \mathrm{O}_{2}$$ only
D
$$\mathrm{Mn}^{2+}, \mathrm{H}_{2} \mathrm{O}, \mathrm{O}_{2}$$ only
4
JEE Main 2022 (Online) 26th July Morning Shift
+4
-1

Which of the following can be used to prevent the decomposition of $$\mathrm{H}_{2} \mathrm{O}_{2}$$ ?

A
Urea
B
Formaldehyde
C
Formic acid
D
Ethanol
JEE Main 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