Bihar PGT Chemistry Mock Test - 4 - Bihar PGT/TGT/PRT MCQ

To 'bury the hatchet' is to 'end a fight'. Therefore, the correct meaning is 'make peace'.

"कवि: नृप धनं याचते" वाक्य का हिंदी अनुवाद है" कवि राजा से धन मांगता है"I

यहां " दुह्याच्पच्दण्ड" संज्ञा अर्थनिबंधना से "अकथितं च" सूत्र से याच् धातु के कारण नृप में कर्म संज्ञा होकर द्वितीया विभक्ति होती है ।

अकथित कारक — दुह्, याच्, पच्, दण्ड्, रुध्, प्रच्छ्, चि, ब्रू, शास्, जि, मथ्, मुष्, नी, हृ, कृष्, और वह् —16 धातुओं के साथ 'कर्म' का योग होने पर, अपादान आदि कारक अकथित हो जाते है। इस अकथित कारक की कर्म संज्ञा हो जाती है I

अत: विकल्प (A) सही है I

माघ राजस्थान के प्राचीनतम वह श्रेष्ठतम संस्कृत कवि है इनका जन्म राजस्थान के भीनमाल जालौर में हुआ था।

इनके पितामह सुप्रभदेव गुजरात के राजा वर्मलात के महामंत्री थे।

अत: विकल्प (C) सही है I

Let CP of the article be Rs. 100

⇒ SP of the article = 100 × 180/100 = Rs. 180

New cost price = 100 × 120/100 = Rs. 120

⇒ New profit = 180 – 120 = 60

Profit percentage = 60/120 × 100 = 50%

Hence, the above image is the correct answer.

The correct answer is Earth.

Key Points

• From the sun, it is the third planet.
• Life existed only on this planet.
• Around 4.5 billion years ago, the earth was formed.
• Inside the solar system, the earth is a rocky planet.
• Earth moves around the sun due to the large mass of the sun.
• In space, the earth also turns around.
• At different times, a different part of the earth is faced by the sun.
• A large amount of liquid water is found only on the earth.
• Water covers around 74 percent area of the earth.
• From different places, the earth's water came.
• Of all the rocky planets, the earth is the largest.
• As compared to Jupiter, it is very small.

Hence, the Earth is known as a blue planet.

Concept:

The nucleus of the Cell

• The cell is the basic building block of all living beings. 
• The nucleus is the special structure located generally at the center of the cell. 
• The nuclear membrane separates the cytoplasm from the nucleus. 
• The nucleus contains a central part called nucleolus and chromosomes. 
• Chromosomes and nucleolus coexist in the nucleus. Chromosomes are not present in the nucleolus.

Chromosomes and Genes

• Chromosomes carry genes and help in the inheritance or transfer of characters from the parents to their children. 
• The chromosomes can be seen only when the cell divides.
• The credit for the discovery of chromosomes goes to Strasburger as he first described the chromosome structure seen in the nucleus during cell division.
• Usually, chromosomes are rod-shaped, elongated, or dot-like in shape with sizes varying from 0.5 to 32 micrometer.
• In humans, 23pairs of chromosomes are found i.e. 46 in numbers.

Conclusion:

• Chromosomes are present in the nucleus of the cell. So, all the given options are wrong. 
• The correct option is None of these.

Additional Information

• The cell membrane is also known as the plasma membrane. 
  • It is a porous structure that allows the exit and entry of certain materials according to its requirement. 
  • This is the major function of the cell membrane. 
• The cytoplasm is between the cell and the nucleus.
  • Cell organelles like mitochondria, Golgi bodies, ribosomes, etc. are present in the cytoplasm. 
  • Mitochondria is called the powerhouse of cells and is responsible for cellular respiration. 
  • vacuole is open space between cell which is used for storing food. 
• Plastids are double-membrane organelles found in the plant cell. They contain pigments that help the plant in photosynthesis. 

The correct answer is Todar Mal.

• As Akbar's finance minister, Raja Todar Mal has implemented a new revenue system called zabt, and a tax system called dahshala.
  • He took a careful survey of crop yields and cultivated prices for a ten-year 1570–1580 era. 
  • On this basis, the tax has been set in cash on each harvest.
  • Each province was divided into income circles with its own tax rates and an individual crop schedule.
  • There was a prevalence of this method where the Mughal administration could survey the land and keep careful records.

Important Points 

• The Akbar territory was divided into 15 Subahs for the revenue system, further subdivided into a total of 187 Sarkars across 15 subahs, and those 197 sarkars (sirkar) were subdivided into a total of 3367 Mahals or Pargana.

The correct answer is Rigveda.

Key Points

• There are four Vedas- 

1. Rigveda 
2. Samaveda
3. Yajurveda
4. Atharvaveda

• Out of these four Vedas, Rigveda is the oldest Veda.
• Rigveda includes more than a thousand hymns called sukta.
• These hymns are written in the praise of gods and goddesses and composed by sages.
• The three most important gods were:

1. Agni, the god of fire
2. Indra, a warrior god
3. Soma, in the Vedas, particularly in the Rigveda, Soma is an important deity. He represents the divine embodiment of the Soma plant and the drink derived from it. He is often described as the divine intoxicant, a provider of inspiration, and as a symbol of immortality.

 Thus, we can say that Rigveda is the oldest veda.

