EMRS PGT Chemistry Mock Test - 6 - EMRS MCQ

• Charles Robert Darwin,in his book “The Origin of Species”, gave the Theory of Evolution by Natural Selection.
• Gregor Johann Mendel, also known as the father of genetics, gave the Law of Inheritance.
• The theory of origin of life on earth proposed by Haldane was confirmed by the experiments conducted by Stanley L. Miller and Harold C. Urey in 1953.

A man walks 30 meters towards South, then turning to his right, he walks 30 meters, then turning to his left, he walks 20 meters, again turning to his left, he walks 30 meters. The figure are given below -

50 meters far is he from his starting point.

Hence, "50 meters" is the correct answer.

The Symbol table is as follows:

1) Rajiv is the brother of Atul.

2) Atul is the son of Sonia.

Implies, Rajiv is also the son of Sonia.

3) Sonia is the sister of Sunil.

Implies, Sunil is the maternal uncle of Rajiv and Atul.

Hence, Rajiv is the "son" of Sonia.

According to question,
A's weight is twice as much as of B.
1. A = 2B.
B's weight is four and half times as much as of C.
2. B = 4.5C
C's weight is half times as much as of D.
3. C = D/2.
D's weight is half as much as of E.
4. D = E/2.
E weight is less than A but more than C.
5. A > E > C
from 1 and 2
6. A = 2B = 9C
from 6 and 3
7. A = 2B = 9C = 4.5D
from 7 and 4
8. A = 2B = 9C = 4.5D = 2.25E
so from 8 and 5
A > B > E > D > C
So, E is lighter in weight than A and B.

Worksheet:
- A worksheet is a grid labeled with columns and rows.
- It is used in software applications like spreadsheets to organize and analyze data.
- It provides a visual representation of data and allows users to input, manipulate, and calculate values.
- Each cell within the worksheet is identified by its unique column and row label.
- Worksheets are commonly used in programs such as Microsoft Excel, Google Sheets, and Apple Numbers.
Columns:
- Columns are the vertical sections of a worksheet.
- They are labeled with letters (A, B, C, etc.) at the top of the worksheet.
- Columns are used to organize and categorize data in a structured manner.
- Each column contains multiple cells that can hold data or formulas.
Rows:
- Rows are the horizontal sections of a worksheet.
- They are labeled with numbers (1, 2, 3, etc.) on the left side of the worksheet.
- Rows are used to organize and arrange data in a tabular format.
- Each row consists of cells that can store information or perform calculations.
Cell:
- A cell is a single unit within a worksheet.
- It is identified by the intersection of a specific column and row.
- Cells can hold various types of data, such as numbers, text, dates, and formulas.
- Users can input, edit, and format data within cells.
- Cells are the building blocks of a worksheet and are used to store and manipulate information.
In conclusion, a worksheet is a grid labeled with columns and rows. Each cell within the worksheet is identified by its unique column and row label. Worksheets are commonly used in software applications like spreadsheets to organize and analyze data.

Teaching profession is a 'mission', rather than a job. A teacher may not find the affirmation of his/her career choice in salary, administrators or even the students whom he/she teaches, but he/she must believe in the uncanny ability of a good teacher to positively impact the future and to leave lasting, indelible marks on those who will one day be the leaders in all facets of society. It is this power in the hands of a teacher that translates to big responsibility. A teacher who realises these things is on a mission to empower, enable and to make a positive difference.

Carbocation at bridge head carbon of bicyclic compound is highly unstable due to lack of planarity.

K₂O + H₂O → KOH

 XeF₂-sp³d hybridised Xe
Three lone pairs on equatorial positions to minimise repulsion; two F-atom at axial position. Thus, it is linear.

(a) TeF₂,Te₅₀ - Six electrons in valence shell

(b)   hybridised l- atom with three lone pairs at equatorial positions to minimise repulsion thus, linear.

(c) SoCI₃ - sp³-hybridised pyramidal Sb-one lone pair on Sb.
(d) BaCI₂ - ionic .

We know that white light is composed of many different colours. When white light is allowed to fall on [Ti(H₂O)₆]³⁺ ion, this ion absorbs the light of green and yellow colour and transmits is almost purple colour.The purple colour of the transmitted light is called complimentary colour of that of absorbed light.

^–OCN is ambident ligand & it shows linkage isomerism.

Hydrogen peroxide has many uses one of the most important uses of hydrogen peroxide is that it acts as a source of power i.e. 90% of hydrogen peroxide is used as fuel and submarines, rockets and helicopters.

Electron donating —CH₃ gro up stabilises benzylic carbocation, hence increases reactivity of corresponding substrate. Electron withdrawing —NO₂ decreases stability of carbocation, decreases reactivity of corresponding substrate in S_N1 reaction

The substance which forms the colloidal solution in water is starch. A colloidal solution is a solution in which the colloid mixes uniformly. All colloids have a Tyndall Effect, which is not exhibited by glucose. Starch is a colloid and thus when mixed with water can form the colloidal solution.

The correct answer is Option A.

Total pressure =290 mm
Vapour pressure of propyl alcohol =200 mm
Mole fraction of ethyl alcohol = 0.6
Mol fraction of propyl alcohol =1− 0.6 = 0.4
 
PT = P⁰_A × χ_A + P⁰_B × (1−χ_A)
290 = 200 × 0.4 + P^o_B × 0.6
0.6 × P⁰B = 290 − 80
P⁰B = 350 mm

Maximum ores are of group 16 elemnts (O, S etc).

The correct answer is Option A.

Out of the given four compounds only the first one has a chiral carbon. Hence compound A is optically active and it can rotate the plane polarised light.
 

