RRB NTPC Graduate Tier 1

2025

Shift-1

Algebra 3

All Questions 3 Algebraic Identities 1 Quadratic Equations 1 Variation and Proportion 1

Arithmetic 20

All Questions 20 Average 2 Compound Interest 1 Fractions and Decimals 1 HCF and LCM 1 Percentages 3 Problems on Ages 1 Profit and Loss 2 Ratio and Proportion 2 Simple Interest 1 Simplification 2 Time and Work 2 Time, Speed and Distance 2

Art and Culture 2

All Questions 2 Indian Dances 2

Biology 1

All Questions 1 Human Diseases 1

Computer Applications 3

All Questions 3 File Management 1 MS Office 2

Computer Fundamentals 1

All Questions 1 Operating Systems 1

Current Affairs 8

All Questions 8 Defense Exercises 1 Important Days 1 Important Days & Themes 1 Indices and Reports 1 International Affairs 1 International Events 1 National Affairs 1 Reports and Indices 1

Economy 5

All Questions 5 Banking System 1 Demographics 1 Infrastructure Initiatives 1 Infrastructure Projects 1 International Organizations 1

Geography 5

All Questions 5 Agriculture 1 Indian Geography 3 Tribes of India 1

Geometry 4

All Questions 4 Mensuration 3D 2 Polygons 1 Triangles 1

History 5

All Questions 5 Ancient History 1 Medieval History 1 Modern History 3

Mathematics 1

All Questions 1 Number Analogy 1

Polity 5

All Questions 5 Amendments 1 Citizenship 1 Cooperative Societies 1 Indian Constitution 1 Local Government 1

Reasoning 29

All Questions 29 Alphanumeric Series 4 Analogy 3 Blood Relations 1 Classification 2 Coding Decoding 3 Direction Sense 2 Letter Series 1 Mathematical Operations 2 Number Operations 1 Number Sequence 1 Number Series 2 Puzzle Test 2 Ranking 1 Seating Arrangement 2 Syllogism 1 Word Analogy 1

Science & Tech 5

All Questions 5 Chemistry 1 Defense Technology 1 Physics 2 Space Exploration 1

Statistics 2

All Questions 2 Mean 2

Trigonometry 1

All Questions 1 Identities 1

Science & Tech

Chemistry

EN हिंदी

✕

RRB NTPC Graduate Tier 1 2025 Shift-1 📅 09 Jun, 2025

How many molecules are present in 2 moles of CO₂?

A

6.022 × 10²³

B

1.2044 × 10²⁴

C

3.011 × 10²³

D

12.044 × 10²³

Result Summary

APEDIA

RRB NTPC Graduate Tier 1

2025 • 09 Jun, 2025 • Shift-1

How many molecules are present in 2 moles of CO₂?

Correct Answer

1.2044 × 10<sup>24</sup>

Avogadro's Principle: In fundamental chemistry, one mole of any pure chemical substance consistently contains Avogadro's number of distinct elementary entities ......

💡 Analysis & Explanation

Avogadro's Principle ▼

In fundamental chemistry, one mole of any pure chemical substance consistently contains Avogadro's number of distinct elementary entities (like molecules or atoms). This universal constant is precisely 6.022 × 1023.

Mathematical Scaling ▼

The question demands the total molecular count for exactly 2 moles of Carbon Dioxide. Therefore, we must multiply the standard Avogadro constant by the factor of 2.

Execution ▼

2 × (6.022 × 1023) mathematically equates to 12.044 × 1023. Adjusting the decimal place to standard scientific notation transforms this to 1.2044 × 1024.

Conclusion ▼

There are 1.2044 × 1024 molecules present in the given sample.