Q3 of 44 Page 1

Which of the following statements about the given reaction is correct?

3Fe(s) + 4H2O→ Fe3O4 + 4H2


a. Iron metal is getting oxidised.


b. Water is getting reduced.


c. Water is acting as reducing agent.


d. Water is acting as oxidising agent.

Fe is gaining oxygen to give Fe3O4. H2O is losing oxygen to give H2. The substance which oxidises the other substance in a chemical reaction is known as an oxidising agent and the substance which reduces the other substance in a chemical reaction is called as reducing agent.

More from this chapter

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1

Which of the following is not a physical change?

 2

The following reaction is an example of a

4NH3 (g) +5O2 (g) → 4NO (g) +6H2O (g)


1. displacement reaction


2. combination reaction


3. redox reaction


4. neutralisation reaction

 4

Which of the following are exothermic processes?

1. Reaction of water with quick time


2. Dilution of an acid


3. Evaporation of water


4. Sublimation of camphor (crystals)

 5

Three beakers labelled as A, B and C each containing 25 mL of water were taken. A small amount of Na0H, anhydrous CuSO2 and NaCl were added to the beakers A, B and C respectively. It was observed that there was an increase in the temperature of the solutions contained in beakers A and B, whereas in case of beaker C, the temperature of the solution falls. Which one of the following statement (s) is (are) correct?

1. In beakers A and B, exothermic process has occurred.


2. In breakers A and B, endothermic process has occurred.


3. In breaker C, exothermic process has occurred.


4. In beaker C, endothermic process has occurred.