Q. 154.5( 53 Votes )
a) Write two observations when lead nitrate is heated in a test tube.
b) Name the type of reaction.
c) Write a balanced chemical equation to represent the above reaction.
a) i) When Lead nitrate is heated it produces a yellow precipitate of Lead monoxide.
ii) It also produces a brownish colored fume (gas) which is Nitrogen dioxide along with oxygen.
b) This is Decomposition type of chemical reaction. Decomposition reaction is a reaction which in compound is decomposed into its constituent compounds.
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PREVIOUStwo statements are given- one labeled Assertion (A) and theother labeled Reason (R). Select the correct answer to these questions from the codes (i), (ii),(iii) and (iv) as given belowAssertion: A fuse wire is always connected in parallel with the mainline.Reason: If a current larger than the specified value flows through the circuit, fuse wire melts.NEXT(I) A compound ‘X’ of Sodium is used as an antacid and it decomposes on strong heating.a) Name the compound ‘X’ and give its chemical formula.b) Write a balanced chemical equation to represent the decomposition of ‘X’.c) Give one use of compound ‘X’ besides antacid.OR(II) You are provided with 90 ml distilled water and 10 ml concentrated Sulphuric acid to prepare dilute Sulphuric acid.a) What is the correct way of preparing dilute Sulphuric acid? Give reasons.b) How will the concentration of ion change on dilution?
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