Advertisements
Advertisements
Question
When electric current is passed through acidulated water ______ of water takes place.
Options
Oxidation
Displacement
Electrolysis
Reduction
zinc
copper
Double displacement
Decomposition
Advertisements
Solution
When electric current is passed through acidulated electrolysis of water takes place.
Explanation:
Water decomposes into hydrogen gas and oxygen gas when electric current is passed through acidulated water. Since decomposition of water takes place by means of electrical energy, it is called electrolysis.
APPEARS IN
RELATED QUESTIONS
How do the following help in bringing about a chemical change?
light.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction is a chemical reaction in which there is
- removal of hydrogen
- removal of oxygen
- addition of oxygen
- none of these
FILL IN THE BLANK
Negatively charged ions are called ..........
Balance the following equation :
Fe + H2O → Fe3O4 + H2
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.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Hydrogen chloride
Give an example of a reaction where the following are involved
Heat
Write the chemical reaction where the following changes are observed.
Physical state is changed
Give balanced equation for the following conversion affected by heat alone on the substance:
Ammonium dichromate to nitrogen
Complete the table given below.
| Addition of dil. H2SO4 to KHCO3 | Name of residue obtained |
Complete the statement by filling in the blank with the correct word:
The reddish-brown precipitate obtained during a double decomposition precipitation reaction between an iron salt and alkali is __________.
What happens when cane sugar is strongly heated? Mention any two changes in it.
The chemical change is ______.
Higher order Thinking question
A very hot glass on putting in cold water cracks. What does this change indicate?
_____ is the basic material to manufacture urea.
Rusting of iron is ______.
Magnesium + oxygen → magnesium oxide.
2Mg + O2 → 2Mg O
Write a note on the catalyst.
Why is spoiling food a chemical change?
______ is the chemical name of slaked lime.
