Description

Previous Year Nios Question Paper with Answer Chemistry (313) Class Senior Secondary Exam Session October/November 2024

If you are here, Nios Chemistry (313) Solved Question Paper November 2024 Exam Class 12. you have to grab it now for best exam practice & know the examination pattern for upcoming exam. Check Sample – https://www.youtube.com/playlist?list=PLR_YKO4FmoJpDXSiu-oq-61ae5qWSKj6X

CHEMISTRY

(313)

Time: 3 Hours]                                                                                                                                          [ Maximum Marks: 80

Note:

(i) This question paper consists of 43 questions in all.

(ii) All questions are compulsory.

(iii) Marks are given against each question.

(iv) Use log tables if necessary.

(v) Section A consists of

(a) Q. No. 1 to 16 – Multiple choice type questions (MCQs) carrying 1 marks each. Select and write the most appropriate option out of the four options given in each of these questions.

(b) Q. No. 17 to 28 – Objective type questions. Q. No. 17 to 28 carry 2 mark each (with 2 sub-parts of 1 mark each). Attempt these questions as per the instructions given for each of the questions 17 to 28.

(vi) Section B consists of

(a) Q. No. 29 to 37 – Very short answer type questions carrying 2 marks each to be answered in the range of 30 to 50 words.

(b) Q. No. 38 to 41 – Short answer type questions carrying 3 marks each to be answered in the range of 50 to 80 words.

(c) Q. No. 42 and 43 – Long answer type questions carrying 5 marks each to be answered in the range of 80 to 120 words.

(1) Answers of all questions are to be given in the Answer-Book given to you. (2) 15 minutes time has been allotted to read this question paper. The question paper will be distributed at 2:15 p.m. From 2:15 p.m. to 2:30 p.m., the students will read the question paper only and will not write any answer on the Answer-Book during this period.

 SECTION – A

Note: Q. No. 1 to 16 are multiple choice questions of 1 mark each.

1. One atomic mass unit is equal to: 1

(A) Mass of one mole of C−12 atoms

(B)

 

(C) Mass of one C−12 atom×12

(D)

Ans.

(B)

 

2. In every chemical reaction, total mass of all the reactants is equal to the total mass of all the products. This statement is according to:

(A) Law of constant proportions                                          (B) Law of multiple proportions

(C) Law of conservation of mass                                           (D) Postulates of Dalton’s atomic theory

Ans. (C) Law of conservation of mass

3. In the species , the number of protons, neutrons and electrons respectively are: 1

(A) 80, 119, 80                (B) 80, 199, 80                (C) 119, 80, 119              (D) 199, 80, 199

Ans. (A) 80, 119, 80

4. The ratio of the number of moles of one component to the total number of moles in the solution is known

as:                                                                                                                                                                                                             1

(A) Molarity                     (B) Molality                      (C) Normality                                 (D) Mole fraction

Ans. (D) Mole fraction

5. Adiabatic processes proceeds with: 1

(A) a change in temperature

(B) no change in temperature

(C) a change in pressure

(D) an exchange of heat between the system and the surroundings

Ans. (A) a change in temperature

 

6. The standard enthalpy of atomisation of a substance is the change in enthalpy when: 1

(A) One mole of a substance is converted into its atoms in gaseous state at 25°C and 1 bar pressure.

(B) One molecule of a substance is converted into its atoms in gaseous state at 25°C and 1 bar pressure.

(C) One mole of a substance is converted into its atoms in gaseous state at a given temperature and 1 bar pressure.

(D) One molecule of a substance is converted into its atom in gaseous state at a given temperature and 1 bar pressure.

Ans. (A) One mole of a substance is converted into its atoms in gaseous state at 25°C and 1 bar pressure

 

7. The extent of ionisation of weak acids or bases and the strength of weak acids or a bases are:

(A) directly related to each other                                                        (B) inversely related to each other

(C) exponentially related to each other                                             (D) not related to each other

Ans. (A) directly related to each other

 

8. Bronsted – Lowry concept of an acid and a base is based on:                               1

(A) donation of  ion and O ion respectively

(B) formation of  ion and OH− ion

(C) donation of proton and acceptance of proton respectively

(D) acceptance of proton and donation of proton respectively

Ans. (C) donation of proton and acceptance of proton respectively

 

9. The factors affecting conductivity of an electrolyte are: 1

(A) nature of the electrolyte and temperature

(B) nature of the electrolyte and concentration

(C) temperature and concentration

(D) nature of the electrolyte, temperature and concentration

Ans. (D) nature of the electrolyte, temperature and concentration

 

10. Which of the following is not a function of salt bridge? 1

(A) It completes the inner circuit.

(B) It completes the outer circuit.

(C) It maintains electrical neutrality.

(D) It prevents accumulation of charges in the two half cells.

Ans. (B) It completes the outer circuit.

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