Question Discussion & Solution

The correct answer is Jaisalmer and Bikaner.

Key Points
Tropical Thorn Forest:

• These forests are found in Jaisalmer, Bikaner and Barmer.
• It comprises 6.25% of the forest in Rajasthan. 
• Rainfall varies from 0 to 25 cm. It is scanty in nature.
• Xerophytic vegetation is found in this forest. 
• Khejri, Rohida, and Jaal are prominent trees present in the Forest.

Additional Information

The correct answer is Magnesium Sulfate.

• Magnesium Sulfate is the industrial name of Epsom.
• Magnesium sulfate is a magnesium salt having sulfate as the counterion.
• It has a role as an anticonvulsant, a cardiovascular drug, a calcium channel blocker, an anaesthetic, a tocolytic agent, an anti-arrhythmia drug, an analgesic, and a fertilizer. It is a magnesium salt and a metal sulfate.

Key Points

• Magnesium Sulfate Formula Structure:  

Additional Information

The correct answer is the 15th Bengal Native Infantry.

• The battalion that rebelled at Nasirabad in 1857 was the 15th Bengal Native Infantry.
  • The first rebellion in Rajasthan took place on 28 May 1857 at Naseerabad
  • News of Meerut Rebellion AGG (Agent to Governor-General) George Patrick Lawrence and he sent the 15th Bengal Native Infantry based at Ajmer to Nasirabad, causing discontent among the soldiers.
  • Soon the news of the revolt of the soldiers reached the soldiers in Nasirabad as well and on 28 May 1857, the soldiers of the Native Infantry revolted in Nasirabad.
  • The soldiers of the 30th Native Infantry also joined in and after burning and capturing the soldiers of the cantonment left for Delhi.

Additional Information

6 British Cantonments in Rajasthan are: 

The correct answer is Concave.

Key Points

• Concave Mirror:-
  • If a hollow sphere is cut into parts and the outer surface of the cut part is painted, then it becomes a mirror with its inner surface as the reflecting surface.
  • This type of mirror is known as a concave mirror.
  • A concave mirror has a reflective surface that is curved inward and away from the light source.
  • Concave mirrors reflect light inward to one focal point.
  • Unlike convex mirrors, the image formed by a concave mirror shows different image types depending on the distance between the object and the mirror.
  • Torch lights, automobile headlights are examples of concave mirrors.
  • The mirror used by the dentists to see the teeth of the patients is also a Concave Mirror.
  • Uses of Concave Mirror:
  • Used in shaving mirrors, ophthalmoscope, astronomical telescopes, headlights, solar furnaces.

Additional Information

• Convex Mirror:-
  • If the cut part of the hollow sphere is painted from inside, then its outer surface becomes the reflecting surface.
  • This kind of mirror is known as a convex mirror.
  • A convex mirror is also known as a diverging mirror as this mirror diverges light when they strike its reflecting surface.
  • Virtual, erect, and diminished images are always formed with convex mirrors, irrespective of the distance between the object and the mirror.
  • A convex mirror is a diverging mirror in which the reflective surface bulges towards the light source.
  • They are not used to focus light as they reflect light outwards.
  • The image formed by convex mirrors is smaller than the object but gets larger as they approach the mirror.
  • Magnifying glasses, telescopes are examples of convex mirrors.
  • Uses of Convex Mirror: Inside buildings, Vehicle mirrors, Magnifying glass, Security purposes.
• Plane Mirror:-
  • A plane mirror is a flat, smooth reflective surface.
  • A plane mirror always forms a virtual image that is upright, and of the same shape and size as the object, it is reflecting.
  • A spherical mirror is a mirror that has a consistent curve and a constant radius of curvature.
  • The images formed by a spherical mirror can either be real or virtual.
  • Spherical mirrors are of two types:
    • Concave Mirror
    • Convex Mirror
  • Uses of Plane Mirror: Solar cookers, looking glass, scientific instruments, constructing periscope which is used in submarines, kaleidoscope, a toy which produces beautiful patterns, SLR camera to click photos.

Concept:

ER model describes data as entities, relationships, and attributes. It is a high-level conceptual data model. This model is used to define the data elements and relationships for a specified system.

Entity:

The entity is a thing in the real world with an independent existence. An entity may be an object with physical existence. For example particular person, car or it may be an object with a conceptual existence For example company, job, etc.

Attributes:

Each entity has attributes – the particular properties that describe it.

Relationship:

It is used to describe the relation between two entities.

Explanation:

E-R Diagram is design level task and Relational model is implementation.

The relational model is implemented from E-R Diagram and in this, it gets rid of the multivalued attributes.

Relations produced from the E - R Model will always be in 1NF, that is, Simple atomic values with non-multivalued attributes.

NOTES: