Question Discussion & Solution

The correct answer is Register, Cache, RAM, Hard disk.

• Register

• RAM 
  • RAM is a hardware element where the data being currently used is stored.
  • It is a volatile memory.
  • Two types of RAM are
    • Static RAM, or (SRAM) and
    • Dynamic RAM, or (DRAM).
• Register
  • A register holds instructions or data that the processor is working on or will be working on shortly.
  • They form part of the processor and are capable of holding only one item at a time.
• Cache 
  • Cache memory is an area in the computer where codes and instructions are stored.
• Hard disk
  • A hard disk drive is an electromechanical data storage device that stores and retrieves digital data using magnetic storage.

• There are four major storage levels on the computer:
  • Internal –
    • Processor registers and cache.
  • Main –
    • The system RAM and controller cards.
  • On-line mass storage –
    • Secondary storage.
  • Off-line bulk storage –
    • Tertiary and Off-line storage.

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.

'Loyalty', 'Allegiance', and 'Commitment' are synonyms.

Whereas, 'Infidelity' is an antonym of 'Loyalty'.

Hence, the correct answer is 'Infidelity'.

The correct answer is Jaipur.

• Jaipur is known as the Panna City of Rajasthan.

Key Points 

• Emerald (Panna) is a gemstone.
  • It is a variety of beryl minerals.
  • It is also called Green Fire.
  • It is found in the following areas of Rajasthan-
    • Udaipur- Kalaguman, Gogunda, Tikki
    • Ajmer-  Rajgarh, Gudas, Bubani
      • Ajmer's Bubani to Rajsamand's Gamguda and Nathdwara area is known as Green Fire Belt, where the emerald is found.

Additional Information

• Panna Mandi Is also situated in Jaipur.

Concepts:

Physical Properties of Metals and Non-metals

Explanation:

• Iodine is lustrous. This is an exception to the physical properties of non - metals. Iodine is non-metal and non - metals have dull appearance. 
• Sodium is metal. Metals are usually hard so this is also an exception. 
• Graphite conducts electricity. This is an exception as graphite is a form of carbon and it is non - metal. 
• Copper being metal is not an exception as it is metals and metals are good conductors of heat. 

So the correct option is 'Copper is a good conductor of heat.'