CBSE Notes, Papers, NCERT Solutions - NextGurukul
Reaction of calcium oxide in water to form calcium hydroxide CaO + H 2 O → Ca(OH) 2 Combination reactions between elements and compounds: In these reactions elements and compounds combined to form product. Example: Formation of sulphur trioxide by the combination of sulphur dioxide and oxygen. 2SO 2 + O 2 → 2SO 3 Decomposition reaction:
CBSE Notes, Papers, NCERT Solutions - NextGurukul
Chemical reaction: The process of combination of different atoms to form different products is known as chemical reaction. Chemical reaction involves a change in the physical and chemical properties like: Change in the colour of the substance; Change in the state of the substance; Change in heat energy - Absorption of energy or release of energy
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CBSE Notes, Papers, NCERT Solutions - NextGurukul
Detailed explanation with examples on types-of-chemical-reactions helps you to understand easily . QnA , Notes & Videos & sample exam papers
2. In a certain change, color and the magnetic properties of a substance changed. What reaction might this be? (A) Chemical combination. (B) Photochemical reaction. (C) Irreversible reaction (D) Physical change 3. Oxygen is used in hospitals for? (A) Burning wastage (B) Artificial respiration (C) Fermentation (D) Decomposition Section - B 4.
CBSE Notes, Papers, NCERT Solutions - NextGurukul
Detailed explanation with examples on oxidation-and-reduction helps you to understand easily . QnA , Notes & Videos & sample exam papers
Write the equation of the chemical reaction involved and the test to detect the gas. Name the gas which will be evolved when the same metal reacts with dilute solution of a strong acid. OR The pH of a salt used to make tasty and crispy pakoras is 14. Identify the salt and write a chemical equation for its formation. List its two uses. 11.
Preparation, Properties and Uses of Ethene - NextGurukul
Ethene occurs in nature in free state in small quantities in plants. In combination, ethene is found in various sources such as natural gas and coal gas. Preparation of ethene: In the laboratory ethene is prepared by dehydration of ethanol. On heating ethyl alcohol with sulphuric acid at a temperature of 170 ° C temperature forms ethene.
CBSE Notes, Papers, NCERT Solutions - NextGurukul
Detailed explanation with examples on preparation-properties-and-uses-of-hydrogen-chloride helps you to understand easily .
CBSE Notes, Papers, NCERT Solutions - NextGurukul
Detailed explanation with examples on laws-of-chemical-combination-and-daltons-atomic-theory helps you to understand easily , designed as per NCERT.