1
JEE Main 2021 (Online) 22th July Evening Shift
Numerical
+4
-1
Change Language
Assume a cell with the following reaction

$$C{u_{(s)}} + 2A{g^ + }(1 \times {10^{ - 3}}M) \to C{u^{2 + }}(0.250M) + 2A{g_{(s)}}$$

$$E_{cell}^\Theta = 2.97$$ V

Ecell for the above reaction is ______________ V. (Nearest integer)

[Given : log 2.5 = 0.3979, T = 298 K]
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2
JEE Main 2021 (Online) 22th July Evening Shift
Numerical
+4
-1
Change Language
Value of KP for the equilibrium reaction

N2O4(g) $$\rightleftharpoons$$ 2NO2(g) at 288 K is 47.9. The KC for this reaction at same temperature is ____________. (Nearest integer)

(R = 0.083 L bar K$$-$$1 mol$$-$$1)
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3
JEE Main 2021 (Online) 22th July Evening Shift
Numerical
+4
-1
Change Language
If the standard molar enthalpy change for combustion of graphite powder is $$-$$2.48 $$\times$$ 102 kJ mol$$-$$1, the amount of heat generated on combustion of 1 g of graphite powder is ___________ kJ. (Nearest integer)
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4
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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