1
JEE Main 2021 (Online) 18th March Morning Shift
Numerical
+4
-1
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Complete combustion of 3g of ethane gives x $$\times$$ 1022 molecules of water. The value of x is __________. (Round off to the Nearest Integer). [Use : NA = 6.023 $$\times$$ 1023; Atomic masses in u : C : 12.0; O : 16.0; H : 1.0]
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2
JEE Main 2021 (Online) 17th March Evening Shift
Numerical
+4
-1
Change Language
JEE Main 2021 (Online) 17th March Evening Shift Chemistry - Some Basic Concepts of Chemistry Question 107 English
Consider the above reaction. The percentage yield of amide product is __________. (Round off to the Nearest Integer).

(Given : Atomic mass : C : 12.0 u, H : 1.0 u, N : 14.0 u, O : 16.0 u, Cl : 35.5 u)
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3
JEE Main 2021 (Online) 17th March Morning Shift
Numerical
+4
-1
Change Language
15 mL of aqueous solution of Fe2+ in acidic medium completely reacted with 20 mL of 0.03 M aqueous Cr2O$$_7^{2 - }$$. The molarity of the Fe2+ solution is __________ $$\times$$ 10-2 M. (Round off to the Nearest Integer).
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4
JEE Main 2021 (Online) 17th March Morning Shift
Numerical
+4
-1
Change Language
The mole fraction of a solute in a 100 molal aqueous solution is ___________ $$\times$$ 10$$-$$2. (Round off to the Nearest Integer).

[Given : Atomic masses : H : 1.0 u, O : 16.0 u ]
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