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Tikayat Mohapatra asked a question
Subject: Chemistry, asked on on 22/12/13

what is balanced chemical equation?
Mahak asked a question
Subject: Chemistry, asked on on 29/6/13

what would the valency of the following radicles:

MnO4

,CrO4,

AlO2

,PbO2,

ClO,

SiO

3,ZnO2
Kartik Melwani asked a question
Subject: Chemistry, asked on on 4/10/13

balanced chemical equation explain?
Shaweta asked a question
Subject: Chemistry, asked on on 20/1/14

Name an oxidising agent which does not contain oxygen.
Arghya Agrawal asked a question
Subject: Chemistry, asked on on 8/10/16
Name a physical change that is irreversible and a chemical change which is reversible.
Mahak asked a question
Subject: Chemistry, asked on on 13/5/13

Fe2O3+2Al=Al2O3+2Fe

the chemical equationfor this reaction is?
Jasmine asked a question
Subject: Chemistry, asked on on 13/1/14

How is decomposition method helpful in both industries and domestic use?
Aishu asked a question
Subject: Chemistry, asked on on 24/7/17
Potassium chloride is mixed with water and stirred well. The salt solution obtained when boiled leaves a residue. What is the name of that residue
Gyan Ranjan Sinha asked a question
Subject: Chemistry, asked on on 1/10/13

Calculate the mass of magnisium oxide when 24 g of magnisium react with 32 g of oxygen . also find the weight of oxygen left unused after the reaction.

[AT Wt of Mg= 24, Ca=40]
Shaweta asked a question
Subject: Chemistry, asked on on 23/9/13

Please explain me the process of Fractional Crystallisation.
Aman Kumar asked a question
Subject: Chemistry, asked on on 30/3/17
What is the difference between matter and material??
 
Prakashan asked a question
Subject: Chemistry, asked on on 15/7/13

 is there any explantion on the characteristics of chemical change:

i.e. Evolution of gases, Change of colour  , Formation of Precipitate, Energy Changes and Change in State

The Chapter is Transformation Of Substances(Chemistry) Grade 8
Vaibhav Verma asked a question
Subject: Chemistry, asked on on 23/12/13

why wood is a compound ? what are its constituent?
Roja asked a question
Subject: Chemistry, asked on on 8/10/16
A sample of air contains nitrogen,oxygen n saturated with water vapour under a total pressure of 640mm.If the vapour pressure of water at that temperature is 40 mm n the molecular ratio of n2:o2 is 3:1 the partial pressure of nitrogen in the sample is
Mahak asked a question
Subject: Chemistry, asked on on 29/6/13

ClO3 what is the chemical name of the chemical and its valency ?
Aadrita Laha asked a question
Subject: Chemistry, asked on on 28/7/13

Why do we use sulphuric acid for the electrolysis of water and not any other acid like nitric acid or sulphuric acid?
Ashwathi Pravin asked a question
Subject: Chemistry, asked on on 13/6/13

hi, i dont understand how to balance a equation.. plz can u clear it for me??
Kartik Melwani asked a question
Subject: Chemistry, asked on on 6/10/13

define chemical reaction
Rushil Agrawal asked a question
Subject: Chemistry, asked on on 6/7/15
What will the density of the stone be if the weight of the stone is 15 gramsand is put in a 4ml of water.After putting the stone the water level increased to 7ml.
Harsh Singhal asked a question
Subject: Chemistry, asked on on 22/9/13

why is the growth of a tree a physical change ?
Sanjani asked a question
Subject: Chemistry, asked on on 17/6/17
why heating a platinum wire is a reversible change?
Sarashika Eakambaram asked a question
Subject: Chemistry, asked on on 29/8/13

in the examples of physical changes,growth of a plant is also mentioned.i do not understand how the growth of a plant is a physical change.please explain
Sayantan Sadhukhan asked a question
Subject: Chemistry, asked on on 6/8/13

What happens when Powdered sulpheris heated gently? Is it a chemical change? Explain Why?
Kapil asked a question
Subject: Chemistry, asked on on 31/1/16
Give reason 
Freezing of water to ice and evaporation of water are physical changes
 
