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What happens when Magnesium ribbon is burnt in air?If the product obtained is mexed with water,then what is the nature os that aqueous solution.
i want 20 physical changes and 20 chemical changes
WHY DO WHALES AND DOLPHINS KEEP COMING UP TO THE WATER SURFACE?
Breaking of glass is a physical change or chemical change ?
list some chemical compounds and their chemical formulas which we use in our daily life????
formation of clouds is a physical change explain
Describe two changes that are harmful. Explain why you consider them harmful .How can you prevent them ?
What type of change is- growth of plants? (physical/chemical) Explain.
write difference between physical and chemical change
why should we not put staniless steel spoon in pickle jars?
Reaction between Vinegar and lime juice makes carbon dioxide.How?
WHEN BAKING SODA IS MIXED WITH LEMON JUICE , BUBBLES ARE FORMED WITH THE EVOLUTION OF GAS . WHAT TYPE OF CHANGE IS IT? EXPLAIN
When a soda water bottle is opened, a gas is released. Does a chemical reaction occur?
c is the symbol of carbon.what else does it represent?
in which city do you expect rusting to be a greater problem-in delhi or in mumbai ?why?
valency of aluminium in Al2(SO4)3
is breathing physical or chemical change ?
Making of curd from milk is a physical change.How?
Balance the equation-
Fe + O2 + H2O ---->Fe2O3
Give one example of a chemical reaction showing change of state from Gas to Liquid
misuse of science ? uses of science ? advantages and disadvantages of science
eruption of volcano is a chemical change.
is it true or false
Burning of candle involves both physical and chemical changes. Explain.
WHY ARE VENTILATORS MADE CLOSE TO CEILINGS?
the process of depositing a layer of zinc on iron is called ?
what is CuSO4+Fe=?
Is the folding of paper a chemical change or a physical change?
what is the chemical equation for baking soda+vinegar...
what is rusting?
baking soda is mixed with lemon juice,
bubbles are formed with the evolution of a gas. What type of change
is it? Explain.
is melting of butter reversible or erreversible? how
Is boiling of rice a chemical change or physical ?
justify the statement that physical changes can be reversible as well as irreversible?
What is the atomicity of magnesium
why is rust formed on iron ?
Growing of a baby . Is physical or chemical change
Explain how painting of an iron gate prevents it from rusting.
difference between atom and molecule
CLASSIFY THE FOLLOWING AS PHYSICAL OR CHEMICAL CHANGES .also justify it. :
a.eating a vada.
b.frying an egg.
c.a petrol can is left open in the garage.the vapour fills the garage.
e.melted wax turns into vapour and then burns.
f.rani applied henna to her palms.
g.raghav poured milk in his cornflakes.
h.raja finds his cake of soap getting smaller each week.
i.sam burnt the toaster.
j.the milk turned sour.
k.mrs.iyer cooked rice and made a tasty pudding.
l.carbon dioxide is cooled until it turns into solid "dry ice"which is used for refrigetion.
What do you mean by distilled water?
Curdling of milk is an irreversible change
Is galvanization a chemical or phisical change?
Breaking down of ozone is a physical or chemical change?Why ??? (EXPLAIN)
explain how soaking cut vegies in water prevents their browning
Why is Stainless Steel preferred to make utensils?
Balance the equation
(NH4)3PO4+Pb(NO3)4 gives Pb3(PO4)4 +NH4NO3
why are physical change and chemical change important ???????????
What are physical changes? Give 5 examples.
very short note on rusting of iron
melting of polar ice caps is physical change or chemical change
Why do ships suffer a lot of damage from rusting in spite of being painted ? Experts plz send the quick as possible becoz I have science exam tommorow plz quick !!!!!
how would justify rusting as a chemical change?
When a bulb is switched on, it gives out light and heat. Is it a chemical change or a physical change? Why?
why does ship suffer a lot of damage from rusting in spite of being painted
how to balance Ca3(PO4)2 +H2SO4=CaSO4+Ca(H2PO4)3
what is chemical change??
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