It is a question based on stoichiometric calculation. How many moles of UF6 would have to be decomposed to provide enough fluorine to prepare 1.25 mol of CF4 ? (Assume sufficient carbon is available) Solution: The chemical reaction occurs is: UF6→ U + 3F2 ……….. (1) C + 2F2→ CF4 ……….. (2) From reaction (2), […]
Stoichiometric Calculation Based Question Read More »
How many moles of lead(II) chloride will be formed from a reaction between 6.5 g PbO and 3.2 g HCl? Solution: The reaction between PbO and HCl is: PbO + 2 HCl → PbCl2+ H2O From the reaction it is clear that 1 mole PbO reacts with 2 mole of HCl. Now, moles of PbO = Given
In this post, we will discuss about the halogenation of alkane with a previous year question based on it. What is the halogenation of alkane? A halogenation reaction is a chemical reaction between a substance and a halogen in which one or more halogen atoms are incorporated into molecules of the substance. Halogenation of an
Simple Halogenation of alkane Read More »
In this post, we will discuss about Dalton’s Atomic Theory. Dalton based his theory on two laws: the law of conservation of mass and the law of constant composition. The law of conservation of mass says that matter is not created or destroyed in a closed system. That means if we have a chemical reaction, the amount
What is Dalton’s Atomic Theory? Read More »
Question: Radhika made a solution by dissolving 40 g of salt in 100 g of water. Her friend, Saloni took 50 g solution from the solution prepared by Radhika and added 5 g more salt to it. Find the final concentration (w/w%) of this new solution. Solution: Mass of solute = 40 g Mass of
Find final concentration of this new solution. Read More »
Quantum numbers are fundamental concepts in quantum mechanics that play a crucial role in understanding the behavior of electrons in atoms. For students preparing for competitive exams such as JEE and NEET, a solid grasp of quantum numbers is essential for mastering topics related to atomic structure and electron configurations. In this blog post, we
Quantum numbers: Bonus Concept with 25 Questions Read More »
Compound X has the molecular formula C4H10O2. X has an unbranched carbon chain and contains two OH groups. On reaction with an excess of hot alkaline potassium permanganate X is converted into a compound of molecular formula C4H6O4.To which two carbon atoms in the chain of X are the two OH groups attached?A. 1st and
Compound X has the molecular formula C4H10O2. Read More »
This question is word problem of organic chemistry. The question is provided below: Each of the compounds below is treated separately with excess NaBH4. The product of each reaction is then heated with excess concentrated H2SO4. In each case, one or more products are formed with molecular formula C7H10. Which compounds give only one final product with the molecular
Word Problem based question Read More »
Law of multiple proportions states that if two elements form more than one compound, then the ratios of the masses of the second element which combine with a fixed mass of the first element will always be ratios of small whole numbers. This law is sometimes called Dalton’s Law, named after John Dalton, the chemist who first expressed it. 2.66 g chloride
Law of multiple proportions Read More »
In this post we will discuss about mole concept in detail. Have you seen a ₹ 10 note? Probably yes. How about ₹ 100? Probably yes. Most of us have seen the common denominations of Indian currency ranging from ₹ 10 to ₹ 2000. All of these denominations help in the transaction of money. Similarly,
Complete Beginner’s Guide to Mole Concept Read More »
