Question Discussion & Solution

The diagram that best represents the relationship among Sun, Moon and Universe:

Both the Sun and Moon belong to the universe.

Hence, ‘option 2’ is the correct answer.

The correct answer is Liver. 

Key Points

• The liver is the largest gland in the human body.
  • It is made up of specialized cells called hepatocytes.
  • It is situated on the right side of the stomach in the human body.
  • The study of the liver is called hepatology.
  • It is the largest metabolic organ in the human body.
  • It is the organ that stores a large amount of vitamin A.
  • Ammonia and urea are produced in the liver.
  • Hepatitis is a viral disease that affects the liver.
  • The liver is known as the "chemical lab of the human body".
  • The liver is the highest temperature-producing organ.

Additional Information

• The brain is the center of coordination in the human body.
• The pancreas secretes enzymes and hormones.
  • Insulin and glucagon are the hormones secreted by Pancreas.
• The thyroid gland is the largest endocrine gland in the human body.
  • Thyroxin and calcitonin are the hormones secreted by the thyroid gland.
• Pituitary Gland
  • The pituitary gland is a gland that is located at the base of the brain and right behind the bridge of the nose. It is mainly responsible for sexual maturation, reproduction, etc.
  • The pituitary gland is also called the 'master endocrine gland' and it is a small pea-sized gland.
  • The pituitary gland is controlled by Hypothalamus. 
  • The hypothalamus sends signals to the pituitary to release or inhibit pituitary hormone production.
  • The pituitary is called the master gland because it controls various other glands.
  • Hence, it could be concluded that the pituitary gland is also called the 'master endocrine gland' because it regulates the activities of other endocrine glands.

The correct answer is Bullets.

Key Points

• When data is in list format Bullets can be used to represent it neatly in MS Word.
• Microsoft products allow you to organize content using bulleted and numbered lists.
  • You can also create customized lists by editing the bullet/number font, color, alignment, and icon style. 
• Within your Microsoft document, place your cursor or highlight the text where you wish to insert a bulleted list. 
• Under the [Home] tab in the “Paragraph” section, click the [Bullets] drop-down menu. 
• Choose a bullet style or select "Bullets and Numbering” to create a customized bullet style.
• To change the alignment of the bulleted list, from the "Paragraph" section, click the [Aligh Text] drop-down menu.
• 

Additional Information

• Change Case
  • You can also capitalize a character you are typing by pressing and holding the SHIFT key while you type.
  • You can also press the CAPS LOCK to have every letter that you type capitalized, and then press the CAPS LOCK again to turn off capitalization.
  • 
• Spacing between Lines
  • Following are the simple steps to adjust the spacing between two lines of the document.
  • Step 1
    • Select the paragraph or paragraphs for which you want to define the spacing.
    • You can use any of the text selection methods to select the paragraph(s).
  • Step 2
    • Click the Line and Paragraph Spacing Button triangle to display a list of options to adjust the space between the lines.
    • You can select any of the options available by simply clicking over them.
  • 

Given,

Given Expression: 70S7P21R2Q15

According to question :

=70 ÷ 7 + 21 × 2 – 15

Using BODMAS rule,

=10 + 21 × 2 – 15

= 10 + 42 – 15

= 52 – 15

= 37

Hence, value of the given expression is ‘37’.

The correct answer is Al2O3.

Key Points

•  Al2O3  reacts with acids and bases.
  • Aluminum oxide (Al2O3) is an amphoteric substance.
  • The amphoteric substance is a substance that can react with both acids and bases usually to produce salt and water.
  • Aluminium oxide therefore can react with both acids as well as bases. We will take the example of its reaction with hydrochloric acid (strong acid) and sodium hydroxide (strong base).
  • When mixed with these two compounds aluminium oxide either acts like  acid with a base and a base with an acid.

Additional Information

• Al₂O₃ + 6 HCl → 2 AlCl₃ + 3 H₂O (acts like a base)
• Al2O3 + 2 NaOH + 3 H₂O → 2 NaAl(OH)₄ (sodium aluminate) (acts like an acid)
• On reacting Al2O3 with HCl, we get Aluminium Chloride as the salt and water as a by-product.
  • Likewise, the reaction between NaOH ( Strong Base) and Al₂O₃ results in the formation of Sodium Aluminate as salt and water.