Question: Write the name, stereochemistry and magnetic behaviour of the following: (At. nos. Mn = 25, Co = 27, Ni = 28) (i) K4[Mn(CN)6] (ii) [Co(NH3)5Cl]Cl2 (iii) K2[Ni(CN)4] (To remember: Oxidation state of K is +1 Oxidation state of CN is -1 Oxidation state of NH3 is 0 Oxidation state of Cl is -1) […]
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This question is from Organic chemistry section of JEE Advance 2019. First time when you see this question, it looks a bit difficult. Don’t lose your confidence. I’ll tell you how easy it is. We have to apply the basic organic reactions and named reactions, that’s it!! In this question, set of reactions are given
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What is base? According to Lewis theory of acids and bases, a base is the one which has the availability of electrons to donate to an acid. Here, we need to find the stronger base among benzyl amine and aniline. A stronger base will be the one whose electrons are easily available for donation. Structure
Which is more basic in nature? Benzyl amine or aniline. Read More »
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),
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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
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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
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In this post we, will discuss about the quantum numbers and its types. The set of numbers used to describe the position and energy of the electron in an atom are called quantum numbers. There are four quantum numbers, namely, principal, azimuthal, magnetic and spin quantum numbers. Electronic quantum numbers (the quantum numbers describing electrons)
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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
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