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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.
Breaking of glass is a physical change or chemical change ?
i want 20 physical changes and 20 chemical changes
formation of clouds is a physical change explain
list some chemical compounds and their chemical formulas which we use in our daily life????
mixing sugar and lemon in water is what change and why
Describe two changes that are harmful. Explain why you consider them harmful .How can you prevent them ?
eruption of volcano is a chemical change.
is it true or false
write difference between physical and chemical change
why should we not put staniless steel spoon in pickle jars?
WHEN BAKING SODA IS MIXED WITH LEMON JUICE , BUBBLES ARE FORMED WITH THE EVOLUTION OF GAS . WHAT TYPE OF CHANGE IS IT? EXPLAIN
c is the symbol of carbon.what else does it represent?
When a soda water bottle is opened, a gas is released. Does a chemical reaction occur?
why is melting of ice to form water considered as physical change
valency of aluminium in Al2(SO4)3
Is the folding of paper a chemical change or a physical change?
What type of change is- growth of plants? (physical/chemical) Explain.
WHY DO WHALES AND DOLPHINS KEEP COMING UP TO THE WATER SURFACE?
Balance the equation-
Fe + O2 + H2O ---->Fe2O3
Making of curd from milk is a physical change.How?
in which city do you expect rusting to be a greater problem-in delhi or in mumbai ?why?
misuse of science ? uses of science ? advantages and disadvantages of science
Breaking down of ozone is a physical or chemical change?Why ??? (EXPLAIN)
Burning of candle involves both physical and chemical changes. Explain.
valency of calcium in cacl2
WHY ARE VENTILATORS MADE CLOSE TO CEILINGS?
Give one example of a chemical reaction showing change of state from Gas to Liquid
the process of depositing a layer of zinc on iron is called ?
what is CuSO4+Fe=?
breaking of bones in human body is a physical or chemical change
why are physical change and chemical change important ???????????
what is the chemical equation for baking soda+vinegar...
STATE 5 POINTS OF DIFFERENCE BETWEEN FORMATION OF RUST AND FORMATION OF ICE.
what is rusting?
why does the cut surface of brinjal turn brown?
baking soda is mixed with lemon juice,
bubbles are formed with the evolution of a gas. What type of change
is it? Explain.
Is boiling of rice a chemical change or physical ?
explain crystiallization and how crystal of copper sulphate prepared?
is breathing physical or chemical change ?
why are physical changes are generally reversible?
justify the statement that physical changes can be reversible as well as irreversible?
Balance the equation
(NH4)3PO4+Pb(NO3)4 gives Pb3(PO4)4 +NH4NO3
What is the atomicity of magnesium
why is rust formed on iron ?
When a bulb is switched on, it gives out light and heat. Is it a chemical change or a physical change? Why?
Explain how painting of an iron gate prevents it from rusting.
Destruction of ozone layer is physical change or chemical change??
difference between atom and molecule
What do you mean by distilled water?
Is galvanization a chemical or phisical change?
Growing of a baby . Is physical or chemical change
Curdling of milk is an irreversible change
Reaction between Vinegar and lime juice makes carbon dioxide.How?
Why is Stainless Steel preferred to make utensils?
What are physical changes? Give 5 examples.
very short note on rusting of iron
1.State true or false:
(a) Formation of clouds is a reversible change
2. Classify into chemical and physical change
3. complete the following Equation:
(a) Quick lime (CaO) + Water (H2O) --->
(b) Sulphuric acid (H2SO4) + Zinc (Zn) ----> __________+ Hydrogen
__________ + H2
(c) Copper Sulphate (CuSO4) + Iron (Fe) ----->
(d) Cacium carbonate (CaCO3) _heat_>
(e) Carbon (C) + Sulphur (S) ---->
melting of polar ice caps is physical change or chemical change
Is Magnesium oxide is a reversible 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 !!!!!
LPG IS STORED IN A CYLINDER AS A LIQUID. WHEN YOU BURN IT IN THE STOVE , IT IS IN THE GASEOUS FORM. WHAT KIND OF CHANGES OCCUR DURING THE USE OF LPG?
growth of baby into adult is a physical or chemical change ? please reply fast
how would justify rusting as a chemical change?
AN IRON NAIL IS TAKEN TO THE MOON.ANOTHER IS KEPT NEAR THE GATEWAY OF INDIA ,MUMBAI,WHILE THE THIRD ONE IS KEPT NEAR RED FORT,DELHI.COMPARE THE DEGREE OF RUST FORMATION ON THE THREE NAILS.
how to balance Ca3(PO4)2 +H2SO4=CaSO4+Ca(H2PO4)3
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