Sanjani asked a question
Subject: Chemistry, asked on on 13/6/17
on the basis of kinetic theory explain why ammonium chloride sublimes and goes from solid state directly into vapour state.
Swali Tiwari asked a question
Subject: Chemistry, asked on on 5/1/15
define rancidity?
Vishnu asked a question
Subject: Chemistry, asked on on 8/9/14

list 10 physical changes and 10 chemical changes
Aadrita Laha asked a question
Subject: Chemistry, asked on on 28/7/13

Why do we use sulphuric acid for the electrolysis of water and not any other acid like nitric acid or sulphuric acid?
Sarashika Eakambaram asked a question
Subject: Chemistry, asked on on 4/7/13

 in the video on chemical change,there is a spelling error. during is typed as durning.please correct the mistake.
Ankur Ravindra Kushwaha asked a question
Subject: Chemistry, asked on on 29/9/13

how much hcl gas will be prepared by 7g of h2 ?how much cl2 would be required for the reaction?
Aadvika asked a question
Subject: Chemistry, asked on on 11/7/18
Dust in air is an example of ( hetrogeneous/homogeneous) mixture
Ayush Dash asked a question
Subject: Chemistry, asked on on 28/7/13

What is precipitation reaction ? i did not understand it.
Sarthak Sharma asked a question
Subject: Chemistry, asked on on 27/5/14

how does the common salt dissolves in water
Parthiv Banerjee & 1 other asked a question
Subject: Chemistry, asked on on 30/8/15

what is high specific heat capacity
Anuj Kumar Chaturvedi asked a question
Subject: Chemistry, asked on on 1/11/14

Combustion of LPG is a chemical reaction. State as many characteristics as possible associated with this reaction.
Prasanth Prabhakaran asked a question
Subject: Chemistry, asked on on 28/6/16
write the name using roman numerals
Ag2O,FeO,Hg2I2,MnO2,Pb(NO3)2
Purnajita Saha asked a question
Subject: Chemistry, asked on on 16/9/15
WRITE A SHORT NOTE ON POSITIVE CATALYST GIVING ONE EXAMPLE.
Achyus asked a question
Subject: Chemistry, asked on on 29/10/13

is

'N2 +O2 =2NO'

or

'N2 + O2 = NO2'
Neel asked a question
Subject: Chemistry, asked on on 31/8/13

It should be kept in mind that coefficient ‘3’ will be written as 3BaSO4and not as (BaSO4)3. please explain why ?
Sonika asked a question
Subject: Chemistry, asked on on 28/7/13

what is an electrolyte?

a substance allows the passage of electric current in solution or molten state
Rishta Kothari asked a question
Subject: Chemistry, asked on on 4/12/16
How much magnesium must be burnt in oxygen to obtain 1kg of magnesium oxide
Sanjani asked a question
Subject: Chemistry, asked on on 17/6/17
why addition of zinc to dilute nitric acid is a chemical change?
Sayantan Sadhukhan asked a question
Subject: Chemistry, asked on on 9/8/13

What dowe observe when-

a]dilutesulphuric acid is added to granulated zinc?

b]a few pieces of ironare dropped in a blue solution of copper sulphate?

c]solid lead nitrate is heated?
Vaibhav Verma asked a question
Subject: Chemistry, asked on on 24/12/13

what are alkali ?
Swali Tiwari asked a question
Subject: Chemistry, asked on on 12/1/15
define homogeneous and heterogeneous
mixture.
Samar Singh asked a question
Subject: Chemistry, asked on on 12/7/13

 can you show me a vedio for chromatography
Mahak asked a question
Subject: Chemistry, asked on on 29/6/13

how much exact time did these things written following takes to decompose

1. vegetable

2. nylon cloth

3. cotten cloth

4. plastic

5. leaves
Sudhruti Mishra asked a question
Subject: Chemistry, asked on on 11/8/16
What is the main component of common salt?
Anurag Singh asked a question
Subject: Chemistry, asked on on 29/7/13

i can't understand how can a chemical reactions result in the formation of precipitate? Please help me fast my exams are after 2 days!
Ankur Ravindra Kushwaha asked a question
Subject: Chemistry, asked on on 29/9/13

in thermal cracking of methane, calculate the amounts of carbon and hydrogen that can be prepared by cracking 452 kg of methane?
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