Select Board & Class
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.
formation of clouds is a physical change explain
i want 20 physical changes and 20 chemical changes
What type of change is- growth of plants? (physical/chemical) Explain.
Breaking of glass is a physical change or chemical change ?
eruption of volcano is a chemical change.
is it true or false
list some chemical compounds and their chemical formulas which we use in our daily life????
Describe two changes that are harmful. Explain why you consider them harmful .How can you prevent them ?
Making of curd from milk is a physical change.How?
why should we not put staniless steel spoon in pickle jars?
write difference between physical and chemical change
WHEN BAKING SODA IS MIXED WITH LEMON JUICE , BUBBLES ARE FORMED WITH THE EVOLUTION OF GAS . WHAT TYPE OF CHANGE IS IT? EXPLAIN
is breathing physical or chemical change ?
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
Give one example of a chemical reaction showing change of state from Gas to Liquid
under which two conditions do decomposition reaction normally take place?
in which city do you expect rusting to be a greater problem-in delhi or in mumbai ?why?
Balance the equation-
Fe + O2 + H2O ---->Fe2O3
setting of curd is
chemical or physical change
misuse of science ? uses of science ? advantages and disadvantages of science
Burning of candle involves both physical and chemical changes. Explain.
Growing of a baby . Is physical or chemical change
WHY ARE VENTILATORS MADE CLOSE TO CEILINGS?
the process of depositing a layer of zinc on iron is called ?
what is CuSO4+Fe=?
WHY DO WHALES AND DOLPHINS KEEP COMING UP TO THE WATER SURFACE?
what is the chemical equation for baking soda+vinegar...
Balance the equation
(NH4)3PO4+Pb(NO3)4 gives Pb3(PO4)4 +NH4NO3
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.
A bottle containing a perfume is by mistake left open. After a few days, its volume was found to have reduced to half. Expain giving reason.
Is boiling of rice a chemical change or physical ?
justify the statement that physical changes can be reversible as well as irreversible?
Findthe odd one outwith reason:
a. Cutting of nails,breaking of glass,formation of iron sulphide.
b.Permanent,reversible,change in composition.
c.Alloying ,galvanization ,crystallisation.
What is the atomicity of magnesium
why is rust formed on iron ?
Explain how painting of an iron gate prevents it from rusting.
difference between atom and molecule
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)
why are physical change and chemical change important ???????????
Why is Stainless Steel preferred to make utensils?
What are physical changes? Give 5 examples.
very short note on rusting of iron
Is the folding of paper a chemical change or a physical change?
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 !!!!!
When a bulb is switched on, it gives out light and heat. Is it a chemical change or a physical change? Why?
explain crystiallization and how crystal of copper sulphate prepared?
how would justify rusting as a chemical change?
how to balance Ca3(PO4)2 +H2SO4=CaSO4+Ca(H2PO4)3
why does ship suffer a lot of damage from rusting in spite of being painted
Copyright © 2020 Applect Learning Systems Pvt. Ltd. All rights reserved.
E.g: 9876543210, 01112345678
We will give you a call shortly, Thank You
Office hours: 9:00 am to 9:00 pm IST (7 days a week)