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

Isotopes are the atoms of the same element with similar atomic number but different atomic mass.The elements of isotopes share same chemical properties but different physical properties

Ethanoic acid (also known as acetic acid) , if added to water to form a 5-8% solution, is called vinegar.

The kidney is the excretory organ of the vertebrates. Each kidney has nearly one million complex tubular structures called nephrons, which are the functional units of the kidney and serve to filter wastes from the blood

Short-sightedness (myopia) usually occurs when the eyes grow slightly too long, which means they're unable to produce a clear image of objects in the distance.

Tissues in a multicellular organism ensure division of labour, where different types of cells perform specific functions, contributing to the overall functioning of the organism.

Natural gas is a non-renewable fossil fuel formed from the remains of tiny sea plants and animals that died 300-400 million years ago.

The colours of aqueous solutions of CuSO₄ and FeSO₄ as observed in the laboratory are dark blue and pale green respectively.

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.

In F2 -3 tall : 1 dwarf This is the law of segregation. 1 Homozygous tall 1 Homozygous dwarf 2 Heterozygous tall.

Ethanol is firstly oxidized to acetaldehyde and the acetaldehyde is then oxidized to acetic acid. This reaction is considered as a green catalytic process for the only reduction product is water.

The function of pupil is to control the amount of light entering the eye and the iris controls the pupil.

The main characteristic of epithelial tissues is cells can be subjected to rapid division. Epithelial tissue is abundant all over the body. They form the covering of all surfaces of the body, line cavities of the body, and hollow organs and are the main tissue in glands.

Alkenes contain C-C double bond whereas alkynes contain C-C triple bond.

Induces breeding is a very common technique that is carried out in the fishes. It stimulates the pituitary hormone in the fish breeders to increase the reproductive capacity.

Individuals formed by asexual reproduction have the same genetic make up as that of parent.

The main constituent of bio-gas is methane gas (about 75%).

The IUPAC name of the compound above is 2-acetoxy benzoic acid.

The 'Khadin' system of rainwater harvesting was practiced in ancient times in Rajasthan. In this system, a very long (about 100 m - 300 m long) earthen embankment called 'Bund' is built across the lower hill slopes lying below gravelly uplands. The rainwater from the catchment area is made to flow down the slopes and stopped by the 'Bund' to form a reservoir. The rainwater collected in the reservoir formed by the 'Bund', and in the well, gradually penetrates into the land (or ground). This water - saturated land is subsequently used for growing crops. In this way, rain water harvesting was done using khadin system in Rajasthan.

Urea is the primary nitrogenous waste removed by the kidneys.

The kinesin, myosin and dynein proteins of skeletal muscle involve ATPase activity. This cause the contraction of skeletal muscles, propelling action of cillia and flagella and the intracellular transport of organelles.

The near point of the eye is the minimum distance of the object from the eye, which can be seen distinctly without strain. For a normal human eye, this distance is 25 cm.

The far point of the eye is the maximum distance to which the eye can see the objects clearly. The far point of the normal human eye is infinity.

NEP 2020 recommends the use of the mother tongue or local language as the medium of instruction for foundational education.

Playgrounds are essential safe spaces where children can be themselves and express their fun-loving nature while developing crucial cognitive, physical, social, and emotional skills.

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.'

Microsoft and OpenAI are jointly embarking on a $100 billion project to create “Stargate,” an AI supercomputer. Scheduled for launch in 2028, it follows OpenAI’s AI upgrade in 2022. The project aims to surpass existing data centers’ capabilities by 100 times. Divided into five phases, with Stargate as the fifth, a smaller fourth-phase supercomputer is slated for release in 2026. Significant costs will be allocated to acquiring essential AI chips.

Nepenthes is recognized as a genus of carnivorous plants. It is also referred as tropical pitcher plants, or monkey cups, in the monotypic family Nepenthaceae. Indian Pitcher Plant is found in the Khasi Hills of Meghalaya. The plant's species has a very localized distribution and is critically endangered. It is known to be the only species of Pitcher Plant found in India.
Hence, the correct answer is, 'Meghalaya.'

Sarita's teacher is following learning as a social activity. Group work creates more opportunities for critical thinking and can promote student learning and achievement. Student group work enhances skills like communication and other professional development skills. All of these skills are critical to successful teamwork in the classroom.
Hence, the correct answer is, 'Learning as a social activity.'

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.