Chandigarh TGT Science - Non Medical Mock Test - 3 - SSA Chandigarh MCQ

ਸਹੀ ਜਵਾਬ ਹੈ , ਕਾਰਕ ਚਿਨੂ

Additional Information ਜਿਹੜੇ ਸ਼ਬਦ ਨਾਂਵ ਜਾਂ ਪੜਨਾਂਵ ਦਾ ਵਾਕ ਦੇ ਕਿਰਿਆ ਵਾਲੇ ਸ਼ਬਦਾਂ ਜਾਂ ਵਾਕ ਦੇ ਦੂਜੇ ਸ਼ਬਦਾ ਨਾਲ ਸੰਬੰਧਾਂ ਨੂੰ ਦਰਸਾਉਣ ਉਨਾਂ ਨੂੰ ਕਾਰਕ ਕਿਹਾ ਜਾਂਦਾ ਹੈ।
ਕਾਰਕ ਚਿਨ-ਵਾਕ ਵਿੱਚ ਜਿਹੜੇ ਸੰਬੰਧਕਾਂ ਰਾਂਹੀ ਇਹ ਸੰਬੰਧ ਪ੍ਰਗਟ ਹੁੰਦੇ ਹਨ, ਉਨ੍ਹਾਂ ਨੂੰ ਕਾਰਕ ਚਿਨੂ ਆਖਦੇ ਹਨ।

Children think that everything around them, including toys, is alive. This example points to a prominent characteristic of the preoperational stage called ‘animism’ by Piaget. It is a result of egocentric thinking and refers to the tendency of children to assign humanistic qualities to inanimate things.

• They believe that non-living things have desires and think, feel, and act like them.
• A logical consequence of animistic thinking is the strong emotional response towards non-living objects―talking to their toys, taking care of them, and expressing their feelings towards them. 

Theory of Multiple Intelligence which describes eight different kinds of intelligence is propounded by an American cognitive psychologist 'Howard Gardner'.

One of the goals of education is to develop independent learning in students. However, at times, students might need a little push from the teacher in order to achieve that independence. Scaffolding is a technique that helps during such a scenario.

A punishment can never help in making an emotional connect with the children. So, this option is NOT TRUE for corporal punishment.

Potential gradient Is given by V/l. If V and l are constant, the potential gradient also remains constant. The change in the radius will cause a change in the current. This does not change the potential gradient.

The frequency of radiation arising from the two close energy levels in hydrogen known as Lamb shift i.e. 1057 MHz is radio waves as it belongs to the short wavelength end of the electromagnetic spectrum.

Let ray strikes the vertical mirror by angle of incidence θ. Then by joining the perpendiculars of two mirrors it is clear from the diagram that angle of incidence at the horizontal mirror is (90−θ).
 
∴ reflected ray from the horizontal mirror makes angle θ with the horizontal mirror also incident ray at vertical mirror makes angle θ with horizontal axis. 
∴ reflected ray is parallel to the original ray.
This is true for two perpendicular mirrors fixed at any positions.

is the right answer.

The IUPAC name of NaBH₄ is sodium tetrahydridoborate 

The prefix used for 10^-18 is atto-

Additional Information: A metric prefix is a unit prefix that precedes a basic unit of measure to indicate a multiple or submultiple of the unit. Each prefix has a unique symbol that is prepended to any unit symbol. Some important prefixes are given below: 

Standard  molar volume is the volume occupied by 1 mole of a gas at STP.
0.1784 g of He occupies volume = 1 L
4 g (1 mole) of He occupies 4/0.1784 = 22.4 L

Different molecular mass, so no isomerism

The correct answer is option  D
Vitamin B₁₂
The body has a limited capacity to store most of the B-group vitamins except B₁₂ and folate, which are stored in the liver.

The reason for the putting of VII A group is that the reaction of hydrogen with group 1 elements as the same as that of other halogens.

• Precision indicates how closely repeated measurements match each other.
• Accuracy indicates how closely a measurement matches the correct or expected value.

Since the readings closely match the result and the expected value, the correct answer is that the values are both accurate and precise. 

Using the result, HCF × LCM = Product of two natural numbers
 ⇒ LCM (a, b) = 1800/12 = 150

 In set theory, if A and B are sets, then the union of A and B , written A ⋃ B, is {x: x ∈ A or x ∈ B}. By asserting that x ∈ A or x ∈ B, we do not exclude the possibility that x is a member of both A and B. Further, if the same object/element is member of both A and B, then that element is counted only once in the new set formed by the union of A and B.
Given, A = {1,2,3,4} and B = {4,5,6,7,8}.
∴ By definition, A ⋃ B = {1,2,3,4,5,6,7,8}

xe^x = t
(xe^x + e^x) dx = dt
= e^x(x + 1) dx = dt
= ∫dt/sin^2t
= ∫cosec^2t dt
= -cot(xe^x) + c

Suppose that the Reqd. Limit L = lim x→0 (sinx − x)/x³.
Substiture x = 3y , so that, as x→0 , y→0.
∴ L = lim y→0 sin3y − 3y/(3y)³,
= lim y→0 (3siny − 4sin3y)− 3y)/27y³,
= lim y→0 {3(siny − y)/27y³) − (4sin³y/27y³)},
⇒ L = lim y→0 1/9 * (siny − y)/y³) − 4/27* (siny/y)³...(∗)
.Note that, here,
= lim y→0(siny − y)/y³)
= lim x→0 (sinx−x)/x³) = L.
Therefore, (∗) ⇒ L = 1/9*L − 4/27
or,  8/9L = −4/27
Hence, L = −4/27*9/8
=−1/6

Let X be a random variable assuming values x1, x2,....,xn with probabilities p1, p2, ...,pn, respectively such that  Mean of X denoted by μ is defined as: 

μ = (22 + 26 + 28 + 20 + 24 + 30)/6
= 150/6 
= 25
x(i) = (xi - μ)²
x(22) = (22-25)² = 9
x(26) = (26-25)² = 1
x(28) = (28-25)² = 9
x(20) = (20-25)² = 25
x(24) = (24-25)² = 1
x(30) = (30-25)² = 25
​
(xi - μ)²  = 70
Standard deviation : [(xi - μ)²]/N
= (70/6)^½
= 3.42

Let A and B be independent events with P (A) = 0.3 and P(B) = 0.4 

• We have, A^c in X = The set of elements in X which are not in A = 0,1
• {0} ∈ A^c w.r.t. X is false, because {0} is not an element of A^c in X.
• ϕ ∈ A^c in X is false because ϕ is not an element of A^c in X.
• {0} ⊂ A^c in X is correct because the only element of {0} namely 0 also belong to A^c in X.
• 0 ⊂ A^c in X is false because 0 is not a set.

Out of 9 socks, 2 can be drawn in ⁹C₂​ ways. 

Therefore, the total number of cases is ⁹C₂​.

Two socks drawn from the drawer will match if either both are black or both are blue.

Therefore, favorable number of cases is ⁵C₂​+ ⁴C₂​.

Hence, the required probability is 

(⁵C₂​+ ⁴C₂​.)/ ⁹C₂

= 4/9