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0:08:13

Justify that the reaction:2Cu2O (s) + Cu2S (s) → 6Cu (s) + SO2 (g) is a redox reaction...

0:06:55

Using stock notation represent following compounds: HAuCl4, Ti2O, FeO, Fe2O3, CuI, CuO, MnO and MnO2

0:03:58

Justify that the reaction: 2Na (s) + H2 (g) → 2NaH (s) is a redox change.

0:09:27

In the reaction given below, identify the species undergoing oxidation and reduction:

0:04:37

What will be the molarity of a solution, which contains 5.85g of NaCl (s) per 500mL?

0:02:37

If 500mL of a 5M solution is diluted to 1500mL, what will be the molarity of the solution obtained?

0:03:31

In one molal solution that contains 0.5 mole of a solute, there is (i) 500mL of solvent......

0:04:10

The empirical formula and molecular mass of a compound are CH2O and 180g respectively. What will...

0:02:45

If the density of a solution is 3.12 g mL^-1, the mass of 1.5mL solution in significant figures is …

0:02:18

A measured temperature on Fahrenheit scale is 200oF. What will be this reading be on Celsius scale?

0:04:25

What is the basic difference between the terms electron gain enthalpy and electronegativity?

0:03:11

Would you expect the second electron gain enthalpy of O as positive, more negative or less....

0:04:19

Calculate the energy in joule corresponding to light of wavelength 45nm. (Planck's constant.......

0:04:00

Be2+ is isoelectronic with which of the following ions?(i) H+ (ii) Li+ (iii) Na+ (iv) Mg2+

0:02:47

The energies E1 and E2 of two radiations are 25 eV and 50 eV respectively. The relation between....

0:03:22

The value of Planck's constant is 6.63 X 10^-34 Js. The speed of light is 3 X 10^17 nm s-1.....

0:05:12

A mixture of gases contains H2 and O2 gases in the ratio of 1:4 (w/w). What is the molar ratio of...

0:06:40

Suppose the elements X and Y combine to form two compounds XY2 and X3Y2. When 0.1mole of XY2 weighs

0:03:42

At STP, the density of CCl4 vapour in g/L will be nearest to _____________.

0:03:07

What is the change in oxidation number of carbon in the following reaction ?

0:02:47

The number of protons, neutrons and electrons in 175Lu71 , respectively, are:

0:05:56

An organic compound contains 78% (by wt.) carbon and remaining percentage of hydrogen......

0:01:56

What would be the IUPAC name and symbol for the element with atomic number 120?

0:14:05

It has been found that the pH of a 0.01M solution of an organic acid is 4.15....