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Revision Notes

General Laboratory Equipment

Telangana Open School (TOSS) · Class 12 · Biology

Quick revision notes for General Laboratory Equipment — Telangana Open School (TOSS) Class 12 Biology. Key concepts, formulas, and definitions for last-minute revision.

52 questions30 flashcards5 concepts

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Key Topics to Revise

1

Incubator

  • An incubator is a temperature-controlled chamber used to maintain a constant temperature for various biological processes.
  • It has insulated walls, a heating unit, thermostat, and shelves for placing samples.
  • Used to keep paraffin wax molten (at 50–55°C), study enzyme activity at different temperatures, and dry insect specimens.
2

Autoclave

  • An autoclave is an electric device used to sterilize glassware, culture media, and instruments using high-pressure steam.
  • Works on the same principle as a pressure cooker.
  • Operates at about 121°C and 15 psi pressure for 15–20 minutes to kill all microbes, including spores.
3

Kymograph

  • A kymograph records physiological activities like muscle contractions and heartbeats.
  • Main parts: electric motor, rotating drum, muscle/heart mount, lever with pointer, and recording paper.
  • Muscle contraction pulls the lever down, creating a dip on the smoked paper wrapped around the drum.
4

Distillation Unit

  • Used to produce distilled water by removing salts and impurities through evaporation and condensation.
  • Main parts: distilling flask, Leibig’s condenser, adapter, and receiver (conical flask).
  • Steam from heated water condenses in the inner tube cooled by running water in the outer jacket.

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Full Notes

Key Concepts

An incubator is a temperatureAn autoclave is an electric deviceA kymograph records muscle contractionsThis unit purifies water by boilingA pH meter measures the acidity

Frequently Asked Questions

What are the important topics in General Laboratory Equipment for Telangana Open School (TOSS) Class 12 Biology?
General Laboratory Equipment covers several key topics that are frequently asked in Telangana Open School (TOSS) Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in General Laboratory Equipment — Telangana Open School (TOSS) Class 12 Biology?
Understand the core concepts first, then work through the 52 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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