Question Discussion & Solution

The correct answer is ​0 to 14.

Important Points

• The pH scale is the scale used to express the acidity or alkalinity of a substance based on the concentration of hydrogen ions in its solution.
  • pH scale was discovered by Soren Sorensen.
  • The range of pH scale 0 to 14.
    • If pH < 7 then solution is acidic.
    • If pH > 7 then solution is basic.
    • If pH = 7 then solution is neutral.

Additional Information

• pH means the potential of Hydrogen.
• The strength of acids and bases depends on the number of H⁺ ions and OH^- ions produced, respectively.
• The human body works within the pH range of 7.0 to 7.8.
• When the pH of rainwater is less than 5.6, it is called acid rain.
• Tooth decay starts when the pH of the mouth is lower than 5.5.

Concept:-

 Single linked list:

This list consists of a number of nodes in which each node has a next pointer to the following element. The link of the last node in the list is NULL, which indicates the end of the list.

Calculation:-

After perform ((Start → Next) → Next) the current link transfer to the third node of linked. And Third node data value is 128.

Hence the correct answer is 128.

Concept-

• We know that all living organisms need food.
• Food supplies proteins, carbohydrates, fats, vitamins, and minerals, all of which we require for body development, growth, and health.
• Both plants and animals are major sources of food for us.
• We obtain most of this food from agriculture and animal husbandry.
• Cereals such as wheat, rice, maize, millets, and sorghum provide us carbohydrates for energy requirements.

Explanation-

The principal food crop of the world is wheat.

• Wheat is a Rabi crop that belongs to the Gramineae family.
• The scientific name of rice is Triticum aestivum.
• Wheat is the principal crop for millions of people in the world.
• Wheat grain is used for cooking.
• So, it is the principal cereal crop compared to rice, maize, and barley. 

Additional Information

• The major food crop of the world that belongs to the family is Gramineae. 
• Gramineae is also known as the Poaceae is the family that contains all the major crops that belong to the grass family.
• Poaceae or Gramineae is the most economically important plant family, providing staple foods from domesticated cereal crops as well as feed for meat-producing animals. 
• Examples such as maize, wheat, rice, barley, and millets, etc.

A drone is a male honey bee. Similarly, A male deer is called stag.

Option(2) is correct.

Argument I: Yes, banning will reduce misuse: No, definitely not, banning mobile phones is not a solution as the Mobile phone is used for several purposes, for study, for payment, and more, So the argument I is not strong.

Argument II: No, it will have only a very limited impact: Moblie phone has several benefits, Online classes, useful videos, internet banking, etc. it is the very useful and very low impact of missuse.So, argument II is strong.

Hence, the correct answer is an option(2)i.e., Argument II is strong.