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Subject: Science, asked on 23/1/17

Fe + S = FeS is this equation endothermic or exothermic ??

Subject: Science, asked on 19/1/17

what  is  orthopaedic ?

Subject: Science, asked on 22/12/16

When an ant sting a person, the solution of substance A is rubbed on the stung area of the skin to get relief from pain. The substance A is also used in kitchen for cooking purposes. Another substance B is sour in taste and contains organic acid C. It is used in making pickle. When solution of A is mixed with B then a change D takes place to produce bubbles of gas E.
(i) Name the following - A, B, C, D and E
 

Subject: Science, asked on 15/12/16

Classify the following into physical or chemical changes:-
A. A glass bottle breaking
B. Making a cake
C. Tearing of paper
D. Formation of cloud
E. Drying of clothes
F. Formating of rust

Subject: Science, asked on 14/12/16

is crystallization a physical change?

Subject: Science, asked on 12/12/16

baking soda +aerated drink gives what​

Subject: Science, asked on 4/12/16

How will you prove that copper is a better conductor of heat than iron?

Subject: Science, asked on 20/11/16

Give chemical & word equation for all chemical changes in the chapter.

Subject: Science, asked on 18/11/16

if an equation has '+ heat' written on its right-hand side, what type of reaction it is
 

Subject: Science, asked on 13/11/16

Explain with the help of an activity that what happens when an iron nail is kept immersed in copper sulphate solution ? Write a word equation

Subject: Science, asked on 8/11/16

in glucose is energy absorbed or evolved

Subject: Science, asked on 3/11/16

Give an example where rusting is useful...

Subject: Science, asked on 10/10/16

plz experts balance this equation :

.CaO +HNO3 = CaNO3 +H2O
​.Ca(CO3)2 = CaO2 +CO2
 

Subject: Science, asked on 7/10/16

how is impure common salt purified ?

Subject: Science, asked on 5/10/16

why is the transformation of ice into steam is not a chemical change ?? 

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