Sunday , January 17 2021
NCERT 7th Class (CBSE) Science: Chemical and Chemical Changes

10 Class Science Periodic Test I B (2018-19)

10 Class Science Periodic Test I B (2018-19)

School Name: Prince Public School, Pocket-6, Sector-24, Rohini, Delhi 110085 India
Class: X
M.M: 20
Time: 35 min

General Instructions:

  1. This question paper consists of 9 questions in all. All questions are compulsory
  2. Answer the questions after carefully reading the text
  3. Q.No. 1 carry 1 mark
  4. Q.No. 2-6 carries 2 marks each
  5. Q.No. 7-9 carries 3 marks each

Question: 1. What happens when Silver Chloride is exposed to sunlight? Write chemical equation for this reaction.

Question: 2. What is the difference between thermal and thermite reactions? Write equations for these reactions.

Question: 3. What is chemical reaction? Illustrate its properties.

Question: 4. What is an redox equation? Is it exothermic or endothermic? Give one example of redox reaction.

Question: 5. Balance the following chemical reactions.

  1. NH4NO2 → N+ H2O
  2. SO2 + H2S → H2O + S

Question: 6. What happens when

  1. Zink Oxide reacts with Carbon.
  2. Lead Sulphide reacts with Hydrogen per Oxide.

Question: 7. What is observed when the solution of barium chloride is added to potassium nitrate solution? What type of reaction is this? Write a balanced chemical equation for this reaction.

Question: 8. What is rancidity? Explain why, food products containing fats and oil are packed in nitrogen.

Question: 9. In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal. Write down the chemical equation of the reaction involved.

Check Also


11th CBSE NCERT Computer Science Mid Term Exam Set A

11th Class CBSE NCERT Computer Science: Mid Term Examination Set – A (2019-20) Time: 3 Hrs. …

Leave a Reply

Your email address will not be published. Required fields are marked *