1
JEE Main 2022 (Online) 27th July Evening Shift
Numerical
+4
-1

In the above reaction, $$5 \mathrm{~g}$$ of toluene is converted into benzaldehyde with $$92 \%$$ yield. The amount of benzaldehyde produced is ______________ $$\times 10^{-2} \mathrm{~g}$$. (Nearest integer)

2
JEE Main 2022 (Online) 25th July Evening Shift
Numerical
+4
-1

The separation of two coloured substances was done by paper chromatography. The distances travelled by solvent front, substance A and substance B from the base line are 3.25 cm, 2.08 cm and 1.05 cm, respectively. The ratio of Rf values of A to B is _____________.

3
JEE Main 2022 (Online) 25th July Morning Shift
Numerical
+4
-1

While estimating the nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from $$0.25 \mathrm{~g}$$ of the compound neutralized $$2.5 \mathrm{~mL}$$ of $$2 \,\mathrm{M} \,\mathrm{H}_{2} \mathrm{SO}_{4}$$. The percentage of nitrogen present in organic compound is ______________.

4
JEE Main 2022 (Online) 30th June Morning Shift
Numerical
+4
-1

An organic compound with 51.6% sulfur is heated in a Carius tube. The amount of this compound which will form 0.752 g of barium sulphate is ___________ $$\times$$ 10$$-$$1 g.

(Given molar mass of barium sulphate 233 g mol$$-$$1) (Nearest integer).

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