Bihar STET Paper 2 Chemistry Mock Test - 9 - Bihar PGT/TGT/PRT MCQ

We know that power is energy per second. So by this definition, 187W means 187J/s energy is given. 
And 35J work is done.
So energy dissipated in the form of friction= 187 - 35 = 152J

Based on VSEPR model, it is (T-shaped).
Thus, (i) → (r)


AX₄E₂ (Square planar)

Thus, (ii) → (s)
(iii)   lone pair = 1, AX₄E (See-saw)

Thus, (iii) → (q) 
lone pair = 3

Linear structure
Three lone pairs are at equatorial position to minimise repulsion.
Linear structure.
Three lone pairs are at equatorial position to minimise repulsion.
Thus, (iv) → (p)

Photoelectric effect proves the particle nature of light.

⇒ Exothermic low temperature
∴ Addition of reactant Δn_g < 0
⇒ Increase in pressure lower the volume.

Greater the number of hydroxy groups , greater its a bility to form H-bonds with water, hence greater solubility.

100 g brine solution has 3.87 g NaCI.

Reaction involves rearrangement of carbocation

The oxidation state of superoxide is -1/2 . and there is two superoxide so oxidation state of Rb is +1.

Adsorption and absorption is commonly known as sorption.

(B)
HCP = AB AB AB . pattem repeat For calculating voids between two layers A and B. Total tetrahedral voids = 12 (represented by dots) out of which 8 are completely inside but rest are shared by other unit cells. Total octahedral voids = 6 (represented by cross). All are completely inside. 

• An ionic compound is a giant structure of ions.
• The ions have a regular, repeating arrangement called an ionic lattice .
• The lattice is formed because the ions attract each other and form a regular pattern with oppositely charged ions next to each other.

The correct answer is option A
Due to solute presence in the solution, the solution's boiling point is greater than the pure solvent's boiling point. This is called as elevation in boiling point and it can be represented as:
ΔT_b​=K_b​ × molality

• John Newlands arranged the known elements in increasing order of their atomic masses.
• He started with the element having the lowest atomic mass ( hydrogen) and ended at thorium which was the 56th element.
• He found that every eighth element had properties similar to the first.

Aspirin (Acetylsalicylic acid) is a chemical substance which lowers body temperature(antipyretic property) and reduces pain as well(analgesic property). Therefore it acts both as an analgesic and antipyretic.

Alkyl halides on heating undergo rearrangement into higher degree alkyl halide as :

It is an α, β-unsaturated ketone which can be formed in an aldol condensation followed by dehydration.

Both (S – 1) & (S – 2) are true and (S – 2) is not the correct explanation of    (S – 1)

(b)

Closest distance between two gold atoms is half of the diagonal.

Note There are total of 12 nearest neighbours (six along diagonal and six along the edges],

Inclusive Education:

• Inclusion in education refers to a model wherein students with special needs spend most or all of their time with non-special needs students. 
• Inclusive education means all children in the same classrooms, in the same schools. It means real learning opportunities for groups who have traditionally been excluded – not only children with disabilities but speakers of minority languages too.

Important Points

Models of inclusive education:

• Non-academic models: In this model, the students with disabilities participate only in non-academic class activities such as art, music, physical education, and other electives. This model is more appropriate for our lower functioning, alternate assessment students.
• Social mainstreaming model: This model provides the opportunity for disabled children to develop their social, emotional, and interpersonal skills. The students are encouraged to work together. They are aware of the strengths and weaknesses of each other in the classroom. Normal students become actively involved with disabled students and teachers in the group. In this model, the students with disabilities are included during regular classroom instruction to provide/her with appropriate interaction with non-disabled peers.
• Self-contained model: A self-contained classroom means that the child will be removed from the general school population for all academic subjects to work in a small controlled setting with a special- education teacher. Such classes offer structure, routine, and appropriate expectations, but some students may require a higher level of specialization.
• Pull-out (Resource) model: In this model, specialists work closely with students outside of the general education classroom. Instructional support or related services are provided in small groups or one-to-one in a separate setting.

Conclusion: 
An inclusive classroom is a term used within American pedagogy to describe a classroom in which all students, irrespective of their abilities or skills, are welcomed holistically. It is built on the notion that being in a non-segregated classroom will better prepare special-needs students for later life. There are various models used to describe the settings of the inclusive classroom.

