The energy released when an electron is added to a neutral gaseous atom is called ______ of the atom.

The oxidation number of carbon in CH₂O is

Hydroxylamine reduces iron (III) according to the equation:

2NH₂OH + 4Fe³⁺ $$\to$$ N₂O(g) $$ \uparrow $$ + H₂O + 4Fe²⁺ + 4H⁺

Iron (II) thus produced is estimated by titration with a standard permanganate solution. The reaction is :

$$MnO_4^-$$ + 5Fe²⁺ + 8H⁺ $$\to$$ Mn²⁺ + 5Fe³⁺ + 4H₂O

A 10 ml sample of hydroxylamine solution was Diluted to 1 litre. 50 ml of this diluted solution was boiled with an excess of iron (III) solution. The resulting solution required 12 ml of 0.02 M KMnO₄ solution for complete oxidation of iron (II). Calculate the weight of hydroxylamine in one litre of the original solution. (H = 1, N = 14, O = 16, K =39, Mn = 55, Fe = 56)

The mass of a hydrogen atom is ______ kg.

Isotopes of an element differ in the number of ______ in their nuclei.

When there are two electrons in the same orbital, they have _____ spins.

The outer electronic configuration of the ground state chromium atom is 3d⁴ 4s²

Calculate the wavelength in Angstrom of the photon that is emitted when an electron in the Bohr orbit, n = 2 returns to the orbit, n = 1 in the hydrogen atom. The ionization potential of the ground state hydrogen atom is 2.17 $$\times$$ 10^-11 erg per atom.

The element with the highest first ionization potential is

There are ______ $$\pi$$ bonds in a nitrogen molecule.

____ hybrid orbitals of nitrogen atom are involved in the formation of ammonium ion.

The ion that is isoelectronic with CO is

Among the following, the molecule that is linear is

The compound with no dipole moment is

Helium atom is two times heavier than a hydrogen molecule. At 298 K, the average kinetic energy of a helium atom is

At room temparature, ammonia gas at 1 atm pressure and hydrogen chloride gas at P atm pressure are allowed to effuse through identical pin holes from opposite ends of a glass tube of one metre length and of uniform cross-section. Ammonium chloride is first formed at a distance of 60 cm from the end through which HCL gas is sent in. What is the value of P?

MgCl₂.6H₂O on heating give anhydrous MgCl₂

How will you prepare bleaching powder from slaked lime.

Write down the balanced equations for the reaction when:
An alkaline solution of potassium ferricyanide is reacted with hydrogen peroxide.