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Atoms and Molecules

Ionic compounds

Last Updated on March 20, 2019 By Mrs Shilpi Nagpal 1 Comment

Question 1 What are ionic compound? Question 2 What are covalent compounds? Question 3 Define chemical bond? Question 4 Why noble gases do not react? Question 5 What are ions? Question 6 How ions are formed? Question 7 What are cations.How they are formed? Question 8 Give example of cation formation? Question 9 What are anions? Question 10 How anions … [Read more...] about Ionic compounds

Atoms and Molecules

Last Updated on August 19, 2020 By Mrs Shilpi Nagpal Leave a Comment

Law of conservation of mass

Question 1 Which Indian philosopher suggested that all matter is composed of ver small particles.What name was given by him to these particles? Question 2 What is law of conservation of mass?Give example? Question 3 What is meant by law of constant proportion?Give example? Question 4 Name the scientist who gave law of conservation of mass? Question 5 Name the … [Read more...] about Atoms and Molecules

Mole concept

Last Updated on March 20, 2019 By Mrs Shilpi Nagpal 20 Comments

number of moles

Question 1 Define a mole?   Question 2 What is the value of Avogadro's constant?   Question 3 Define mole of an atom?   Question 4 Define mole of a molecule?   Question 5 Write the formula to calculate the number of moles?   Mole Concept   In a chemical reaction equation,it is more convenient to use quantity of substance in number of its molecules or atoms rather … [Read more...] about Mole concept

Gram molecular mass

Last Updated on March 20, 2019 By Mrs Shilpi Nagpal 1 Comment

Question 1 What is gram molecular mass? Gram Molecular mass The amount of a substance whose mass in grams is numerically equal to its molecular mass,is called gram molecular mass of that substance. The molecular mass of a substance expressed in grams is called gram molecular mass. To write gram molecular mass of a substance ,we write its molecular mass and then … [Read more...] about Gram molecular mass

Valency of ion

Last Updated on March 20, 2019 By Mrs Shilpi Nagpal Leave a Comment

CCl4

Question 1 Define the term valency? Question 2 What are monovalent ion.Give example? Question 3 What are divalent ion.Give example? Question 4 What are trivalent ion.Give example? Question 5 What do you mean by chemical formulae of a compound? Question 6 What are the steps to write chemical formulae of a compound? Question 7 What is gram atomic … [Read more...] about Valency of ion

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