Question Discussion & Solution

When the box will be constructed, the following symbols will be opposite to each other as shown below:

So, when the box will be constructed, the symbols O and K will be opposite to each other.

Hence, option 3) O and K is the correct answer.

Eagle, Bird, Crocodile

All Eagle is the Bird and Crocodile is the reptile. 

So,  Venn diagram given bellow-

Hence, option 4 is the correct answer.

The correct answer is about 70% water.

Important Points

• The Top Four Elements Found in the Human Body: oxygen (65%), carbon (18.5%), hydrogen (9.5%), nitrogen (3.2%).
• The other trace elements (less than 0.01%) are boron (B), cadmium (Cd), chromium (Cr), cobalt (Co), copper (Cu), fluorine (F), iodine (I), iron (Fe), manganese (Mn), molybdenum (Mo), selenium (Se), silicon (Si), tin (Sn), vanadium (V), and zinc (Zn).
• The six major nutrients are carbohydrates (CHO), lipids (fats), proteins, vitamins, minerals, water.
• The functions of water in the human body:
  • Water carries nutrients and oxygen to all cells in the body.
  • Water is required for breathing.
  • Water regulates your body temperature.
  • Water protects and cushions vital organs.
  • Water cushions joints.
  • Water removes waste.

Key Points

• Calcium (Ca) is the most abundant mineral in the body and is essential for a number of vital functions.
  • Also helps muscles relax and contract, important in nerve functioning, blood clotting, blood pressure regulation, immune system health.
• Iron (Fe), Part of a molecule (haemoglobin) found in red blood cells that carries oxygen in the body, needed for energy metabolism.
• Iodine found in thyroid hormone, which helps regulate growth, development, and metabolism.
• Chromium works closely with insulin to regulate blood sugar (glucose) levels.

The correct answer is Gold.

Key Points

• Gold is the most malleable metal as it can be hammered to a thickness of 0.0025 mm.
• 1 gram of gold can be beaten into a sheet that spreads across an area of 1 m².
• Malleability, as a physical property of metals, is used to describe a given metal’s reaction to compressive forces.
• A metal with low malleability, like tungsten, will shatter when exposed to compression.
• A metal with high malleability, like lead, will deform when compressed.

The pattern followed here is: