Bihar STET Paper 1 Science Mock Test - 2 - Bihar PGT/TGT/PRT MCQ

Ferrous sulphate →FeSO₄⋅7H₂O

Copper sulphate →CuSO₄⋅5H₂O

Magnesium sulphate →MgSO₄⋅7H₂O

Sodium chloride →NaCl

In a Dobereiner's traid, the atomic mass of the middle element is roughly the average of the atomic mass of the other  2 elements. Thus,  
Atomic mass of Q = (at. mass of P+ at. mass of R) /2
⇒ 23 = 7+ m(R) /2 
⇒ 23*2 = 7+ m(R) 
⇒  46 -7 = m(R) 
⇒ atomic mass of R = 39 

A: He considered each character separately:

• Mendel carefully selected specific traits to study, such as seed color, flower color, and plant height.


• He conducted experiments with true-breeding plants, which means they consistently produced offspring with the same traits as the parents.


• By studying each trait separately, Mendel was able to observe clear patterns of inheritance.

B: He was lucky not to encounter linkage problem:

• At the time of Mendel's experiments, he focused on traits that were not genetically linked.


• Genetic linkage refers to the tendency of certain genes to be inherited together because they are located close to each other on the same chromosome.


• Mendel's choice of traits helped him avoid the complications of genetic linkage, allowing him to identify and understand the basic principles of inheritance.

C: The plant was pure breeding:

• Mendel worked with plants that were true-breeding, meaning they consistently produced offspring with the same traits as the parents.


• This allowed Mendel to establish a clear pattern of inheritance by observing the traits passed down from one generation to the next.


• The use of pure-breeding plants helped Mendel eliminate the influence of other factors, making it easier to identify and understand the principles of inheritance.

D: All the above:

• All of the above factors contributed to Mendel's success in discovering the principles of inheritance.


• Considering each character separately, avoiding genetic linkage problems, and working with pure-breeding plants allowed Mendel to make significant observations and formulate his laws of inheritance.

In conclusion, Mendel's success in discovering the principles of inheritance can be attributed to his systematic approach, the traits he chose to study, the absence of genetic linkage, and the use of pure-breeding plants. These factors allowed him to make accurate observations, establish patterns of inheritance, and formulate the fundamental laws of genetics.

Urine is stored in the urinary bladder until it is released through the urethra.

When shooting sports the frame rate needs to be much higher than 24. frames per second remember that to slow down footage. it's explosions or cellular division filming for science usually means shooting at a higher framerate more. frames researchers can better study their subject.

In gases, the atoms are much more spread out than in solids or liquids, and the atoms collide randomly with one another. A gas will fill any container, but if the container is not sealed, the gas will escape. Gas can be compressed much more easily than a liquid or solid.

The density of ice at its melting point is less than density of water. Ice have less density than water, that is why ice float on water.

Environment day falls on 5th June.

Plant hormones are typically transported through specialized tissues like the xylem and phloem within the plant, aiding in long-distance communication. In contrast, animal hormones are primarily transported through the bloodstream or other bodily fluids, enabling them to reach target tissues and organs throughout the organism for various physiological responses.

Points (ii) and (iv) are correct. An atom consists of a positively charged, dense and very small nucleus which have all the protons and neutrons. Positive charge is due to protons, as neutrons have no charge. Most of the space is empty because most of the alpha particles pass straight through the gold foil without any deflection.
Electrons have negative charge, it was explained by Thomson. The existance of neutron was discovered by Chadwick.

The number of molecules in a sample is determined by Avogadro's number, which is the same for all substances. Hence, for a given mass, the substance with the smallest molar mass will have the most molecules. Among the options, H2 has the smallest molar mass.

• Rajiv Gandhi Canal:




• This canal did not bring about greenery in Rajasthan.




• Indira Gandhi Canal:




• This canal played a significant role in bringing greenery to Rajasthan.


• It is the longest canal in India and has been instrumental in transforming the arid regions of Rajasthan into fertile agricultural lands.


• The canal provides water for irrigation to numerous districts and has helped in increasing agricultural productivity.




• Jawaharlal Canal:




• There is no canal named Jawaharlal Canal in Rajasthan.




• Mahatma Gandhi Canal:




• This canal does not exist in Rajasthan.

Therefore, the correct answer is Indira Gandhi Canal (Option B) as it has been responsible for bringing about greenery in Rajasthan.

Lead being metal is a bad conductor of electricity and heat. Compared to other metals, lead is a poor conductor of heat while gold, silver, platinum are good conductors of heat.

Green plants in a terrestrial ecosystem typically capture around 1% of the sunlight energy that falls on their leaves and convert it into food energy. This process, known as photosynthesis, is vital for the survival of plants and the flow of energy through ecosystems.