The correct answer is Ethanol + Methanol​.

• Ethanol + Methanol​ is denatured alcohol.
• Denatured alcohol is ethanol that has additives to make it poisonous, bad-tasting, foul-smelling, or nauseating to discourage its recreational consumption.
• The term denatured alcohol refers to alcohol products adulterated with toxic and/or bad tasting additives (e.g., methanol, benzene, pyridine, castor oil, gasoline, isopropyl alcohol, and acetone), making it unsuitable for human consumption.
• The most common additive used is methanol (5–10%), giving rise to the term methylated spirits. Denatured alcohol is used as a lower-cost solvent or fuel for home-scale or industrial use.

Key Points

• Denatured alcohol is ethanol or grain alcohol that contains additional chemicals called denaturants that make it unfit for human consumption.
• Denatured alcohol is fine for some types of lab work and as an ingredient in certain products, but it's not safe to drink.
• Ethanol is an organic chemical compound. It is simple alcohol with the chemical formula C₂H₆O.
• Its formula can be also written as CH₃−CH₂−OH or C₂H₅OH and is often abbreviated as EtOH.

Additional Information

• Alcohol (ethanol or ethyl alcohol) is the ingredient found in beer, wine, and spirits that causes drunkenness.
• Alcohol is formed when yeast ferments (breaks down without oxygen) the sugars in different food. 

Key Points 

• The biosphere reserves are the areas meant for the conservation of biodiversity.
• These are large areas of protected land for the conservation of wildlife, plant and animal resources and traditional life of the tribals living in the area.
• The biosphere reserves help to maintain the biodiversity and culture of that area.
• A biosphere reserve may also contain other protected areas.
• The Pachmarhi Biosphere Reserve consists of one national park named Satpura and two wildlife sanctuaries named Bori and Pachmarhi

Additional Information

• There are18 biosphere reserves in India:-
  • Cold Desert, Himachal Pradesh
  • Nanda Devi, Uttrakhand
  • Khangchendzonga, Sikkim
  • Dehang-Debang, Arunachal Pradesh
  • Manas, Assam
  • Dibru-Saikhowa, Assam
  • Nokrek, Meghalaya
  • Panna, Madhya Pradesh
  • Pachmarhi, Madhya Pradesh
  • Achanakmar-Amarkantak, Madhya Pradesh-Chhattisgarh
  • Kachchh, Gujarat
  • Similipal, Odisha
  • Sundarban, West Bengal
  • Seshachalam, Andhra Pradesh
  • Agasthyamala, Karnataka-Tamil Nadu-Kerala
  • Nilgiri, Tamil Nadu-Kerala 
  • Gulf of Mannar, Tamil Nadu
  • Great Nicobar, Andaman & Nicobar Island

By using the symbols in the table given below, we can draw the following family tree:

Clearly, C is the grandchild of A.

Hence, ‘Grandchild’ is the correct answer.

The logic followed here is:

The place value of A is 1, D is 4, O is 15 and U is 21. 

In each of the given figure the alphabet and its place value are given except  U and 23 in figure D.

Hence, figure D is the odd one from the given figures.

Unnilquadium is a combination of un, nil, and quad i.e. 1, 0 and 4 as per IUPAC nomenclature. Its symbol is formed by joining the first letters. So combining u from uni, n from nil and q from quad, we get Unq.

Zn + NaOH → Na₂ZnO₂ + H₂
Amphoteric
Nz + dil H₂SO₄ → ZnSO₄ + H₂

Rate of reaction is determined by slowest step.

Peptide bonds are formed by a biochemical reaction that extracts a water molecule as it joins the amino group of one amino acid to the carboxyl group of a neighboring amino acid.

With strong base C₂H₅ONa, reaction proceeds by E2 mechanism. Since, there is no H in the anti position at tertiary β-carbon, deprotonation occur from secondary β-carbon giving 2-menthene as the major product. On the other hand, with weak base, reaction proceeds by E1 mechanism and the most stable tertiary carbocation formed, gives the major product 3-menthene.

The correct answer is Option A.
Aromatic Primary amine will form the most stable diazonium salt because it releases water when it reacts with nitronium ions. If aliphatic primary amine reacts with nitrosonium ion it Also releases water but in this case water reacts with alkyl diazonium salt and it forms alcohol while benzene diazonium salt does not react with water at this temperature.

DNA differs from RNA because DNA has deoxyribose sugar while RNA has ribose sugar. DNA has thymine as pyrimidine while, in RNA thymine is replaced by uracil.So, the correct answer is 'In the nature of sugar and pyrimidines'

Bromination in the presence of light is done by free radical mechanism. The radical on the carbon chain is formed where the radical is most stable. We can’t put radical on the ring as the aromaticity of the ring will be lost. So, it should be put either on the CH₃. However, the CH₃ which is attached to NO₂ ring will not bear stable radical as NO will decrease the stability of radical.(NO₂ is an electron withdrawing group). So the only position is the other CH₃ in option d. There also we have stability due to resonance.

[Co(NH₃)₄Br₂]CI can show both geometrical and ionisation isomerism.

[Co(NH₃)₄Br₂]CI or [Co(NH₃)₄BrCI]Br

The correct answer is Option D.

 About 75% of the elements on the periodic table are metals. The only groups that are not metals are the noble gases, halogens, and the group actually called nonmetals.