English

Balance the Following Equation : Fe + H2o → Fe3o4 + H2

Advertisements
Advertisements

Question

Balance the following equation :

Fe + H2O → Fe3O4 + H2

One Line Answer
Advertisements

Solution

3 Fe + 4H2O → Fe3O4 + 4H2

shaalaa.com
  Is there an error in this question or solution?
Chapter 5: Language of Chemistry - Additional questions

APPEARS IN

Selina Concise Chemistry [English] Class 7 ICSE
Chapter 5 Language of Chemistry
Additional questions | Q 4.2

RELATED QUESTIONS

MULTIPLE CHOICE QUESTIONS

Tick the most appropriate answer.

Reduction reaction is the exact opposite of

  1. displacement reaction
  2. decomposition reaction
  3. oxidation reaction
  4. none of these

FILL IN THE BLANK

In a double decomposition precipitation reaction both the reactants must be ............ soluble.


TRUE \ FALSE

Evaporation of water is a physical change. True or false ?


What are homogenous reactions ?


Fill in the blank:

The basic conditions necessary for a chemical reaction is _______


Name the type of chemical reaction shown by the following equation:

2Mg + O2 → 2MgO


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.


Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.

Sodium chloride


What do you understand by precipitation reaction? Explain with examples.


Give a chemical test to distinguish between the following gases. 

H2 and O2


Write your observation and a balanced equation in the case of the following substances being heated.

Copper nitrate. 


Give reason for the following:

Even though rusting is an exothermic reaction, the heat evolved when an iron nail rusts is unnoticeable.


Give balanced equation for the following conversion affected by heat alone on the substance:

Zinc carbonate to zinc oxide


Give two examples where a chemical reaction is accompanied by a change in colour of the reactants and products on completion of the reaction.


If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.

Do you think formation of rust from iron is a chemical change?


The simplest method of preventing rusting of iron is to coat it with oil, grease, or paint. The reason being ______.


Heat may evolve or be absorbed during a ______ change.


______ are substances that speed up the process of a chemical change and it will not undergo any change during the course of the reaction.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×