Physics Chemistry & Biology Test 2
To detect fake notes, we use
  • UV rays
  • IR rays
Explanation:

To detect fake notes, we use UV rays (ultraviolet rays). Many currencies have features that are only visible under UV light, such as watermarks and security threads, which help in identifying counterfeit bills.

Which lens used to see minute particles of ears,nose and throat( ENT Doctor)
  • Convex lens
  • Microscope lens
  • Concave lens
Explanation:

ENT doctors use microscope lenses to see minute particles in the ears, nose, and throat. Microscopes provide the necessary magnification and clarity to examine small structures in these areas effectively.

While convex lenses can be used for magnification, the specialized equipment for ENT examinations typically involves microscopes.

To preserve food for long duration, __________ is used
  • Sodium Chloride
  • Sodium Benzoate
  • Sodium Dizoate
Explanation:

To preserve food for a long duration, Sodium Benzoate is widely used as a food preservative. It prevents the growth of bacteria, yeast, and molds in acidic foods and beverages, extending shelf life. While Sodium Chloride (salt) is also used, Sodium Benzoate is more effective in various applications.

Herbs, Trees and Shrubs are the one of the following?
  • Names of plants
  • Scientific Names
  • Categories of plants
  • None
Explanation:

Herbs, trees, and shrubs are categories of plants distinguished by their physical characteristics. Herbs are typically non-woody and often used for culinary or medicinal purposes.

Trees have a single, woody trunk and can grow tall, while shrubs are shorter, woody plants with multiple stems, commonly used in landscaping and gardens.

Plants which takes support and grow upwards are called as?
  • Creepers
  • Buds
  • Shrubs
  • Climbers
Explanation:

Climbers are plants that need support to grow vertically. They use structures like trellises, fences, or other plants to climb and access sunlight.

Common examples include vines such as ivy and morning glory. This growth habit allows them to thrive in various environments, maximizing their exposure to light and air.

Plants with weak stems that cannot grow upright but can spread on the ground are called?
  • Climbers
  • Creepers
  • Buds
  • None
Explanation:

Creepers have weak stems that cannot support themselves, so they spread along the ground. Examples include plants like groundcovers and certain types of strawberries.

Plants with green and tender stems are called as?
  • Herbs
  • Shrubs
  • Explanation:

    Herbs are plants with green, tender stems that are non-woody. They are commonly used in cooking, medicine, and aromatherapy, and often include varieties like basil, parsley, and mint.