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Login2 mL of sodium hydroxide solution is added to a few pieces of granulated zinc metal taken in a test tube. When the contents are warmed a gas ecolces which is bubbled through a soap solution before testing. 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 an acid.
Or
The pH of a salt used to amke tasty and crispy pakoras is 8.4. Identify the salt and write a chemical equation for its formation. List its two uses.
Class 10 Chemistry in Class 10 3 years ago
`Zn(s)+2NAOH(aq)tounderset("Sodium Zincate")(Na_(2)ZnO_(2))(aq)+H_(2)(g)`
Candle FLAME is brought in contact with the bubbles of hydrogen after PASSING through the soap solution. The gas burns brightly with popping sound. Same gas will EVOLVE when the metal reacts with dilute solution of acid such as HCl or `H_(2)SO_(4).`
Or
The salt with pH 8.4 is sodium hydrogen carbonate. For the details, CONSULT section 2.14.
Posted on 04 Dec 2021, this text provides information on Class 10 related to Chemistry in Class 10. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
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