Khulna Board · Chemistry
6 questions · 10 marks each
Scenario: A concept from Periodic Table is being studied. (a) Define the key term used in "Which of these is a noble gas?". [1] (b) Explain the underlying principle. [2] (c) Apply it to the given problem and solve. [3] (d) Justify whether the result "Ar" is unique. [4]
Scenario: A concept from Bonds is being studied. (a) Define the key term used in "Water molecule has how many hydrogen atoms?". [1] (b) Explain the underlying principle. [2] (c) Apply it to the given problem and solve. [3] (d) Justify whether the result "2" is unique. [4]
Scenario: A concept from Acids is being studied. (a) Define the key term used in "pH of pure water at 25°C is:". [1] (b) Explain the underlying principle. [2] (c) Apply it to the given problem and solve. [3] (d) Justify whether the result "7" is unique. [4]
Scenario: A concept from Reactions is being studied. (a) Define the key term used in "Which is an oxidising agent?". [1] (b) Explain the underlying principle. [2] (c) Apply it to the given problem and solve. [3] (d) Justify whether the result "O₂" is unique. [4]
Scenario: A concept from Organic is being studied. (a) Define the key term used in "Simplest alkane is:". [1] (b) Explain the underlying principle. [2] (c) Apply it to the given problem and solve. [3] (d) Justify whether the result "Methane" is unique. [4]
Scenario: A concept from Periodic Table is being studied. (a) Define the key term used in "Which of these is a noble gas?". [1] (b) Explain the underlying principle. [2] (c) Apply it to the given problem and solve. [3] (d) Justify whether the result "Ar" is unique. [4]