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

The correct answer is A as t's configuration is 2,8,6 therefore it's valency is 2 as it needs two electrons to complete its octet.
It is a non metal because as we go from left to right in a periodic table the metallic character decreases while non-metallic character increases.

The mixture in which particles are not distributed evenly and forms separate layer if left undisturbed. The mixture of Albumin and water forms a heterogeneous mixture

Biogas is produced from organic waste which biodegrades by means of bacteria in an anaerobic environment through a process of Anaerobic Digestion. It uses anaerobic digestion to recycle the organic materials (plant and animal products), turning them into biogas, which contains both energy (gas), and valuable soil products (liquids and solids). Anaerobic digestion is a series of biological processes in which microorganisms break down biodegradable material in the absence of oxygen. Hence the correct answer would be (A).

Having nephrons packed close together maximizes the kidney's ability to filter blood efficiently by providing a large surface area for filtration.

Primary alcohols and aldehydes are normally oxidized to Carboxylic acids using potassium Dichromate solution in the presence of dilute sulfuric acid.

Rohu is a species of carp family, found in rivers of Indian subcontinent and extensively used in aquaculture. The large silver coloured Rohu fish is an important aquacultured freshwater species. Katla or Catla also known as major Indian carp is commonly found in rivers and lakes of India and one of the most popular species of freshwater fish. The catla along with roho labeo and mrigal carp are the most important aquacultured freshwater fish in India.

• Tendons connect muscles to bones. Tendons (another type of tough connective tissue) on each side of a joint attach to muscles that control the movement of the joint.
• Ligaments connect bones together.

Tidal energy is harnessed by constructing a dam near the shores across narrow opening it

The food chain is a sequence of populations or organisms through which food and energy are passed on an ecosystem with the members of each trophic levels. A food chain shows who is eating whom. Here, organisms of higher trophic level derive its nutrients from organisms of a lower trophic level.

Objects are not visible through the fog because droplets scatter the light rays.

Sun is the ultimate source of energy directly or indirectly, all the form of energy are desired from solar energy.

H₂CO₃ + NaOH → NaHCO₃ + H₂O

Teaching aids are helpful for teachers as well as for pupils. The use of such techniques encourages teacher; it makes teaching easier and effective, and teachers invest more in their lessons. It also generates interest of students in the topic; hence they pay more attention. Also such techniques can be used as a supplement for verbal and visual instructions. So all the statements are correct.

Key Points 

• It is well knowledge that young infants acquire significant concepts more quickly in their mother tongue or home language.
• The mother tongue or the language used by the neighborhood is typically the same as the home language.
• However, there may occasionally be a home language used by other family members in multilingual households that is distinct from the mother tongue or the local vernacular.
• National Education Policy 2020 proposes that wherever feasible, the home language, mother tongue, local language, or regional language will be used as the medium of teaching until at least Grade 5, but preferably until Grade 8 and beyond.

Hence, At the primary level, National Education Policy 2020 proposes mother tongue/Home language as the medium of instruction across the nation.

The term 'Curriculum' within the field of education refers to the overall program of the varsity which students experience on a day-to-day basis. It is a planned sequence of instruction in terms of educator's and school's instructional goals. as a gaggle of learning goals. It is attached across grades that outline the intended mathematics content and process goals at particular points in time throughout the K–12 school program.
Hence, the correct answer is, 'Overall programme of the school which students experience on a day-to-day basis.'

Use of TV and video cassettes while teaching demonstrates that the teacher has good command over techniques of teaching.
Teaching is an art; but in a modern age, science has given us so many technologies, which can be used for teaching purpose and they are very helpful in explaining the concepts in a better way. A very good quality of a teacher is to use all these modern technologies for teaching.

A teacher who changes the method of teaching according to the students and requirements is said to be research minded. This is a very good quality of a teacher by which he/she involves students by engaging them with different interests. A teacher who is always thinking about something may be introspecting but not research minded.

In education process aim, content and methods are evaluated.

Evaluation is concerned with assessing the effectiveness of teaching, teaching strategies, methods and techniques. It provides feedback to the teachers about their teaching and the learners about their learning.

Almost 70% of Botswana territory comprises the Kalahari Desert.

Diagonal of a room = √(l² + b² + h²)
So the answer = √(20² + 10² + 20²) = √900 = 30 meters
Hence, Option B is correct.

Diameter of the circle = breadth of the rectangle = 42 meters
Radius of the circle

So the answer 

Hence, Option D is correct.

Initial number of balls = 90 + 110 + 150 + 50 = 400
Balls removed = 50% of 90 + 70% of 110 = 122
Remaining balls = 278

Hence, Option D is correct.

The logic followed is:

ROSE is coded as 6821

CHAIR is coded as 73456

PREACH is coded as 961473

Therefore SEARCH will be written as

Hence, the correct answer is "214673".

Given number: 

5934162

New number after digits are arranged in descending order:

9654321

Thus we can see only position of one digit is remain unchanged.

Hence, the correct answer is "One".