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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
Balance the equation
(NH4)3PO4+Pb(NO3)4 gives Pb3(PO4)4 +NH4NO3
list some chemical compounds and their chemical formulas which we use in our daily life????
why is melting of ice to form water considered as physical change
Describe two changes that are harmful. Explain why you consider them harmful .How can you prevent them ?
mixing sugar and lemon in water is what change and why
formation of clouds is a physical change explain
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?
valency of aluminium in Al2(SO4)3
What type of change is- growth of plants? (physical/chemical) Explain.
Balance the equation-
Fe + O2 + H2O ---->Fe2O3
why are physical changes are generally reversible?
Making of curd from milk is a physical change.How?
growth of baby into adult is a physical or chemical change ? please reply fast
in which city do you expect rusting to be a greater problem-in delhi or in mumbai ?why?
what are crystals?how can the crystals of sodium chloride be prepared from table salt?
misuse of science ? uses of science ? advantages and disadvantages of science
why falling of leaves from trees is a chemical change?
Burning of candle involves both physical and chemical changes. Explain.
WHY DO WHALES AND DOLPHINS KEEP COMING UP TO THE WATER SURFACE?
explain crystallization
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?
WHY ARE VENTILATORS MADE CLOSE TO CEILINGS?
the process of depositing a layer of zinc on iron is called ?
Destruction of ozone layer is physical change or chemical change??
what is CuSO4+Fe=?
Breaking down of ozone is a physical or chemical change?Why ??? (EXPLAIN)
When a bulb is switched on, it gives out light and heat. Is it a chemical change or a physical change? Why?
what is the chemical equation for baking soda+vinegar...
eruption of volcano is a chemical change.
is it true or false
what is rusting?
When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.
Give one example of a chemical reaction showing change of state from Gas to Liquid
Is boiling of rice a chemical change or physical ?
is breathing physical or chemical change ?
justify the statement that physical changes can be reversible as well as irreversible?
What is the atomicity of magnesium
Growing of a baby . Is physical or chemical change
why is rust formed on iron ?
Explain how painting of an iron gate prevents it from rusting.
Reaction between Vinegar and lime juice makes carbon dioxide.How?
difference between atom and molecule
explain crystiallization and how crystal of copper sulphate prepared?
What do you mean by distilled water?
Is galvanization a chemical or phisical change?
Curdling of milk is an irreversible change
Iron (Fe) + Oxygen (O2) + Water (H2O) → Rust (Fe2O3)
Q1 WHY THE FE GOT FE2 AND O3 WHICH WAS O2 HOW IT BECAME O3
Q2. I AM NOT SURE BUT IN MY SCHOOL BOOK THE FORMULA OF RUSHTING IS
FE2 O3 . XH20
why are physical change and chemical change important ???????????
is crushing a can a reversible change or irreversible change
Why is Stainless Steel preferred to make utensils?
What are physical changes? Give 5 examples.
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.
very short note on rusting of iron
Which type of change is falling of leaves from trees?
A physical or a chemical one?
melting of polar ice caps is physical change or chemical change
valency of calcium in cacl2
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 !!!!!
what is galvanisation and crystallisation ?
how would justify rusting as a chemical change?
Is the folding of paper a chemical change or a physical change?
how to balance Ca3(PO4)2 +H2SO4=CaSO4+Ca(H2PO4)3
In summers,if milk is not refrigerated,it becomes sour.Which of the following is added by milkmen to fresh milk to prevent the milk from spoiling?
A.Caustic soda B.Potash alum C.Baking soda D.Lime water
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Syllabus
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
Balance the equation
(NH4)3PO4+Pb(NO3)4 gives Pb3(PO4)4 +NH4NO3
list some chemical compounds and their chemical formulas which we use in our daily life????
why is melting of ice to form water considered as physical change
Describe two changes that are harmful. Explain why you consider them harmful .How can you prevent them ?
mixing sugar and lemon in water is what change and why
formation of clouds is a physical change explain
write difference between physical and chemical change
why should we not put staniless steel spoon in pickle jars?
a. X + Y - XY
b. + XY - X + Y
c. AB + XY - AY + XB
d. AB + X - AX + B
e. AB + CD - AD + BC
f. Acid + base - salt + water
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?
valency of aluminium in Al2(SO4)3
What type of change is- growth of plants? (physical/chemical) Explain.
Balance the equation-
rnFe + O2 + H2O ---->Fe2O3
why are physical changes are generally reversible?
Making of curd from milk is a physical change.How?
growth of baby into adult is a physical or chemical change ? please reply fast
in which city do you expect rusting to be a greater problem-in delhi or in mumbai ?why?
what are crystals?how can the crystals of sodium chloride be prepared from table salt?
misuse of science ? uses of science ? advantages and disadvantages of science
why falling of leaves from trees is a chemical change?
Burning of candle involves both physical and chemical changes. Explain.
WHY DO WHALES AND DOLPHINS KEEP COMING UP TO THE WATER SURFACE?
explain crystallization
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?
WHY ARE VENTILATORS MADE CLOSE TO CEILINGS?
the process of depositing a layer of zinc on iron is called ?
Destruction of ozone layer is physical change or chemical change??
what is CuSO4+Fe=?
Breaking down of ozone is a physical or chemical change?Why ??? (EXPLAIN)
When a bulb is switched on, it gives out light and heat. Is it a chemical change or a physical change? Why?
what is the chemical equation for baking soda+vinegar...
eruption of volcano is a chemical change.
is it true or false
2H2O=2H2+O2
what is rusting?
A. Clayey
B. Sandy
C. Loamy
D. None of these
When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.
Give one example of a chemical reaction showing change of state from Gas to Liquid
Is boiling of rice a chemical change or physical ?
is breathing physical or chemical change ?
justify the statement that physical changes can be reversible as well as irreversible?
What is the atomicity of magnesium
Growing of a baby . Is physical or chemical change
why is rust formed on iron ?
Explain how painting of an iron gate prevents it from rusting.
Reaction between Vinegar and lime juice makes carbon dioxide.How?
difference between atom and molecule
explain crystiallization and how crystal of copper sulphate prepared?
What do you mean by distilled water?
Is galvanization a chemical or phisical change?
Curdling of milk is an irreversible change
Iron (Fe) + Oxygen (O2) + Water (H2O) → Rust (Fe2O3)
Q1 WHY THE FE GOT FE2 AND O3 WHICH WAS O2 HOW IT BECAME O3
Q2. I AM NOT SURE BUT IN MY SCHOOL BOOK THE FORMULA OF RUSHTING IS
FE2 O3 . XH20
why are physical change and chemical change important ???????????
is crushing a can a reversible change or irreversible change
Did you recover chalk from the dust?
Pls ansfast.Exams are on head!!!!
Why is Stainless Steel preferred to make utensils?
What are physical changes? Give 5 examples.
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.
very short note on rusting of iron
Which type of change is falling of leaves from trees?
A physical or a chemical one?
melting of polar ice caps is physical change or chemical change
valency of calcium in cacl2
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 !!!!!
what is galvanisation and crystallisation ?
how would justify rusting as a chemical change?
Is the folding of paper a chemical change or a physical change?
how to balance Ca3(PO4)2 +H2SO4=CaSO4+Ca(H2PO4)3
In summers,if milk is not refrigerated,it becomes sour.Which of the following is added by milkmen to fresh milk to prevent the milk from spoiling?
A.Caustic soda B.Potash alum C.Baking soda D.Lime water