• The non-academic model emphasizes the participation of special children only in non-academic activities such as music, art, etc. on the other hand, the social mainstreaming model emphasizes teaching special and non-special students together in the same settings.
• Self- contained model talks about training special needs students in controlled condition with a special educator while the resource model talks about teaching and training special needs students outside the general classroom.

So, from this, we can conclude that the social mainstreaming model talks about the model of inclusive education in which a student is included during regular education classroom instruction to provide the student with appropriate interaction with non-disabled peers. The student is given shortened assignment. Hence, option (2) is correct.

Learning by doing means activities-based learning.​It is the process of doing my own hands practically. It encourages the students to participate in their own learning experiences.

Key Points 
 Benefits of Activity-based Learning-

• The students in primary classes should be taught through various activities and hands-on experiences.
• Learning the concept by doing meaningful, hands-on activities related to the concept.
• The teacher teaches their students according to their needs and interest. Teaching should be child-centered.
• Activity-based teaching makes the classroom joyful and interesting. It can be completely self-led by each child or, the teacher could set some goals, and give hints and basic composition skills, Teacher keeps all the children actively involved in this activity by building a constant challenge into the exploration. 
• The teaching should be connected with real life. The teachers should take examples from the daily life of students so that they feel connected and interested.
• The teacher should use teaching aids from their real environment, nothing is better than this. For example, teachers should use pebbles to teach their students how to add and subtract.

Thus, it infers that Activity-based teaching makes the classroom joyful.

Kinesthetic/tactile persons learn best through a hands-on approach, actively exploring the physical world around them. Thus, using the hands-on approach may not help Sita much.

Audiovisual aids are those which make lessons interesting, simple, and understandable.

• It creates the interest of students in a classroom.
• It promotes self-learning and creativity in students.
• With the help of teaching aids, teachers make their teaching interesting as well as improve their teaching with the help of these aids.

Key PointsAudiovisual aids are those aids that are used to encourage teaching-learning in the classroom. Audio-Visual aids help the teacher because:

1. Audio-visual aids promote self-learning in the students.
2. It helps the teachers because they make the lesson effective and interesting because it enables the teachers to follow the maxims of teachings like known to unknown and concrete to abstract.
3. It helps to create the interest of the students.
4. The time and energy of teachers and students are saved and it helps to make the concepts more clear, more precise, and easy.
5. These aids are the best motivators. The students work with more interest and enthusiasm.
6. These aids are useful for teachers as the use of teaching aids makes the lesson interesting.
7. With the help of these aids students active in their mental and physical activity.
8. It develops a scientific attitude in the students.

Thus, it is concluded that audio-visual aids help the teacher because they make his lesson effective.

Additional Information

Learner-centered teaching methods shift the focus of activity from the teacher to the learners.

Key Points

Learner-centered teaching methods include: 

• Active learning, in which students solve problems, answer questions, formulate questions of their own, discuss, explain, debate, or brainstorm during class.
• Cooperative Learning is an instructional method in which students work in small groups to accomplish a common learning goal under the guidance of the teacher.
• Inductive learning, also known as discovery learning, is a process where the learner discovers rules by observing examples. The inductive method of teaching and learning is an umbrella term that includes a range of instructional methods.

All the above methods are learner-centered or student-centered because they impose more responsibility on students for their own learning than the traditional classroom lecture-based deductive approach does.

Additional Information

•  Passive learning is defined as “a method of learning or instruction where students receive information from the instructor and internalize it.”
• In basic terms, this means that a student will listen and read the material and reflect internally without further reflection back or reviewing.

In education, teaching is the concerted sharing of knowledge and experience, which is usually organized within a discipline and, more generally, the provision of stimulus to the psychological and intellectual growth of a person by another person or artifact. The steps are in the following order:
(iv) Formulating instructional objectives
(i) Relate the present knowledge with previous one
(v) Presentation of instructional materials
(ii) Evaluation
(iii) Reteaching

An imprint of railway ticket can give all information about the journey to the students.

The side of the square must be the same as the breadth of the rectangle.
Side of the square = 4 meters
So the answer = 4 × 4 = 16 m²
Hence, Option D is correct.

Let AB be the post and AC be its shadow.
Let AB = X m. Then, AC = √3Xm.Let∠ACB = θ.
AB/AC = tanθ => tanθ = X/√3X = 1/√3 = tan30°.
∴ θ = 30°.
Hence, the point of rise is 30°.

From the diagram given below:

The shaded part represents the singers, who are directors but not actors.

Hence, the correct answer is "7".