## Significant figures

Significant figures- Significant figures- “The significant figures of a number are digits that carry meaningful contributions to its measurement Continue Reading »

## Significant figures calculation

Significant figures Calculations involving Significant figures- Rule 1- When addition & subtraction of digits is carried out, the Continue Reading »

## Rounding off the Numbers

Rounding off the Numbers Rounding off the Numbers- Round to the Nearest Hundred Ex- 1650 i) Identify the Continue Reading »

## Classification of matter

Classification of matter- Classification of matter- MATTER– It occupies space & possesses mass, it can exist in three Continue Reading »

## Rank the following atoms and molecules based on which would effuse the fastest. i) H2 ii) He iii) N2 iv) CO2 v) H2S

Question – Rank the following atoms and molecules based on which would effuse the fastest. i) H2 ii) He Continue Reading »

## Kohlrausch law- Applications

Kohlrausch law- source : slideplayer.com Applications of Kohlrausch law- 1) Calculation of degree of ionisation and ionisation constant- Degree Continue Reading »

## Find the solubility of MnS in neutral water in gm/l .Ksp of MnS = 2.6 x 10-14

Find the solubility of MnS in neutral water in gm/l ? Ksp of MnS = 2.6 x 10-14. Solution Continue Reading »

## If the initial concentration of cyclopropane is 0.0501 M. What will the cyclopropane concentration after 352minutes.The reaction is first order. Rate constant = 3.36 x 10-5 sec-1.

Question – If the initial concentration of cyclopropane is 0.0501 M. What will the cyclopropane concentration after 352 minutes. Continue Reading »

## What is the concentration of KMnO4 solution in mole/litre which gives an absorbance of 0.120 when measured in a 2.0 cm cell ?

Question – What is the concentration of KMnO4 solution in mole/litre which gives an absorbance of 0.120 when measured Continue Reading »

## The rate constant for a reaction was measured as a function of temperature. A plot of lnK versus T ( in kelvin ) is linear and has a slope.Find the activation energy ?

Q – The rate constant for a reaction was measured as a function of temperature. A plot of lnK Continue Reading »