Question Discussion & Solution

The correct answer is citric.

• Orange juice contains citric acid due to which tastes sour.

Key Points

• Fruits that contain citric acid are called citrus fruits.
• Citrus fruits are lemon, lime, orange, Grapefruit, etc.
• The formula of citric acid is C₆H₈O₇.

Additional Information

• Oxalic acid is found in tomato.
  • Its formula is C₂H₂O₄.
• Formic acid is found in the sting of ants and bees.
  • Its formula is CH₂O₂.
• Acetic acid is found in vinegar.
  • Its formula is id CH₃COOH.

The relation is:

1) Sports : Ground → Sports are organised in ground.

2) Rubber : Eraser → Rubber is used to erase writings on paper.

3) Cinema : Screen → Cinema is shown on screen

4) Drama : Stage → Drama is played on stage.

Hence, Rubber : Eraser is the correct answer.

• The Juvenile Justice Act of 2015 is an amendment to the Juvenile Justice Act, 2002.
• It provides for the trial of children in the age group 16-18 years as adults under circumstances involving heinous crimes.
• The act has defined a child as someone who is below the age of 18.
• Minimum Punishment - Seven years.
• However, the act doesn't make it mandatory to try all children in the age group of 16-18 years as adults.

The correct answer is Ammeter.

Key Points

• Ammeter
  • An ammeter is an instrument that is used to measure the current in the circuit.
  • It measures either direct or alternating electric current, in amperes (A).
  • It has a set of coils with very low resistance and inductive reactance.
  • This allows for very low impedance, the force that opposes electric current.

Additional Information

• Wattmeter
  • The wattmeter is an instrument for measuring the electric active power in watts of any given circuit.
  • Electromagnetic wattmeters are used for the measurement of utility frequency and audio frequency power; other types are required for radio frequency measurements.
• Hygrometer
  • Hygrometer instrument used in meteorological science to measure the humidity or amount of water vapour in the air.
• Pyrometer
  • A pyrometer is a type of remote-sensing thermometer used to measure the temperature of distant objects

Key Points 

• The biosphere reserves are the areas meant for the conservation of biodiversity.
• These are large areas of protected land for the conservation of wildlife, plant and animal resources and traditional life of the tribals living in the area.
• The biosphere reserves help to maintain the biodiversity and culture of that area.
• A biosphere reserve may also contain other protected areas.
• The Pachmarhi Biosphere Reserve consists of one national park named Satpura and two wildlife sanctuaries named Bori and Pachmarhi

Additional Information

• There are18 biosphere reserves in India:-
  • Cold Desert, Himachal Pradesh
  • Nanda Devi, Uttrakhand
  • Khangchendzonga, Sikkim
  • Dehang-Debang, Arunachal Pradesh
  • Manas, Assam
  • Dibru-Saikhowa, Assam
  • Nokrek, Meghalaya
  • Panna, Madhya Pradesh
  • Pachmarhi, Madhya Pradesh
  • Achanakmar-Amarkantak, Madhya Pradesh-Chhattisgarh
  • Kachchh, Gujarat
  • Similipal, Odisha
  • Sundarban, West Bengal
  • Seshachalam, Andhra Pradesh
  • Agasthyamala, Karnataka-Tamil Nadu-Kerala
  • Nilgiri, Tamil Nadu-Kerala 
  • Gulf of Mannar, Tamil Nadu
  • Great Nicobar, Andaman & Nicobar Island