EMRS PGT Chemistry Mock Test - 2 - EMRS MCQ

The correct answer is Mawsynram.

Key Points

• The highest rainfall in India and the world is recorded at Mawsynram village of Meghalaya.
• It is also known as the land of clouds.
• Mawsynram is a village located in the East Khasi Hills in the district of Meghalaya state in northeastern India, which is 65 kilometres from Shillong.
• Mawsynram receives approximately 11,872 millimetres of rain in an average year.
• The main majority of rains is during the monsoon season.
• Basically, due to the high altitude, it rarely gets truly hot in Mawsynram.
• 14,234 mm is the recorded rainfall in the year 2010.
• According to the Guinness Book of World Records, Mawsynram received 26,000 millimetres (1,000 in) of rainfall in 1985.

Additional Information 

• The second rainiest place is Cherrapunji, which is also located in Meghalaya.
• Here the average annual rainfall is around 11,430 mm (450 in) per year.
• India is a vast country in geographical terms, with various regions experiences very different climatic conditions.
• This is also reflected in the distribution of rainfall in India. Some regions experience very high rainfall and others receive very scanty rainfall.
• The difference between the recorded highest and lowest rainfall in India is approximately 1178 cm.

Hence, the data is inadequate.

The Logic followed here is:

The third number = The First number × (second number ÷ 2)

In Row 1:- 10, 4, 20

The third number = 10 × (4 ÷ 2)

= 10 × 2 = 20

In Row 2:- 15, 8, 60

The third number = 15 × (8 ÷ 2)

= 15 × 4 = 60

Similarly,

In Row 3:- 25, 8, ?

The third number = 25 × (8 ÷ 2)

? = 25 × 4 = 100

Hence, the correct answer is "100".

Additional Information 

The most common pattern asked in exams are based on:

• It could be the sum of two numbers divided by a constant
• It could be the average of numbers.
• It could be in the form of alphabets, where alphabets are increased by constant or increased by the square of numbers or increased by prime numbers.
• It could be the difference of product of two diametrically opposite numbers.
• It could be the difference in the sum of adjacent numbers.
• The difference of the numbers could be in the pattern 13 ± 1, 23 ± 1,  and so on.
• The difference of the numbers could be in the pattern 12 ± 1, 22 ± 1, and so on.
• Numbers could be 12, 22, 32, and so on or 13, 23, 33, and so on.
• The difference could be prime numbers or the difference could be the square of prime numbers.
• The difference could be in the form of N2 ± N or N3 ± N.
• The difference could be in the form of ×N + N or ×2 + 1, ×2 + 2, ×2 + 3, and so on.
• The difference could be in the form of ×2 ± 1 alternatively.
• Numbers could be ×1, ×2, ×3, and so on. 

Four friends W, X, Y and Z are students of Class 10th.

i) W and X are good in Hindi but poor in English.

ii) W and Y are good in Science but poor in Mathematics.

iii) Y and Z are good in English but poor in Social Studies.

iv) Z and X are good in Mathematics as well as in Science.

Thus we can see Z is good in English, Mathematics, and Science but poor in Social Studies.

Hence, the correct answer is "Z".

Key Points

• ICT has also become integral to the teaching-learning interaction, through such approaches as replacing chalkboards with interactive digital whiteboards, using students’ own smartphones or other devices for learning during class time, and the “flipped classroom” model where students watch lectures at home on the computer and use classroom time for more interactive exercises.
• Teachers need specific professional development opportunities in order to increase their ability to use ICT for formative learning assessments, individualized instruction, accessing online resources, and fostering student interaction and collaboration.
• In many ways, ICT has become a part of children's everyday lives, even in preschools. The computer has now become a common tool for the education of preschool children because when used appropriately, it can reinforce their learning experiences.

It can be concluded that clear instructions are important in ICT-supported teaching-learning strategies.

Information and Communication Technology(ICT) is defined as a diverse set of technological tools and resources used to communicate, create, disseminate, store, and manage information.

