Question Discussion & Solution

Bahlul Lodhi was the founder of the Lodhi Dynasty in 1451. By the end of the 15th-century Bahlul Lodi firmly established the Lodi dynasty at Delhi. He succeeded in bringing a large area of North India under his control. After his death, his son Sikandar Lodi succeeded him to the throne.

• In the sixteenth century the Lodi Empire, under Sultan Sikandar Lodi, in North India reached its zenith.
• The annexation of Dholpur paved the way for the expansion of Afghan rule in the regions of Rajputana and Malwa. The forts of Narwar and Chanderi were annexed while the Khanzada of Nagaur acknowledged the suzerainty of the Lodi Sultan in 1510-11.
• In short, the whole of North India, from Punjab in the northwest to Saran and Champaran in north Bihar in the east, and Chanderi to the south of Delhi were brought under the Lodi rule.
• Unlike his father, Sultan Ibrahim Lodi had to face the hostility of the 108 Political Structures Afghan nobility soon after his accession to the throne in 1517.
• He found himself surrounded by powerful nobles bent upon weakening the center to gain an upper hand for themselves. His father had to fight against his brothers and relatives and was supported by the nobles who wanted to replace the princes in the resourceful provinces. Upon the death of Sultan Sikandar Lodhi, the nobles decided to divide the Empire between Sultan Ibrahim Lodi and his younger brother Prince Jalal Khan Lodi, the governor of Kalpi.

Hint

The rulers of Delhi:

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 Barium.

Key Points

• Metal salts commonly used in firework displays include calcium chloride, sodium nitrate, barium chloride, copper chloride, etc.
• The green flame produced in fireworks is due to the presence of Barium.
• The blue flame is due to the presence of Copper.
• The orange flame is due to the presence of Calcium.
• A yellow flame is due to the presence of Sodium.
• Lithium is used to impart a red colour to fireworks.

Additional Information

• Barium (Ba):
  • The atomic number is 56.
  • It is mostly used in drilling fluids for oil and gas wells and also used in paints and glassmaking.
  • It is found in combination with other elements.
  • Barite is one of the major ores of Barium.
• Calcium (Ca):
  • The atomic number is 20.
  • Calcium provides strength to bones and teeth along with vitamins.
  • It also plays an important role in blood formation, muscle contraction, clotting of blood, etc.
  • Milk, eggs, fish, etc. are the main sources of calcium.
• Lithium (Li):
  • Atomic Number is 3.
  • Lithium is the lightest metal on the periodic table.
  • It is widely used in rechargeable batteries for mobile phones, laptops, digital cameras, etc.
• Chromium (Cr):
  • The atomic number is 24.
  • It is used in manufacturing stainless steel.
  • Chromite is the major ore of Chromium.
  • It is a blue-white hard, brittle, and very corrosion-resistant metal and is used to produce several alloys.

Least possible diagram is:

I. Some car are Maruti. → True

II. No Ciaz is a Maruti. → False

The correct answer is Concave.

• Myopia: A person suffering from myopia can see the near objects clearly while far objects are not clear.
  • A Concave lens (diverging lens) is used by people suffering from myopia.

Additional Information

• Hypermetropia: A person suffering from hypermetropia can see distant objects clearly but not near objects.
  • People suffering from hypermetropia uses a Convex lens.
• Astigmatism: This defect arises due to the difference in the radius of curvature of the cornea in the different planes
  • The cylindrical lens is used by people suffering from Astigmatism.