How are sub-parts presented in the answer sheet?

Each sub-part (a, b, c, etc.) is treated as a separate part under the same question and should be answered accordingly.

What is the marking pattern for Q1?

Q1 consists of five sub-parts, each carrying 8 marks, totaling 40 marks.

Is there any restriction on word limits?

Yes, adhere to the word limit if specified within the questions.

Where can the exam be accessed?

The paper is available via the regional Haryana government jobs quiz pages, e.g., the provided URL.

HCS Chemistry 2023 Mains Question Paper

Name: HCS Chemistry 2023 Mains Question Paper
Creator: Haryana Government
Keywords: Schrödinger equation, hydrogen atom, VSEPR theory, molecular geometry, NH3 H2O SF6 XeF6, defects in solids, stoichiometric defects, non-stoichiometric defects, internal energy, enthalpy, ideal gas, thermodynamics, Na+ K+ Ca2+ physiology, Heisenberg principle, uncertainty principle

Haryana Government Jobs Administrative / Civil Services 2023

Year 2023
Conducted By Haryana Government
Questions 2
Maximum Marks 200
Duration 3 Hours
Languages English & Hindi

Exam Details

Detail	Information
Examination	Chemistry
Year	2023
Conducting Body	Haryana Government
Paper	HCS (Ex.Br.) & Other Allied Services Mains Exam
Subject	Chemistry
Duration	3 Hours
Maximum Marks	200
Number of Questions	2
Question Type	Descriptive / Subjective

This dataset compiles the Chemistry paper for the 2023 Haryana HCS (Ex.Br.) & Other Allied Services Mains exam. Page 1 outlines general instructions, two-section structure, and compulsory questions. Page 2 (Section A) presents two descriptive questions, each with multiple subparts. Q1 covers Schrödinger wave equation, VSEPR theory, solid-state defects, thermodynamics of ideal gases, and biological ion roles, with English and Hindi stems. Q2 contains Heisenberg Uncertainty Principle and a mass calculation example based on Δx and Δv. The OCR repair aligns two-language question stems and preserves subparts for precise SEO-friendly metadata across topics, keywords, and FAQs.

Major Topics Covered

Schrödinger equation
Hydrogen atom
VSEPR theory
Molecular geometry
NH3 geometry
H2O geometry
SF6 geometry
XeF6 geometry
Defects in solids
Stoichiometric defects
Non-stoichiometric defects
Thermodynamics
Internal energy
Enthalpy
Ideal gas
Temperature dependence
Na+, K+, Ca2+ in physiology
Heisenberg Uncertainty Principle
Uncertainty in position and velocity
Mass calculation via Δx and Δv

Why This Paper is Important

Useful for Chemistry preparation
Helps understand the latest exam pattern
Useful for practice and self-assessment
Covers frequently asked General Studies topics
Helpful for analysing question trends

Related Resources

Instructions

2023 Chemistry रसायन विज्ञान Time: 3 hours Maximum Marks: 200 समय: 3 घंटे अधिकतम अंक: 200

This paper is divided into two Sections, Section-A and Section-B. ये प्रश्नपत्र दो खंडों में विभाजित है, खंड-A और खंड-B
Each Section contains four (4) questions. प्रत्येक खंड में चार प्रश्न है।
Candidate has to attempt five questions in all. परीक्षार्थी को पांच प्रश्नों का उत्तर लिखना है।
Question Nos. 1 and 5 are compulsory and out of the remaining, THREE questions are to be attempted choosing at least ONE question from each Section. प्रश्न संख्या 1 और 5 अनिवार्य है और शेष प्रश्नों में से किन्हीं तीन का उत्तर लिखना है, प्रत्येक खंड से एक प्रश्न को हल करना है।
Word limit in questions, where specified, should be adhered to. प्रश्नों में शब्द सीमा, जहाँ विनिर्दिष्ट है, का अनुसरण किया जाना चाहिए।
The number of marks carried by a question/part is indicated against it. प्रत्येक प्रश्न/ भाग के लिए नियत अंक उसके सामने दिए गए हैं।
Questions are printed in English & Hindi languages.
In case of any ambiguity in translation of any question, English version shall be treated as final. प्रत्येक प्रश्न हिन्दी और अंग्रेजी दोनों भाषाओं में छपा है। प्रश्नों के अनुवाद में किसी अस्पष्टता की स्थिति में, अंग्रेजी सस्करण को ही अन्तिम माना जाएगा। a bra n'i la marao FE 34.6 PST In the layer file the senior for surprise the ma A - and yoff and y powerfloods and tend (1) Chemistry / 2023

