Chemistry Test ...

The reaction of cyanamide, \(\mathrm{NH}_{2} \mathrm{CN}(\mathrm{s})\) with dioxygen was carried out in a bomb calorimeter and \(\Delta \mathrm{U}\) was found to be \(-742.7 \mathrm{KJ} \mathrm{mol}^{-1}\) at \(298 \mathrm{~K}\). Calculate the enthalpy change for the reaction at \(298 \mathrm{~K}\).

\(\mathrm{N H}_{4} \mathrm{CN}_{(\mathrm{g})}+\frac{3}{2} \mathrm{O}_{2(\mathrm{~g})} \rightarrow \mathrm{N}_{2(\mathrm{~g})}+\mathrm{CO}_{2(\mathrm{~g})}+\mathrm{H}_{2} \mathrm{O}_{(\mathrm{l})}\)

Ethylidene chloride is a/an ___________.

Match List-I with List-II

Choose the correct answer form the options given below.

Which of the following is not a heteroatom?

In a hexagonal closed packing lattice, coordination number of an atom in a unit cell is:

Calculate (a) wavenumber and (b) frequency of yellow radiation having wavelength \(5800 Å\).

In the complex \(K _{2} Fe \left[ Fe ( CN )_{6}\right]\):

Which of the following compounds give(s) positive test with Tollens' reagent?

A. Carboxylic acid

B. Alcohol

C. Alpha hydroxy ketones

D. Aldehydes

A rain in 50% completed om shown and 75% in 4 hours. Find the order of reaction:

Bonds that do not exist in tertiary structure of proteins: