JEE Advanced · 2009 · 12 Apr 2009 · Paper 1 · Some Basic Concepts of Chemistry

The stoichiometric reaction of 516 g of dimethyldichlorosilane with water results in a tetrameric cyclic product X in 75% yield. The weight (in g) of X obtained is ____.

[Use, molar mass …

If the reaction sequence given below is carried out with 15 moles of acetylene, the amount of the product D formed (in g) is ____.

The yields of $\mathbf{A},\mathbf{B},\mathbf{C}$ and $\mathbf{D}$ are given in parentheses.
[Given : Atomic mass of …

To check the principle of multiple proportions, a series of pure binary compounds $\left({\mathrm{P}}_{\mathrm{m}}{\mathrm{Q}}_{\mathrm{n}}\right)$ were analyzed and their composition is tabulated below. The correct option(s) is(are)
| Compound | Weight % of P | Weight % of Q || …

For the following reaction scheme, percentage yields are given along the arrow:

$\mathbf{x}$ g and $\mathbf{y}$ g are mass of $\mathbf{R}$ and $\mathbf{U}$, respectively.
(Use: Molar mass (in ${\mathrm{g}\mathrm{mol}}^{-1}$) of H, C and O as 1, 12 and 16, respectively)

The value of …

Aluminium reacts with sulfuric acid to form aluminium sulfate and hydrogen. What is the volume of hydrogen gas in liters (L) produced at 300 K and 1.0 atm pressure, when 5.4 g of aluminium and 50.0 mL of 5.0 M sulfuric acid are combined for the reaction?
(Use molar mass of alumin …

The mole fraction of urea in an aqueous urea solution containing 900 g of water is 0.05. If the density of the solution is $1.2\mathrm{g}{\mathrm{cm}}^{-3}$, the molarity of urea solution is ____

(Given data : Molar masses of urea and water are $60\mathrm{g}{\mathrm{mol}}^{-1}$ …