Good to know your interest before preparing for MNS exam you need to know the exam pattern and syllabus which will help you to prepare well by planning the schedule with respect to the syllabus-

Indian Army MNS General English Syllabus

• Synonyms/ Homonyms
• Antonyms
• Spot the error
• Fill in the blanks
• Spellings
• Detecting Mis-spelt words
• Idioms and phrases
• One word substitutions
• Shuffling of sentence parts
• Shuffling of Sentences in a passage
• Improvement
• Cloze passage
• Comprehension passage

Indian Army MNS Exam Syllabus 2020 – General Intelligence

• Analysis
• Number Series
• Observation
• Judgment
• Space Visualization
• Decision Making
• Problem Solving
• Similarities and Differences
• Figure Classification
• Visual Memory
• Relationship Concepts
• Non-Verbal Series
• Arithmetical Computation
• Analytical Functions etc

Indian Army MNS Syllabus for Physics

• Laws of Motion & Work, Energy, and Power
• Properties of Matter
• Electrostatics
• Current Electricity
• Magnetic Effects of Electric Current
• Electromagnetic Induction and Alternating Current
• Optics
• Dual Nature of Radiation and Atomic Physics
• Nuclear Physics
• Semiconductor Devices and their Applications

Indian Army MNS Syllabus for Biology

• Taxonomy
• Cell and Molecular Biology
• Reproduction
• Genetics and evolution
• Human health and diseases
• Biochemistry
• Plant physiology
• Human physiology
• Biotechnology and its applications
• Biodiversity, ecology, and environment

Syllabus of MNS 2020 for Chemistry

• Atomic Structure
• p,d, and f – Block Elements
• Coordination Chemistry and Solid State Chemistry
• Thermodynamics, Chemical Equilibrium, and Chemical Kinetics
• Electrochemistry
• Isomerism in Organic Compounds
• Alcohols and Ethers
• Carbonyl Compounds
• Carboxylic Acids and their derivatives
• Organic Nitrogen Compounds and Biomolecules

hope it helps!

Good luck!