Key Points

Role of ICT in Learning:

• ICT promotes the learner-centric curriculum approach by supporting the learners' needs and capabilities while promoting creative and critical thinking. 
• It fulfills the gaps between teaching and learning by promoting modern approaches such as multi-sensory learning that engages more than one sense at a time.
• The lessons can be presented to the students in a variety of methods that will best engage them in the material and excite their brains and ultimately enhances their teaching-learning experience.
• Information and communication technologies (ICT), when made accessible and available, enable children with disabilities to fully and effectively engage, on an equal basis, in all facets of society and development.
• It allows students and teachers to access information (books, articles, blogs, etc.). Students can learn about their subjects by watching videos, pictures, and listening to audio content.

Hence, it is clear that the role of ICT as a support and learning school management does not include the traditional approach through the medium of ICT.

Child who faces difficulties in teaching-learning process is considered as a child with learning disability. Dyscalculic students cannot understand mathematical concepts like number and its relations, operations, symbols, place value etc. Students with visual perceptual or motor disability have problems with remembering places and often forget one's own place. Dyslexic students have problems not only with reading but also with comprehension and understanding and hence, repeatedly ask questions. Hence, (A) is true, but (R) is false.

Useful strategies for teaching students with mental retardation include the following:

• Teach one concept or activity component at a time
• Teach one step at a time to help support memorisation and sequencing
• Teach students in small groups, or one-on-one if possible
• Always provide multiple opportunities to practice skills in a number of different settings
• Use physical and verbal prompting to guide correct responses, and provide specific verbal praise to reinforce these responses

Summative assessment (or summative evaluation) refers to the assessment of participants where the focus is on the outcome of a programme. This contrasts with formative assessment, which summarises the participants' development at a particular time.

• Autoxidation is any oxidation that occurs in presence of oxygen.
• The term is usually used to describe the degradation of organic compounds in air (as a source of oxygen).
• Autoxidation produces hydroperoxides and cyclic organic peroxides.

18 MH₂SO₄ means18 mol L^-1.
1000 mL of H₂S0₄ solution has H₂SO₄ = 18 mol
= 18 x98g
Also, 1000 m L = 1000 x 1.8 g H₂SO₄ solution
Thus, (1000 x 1.8)g H₂SO₄ solution has H₂SO₄ =18 x 98 g

The rows of the periodic table are called periods, while the columns of the table are called groups.

In this question l=3 means the sub shell is f & n=4 means it is present in 4^th orbit.
Finally it is a 4f sub shell.
The no of orbital in f sub shell =2l+1
                                                = 2*3+1
                                                =7
Each orbital can accommodate 2 electrons.
  7*2 = 14 electrons.

Maximum number of electrons in a sub shell with l=3& n=4 (4f) is 14electrons.

A small and highly electronegativity elements form a stronger hydrogen bond. The order of size of N , O and F is F < O < N .and so the order of strength of hydrogen bond is F > O > N.

Hence, electronegativity of F is the highest, therefore magnitude of positive charge on hydrogen and negative charge on F is the highest in HF and Hence, electrostatic attraction of H bonding is the strongest in HF.

Hydration energy ∞ polarising power
Na⁺ < Mg²⁺ < Mg³⁺ < Be³⁺ < Al³⁺

P₄ has six P-P single bonds and four lone pair of electrons.
Ratio: 6/4 = 3/2 i.e. 3:2

Oxidation Numbers in Oxygen Difluoride (OF₂) and Dioxygen Difluoride (O₂F₂)

Oxidation numbers are assigned to elements in compounds according to several rules. Here, we'll use the rule that states the oxidation number of fluorine (F) in a compound is always -1, and the rule that states the sum of oxidation numbers of all atoms in a compound is 0.

Oxidation Number in OF₂:

• In Oxygen Difluoride (OF₂), there are two fluorine atoms, each with an oxidation number of -1. So, the total oxidation number contributed by fluorine is -2.
• To mak e the total oxidation number 0, the oxygen atom must have an oxidation number of +2.

Oxidation Number in O₂F₂:

• In Dioxygen Difluoride (O₂F₂), there are two fluorine atoms, each with an oxidation number of -1. So, the total oxidation number contributed by fluorine is -2.
• There are also two oxygen atoms. To make the total oxidation number 0, the combined oxidation number of the two oxygen atoms must be +2.
• Therefore, the oxidation number of each oxygen atom in O₂F₂ is +1 (because +2 divided by 2 equals +1).

So, in OF₂ and O₂F₂, the oxygen is assigned an oxidation number of +2 and +1, respectively. Therefore, the correct answer is B: +2 and +1.

Photochemical reaction between H₂ and Cl₂ is 0 zero wrt to reactants.

The bond pair of electrons is shared by two atoms whereas the lone pair of electrons is only under the influence of central atom.

So the electron cloud of lone pair occupies more space as compared to the bond pair.

This causes greater repulsion between the lone pairs as compared to lone pair-bond pair and bond pair-bond pair interactions.

Octahedral complexes of formula [Ma₄b₂] in which the two ligands b may be oriented cis or trans to each other, e.g.

Geometrical isomers (cis and trans) of [Co(NH₃)₄CI₂]⁺.

In S_N1 reaction, some of the substrate, even after ionisation, remains associated as an intimate ion pair preventing nucleophilic attacks from front side and gives inverted product.

Due to partial reaction of nucleophile with intimate ion pair, net inversion of configuration is observed although predominant reaction occurs at planar carbocation giving racemic products.

The time taken for half the reaction to complete, i.e., the time in which the concentration of a reactant is reduced to half of its original value is called half-life period of the reaction. But it is impossible to perform 100% of the reaction. Whole of the substance never reacts because in every half-life, 50% of the substance reacts. Hence, time taken for 100% completion of a reaction is infinite. 

The correct answer is option D
For Na₂​SO₄ ​: −i = n
Na₂​SO₄ ​⟶ 2Na⁺ + SO₄²⁻​​
                         n=2
i=1−α+nα
i=1−α+2α
i=1+2α

Melting point increases with halogens from fluorine to iodine because van der Waals’ forces are stronger down the groups.

White P is an allotrope of phosphorus with low ignition temperature.

National Education Policy (July 29, 2020) was finalized after reviewing the suggestions Kasturirangan committee, its vision is to develop a Bharat-centric knowledge society. A society that has its roots in eternal Bhartiya Sanskriti and looking forward to moving with the world. 

Key Points The NEP 2020 stipulated that the three-language formula would be maintained while keeping in mind the Constitution, the aspirations of the people, regions, and the Union, and the necessity to encourage multilingualism as well as national unity.

• It stipulates that the three-language formula would be more flexible, that no language will be imposed on any state, and that one of its key priorities will be the promotion of regional languages.
• In light of the foregoing, the Rajasthan State Council of Educational Research and Training (RSCERT) developed a new curriculum that includes three languages: Hindi, English, and the local dialect/ languages.
• The central government recognizes 18 dialects from the state of Rajasthan, hence the state government has the authority to choose any of these 18 dialects in different regions.

Thus, it can be inferred that as per the NEP 2020, the Rajasthan government has decided to come up with a new syllabus that includes 3 languages, which are Hindi, English, and local languages.

The sentence in concern states that superistitions are still prevalent in our country and people blindly follow them. "Blind faith" is a phrase that stands for showing a faith without any rationality. The sentence is thus correct in its original format and no improvement to it is required. 
Option 4 is hence correct.

Rumble means a heavy sound that reverberates. Roar is the only option that is quite similar in meaning. Thus, option 4 is correct.
Example- The roar of the ocean could be heard before the cyclone struck.

The passage says that the group of boys went out for a movie on Friday night. They were catching up after a long time. The friendship they had seemed to remain intact though. After going to the movie, the boys went for dinner too.
This sequence of events is shown only by option 3. Hence, it is the correct answer.