CBSE Class 12 Chemistry Daily Practice Questions 20 October 2023

CBSE Class 12 Chemistry Daily Practice Questions 20 October 2023

CBSE Class 12 Chemistry Daily Practice Questions for 20 October 2023: Candidates are advised to solve CBSE Class 12th Chemistry practice questions daily to understand the concepts of chemistry better, It helps students to identify the areas where they need more practice and focus. Regular practice of CBSE Class 12 chemistry questions improves problem-solving skills, boosts their confidence, and prepares students for board exams effectively.

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CBSE Class 12 Chemistry Daily Practice Questions for 20 October 2023

Students can analyse their CBSE Class 12 Chemistry exam performance by solving daily practice questions shared below.

Question 1: Multiple-Choice Questions

The donor atoms in ethylene diamine tetra acetate ion are

(a) two N and two O

(b) two N and four O

(c) four N and two O

(d) three N and three O

Question 2: Very Short Answer Type Question

Write one similarity in between Physisorption & Chemisorption.

Question 3: Short Answer Type Question

Name the polymers used in laminated sheets and give the name of monomeric units involved in its formation.

Also Read | CBSE likely to revise Class 10, 12 Exam Dates 2024 due to Lok Sabha and Assembly Elections

Question 4: Case-Based Question

Ozone is an unstable, dark blue diamagnetic gas. It absorbs the UV radiation strongly, thus protecting the people on earth from the harmful UV-radiation from the sun. The use of chlorofluorocarbon (CFC) in aerosol and refrigerator and their subsequent escape into the atmosphere, is blamed for making holes in the ozone layer over Antarctica. Ozone acts as a strong oxidising agent in acidic and alkaline medium. For this property, ozone is used as a germicide and disinfectant for sterilizing water. It is also used in laboratory for the ozonolysis of organic compounds and in industry for the manufacture of potassium permanganate, artificial silk, etc.

The following questions are multiple choice question. Choose the most appropriate answer:

(i) Which of the following statements is not correct for ozone?

(a) It oxidises lead sulphide

(b) It oxidises potassium iodide

(c) It oxidises mercury

(d) It cannot act as bleaching agent in dry state.

(ii) Ozone gives carbonyl compounds with

(a) alkyl chloride

(b) alkanes

(c) alkenes followed by decomposition with Zn/ H2O

(d) alcohols followed by decomposition with Zn/H2O.

(iii) Ozone reacts with moist iodine gives

(a) HI

(b) HIO3

(c) I2O5

(d) I2O4

(iv) Ozone acts as an oxidising agent due to

(a) liberation of nascent oxygen

(b) liberation of oxygen gas

(c) both (a) and (b)

(d) none of these

(v) The colour of ozone molecule is

(a) white

(b) blue

(c) pale green

(d) pale yellow

Question 5: Long Answer Type Question

Which of the following polymers soften on heating and harden on cooling? What are the polymers with this property collectively called? What are the structural similarities between such polymers? Bakelite, urea-formaldehyde resin, polythene, polyvinyl, polystyrene.

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