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.
i want 20 physical changes and 20 chemical changes
Breaking of glass is a physical change or chemical change ?
WHY DO WHALES AND DOLPHINS KEEP COMING UP TO THE WATER SURFACE?
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 ?
why is melting of ice to form water considered as physical change
Making of curd from milk is a physical change.How?
write difference between physical and chemical change
why should we not put staniless steel spoon in pickle jars?
eruption of volcano is a chemical change.
is it true or false
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
is breathing physical or chemical change ?
Give one example of a chemical reaction showing change of state from Gas to Liquid
in which city do you expect rusting to be a greater problem-in delhi or in mumbai ?why?
Is the folding of paper a chemical change or a physical change?
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.
why are physical changes are generally reversible?
WHY ARE VENTILATORS MADE CLOSE TO CEILINGS?
When a bulb is switched on, it gives out light and heat. Is it a chemical change or a physical change? Why?
the process of depositing a layer of zinc on iron is called ?
what is CuSO4+Fe=?
what is the reaction between
vinegar and baking soda?
what is the chemical equation for baking soda+vinegar...
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) ---->
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 boiling of rice a chemical change or physical ?
justify the statement that physical changes can be reversible as well as irreversible?
why are physical change and chemical change important ???????????
What is the atomicity of magnesium
why is rust formed on iron ?
Explain how painting of an iron gate prevents it from rusting.
why falling of leaves from trees is a chemical change?
difference between atom and molecule
What do you mean by distilled water?
Is galvanization a chemical or phisical change?
iron pipes coated with zinc do not rust easily.give reasons.
Curdling of milk is an irreversible change
melting of polar ice caps is physical change or chemical change
explain crystiallization and how crystal of copper sulphate prepared?
is melting of butter reversible or erreversible? how
Why is Stainless Steel preferred to make utensils?
What are physical changes? Give 5 examples.
Growing of a baby . Is physical or chemical change
very short note on rusting of iron
making of sugar solution is a physical or chemical change????
why does the cut surface of brinjal turn brown?
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 !!!!!
breaking of bones in human body is a physical or 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 would justify rusting as a chemical change?
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?
how to balance Ca3(PO4)2 +H2SO4=CaSO4+Ca(H2PO4)3
Copyright © 2021 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)