Question Discussion & Solution

Here the pattern is,

0.15552 ÷ 0.3 = 0.5184,

0.5184 ÷ 0.3 = 1.728,

1.728 ÷ 0.3 = 5.76,

Similarly, we have :

5.76 ÷ 0.3 = 19.2

The correct answer is Desktop.

• The first screen which appears when windows are loaded is called Desktop.

Key Points 

• Desktop
  • The first screen which appears when windows are loaded is called Desktop.
  • As soon as we open the computer we come across the Windows welcome screen which displays many small pictures on the screen of the monitor.
    • This screen is known as the desktop.
  • The small pictures on the screen are known as icons.

Additional Information

• File Folder
  • ​A file is the common storage unit in a computer, and all programs and data are "written" into a file and "read" from a file.
  • A folder holds one or more files, and a folder can be empty until it is filled. 
• Recycling Bin
  • ​A recycling bin (or recycle bin) is a container used to hold recyclables before they are taken to recycling centers. 
  • Recycling bins exist in various sizes for use inside and outside homes, offices, and large public facilities.
• Recently Added Screen
  • ​A typical “Recently Added” section looks like at the top of the Start menu app list.
  • It's a small area that shows the names and icons of recently installed apps.

A cage is meant to keep something surrounded, so enclosure is the essential element. A prisoner (choice b) or an animal (choice c) are two things that may be kept in cages, among many other things. A zoo (choice d) is only one place that has cages.

The correct answer is Plaster of Paris.

Key Points

• Plaster of Paris is the generic name of calcium sulphate hemihydrate-CaSO₄. 1/2H₂O.
  • Plaster of Paris is manufactured by heating gypsum at 423K or 150^o C/300^o F.
  • On heating gypsum at 423 K, it loses water molecules and becomes calcium sulfate hemihydrate. This product is known as the plaster of Paris.

Important Points

• Application of Plaster of Paris-
  • It is used as a building material as a protective coating on walls and ceilings.
  • It is used as a moulding and vesting agent for decorative elements.
  • It is also used for aesthetic touch to the construction elements.
  • It is also field as plaster in orthopedics and as a filling material by dentists, etc.

Additional Information

• Baking soda is also known as sodium bicarbonate or bicarbonate of soda.
• Vinegar is also known as acetic acid. It typically contains 5–8% acetic acid by volume.
• Washing soda is a chemical compound with the formula Na₂CO₃, also known as sodium carbonate.

The Correct Answer is Option (2) i.e Pancreas.

Key Points

• In humans, the kidney is one of the main organs of the excretory system.
• The kidney's function is the filtration of the blood and removing waste(toxic) products.
• Waste products and excess fluid are removed through the urine.
• If the kidney fails person needs to undergo dialysis.
• Dialysis is a treatment that filters and purifies the blood using a machine
• The human excretory system includes certain organs that eliminate the wastes such as salts, carbon dioxide, urea, uric acid and water produced by the body.
• The path of the urine in the human excretory system is -
• After filtering from the kidney → The urine through Ureter → Stored in the Urinary bladder → Exits through the urethra.

Important Points

• The Pancreas is an organ located in the abdomen. It is not a part of the human excretory system.
• The Pancreas plays an important role in converting the food we eat into fuel for the body's cell.
• It helps in the process of digestion. It also regulates blood sugar.
• The body system that removes metabolic wastes from the body is known as the 'Excretory System'.