Advertisements
Advertisements
Question
Balance the following equation :
Fe + H2O → Fe3O4 + H2
Advertisements
Solution
3 Fe + 4H2O → Fe3O4 + 4H2
APPEARS IN
RELATED QUESTIONS
Complete and balance the following chemical equations:
Ba`"CI"_2` + `"H"_2"SO"_4` `→`
(aq.) (aq.)
Give a reason.
Wasp sting is treated with vinegar.
FILL IN THE BLANK
........... electrolytes dissociate completely in aqueous state and allow large amount of electricity to flow through it.
Fill in the blank
A change in which the substance can be brought back to its original state is called a _______ change.
A chemical equation is a statement that describes a chemical change in terms of
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
Rusting of iron is a ______ chemical change.
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
Chlorine (Cl2) molecule is formed by ______ of electrons between two chlorine atoms.
State the conditions necessary for a chemical change or reaction.
State the type of reactions for the following represent and balance the ones that are not balanced.
Cl2 + 2KBr → 2KCl + Br2
State the main characteristics of chemical reactions. Give at least one example in each case.
What do you observe when Cobalt chloride paper is introduced in water vapour.
Give a chemical test to distinguish between the following gases.
H2 and O2
Select the correct answer for the following options:
The black residue obtained on heating copper carbonate.
Complete the table given below.
| Heat on ammonium dichromate | Name of neutral gas evolved |
Photosynthesis is a chemical reaction that takes place in the presence of ______.
Chemists identify gypsum as a natural indicator.
What is the use of indicator?
Write some materials prepared by chemical changes.
Which is used as a catalyst during the process of hydrogenation of oils?
Write five changes in the characteristics of a substance that can take place during a chemical change.
