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प्रश्न
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
The conversion of ferrous sulphate to ferric sulphate is ______ reaction.
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उत्तर
The conversion of ferrous sulphate to ferric sulphate is an oxidation reaction.
Explanation:
Oxidation means losing one or more electrons. During this conversion, Fe2+ is converted into Fe3+ by losing one electron. Therefore, it is an oxidation reaction.
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संबंधित प्रश्न
When carbon dioxide is passed through lime water, it turns milky due to the formation of ______.
When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.
How do the following help in bringing about a chemical change?
light.
Fill in the blank.
The formation of gas bubbles in a liquid during a reaction is called ......................
Name the type of chemical reaction shown by the following equation:
NaOH + HCl → NaCl + H2O
A solution of a substance ‘X’ is used for white washing Name the substance ‘X’ and write its formula.
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)
A colourless solution of calcium hydroxide in a test tube turns ______ on blowing in it through a blow tube for some time.
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.
Explain by writing a word equation.
Respiration is a chemical change.
Give reason for the following:
Molybdenum is used in the manufacture of ammonia.
Multiple choice:
Thermal decomposition of sodium carbonate will produce
State the original colour of the following substance and colour of residue obtained after heating.
Zinc carbonate
A chemical reaction is often accompanied by external indications or characteristics which include –
- Colour change
- Effervescence or gas evolved
- Evolution or absorption of heat
- Formation of a precipitate.
With reference to each of the above indications, state the external indication seen during – Addition of dilute hydrochloric acid to silver nitrate.
Give balanced equation for the following conversion affected by heat alone on the substance:
Copper carbonate to copper oxide
Give a suitable example with an equation to show the representation of a chemical reaction.
A chemical reaction is often accompanied by external indications or characteristics.
Discuss how acid rain occurs due to emission of smoke from vehicles and industries?
A reaction between an acid and a base is called ______.
The water we drink is a combination of hydrogen and oxygen.
Classify each of the following, as a physical or a chemical change. Give reasons.
(a) Drying of a shirt in the sun.
(b) Rising of hot air over a radiator.
(c) Burning of kerosene in a lantern.
(d) Change the colour of black tea by adding lemon juice to it.
(e) Churning of milk cream to get butter.
