1
JEE Main 2021 (Online) 24th February Evening Shift
Numerical
+4
-1
Change Language
The solubility product of PbI2 is 8.0 $$\times$$ 10$$-$$9. The solubility of lead iodide in 0.1 molar solution of lead nitrate is x $$\times$$ 10$$-$$6. mol/L. The value of x is __________. (Rounded off to the nearest integer) [Given $$\sqrt 2 $$ = 1.41]
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2
JEE Main 2021 (Online) 24th February Evening Shift
Numerical
+4
-1
Change Language
1.86 g of aniline completely reacts to form acetanilide. 10% of the product is lost during purification. Amount of acetanilide obtained after purification (in g) is __________ $$\times$$ 10$$-$$2.
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3
JEE Main 2021 (Online) 24th February Evening Shift
Numerical
+4
-1
Out of Syllabus
Change Language
The volume occupied by 4.75 g of acetylene gas at 50$$^\circ$$C and 740 mmHg pressure is __________ L. (Rounded off to the nearest integer)

[Given R = 0.0826 L atm K$$-$$1 mol$$-$$1]
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4
JEE Main 2021 (Online) 24th February Evening Shift
Numerical
+4
-1
Change Language
Assuming ideal behaviour, the magnitude of log K for the following reaction at 25$$^\circ$$C is x $$\times$$ 10$$-$$1. The value of x is ______________. (Integer answer)

$$3HC \equiv C{H_{(g)}} \rightleftharpoons {C_6}{H_{6(l)}}$$

[Given : $${\Delta _f}{G^o}(HC \equiv CH) = - 2.04 \times {10^5}$$ J mol$$-$$1 ; $${\Delta _f}{G^o}({C_6}{H_6}) = - 1.24 \times {10^5}$$ J mol$$-$$1 ; R = 8.314 J K-1 mol$$-$$1]
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