SUBJECT:SCIENCE 15/06/2020 VIRTUAL ONLINE CLASSES CH-4 METALS AND NON-METALS CLASS DETAIL AND CLASS HOME WORK

SUBJECT:SCIENCE 
15/06/2020
VIRTUAL ONLINE CLASSES

CH-4 METALS AND NON-METALS



TOPIC TAUGHT:

  • Chemical properties of metal and non metal (contd..)
  1. Reaction with oxygen.
  2. Reaction with water.
  3. Reaction with acid.
  4. Reaction with base.(today)
  • Displacement reaction.(today)
NOTE:

  • Watch VIDEO NO.5 from between us portal.
  • TRY OUT to solve the WORKSHEET 1 given  in between us portal.
  • TRY OUT to solve the TEXTUAL EXERCISE OBJECTIVE QUESTION IN TEXTBOOK ONLY given  in between us portal.


HOMEWORK:

Q.1 fill in the blanks:
1.Metals do not react with __________such as ammonium chloride.
2.Some metals reacts with bases to produce ________ gas.
3.During _________ reaction, a more active metal displaces a less active metal from its salt solution.
4.Metals have been arranged in the decreasing order of reactivity in a series called as_______.

Q.2 Answer the following :

1. Write the chemical reaction between iron  and copper sulphate.
2.Write the chemical reaction between zinc  and copper sulphate.
3.Write the chemical reaction between copper  and zinc sulphate.
4.Write the chemical reaction between iron  and zinc sulphate.
5.Write the chemical reaction between zinc and sodium hydroxide.

Q.3 (a)Define Displacement reaction and also write one example.
   (b).write the reactivity series (learn it ).
(c)give reasons:Metals below hydrogen in the reactivity series, do not react with dilute acids.

Q.4 state the following as true or false:

1.The reactivity series also gives information about displacement reactions.
2. Metals such as copper, silver and gold either react with concentrated acids or do not show any reactions at all.
3.The reactions between non-metals and bases cannot be generalised..
4.Metals such as sodium, calcium and aluminium react readily with dilute sodium hydroxide and dilute potassium hydroxide.
5. In reactivity series,the most reactive metal is kept at the bottom of the series and the least reactive metal, platinum, is kept at the top.

  • LEARN  THE REACTIVITY SERIES BY THE TRICK IN RED









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