Questions (page 2)

Q0. 1(a) Derive Schrödinger wave equation for the wave mechanical model for atomic structure and discuss its application to hydrogen atom.
परमाणु संरचना के लिए तरंग यांत्रिक मॉडल के लिए श्रोडिंगर तरंग समीकरण प्राप्त करें और हाइड्रोजन परमाणु पर इसके अनुप्रयोग पर चर्चा करें。

() (a) Derive Schrödinger wave equation for the wave mechanical model for atomic structure and discuss its application to hydrogen atom.
परमाणू संरचना के लिए तरंग यांत्रिक मॉडल के लिए श्रोडिंगर तरंग समीकरण प्राप्त करें और हाइड्रोजन परमाणु पर इसके अनुप्रयोग पर चर्चा करें।

Q0.

() (b) Enumerate postulates and limitations of VSEPR theory. Predict molecular geometry of NH3, H2O, SF6 and XeF6.
वीएसईपीआर सिद्धांत की अभिधारणाओं और सीमाओं की गणना करें। NH3, H2O, SF6 और XeF6 की आणविक ज्यामिति की भविष्यवाणी करें।

Q0.

() (c) Give an account of stoichiometric and non-stoichiometric defects in solids with suitable examples.
उपयुक्त उदाहरणों के साथ ठोस पदार्थों में स्टोइकोमेट्रिक और नॉन_स्टोइकोमेट्रिक दोषों का विवरण दीजिए।

Q0. 1(d) Prove thermodynamically that, a. Internal energy for an ideal gas is independent of its volume at constant temperature.
किसी आदर्श गैस की आंतरिक ऊर्जा स्थिर तापमान पर उसके आयतन से स्वतंत्र 'होती है।

() (d)(a) Prove thermodynamically that, a. Internal energy for an ideal gas is independent of its volume at constant temperature.
किसी आदर्श GAS की आंतरिक ऊर्जा स्थिर तापमान पर उसके आयतन से स्वतंत्र होती है।

Q0. 1(d) Prove thermodynamically that, b. Enthalpy of an ideal gas is function of temperature only.
एक आदर्श गैस की एन्थैल्पी केवल तापमान के फलन के रूप में होती है।

() (d)(b) Prove thermodynamically that, b. Enthalpy of an ideal gas is function of temperature only.
एक आदर्श गैस की एन्थैल्पी केवल तापमान के फलन के रूप में होती है।

Q0.

() (e) Discuss the role of Na+, K+ and Ca2+ in human physiology.
मानव शरीर क्रिया विज्ञान में Na+, K+ और Ca2+ की भूमिका पर चर्चा करें।

Q0. 2(a) i. Explain the Heisenberg Uncertainty Principle.
हाइजेनबर्ग अनिश्चितता सिद्धांत की व्याख्या करें.

() (i) Explain the Heisenberg Uncertainty Principle.
हाइजेनबर्ग अनिश्चितता सिद्धांत की व्याख्या करें।

Q0. 2(a) ii. Calculate the mass of a particle, if uncertainty in the position and velocity of a particle are 10^-10 m and 5.27 x 10^-24 m s^-1 respectively.
एक कण के द्रव्यमान की गणना करें, यदि किसी कण की स्थिति और वेग में अनिश्चितता क्रमशः 10^-10 मीटर और 5.27 x 10^-24 मीटर सेकंड^-1 है।

() (ii) Calculate the mass of a particle, if uncertainty in the position and velocity of a particle are 10^-10 m and 5.27 x 10^-24 m s^-1 respectively.
एक कण के द्रव्यमान की गणना करें, यदि किसी कण की स्थिति और वेग में अनिश्चितता क्रमशः 10^-10 मीटर और 5.27 x 10^-24 मीटर सेकंड^-1 है।

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Frequently asked questions

How many sections are in the exam?

The exam is divided into Section A and Section B.

How many questions must be answered by candidates?

Candidates must answer five questions in total.

Which questions are compulsory?

Questions 1 and 5 are compulsory.

Are questions available in both languages?

Yes, questions are printed in English and Hindi.

What topics are covered in Q1 of Section A?

Q1 topics include Schrödinger equation for atomic structure, VSEPR theory, defects in solids, thermodynamics of ideal gases, and roles of Na+/K+/Ca2+ in physiology.

What topics are covered in Q2 of Section A?

Q2 includes Heisenberg Uncertainty Principle and a mass calculation using uncertainty in position and velocity.

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