SCIENCE [SEBA] Selected Important Questions


001 Science

Last Updated on October 20, 2024 by studentabc.xyz

SCIENCE [SEBA] Selected Important Questions

Q:- Fe203+2Al→Al203+2Fe [ HSLC Yr-2018 & 2016] Mark=1

The above reaction is an example of

(a) a combination reaction

(b) a decomposition reaction

(c) a displacement reaction

(d) a double displacement reaction 

Q:- What happens when dilute hydrochloric acid is added to iron fillings ? [HSLC’2017] Mark=1

(a) Hydrogen gas and iron chloride and produced.

(b) Chlorine gas and iron hydroxide and produced.

(c) No reaction take place

(d) Iron salt and water are produced.

Q:- You take an aqueous solution of CuSO4 (blue in colour) in a test tube . Now dip a clean iron nail in CuS04 solution. Observe the  test tube after 20 minutes (approx) [HSLC-2017] Marks-2

(i) Mention the change of the nail

(ii) Write a balanced chemical equation for the reaction

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What To Know

  • – You take an aqueous solution of CuSO4 (blue in colour) in a test tube .
  • Now dip a clean iron nail in CuS04 solution.
  • (ii) Write a balanced chemical equation for the reaction.
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