• The blue litmus paper will turn red when it comes into contact with an acidic solution.
• When a litmus paper is put in a solution, depending on what the solution is, the indicator will react with the solution and will change its colour.
• On the other hand, red litmus paper reacts to alkaline substances by turning blue.
• Note: Acid will turn red litmus paper to red only.No change.

The correct answer is A bit.

Key Points

• The smallest memory unit is known as a bit.
• The term "bit" refers to a binary digit.
• A logical state with one of two potential values is represented by a bit.
• The most common representations for these values are "1" and "0."
• The bit is also known as a Shannon, after Claude E. Shannon, as a unit of information.

Additional Information

• A computer's memory is commonly measured in bytes.
• A computer's memory is similar to that of the human brain.
• It's where you keep your data and instructions.
• 1024 bytes equals one kilobyte.
• A nibble is a half-byte of data.
• A hard disk's storage capacity is measured in Megabytes, Gigabytes, and Terabytes.

Distance between starting and ending point = (AE)² + (EF)²

⇒ 10² + 10²

⇒ 100 + 100

⇒ 200

⇒ 10√2

Hence, the correct answer is 10√2m.

In many ways, ICT has become a part of children's everyday lives, even in preschools. The computer has now become a common tool for the education of preschool children because when used appropriately, it can reinforce their learning experiences.

• Teachers of preschools have to sing, perform various actions, recite rhymes, communicate with children in various ways, and teach them to carry out all these activities. ICT may assist these activities.
• Teachers may narrate stories or let children hear a recorded story or watch a video.
• Recorded songs, rhymes, stories, dances, plays can assist learning.
• For instance, an audio player may be used for playing recorded songs and rhymes and children may learn from these sources as well.
• With the help of computers, children may watch colorful pictures, listen to talking storybooks, thus learn to read it and enjoy the story.
• There is much software that supports language development, support the development of the concept of numbers, help in reading, enhance phonological awareness and sharpen listening skills, provide scope for activity-based learning as children draw, match, sort, count, explore virtual spaces and relate to shapes, sounds, animals, plants and their habitats, and the like.
• Children can practice art and craft activities as they watch videos.

Hence, we can conclude that all of the above illustrations are correct.

The correct answer is All of the Above.

 Key Points

• Decision making structures require that the programmer specifies one or more conditions to be evaluated or tested by the program.
• It also involves a statement or statements to be executed if the condition is determined to be true, and optionally, other statements to be executed if the condition is determined to be false.
• C programming language provides the following types of decision-making statements.
• if...else statement
  • An if statement can be followed by an optional else statement, which executes when the Boolean expression is false.
• switch statement
  • A switch statement allows a variable to be tested for equality against a list of values.
• C goto
  • The goto statement in C/C++ also referred to as the unconditional jump statement can be used to jump from one point to another within a function.

 Additional Information

• C break:
  • This loop control statement is used to terminate the loop.
  • As soon as the break statement is encountered from within a loop, the loop iterations stop there, and control returns from the loop immediately to the first statement after the loop.

The correct option is Most of the bees in the hive are worker bees.

• Every honey bee colony comprises a single queen, a few hundred drones and several thousand worker castes of honey bees.
• A queen bee is the only female bee in the hive that gets to reproduce.
• Worker bees are all female and are all offspring of the queen. 
• Queen is a fertile, functional female, the worker is a sterile female and the drone is a male insect.
• Queen and worker develop from the fertilized egg while drone develops from an unfertilized egg.
• Further differentiation of queen and worker depends on the quality and quantity of food that is fed to the queen or worker larvae.

Explanation:

​Every beehive has one male bee and many female bees → Inorrect.

Most of the bees in the hive are worker bees → Correct

The study of honey bee is sericulture → Inorrect.

Beehives are octagonal in shapes→ Incorrect. (Hexagonal)

​Additional Information

The queen:

• ​There is only one queen in a colony and considerably larger than the members of other castes.
• Swarming is the natural method that honeybee colonies use for multiplying their colonies.
• The old queen is killed as soon as the new queen is fertilized.
• The phenomenon of raising a queen in the off-season is called supersedure.
• The normal lifespan of a queen is 3 years.

​The drone:

• ​The drones are male bees with no sting.
• They are much larger and stouter than either the queen or the workers.
• Their only function is to impregnate the young queen a task which they are unable to perform until they are about 10 days of age.
• They also help in the maintenance of hive temperature. 
• The drones are produced by unfertilized eggs of the queen, or by those workers which take up the reproductive function due to the absence of a queen in a colony.
• The normal lifespan of a drone is 57 days. 

​The worker:

• ​Smallest inhabitants of the beehive.
• They are imperfect females incapable of laying eggs.
• Worker bees primary duties are cleaning, feeding developing larva once hypopharyngeal glands develop, ripening of honey, secreting/moulding of wax into combs.
• The lifespan of a worker is about 4 weeks during the active season and 8 to 10 weeks during the less active season.
• On certain occasions when the colony is in need of a queen, some of the workers start laying eggs from which only drones are produced.
• These workers called laying workers.