Question Discussion & Solution

The correct answer is Another name for the coronavirus that created the epidemic in 2020.

Key Points

• The Ministry of AYUSH has launched the Jan Andolan Campaign on COVID-19.
• This Andolan is regarding “Public Health Response to COVID-19: Campaign for COVID-Appropriate Behaviour” which has been launched by the Prime Minister.
• The three key messages which are being highlighted across it are - “Wear Mask, Follow Physical Distancing, and Maintain Hand Hygiene.

Key Points

General attributes of a good language:

• Clarity, simplicity, and unity: provides both a framework for thinking about algorithms and a means of expressing those algorithms 
• Cost of use: program execution, program translation, program creation, and program maintenance Orthogonality: every combination of features is meaningful
• Naturalness for the application: program structure reflects the logical structure of the algorithm
• Support for abstraction: program data reflects problem being solved 
• Ease of program verification: verifying that the program correctly performs its required function
• Programming environment: external support for the language
• Portability of programs: transportability of the resulting programs from the computer on which they are developed to other computer systems

Hence the correct answer is Non-portability.

The correct answer is Violence.

Key Points

• Violence
  • It is defined by the World Health Organization in the WRVH as “the intentional use of physical force or power, threatened or actual, against oneself, another person, or against a group or community, that either results in or has a high likelihood of resulting in injury, death, psychological harm, maldevelopment or deprivation” 

Additional Information

• Nonviolence
  • It is the personal practice of not causing harm to one's self and others under every condition.
• Hatred
  • It is an angry or resentful emotional response to certain people or ideas. 

The correct answer is Calcium Carbonate.

Key Points

• The chief component of the nacre that constitutes the pearl is aragonite (CaCO₃).
• Nacre also contains a small amount of conchiolin, a hornlike organic substance (albuminoid) that is the main constituent of the mollusc's outer shell.
• Pearl also contains Magnesium Carbonate(MgCO₃) along with Calcium Carbonate.

Additional Information

• Calcium carbonate is a common substance found in rocks as the minerals calcite and aragonite and is the main component of eggshells, snail shells, seashells, and pearls. 
• The Molar Mass of Calcium Carbonate is 100.0869 g/mol.
• Melting point: 825 °C.

CONCEPT:

• Plane mirror: This mirror is straight without any inward or outward curve.
  • It forms a virtual image and upright image which is of size as same as the object.
  • The bathroom mirrors are an example.
• Concave mirror: The mirrors curved inside on the reflecting side are called concave mirrors.
  • These mirrors produce a real, inverted, and magnified image of the object.
  • These are used in reflecting telescopes, shaving mirrors, and ophthalmoscope.

• Convex mirror: It is an outward curved mirror that produces a diminished image.
  • Convex mirrors either diverge a parallel beam of light into all directions or gather light from all directions and produce a parallel beam out of it.

EXPLANATION:

• Following are the reasons as to why a convex mirror is used as a rearview mirror in the vehicle

• The image formed by the convex mirror is virtual and erect in contrast to that of the real but inverted image of the concave mirror.
• It gathers light from all directions and aligns it as a parallel beam so that it provides a wider view to the viewer. That's why the convex mirror is used as a rear-view mirror in vehicles. So option 2 is correct.