1
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The pair in which both the species have the same magnetic moment (spin only) is :
A
[Cr(H2O)6]2+ and [CoCl4]2–
B
[Co(OH)4]2– and [Fe(NH3)6]2+
C
[Mn(H2O)6]2+ and [Cr(H2O)]2+
D
[Cr(H2O)6]2+ and [Fe(H2O)6]2+
2
JEE Main 2020 (Online) 4th September Morning Slot
Numerical
+4
-0
Change Language
A 20.0 mL solution containing 0.2 g impure H2O2 reacts completely with 0.316 g of KMnO4 in acid solution. The purity of H2O2 (in %) is _____________
(mol. wt. of H2O2 = 34; mol. wt. of KMnO4 = 158)
Your input ____
3
JEE Main 2020 (Online) 4th September Morning Slot
Numerical
+4
-0
Change Language
The mass of ammonia in grams produced when 2.8 kg of dinitrogen quantitatively reacts with 1 kg of dihydrogen is _______.
Your input ____
4
JEE Main 2020 (Online) 4th September Morning Slot
Numerical
+4
-0
Change Language
At 300 K, the vapour pressure of a solution containing 1 mole of n-hexane and 3 moles of n-heptane is 550 mm of Hg. At the same temperature, if one more mole of n-heptane is added to this solution, the vapour pressure of the solution increases by 10 mm of Hg. What is the vapour pressure in mm Hg of n-heptane in its pure state ______?
Your input ____
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