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Uttam mazumder

Aug 28, 2013

1. Give reasons:i) Mgcl2 is soluble in water but insoluble in acetone,while methene is insoluble but soluble in acetone.ii) Iron displaces copper from a solution of a copper salt. the reaction is deemed as a redox reaction.



i). Polar molecules dissolves ...

Oct 8, 2014

why are ionic compounds brittle. it is mentioned that they are strongly attached to each other and are hard solids yet it is also written in our book that they are brittle in nature. Can i have a solution to my confusion?



The ionic compounds are very hard and brittle. In ionic compounds  the ions are rigidly held in a lattice because the positive and negative ions are strongly attracted to each other and difficult to separa...

May 1, 2015



Uttam mazumder

Jun 24, 2014



Ambati

May 7, 2014



NH

Keerthy Krishna

Sep 3, 2013

why sodium chloride dissolve in water and carbontetrachloride cannot?



Ans: Polar molecules dissolve in polar substances but not in non polar substances and non polar molecules dissolve in non polar substances but not ...

Uttam mazumder

Aug 28, 2013

1.Name a covalent compound which becomes an ionic compound when dissolved in water.2. Name a compound composed of all the three kinds of bonds.



Ans: 1.Hydrochloric acid (HCl) (and even HF also) is a covalent molecule when dissolved water becomes more polar like ionic molecules.
2. Example for the compound that c...

Uttam mazumder

Aug 19, 2013

1. Iron has valencies 2 & 3,when iron reacts directly with chlorin what is the valency of iron in the resulting compound?Write the equation for the same.2.Name a non-metallic element which reacts with chlorine to give two compounds.Under normal conditions one of these compounds is a liquid and other is a solid.Name the two compounds.



Ans: 1).When iron reacts with chlorine it forms two types of compounds namely Ferrous chloride (FeCl₂) and Ferric chloride (FeCl₃) since the enthalpy of combustion for the formation...

Ujjwal

Aug 10, 2013

Why HF is gas and HCL is liquid while both are covalant bond ?



Hi ! Ujjwal, I, Sunny, am also a student of class 10. Answer of your question is as follows- Whenever you prepare HF or HCl in laboratory, you will always found that both are in gaseous state. Of course, HCl in...

Hyzen Jessiya

Mar 23, 2014



Uttam mazumder

Aug 28, 2013

1. Give reasons:i) Mgcl2 is soluble in water but insoluble in acetone,while methene is insoluble but soluble in acetone.ii) Iron displaces copper from a solution of a copper salt. the reaction is deemed as a redox reaction.



i). Polar molecules dissolves ...

Oct 8, 2014

why are ionic compounds brittle. it is mentioned that they are strongly attached to each other and are hard solids yet it is also written in our book that they are brittle in nature. Can i have a solution to my confusion?



The ionic compounds are very hard and brittle. In ionic compounds  the ions are rigidly held in a lattice because the positive and negative ions are strongly attracted to each other and difficult to separa...

May 1, 2015



Uttam mazumder

Jun 24, 2014



Ambati

May 7, 2014



NH

Keerthy Krishna

Sep 3, 2013

why sodium chloride dissolve in water and carbontetrachloride cannot?



Ans: Polar molecules dissolve in polar substances but not in non polar substances and non polar molecules dissolve in non polar substances but not ...

Uttam mazumder

Aug 28, 2013

1.Name a covalent compound which becomes an ionic compound when dissolved in water.2. Name a compound composed of all the three kinds of bonds.



Ans: 1.Hydrochloric acid (HCl) (and even HF also) is a covalent molecule when dissolved water becomes more polar like ionic molecules.
2. Example for the compound that c...

Uttam mazumder

Aug 19, 2013

1. Iron has valencies 2 & 3,when iron reacts directly with chlorin what is the valency of iron in the resulting compound?Write the equation for the same.2.Name a non-metallic element which reacts with chlorine to give two compounds.Under normal conditions one of these compounds is a liquid and other is a solid.Name the two compounds.



Ans: 1).When iron reacts with chlorine it forms two types of compounds namely Ferrous chloride (FeCl₂) and Ferric chloride (FeCl₃) since the enthalpy of combustion for the formation...

Ujjwal

Aug 10, 2013

Why HF is gas and HCL is liquid while both are covalant bond ?



Hi ! Ujjwal, I, Sunny, am also a student of class 10. Answer of your question is as follows- Whenever you prepare HF or HCl in laboratory, you will always found that both are in gaseous state. Of course, HCl in...

Hyzen Jessiya

Mar 23, 2014