This alkaline earth hydride is a colourless solid that is insoluble in solvents that do not decompose it. Unlike the ionically bonded hydrides of the heavier Group 2 elements, beryllium hydride is covalently bonded (three-center two-electron bond).

• Colloidal system is a mixture of two substances, one of which, called the dispersed phase (or colloid), is uniformly distributed in a finely divided state through the second substance, called the dispersion medium (or dispersing medium).
• So, here are 2 phases.

Teachers must be aware of the fact that every child is different from each other. The differences occur from physical characteristics to learning style and ability. The objective of education is to provide the fullest possible development of learners. So, to address the individual differences in students a school should follow a child-centered curriculum and provide multiple learning opportunities to students. The teachers should find out the different strengths and weaknesses of students before adopting an appropriate curriculum.
Hence, the correct answer is, 'Follow a child-centered curriculum and provide multiple learning opportunities to students.'

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 disorder is a disturbance in physical or mental health or functions. It may be caused by genetic factors, disease, or trauma.

The NRF (National Research Foundation) will be governed, independently of the government, by a rotating Board of Governors consisting of the very best researchers and innovators across fields.

Key Points

•  The goal of the NRF will be to enable a culture of research to permeate through our universities.
• The primary activities of the NRF will be to:
  •  fund competitive, peer-reviewed grant proposals of all types and across all disciplines.
  •  seed, grow and facilitate research at academic institutions.
  • act as a liaison between researchers and relevant branches of government as well as industry; so as to allow breakthroughs to be optimally brought into policy and/or implementation.
  • recognize outstanding research and progress.

Thus, it is concluded that According to NEP‐2020, National Research Foundation (NRF) may be established to enable a culture of research to permeate through universities.

The correct word is 'allegory'. An 'allegory' is a '​story, poem, or picture that can be interpreted to reveal a hidden meaning, typically a moral or political one'.

The correct spelling of the word would be 'Narcissism'. It is the characteristic of always being engrossed in one's own self.
Example- Certain historians claim Hilter's policies to be filled with narcissism.

क्ष व्यंजन 'संयुक्त व्यंजन' का उदाहरण है।

• क्ष = क् (स्वर रहित) + ष (स्वर सहित)
• क्ष से शब्द = क्षय, कक्षा, नक्षत्र, रक्षा आदि।
• दो या दो से अधिक असमान व्यंजनों के मिलने से बनने वाले व्यंजन को संयुक्त व्यंजन कहते हैं।

उदाहरण -

• त्र = त् + र
• ज्ञ = ज्+ ञ
• श्र = श् + र

Important Pointsवर्ण के दो भेद होते हैं।

1. स्वर वर्ण
2. व्यंजन वर्ण

अघोष व सघोष व्यंजन -

अघोष

• जिन वर्णों के उच्चारण में स्वर तंत्रियों में कंपन नहीं होता है और वर्णों का उच्‍चारण करते समय केवल श्‍वास का प्रयोग किया जाता है, उन्हें अघोष वर्ण कहते हैं।
• क-वर्ग, च-वर्ग, ट-वर्ग, त-वर्ग, प-वर्ग के प्रथम और द्वितीय वर्ण अघोष वर्ण होते हैं।
• अघोष ऊष्म वर्ण - श, ष, स

सघोष

• जिन वर्णों के उच्चारण में स्वर तंत्रियों में कंपन होता है उन्हें सघोष वर्ण कहते हैं।
• क-वर्ग, च-वर्ग, ट-वर्ग, त-वर्ग, प-वर्ग के तृतीय, चतुर्थ व पंचम वर्ण सघोष वर्ण होते हैं।
• सघोष अंतःस्थ वर्ण - य, र, ल, व
• सघोष ऊष्म वर्ण- ह

अल्‍पप्राण व महाप्राण व्यंजन -

अल्‍पप्राण

• जिन वर्णों के उच्चारण में श्वास या प्राण वायु की मात्रा अल्प(कम) होती है, उन्हें अल्पप्राण वर्ण कहते हैं।
• क-वर्ग, च-वर्ग, ट-वर्ग, त-वर्ग, प-वर्ग के प्रथम, तृतीय व पंचम वर्ण अल्पप्राण वर्ण होते हैं।
• अल्‍पप्राण अंतःस्थ वर्ण - य, र, ल, व

महाप्राण

• जिन वर्गों के उच्चारण में श्वास या प्राण वायु की मात्रा अधिक होती है, उन्हें महाप्राण वर्ण कहते हैं।
• क-वर्ग, च-वर्ग, ट-वर्ग, त-वर्ग, प-वर्ग के द्वितीय व चतुर्थ वर्ण महाप्राण वर्ण होते हैं।
• महाप्राण ऊष्म वर्ण- श, ष, स, ह

'ज्ञ' वर्ण के योग से बनता है - 'ज् + ञ'

• ज् + ञ = ज्ञ
  • यह एक संयुक्त व्यंजन है।
• संयुक्त व्यंजन में जो पहला व्यंजन होता है वो हमेशा स्वर रहित होता है और इसके विपरीत दूसरा व्यंजन हमेशा स्वर सहित होता है।
• जैसे -
  • ज् - स्वर रहित
  • ञ - स्वर सहित (ञ् + अ = ञ)

Key Points

• संयुक्त व्यंजन की हिंदी वर्णमाला में कुल संख्या 4 है-
  • क्ष - क् + ष = क्ष
  • त्र - त् + र = त्र
  • ज्ञ - ज् + ञ = ज्ञ
  • श्र - श् + र = श्र

Additional Informationसंयुक्त व्यंजन:-

• जो व्यंजन 2 या 2 से अधिक व्यंजनों के मिलने से बनते हैं उन्हें संयुक्त व्यंजन कहा जाता है।
• संयुक्त व्यंजन एक तरह से व्यंजन का ही एक प्रकार है।