How many vertical columns are there in the Modern Periodic Table? Answer - In the Modern Periodic Table, there are 18 vertical columns of...

Define groups. Answer - The vertical columns in the long form of the Periodic Table are called groups.

What was the drawback of the Law of Octaves? Answer - Law of Octaves failed to assign the position to the elements with large atomic...

State Newlands' Law of Octaves. Answer - Newlands' Law of Octaves states that "when elements are arranged in order of increasing atomic...

State Mendeleev's Periodic Law. [CBSE 2019] Answer - Mendeleev's Periodic Law states that, "The physical and chemical properties of the...

What was Dobereiner's basis of classifying elements? Answer - According to Dobereiner, elements having similar properties can be arranged...

1. Differentiate between adsorption and absorption. 2. Physisorption is reversible while chemisorption is irreversible. Why ? 3. What is...

1. Define Linkage Isomerism. Give an example of linkage isomerism. 2. Define Coordination Isomerism. Give an example of coordination...

Important questions from Alcohol, Phenol and Ethers 1. Write the structure of the molecule of a compound whose IUPAC name is...

Top 10 Question for Board Exam - 01 Chapter – Solution 1. Define the following terms molarity, molality and mole fraction. What is the...

1. Which stoichiometric defect does not change the density of the crystal? 2. What type of stoichiometric defect is shown by AgCl? 3....

Top 10 Question for Board Exam - 01 Chapter - Solid State 1. “Crystalline solids are anisotropic in nature.” What does this statement...

Get here the CBSE Study Material for Class 10 Social Science subject. This study material has been specially prepared for the upcoming...

In CBSE Class 10, Science is one of the most important subjects especially for those students who want to pursue this subject in their...

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Class 12 Chemistry Standard XII 11 Years CBSE Champion Chapterwise Topicwise Questions and Solutions NCERT( 2007 to 2017 ) Useful for IIT...

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