1
JEE Main 2021 (Online) 22th July Evening Shift
Numerical
+4
-1
Out of Syllabus
Change Language
A copper complex crystallising in a CCP lattice with a cell edge of 0.4518 nm has been revealed by employing X-ray diffraction studies. The density of a copper complex is found to be 7.62 g cm$$-$$3. The molar mass of copper complex is ____________ g mol$$-$$1. (Nearest integer)

[Given : NA = 6.022 $$\times$$ 1023 mol$$-$$1]
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2
JEE Main 2021 (Online) 22th July Evening Shift
Numerical
+4
-1
Change Language
Number of electrons that Vanadium (Z = 23) has in p-orbitals is equal to _____________
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3
JEE Main 2021 (Online) 22th July Evening Shift
Numerical
+4
-1
Change Language
$${N_2}{O_{5(g)}} \to 2N{O_{2(g)}} + {1 \over 2}{O_{2(g)}}$$

In the above first order reaction the initial concentration of N2O5 is 2.40 $$\times$$ 10$$-$$2 mol L$$-$$1 at 318 K. The concentration of N2O5 after 1 hour was 1.60 $$\times$$ 10$$-$$2 mol L$$-$$1. The rate constant of the reaction at 318 K is ______________ $$\times$$ 10$$-$$3 min$$-$$1. (Nearest integer)

[Given : log 3 = 0.477, log 5 = 0.699]
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4
JEE Main 2021 (Online) 22th July Evening Shift
Numerical
+4
-1
Change Language
If the concentration of glucose (C6H12O6) in blood is 0.72 g L$$-$$1, the molarity of glucose in blood is ____________ $$\times$$ 10$$-$$3 M. (Nearest integer)

[Given : Atomic mass of C = 12, H = 1, O = 16 u]
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