Bio-gas is not a fossil fuel.

Animals solve problems by understanding – like human beings, instead of going through either the trial and error process or stimulus response association. In this case, learning took place by insight. Learning by insight involves finding a solution to the problem by thinking over the problem and understanding the various aspects of the problematic situation.
Insight learning refers to the sudden realisation of the solution of any problem without repeated trials or continuous practices. To further elaborate on its definition, insight learning is the type of learning in which one draws on previous experience and also seems to involve a new way of perceiving logical and cause-and-effect relationship.

The behavioristic approach focuses on the mechanics of learning.

• Behaviorist approach is the study of cognitive development that is concerned with the basic mechanics of learning. Learning - changes in behavior because of experiences (excluding changes due to fatigue, injury, or drug effects), is at the center of this approach.
• The central tenet of behaviorism is that an organism learns behavioral adaptation, whose learning is governed by the principles of association (forming connections between ideas and events).
• Behaviorism stands apart from other approaches by its emphasis on the relationship between observable behavior (responses) and environmental events (stimuli).

Behaviorism or the behaviorist approach lays stress on the role of environmental stimuli in determining the way we act. Behaviorism is also referred to as behavioristic psychology.

The stage of the embryo which nearly resembles a human being is called a fetus. Learning starts at fetal stage when a child starts reacting to different stimuli, as the sense organs are developed by this time.
The fetal nervous system starts developing very early in pregnancy. The main subdivisions of the brain are, in a basic form, visible at five gestational weeks. At about gestational weeks 25-29, the fetus is even able to hear internal (e.g. from the maternal gastrointestinal system) and external sounds. So, obviously the fetus gets a vague idea from the external environment through its senses, far before birth. Some studies even demonstrate that fetal heart rate patterns change distinctively, depending on whether the unborn child is exposed to the maternal voice or another female voice.

NTA is responsible for conducting standardized university entrance exams as per the recommendations of NEP 2020.

Socialization is an important process for the functioning and continuation of society. It is a process of learning the rules, habits, and values of a group to which a person belongs whether it is family, friends, colleagues, or any other group.

Howard Gardner's theory of multiple intelligences emphasizes the unique abilities of each individual that removes the idea of valuing intelligence as a single general ability for all. According to him, the learners should not be restricted to one modality of learning. As per his theory, intelligence is a physiological ability of processing information, activated in a cultural setting to reach the specific solution of a problem.
Hence, the correct answer is, 'The unique abilities of each individual.'

Assessment eventually improves student's learning. Student can improve his learning by knowing his mistakes through assessment. He can learn from his past mistakes and can improve his performance in the next assessment.

The root to eliminate issues in the classroom is to identify the reason for a particular behaviour. Only then the issue could be resolved. The teacher must know the cause of misbehaviour, which could arise out of some confusion within the students, and the teacher then can effectively solve the problem. This also helps the teacher to make interpersonal relationship with the students, as a result of which the students confide more in their teacher.

In lower classes, the play-way method of teaching is based on Psychological principles of development and growth. Psychology is something arising in a mind or is related to the mental or emotional state of a person.
So, Play-way methods are such that can affect the cognitive or mental development of the children. They start perceiving, thinking and gains understanding.
Hence, the correct answer is, 'Psychological principles of development and growth.'

Brio Technologies received the prestigious 2024 Google Cloud Sales Partner of the Year Award for India, acknowledging their excellence in driving digital transformation through AI and cloud services, as well as their expertise in infrastructure modernization and data & AI solutions.

Coal is different from the others. It is found at its site of deposition as a solid and relatively pure massive organic substance, whereas Petrol, paraffin wax and grease are related to each other. Petroleum is recognized as a liquid that migrates readily from its place of origin into porous reservoir rocks. Paraffin wax comes from petroleum. It is recognized as a by-product that is created when crude oil is refined. Grease, thick, oily lubricant comprises inedible lard, a petroleum-derived or synthetic oil containing a thickening agent.
Hence, the correct answer is, 'Coal.'.

By increasing his speed by 25%, he will reduce his time by 20%. (This corresponds to a 6 minute
drop in his time for travel—since he goes from being 10 minutes late to only 4 minutes late.)
Hence, his time originally must have been 30 minutes. Hence, the required distance is 20 kmph ×
0.5 hours = 10 km.

The length of the circular track would be equal to the circumference of the circle. In 2 minutes
thus, the cyclist covers 3.14 × 200 = 628 meters (using the formula for the circumference of a
circle).
Thus, the cyclist’s speed would be 628/2 = 314 meters/minute.