Chemistry Test ...

A reaction mixture containing H₂, N₂ and NH₃ has partial pressures 2 atm,1 atm and 3 atm respectively at 725 K. If the value of Kp for the reaction, N₂(g) + 3H₂(g) ⇌ 2NH₃(g) is 4.28 × 10⁻⁵ atm⁻² at 725 K, in which direction the net reaction will go ?

If SO₂ content in the atmosphere is 0.12ppm by volume, pH of rain water is (assume 100% ionisation of acid rain as monobasic acid)

Which of the following statements are correct ?

a. I is the major product of the reaction

b. II is the major product of the reaction

c. Formation of I is in accordance with Saytzeff's rule

d. II is more stable because it is more substituted

Which of the following statements are correct?

1. Electron density in xy plane in 3d_x²-y² orbital is zero.

2. Electron density in xy plane in 3d_z² orbital is zero.

3. 2s orbital has only one spherical node in it.

4. For 2p_x orbital yz is the nodal plane.

Assertion (A): Mg²⁺ and Al³⁺ are isoelectronic but the magnitude of ionic radius of Al³⁺ is less than that in Mg²⁺.

Reason (R): The effective nuclear charge on the outermost electrons in Al³⁺ is greater than that in Mg²⁺.

The correct option among the following is

Electromagnetic radiations having λ = 310 Å are subjected to a metal sheet having work function = 12.8 eV. What will be the velocity of photoelectrons with maximum Kinetic energy.

Azide ion [N₃^-] exhibits an (N−N) bond order of 2 and may be represented by the resonance structures I,II and III given below:

The most stable resonance structure is

C—Cl bond in  (vinyl chloride) is stabilised in the same way as in

The precise  equations representing the oxidation of H₂O₂ is/are

In the general electronic configuration -

(n - 2)f^1-14 (n - 1)d^0-1 ns², if value of n = 7 the configuration will be -