OSSSC TGT Science PCM Mock Test - 7 - OTET MCQ

The word intrapersonal means within the self-so, intrapersonal intelligence is another term for self-awareness or introspection. People who have high intrapersonal intelligence are aware of their emotions, motivations, beliefs, and goals. They are able to discriminate among similar emotions.

Heredity and Environment operate together to produce a person's intelligence, temperament, height, weight, etc. The relative contributions of heredity and environment are not additive. It cannot be said that such-and-such percentage of nature, and such-and-such percentage of experience makes us who we are. The genetic expression also does not happen just once. Genes produce proteins throughout the lifespan, in many different environments.

Motivation is the process of learning that defines a reason for a person to do something or the desire a person has to do something. It creates interest in learning among young learners. If learners are motivated they will perform their work efficiently and effectively and if they are not motivated to do something then it will affect their performance.
Hence, the correct answer is, 'Creates interests for learning among young learners.'

The process of learning can take place everywhere. It is not limited to a particular place, it can take place in a formal setup or in the informal or non-formal setup. Non-formal setup does not require any curriculum, syllabus, etc whereas formal setup requires curriculum, syllabus, etc. Learnings in educational institutions are known as formal learning. Learning is a comprehensive, goal-oriented process.
Hence, the correct answer is, 'Educational institutions are the only place where learning takes place.'

Adolescence is the stage when children become active members of the peer group. It is a transitional stage of growth and development that lies between childhood and adulthood. According to the World Health Organization, this period occurs between the age of 10 and 19. At this stage, children are more actively involved in their peer group. They share everything with their friends instead of family. They are more comfortable with their peers.
Hence, the correct answer is, 'Adolescence.'

 Answer :- b

Solution :- The temperature co-efficient of resistance of manganin is very low. Hence its resistance is almost independent of temperature. Hence it is used in making standard resistances.

Drift velocity, v=I/nAe
=2/(2x10^-6)x(5x10²⁶)x(1.6x10^-19)
=1.25x10^-2m/s

for concave mirror u=−7.5 ; f=−5
(1/v)+1/u=1/f
1/v-2/15=-1/5
i.e, image formed at pole of convex mirror for convex mirror, u=0;f=+5
(1/v)+1/u=1/f
(1/v)+1/0=1/5
V=0
So the final image is formed on a pole of a convex mirror.

In fibre optics ,an optical phenomenon known as total internal reflection is used to transmit light rays. In case of the simplest form of optical fiber, light entering one end of the fiber strikes the boundary of the fiber and is reflected inward.

Number of moles = Mass (in grams) / Molar mass.

Avogadro's number represents the number of particles (atoms, molecules, ions) in one mole of a substance. Therefore, the number of moles (n) is equal to the number of particles (N) divided by Avogadro's number (No).

The simplest organic compounds are made up of only carbon and hydrogen atoms. Compounds of carbon and hydrogen only are called hydrocarbons. For example, methane.

Crystallization is the process where a solid substance is formed, with atoms or molecules arranged in a strong structure called a crystal. It can occur through various methods like precipitation from a solution, freezing, or direct deposition from a gas.

If a strong acid reacts with a weak base, the resulting solution tends to be acidic. This outcome is due to the dominance of the acidic properties in the reaction. The strength of the acid influences the pH of the solution after the reaction.

Answer:
To determine which of the following options is heterogeneous, let's first understand the concept of heterogeneity.
Heterogeneous mixtures are mixtures that have different components or substances that are not uniformly distributed throughout. In other words, the composition of a heterogeneous mixture is not the same in all parts of the mixture.
Now let's analyze each option:
A:

Stainless steel

Stainless steel is an alloy composed of iron, carbon, and other elements such as chromium and nickel. It is a homogeneous mixture as its composition is uniform throughout.
B:

Brass

Brass is an alloy composed mainly of copper and zinc. Similar to stainless steel, it is a homogeneous mixture as its composition is uniform throughout.
C:

Air

Air is a mixture of gases, primarily nitrogen, oxygen, carbon dioxide, and trace amounts of other gases. While it may have variations in the concentration of these gases in different locations, it is considered a homogeneous mixture on a larger scale.
D:

Smoke

Smoke is a complex mixture of solid particles, liquid droplets, and gases. It is considered a heterogeneous mixture as its composition is not uniform throughout. It contains visible particles suspended in the air, giving it a non-uniform appearance.
Therefore, the correct answer is option D: Smoke. Smoke is a heterogeneous mixture.

The change of solid directly into vapours is called  Sublimation. The change of liquid state into vapours without coming to it's boiling point is called Evaporation. The latent heat of Vaporization is the heat required to change the state of 1 kg into vapours. Latent heat of fusion is the heat required to Change the state of 1 kg of solid  into liquid.

Hydrogen as a fuel in Sun. The source of Sun's incessant energy is hydrogen which is continuously converting to helium through nuclear fusion reaction releasing energy.

Calcium hydride is called hydrolith because CaH₂ is a saline hydride,meaning that its structure is salt-like.

Dienes are the name given to compounds with two double bonds.

The lanthanides series include elements 58 to 71 which fill their 4f sublevel progressively. The actinides are elements 89 to 103 and fill their 5f sublevel progressively.The lanthanides are f-block elements which contain seven f-orbitals . The maximum electrons can be filled in f-orbitals are 14. Hence, lanthanides have a total 14 elements.The actinide series always includes the 14 elements with atomic numbers 90 through 103. The other members are (in order of increasing atomic number) thorium, protactinium, uranium, neptunium, plutonium, americium, curium, berkelium , californium, einsteinium , fermium, mendelevium, nobelium, and lawrencium.

Most paints are sols in which tiny solid particles are dispersed in a liquid medium.

No. of proper subsets = 2ⁿ-1

Given equation of circles are
x²+y²+6x+6y=0....(i)
and x²+y²−12x−12y=0....(ii)
Here, g1 = 3,f2 = 3, g2 = −6 and f₂ = −6
∴ Centres of circles are C₁(−3,−3) and C₂(6,6) respectively and radii are r₁ = 3√2 and r₂ = 6√2 respectively.
Now, C₁C₂ = √[(6+3)² + (6+3)²]
= 9√2
and r₁ + r₂
​= 3(2)^1/2 + 6(2)^1/2
= 9(2)^1/2
​⇒ C₁C₂ = r₁ + r₂
∴ Both circles touch each other externally.

Option A: If n is integer similarly n²- 1 is not divisible by 8.
Option B: If n is a natural number then it is not possible for n=1,2.
Option C: If n is odd the possible for n is 3,5,7...
Option D: If n is even then it is not possible for n=2.

Thus, the option C is correct.

We have to find the value of

H.C.F.(p,q,r)× L.C.M.(p,q,r) ≠ p×q×r. This condition is only applied on HCF and LCM of two numbers.

• Every set has the empty set as a subset. So if a set has 1 element, like {0}, then it will have 2 subsets: itself and the empty set, which is denoted by { }.
• So, if a set has only one subset, then this set must be the empty set.

f(x) = 1 + 2x² + 4x⁴ +...............+ 100x¹⁰⁰
= f’(x) = 4x + (4)² x³ + (6)² x⁵ +......................+ (100)² x⁹⁹
f’(x) = x[(2)² + (4)² x² + (6)² x⁴ +....................+ (100)² x⁹⁸
f’(x) = 0(only one minimum)

It is given that :  are unit vectors such that 
then :

Position vector of A = OA = a
Position vector of B = OB = b
Now, AC = OC - OA
Also, AB = OB - OA
Given, AC = 3AB
⇒ OC - OA = 3(OB - OA)
⇒ OC = 3b - 2a