Chemistry Test ...

How many moles of magnesium phosphate, Mg₃ (PO₄ )₂ will contain 0.25 mole of oxygen atoms?

When an electron is added to neutral gaseous atom to convert it into a negative ion, the enthalpy change accompanying the process is called:

For emission line of atomic hydrogen from ni to n_f = 8, the plot of wave number against is:

(The Rydberg constant, RH is in wave number unit).

Two pi and half sigma bonds are present in:

Adsorption of a gas follows Freundlich adsorption isotherm. In the given plot, x is the mass of the gas adsorbed on mass m of the adsorbent at pressure p. x/m is proportional to

The total number of isotopes of hydrogen and number of radioactive isotopes among them, respectively, are:

0.5 moles of gas A and x moles of gas B exert a pressure of 200 Pa in a container of volume 10 m³ at 1000 K. given R is the gas constant in JK^-1 mol^-1 m, x is :

In general, the properties that decrease and increase down a group in the periodic table, respectively, are:

Phenyl diazonium salts form azo dye with

(1) Aniline

(2) Phenol

(3) N, N–dimethylaniline

(4) Anisole (methoxybenzene)

Of these statements :

Low spin complex is formed by

Which of the following hybridization pattern best describes the carbon atom in NCO⁻ ?

What is the shape and magnetic nature of permanganate ions?

“The mass and energy both are conserved in an isolated system”, is the statement of

The number of π-bonds present in benzoic acid molecule are

The combining ratios of hydrogen and oxygen in water and hydrogen peroxide are 1: 8 and 1 : 16. Which law is illustrated in this example?

The precipitation power of an electrolyte increases with

The highest oxidation state in plutonium (At. no. = 94) is