10 Class Science Pre Board II 2024-25: St. Margaret School

10th Science Pre Board – II Examination 2024-25: St. Margaret Sr. Sec. School, Prashant Vihar, Sector 14, Rohini, Delhi-85 India

School Name:	St. Margaret Sr. Sec. School, D-BLOCK, Prashant Vihar, Sector 14, Rohini, New Delhi 110085 India
Class:	10th Standard (CBSE) – Pre Board – II Examination 2024-25
Subject:	Science
Time Duration:	03 Hours
Maximum Marks:	80
Date:	13 December, 2024

General Instructions: 10th Science Pre-board Test

Important Instructions: There are 8 pages in the question paper. Page 1 is given below – rest 3 are in attached PDF.

1. The question paper contains of five sections A, B, C, D and E. There are 39 questions in 5 Sections.
2. All questions are compulsory. However, internal choices have been provided. A student has to attempt one of the alternatives In such questions.
3. Section A consists of 20 objective type questions carrying 1 Mark each.
4. Section B consists of 6 Very Short Questions carrying 2 marks each. Answers to these questions should In the range of 30 to 50 word.
5. Section c consists of 7 Short Questions carrying 3 marks each. Answers to these questions should In the range of 50 to 50 word.
6. Section D consists of 3 long Answer Questions carrying 5 Marks each. Answer to these questions should be in the range of 80 to 120 words.
7. Section E consists of 3 Source / case based units assessment of 4 marks each with sub-parts

Section – A

Select and write one most appropriate option out of the four options given for each of the questions 1 – 20

Question 01: In electrolytic refining of copper, the electrolyte used is:

1. CuO
2. Cu(OH)₂
3. Acidified CuSO₄ (aq)
4. CuSO₄ (s)

Question 02: Which of the following statements about ne given reaction are correct?

3Fe(s) + 4H₂0(g) ——-> Fe₃O₄(g) + 6H₂(g)

(i) Iron metal is getting oxidized
(ii) Water is getting reduced
(ii) Water is acting as reducing agent
(iv) Water is acting as an oxidizing agent

1. (i), (ii) and (iii)
2. (ii) and (iv)
3. (i), (ii) and (iv)
4. (ii) and (Iv)

Question 03: CH₃CH₂OH CH₃COOH, alkaline KMnO4 acts as:

1. oxidizing agent
2. reducing agent
3. dehydrating agent
4. catalyst

Question 04: In an attempt to demonstrate electrical conductivity through an electrolyte, the following apparatus was set up.

For remaining questions – please refer PDF displayed below: