OSSSC TGT Science PCM Mock Test - 2 - OTET MCQ

All exams must be conducted for the backward children. Emphasis must be paid on providing proper education to them so that they can easily face all examinations.

Socialisation of a child can be measured by social welfare method. 

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.'

The reason behind Kritika's this behaviour shows that her thoughts get acknowledged in schools. Sometimes it happens with children, if they feel that they are not being given importance or no one will praise them then they adopt such kind of behaviour that they talk only to those people who praise them gives due importance. Hence, the correct answer is, 'Her thoughts get acknowledged in schools.'

Current flows in a conductor due to the flow of negatively charged electrons. However, the direction of conventional current is taken to be opposite to the direction of flow of electrons. It can therefore be considered as the direction in which positive charges move.

Microwave is a form of electromagnetic radiation with wavelengths ranging from about one meter to one millimeter; with frequencies between 300 MHz (1 m) and 300 GHz (1 mm). Different sources define different frequency ranges as microwaves; the above broad definition includes both UHF and EHF (millimeter wave) bands.
Answer B and D both are correct.

Wire bound resistors are made by winding the wires of an alloy, viz. manganin, constantan, nichrome etc. The choice of these materials is dictated mostly by the fact that their resistivities are relatively insensitive to temperature. These resistances are typically in range of a fraction of an ohm to a few hundred ohms.

The resolving power of a telescope is given by RP∝2μsinθ​/122λ
Further, sinθ ∝ tanθ ∝ diameter of the objective.
So, the resolving power of a telescope depends on the diameter of the objective lens.

Rare earth elements are those found in the lanthanide series of the periodic table (all 15 of them), plus scandium (Sc) and yttrium (Y). These elements are all Period 3 (that is, column 3 in the table); scandium is element 21, yttrium 39, and the lanthanides from 57 - 71.

Electron gain enthalpy becomes more negative across a period while it becomes less negative in a group.
However, electron gain enthalpy of O or F is less than that of the succeeding element. When electron is added to n = 2, the repulsion is more than when it is added to n = 3 in case of Cl or S.

In Doberiner’s triad, mass of the middle element should be the average of the first and last element. In option b, Atomic mass_Ca is not equal to the mean of atomic mass of Mg and Sr.

1 u (atomic mass unit) or 1 amu is defined as 1/12th of the mass of a carbon-12 atom.

The correct option is C.
Acetic acid that is Carboxylic acids gives effervescence with NaHCO₃ solution.

ZnO(s) + CO(s) → Zn(s) + CO₂(g)

• Since oxygen has combined with carbon, carbon is the one that is oxidized and ZnO is the oxidizing agent. Similarly carbon has taken the oxygen of ZnO, carbon is the reducing agent and ZnO is the one that has been reduced.
• Reducing agent-C
• Oxidizing agent-ZnO
• Oxidized-CO
• Reduced- ZnO

So Option C is correct

The chemical composition of the Universe is dominated by the hydrogen and helium produced in the Big Bang. The remaining 90 or so chemical elements are produced in stars and constitute only a few percent of the overall mass. Astronomers refer to these elements (all except hydrogen and helium) as metals, even though this includes elements such as carbon and oxygen which are not considered metals in the normal sense.
Chemical composition of the Sun

Compound is a thing that is composed of two or more separate elements; a mixture. A compound is always homogeneous (uniform). Compounds cannot be separated by physical means. Separating a compound requires a chemical reaction. The properties of a compound are usually different than the properties of the elements it contains.

Nonmetals are present on the right hand side of the periodic table. They are usually solids or gases at room temperature with low melting and boiling points (boron and carbon are exceptions). The only liquid non-metal is bromine. Most non-metals are brittle and are neither malleable nor ductile. 

Since x−coordinate is called abscissa. 
Therefore, abscissa is −5.

LHD = limh→0 ((−h)² sin(−1/h) − 0)/−h
limh→0 −h² sin(1/h)/−h
= limh→0 h × sin(1/h)
= 0
RHD = limh→0 (h² sin(1/h) − 0)/h
= limh→0 h × sin(1/h)
= 0
RHD=LHD
∴ f(x) is differentiable at x= 0

f(g(2)) compare f(gx) x=2
on comparing g(x)=x, g(2)=2
f(g(x)) = f(2) = x² = 2²= 4

A solid has shape, size, position and can be moved from one place to another. So, solid has three dimensions

 A point is that which has no part i.e., no length, no breadth and no height. So, it has no dimension.

 Boundaries of a solid are called surfaces. A surface (plane) has only length and breadth. So, it has two dimensions.

In a diagonal matrix all elements except diagonal elements are zero.i.e. 

When a is positive, the parabola is opening to the right and since directrix is x=-a, it gives the answer.

h² = 4k 
slope of normal=−1/(dy/dx) = −2h
equation of normal(y − k)= −2h(x−h)
k = 2 + 2/h(1 − h)
(h²) / 4 = 2 + 2/h (1 − h)
h = 2, k = 1
equation of line (y - 1)= -1(x - 2)
x + y = 3

Side of the square = √32 = 4√2
Diagonal of the square = side√2 = 4√2 × √2 = 8 cm
Hence, Option B is correct.

The assertion is false because the degree of the polynomial is determined by the highest power of x, which is 4 in this case, making it a polynomial of degree 4. The reason is true because the highest power of x indeed determines the degree of a polynomial, but it incorrectly describes the polynomial in the assertion.