Viva MCQs Quiz | Class 10

Understanding Practical Exam Schemes in Home Science

The Home Science practical examination is a crucial part of your assessment, testing your hands-on skills and theoretical knowledge related to practical applications. The viva-voce segment, often carrying 2-mark questions, aims to assess your understanding of procedures, safety protocols, rationale behind steps, and correct usage of equipment. Mastering these foundational concepts is key to scoring well.

Key Points for Practical Exam Success:

• Preparation is Key: Thoroughly read and understand the practical manual before the exam. Know the objectives, materials, and steps for each experiment.
• Safety First: Always prioritize safety. Be aware of lab rules, proper handling of equipment, chemicals, and food items.
• Hygiene Practices: Maintain impeccable personal and lab hygiene, especially in food and nutrition practicals.
• Equipment Knowledge: Understand the names, functions, and proper handling of all apparatus and tools.
• Why Behind the What: Don’t just memorize steps; understand why each step is performed and its significance. This is vital for viva questions.
• Accurate Measurements: Practice precise measurements for ingredients and solutions.
• Waste Management: Know the correct procedures for waste segregation and disposal.

Important Areas Covered (2 Marks Focus):

• Safety Precautions: Basic safety rules (e.g., tying hair, wearing apron, handling hot objects, chemical spills).
• Equipment Usage: Identification and correct use of common lab equipment (e.g., measuring cylinder, beaker tongs, weighing scale).
• Hygiene & Sanitation: Personal hygiene, food handling practices, cleanliness of workspace and equipment.
• Basic Techniques: Fundamental skills like sterilization, measurement, labeling, waste disposal, blanching (food preservation context).
• Purpose of Steps: Understanding the rationale behind specific steps in an experiment (e.g., why blanching is done, why samples are labeled).

Quick Revision Checklist:

• Sterilization methods and their importance.
• Common laboratory apparatus and their functions.
• Correct posture and handling techniques for various tasks.
• Food safety principles (cross-contamination, temperature control).
• First aid basics for common lab accidents.
• Importance of documentation and observation.

Practice Questions (for further self-assessment):

1. Which gas is typically used for sterilization by heat in certain laboratory setups?
   
   • A) Oxygen
   • B) Nitrogen
   • C) Steam (Correct)
   • D) Carbon dioxide
2. What is the primary function of a weighing balance in a Home Science lab?
   
   • A) To measure liquid volume
   • B) To determine temperature
   • C) To measure mass or weight of substances (Correct)
   • D) To stir solutions
3. Why should one avoid direct contact of hands with sterile equipment after sterilization?
   
   • A) It can damage the equipment.
   • B) It can transfer microbes and contaminate it. (Correct)
   • C) It makes the equipment slippery.
   • D) It causes the equipment to rust.
4. Which of the following describes cross-contamination in food preparation?
   
   • A) Cooking different foods together in one pot.
   • B) Transfer of harmful bacteria from raw food to cooked food or fresh produce. (Correct)
   • C) Mixing different spices in a dish.
   • D) Storing all food items in the same container.
5. What is the purpose of a fire extinguisher in a Home Science laboratory?
   
   • A) To clean the workbench.
   • B) To put out small fires. (Correct)
   • C) To measure water volume.
   • D) To store chemicals.