Hello, after BSc you can apply only for the technical assistant post .For scientist level you will need a MSc further or you can join through technical assistant and study further and get into the entry level scientist. For technical assistant exam the 4 sections are Basic English, General Knowledge, Arithmetic, Technical subject. The detailed syllabus is as follows,

General Knowledge

• Current events of National and International importance.
• Sports and Entertainment.
• Indian History (ancient, medieval, modern).
• Indian Geography, Economy, and Agriculture.
• Natural Resources, Planning, Sustainable and Inclusive Development.
• Natural Calamities and Disaster Management.
• Human Resource Development Index of India.
• Basic Knowledge of the Indian Constitution.
• Indian National Movement.
• Human Rights.
• Various aspects of Rural and Urban Development.
• General Science.
• Development and Environmental Problems.
• Biotechnology and Health Issues.
• Development of Science and Technology In India

Arithmetic

• Trigonometry.
• Partial Fractions.
• Complex Numbers.
• Analytical Geometry.
• Differential Equations.
• Integration and Its Applications.
• Differentiation and its Applications.

Technical subject- Chemistry

• Flammable liquids and gasses.
• LPG properties.
• Relation between.
• Pressure, volume, and temperature.
• Areas of triangle, rectangle, and parallelogram.
• Volumes of cylinders, cones, sphere, and cuboid.
• Properties of Water, CO2, O2, H2, Inert gasses.
• The basic concept in the use of electricity and its hazards

All the Best!