JEE Main Test 1...

For a crystal, the angle of diffraction (2 θ) is 90° and the second order line has a d value of 2.28Å . The wavelength (in Å ) of X-rays used for Bragg's diffraction is

Na₂S + Na₂[Fe(CN)₅NO] → purple colour.

It is due to

The ammonia evolved from the treatment of 0.30 g of an organic compound for the estimation of nitrogen was passed in 100 mL of 0.1 M sulphuric acid. The excess of acid required 20 mL of 0.5 M sodium hydroxide solution for complete neutralisation. The organic compound is

Quantitative measurement of nitrogen in an organic compound is done by the method

For a dilute solution containing 2.5 g of a non-volatile non-electrolyte solute in 100 g of water, the elevation in boiling point at 1 atm pressure is 2° C . Assuming concentration of solute is much lower than the concentration of solvent, the vapour pressure (mm of Hg) of the solution is (take K_b = 0.76 K kg mol^-1)

The rusting of iron takes place as follows

2H⁺ + 2e^- + 1/2 O₂ → H₂O (l); E^o = +1.23 V

Fe²⁺ + 2e^- → Fe(s); E^o = - 0.44 V

Calculate ∆G^o for the net process.

Which of the following statements is incorrect regarding physisorption?

The following homogeneous gaseous reactions were experimentally found to be second order overall.

Which of the following is an example for heterogeneous catalysis reaction ?

Extra pure N₂ can be obtained by heating