Bihar PGT Chemistry Mock Test - 1 - Bihar PGT/TGT/PRT MCQ

Atheist' is a person who strongly disbelieves in the existence of God. Option 3 is thus the correct answer.
All other alternatives have no relation to the given phrase. Stubborn stands for a person who is adamant, bogus is something that is not to be taken seriously and devout is a person who believes in God strongly.

The sentence means that the person in concern changed his lifestyle completely after serving his prison sentence. "Turned over a new leaf" is a phrase that is used to depict a new beginning to something.
Thus, the sentence is correct in its original form and option 4 is correct.

The correct option is Option 4, i.e., ‘The letter was posted by Alice.’
The sentence is in the simple past tense in the active voice, and as such, has to remain in the simple past tense when being converted to passive voice. Therefore, the correct answer is Option 4.

पाश के समानार्थी शब्द बन्धन, जाल, फंदा आदि हैं।

पास के समानार्थी शब्द तरफ, दिशा, निकटता, निकट, समीप, नजदीक, करीब, आस-पास आदि हैं।

विद्यापति के काव्य का रूप (काव्यरूप) प्रबंध प्रकार का है। इनकी तीनों महत्त्वपूर्ण रचनाएँ खंडकाव्य प्रकृति की हैं। भाषा के स्तर पर देखें तो विद्यापति के यहाँ भाषायी विविधता दिखाई देती है। कीर्तिलता की रचना अवहट्ट में हुई है, वहीं पदावली की रचना मैथिली भाषा में की गई है।

The correct answer is Soviet Union.

• The battle of Stalingrad held between the Soviet Union and Germany.
• The Soviet Union won the battle against Germany.
• The German army raced across the Russian plains, inflicting terrible casualties on the Red Army and the Soviet population.
• The Battle of Stalingrad was a brutal military campaign between Russian forces and  Nazi Germany and the Axis powers during World War II.
• February 1943, Russian troops had retaken Stalingrad and captured nearly 100,000 German soldiers, though pockets of resistance continued to fight in the city until early March.

Additional Information

• The capture of Stalingrad was important to Hitler for two primary reasons:
  • ​It was a major industrial city on the Volga River.
  • Its capture would secure the left flank of the German armies as they advanced into the oil-rich Caucasus region with the goal of cutting off fuel to Stalin’s war machine.
• The Soviet generals Aleksandr Vasilyevskiy and Georgy Zhukov, responsible for planning in the Stalingrad area, concentrated massive Soviet forces in the steppes to the north and south of the city.

The logic follows here is :-

From the given words we can understand that it is a process of construction or a materials.

Planning → Designing → Implementation → Manufacturing → Production 

So, logical and meaningful order is 4 - 1 - 5 - 2 - 3

Thus, the correct answer is "4 - 1 - 5 - 2 - 3".

The correct answer is Liver.

Key Points

• Excessive consumption of alcoholic drinks causes damage to the Liver.
  • Alcohol is readily absorbed from the digestive tract, and up to 98% is metabolised in the liver.
  • Each liver cell contains three pathways for alcohol metabolism.
  • All of these result in the production of a highly toxic metabolite which can contribute to liver cell damage.
  • With regular alcohol use, the regenerative ability of liver cells may be inhibited and lead to sustained liver damage.
  • Long term heavy alcohol use may lead to fat accumulation in the liver, which may progress to alcoholic hepatitis, or liver cirrhosis.
  • Over time, excessive alcohol use can lead to the development of chronic diseases and other serious problems including -
    • High blood pressure, heart disease, stroke, liver disease, and digestive problems. 

Additional Information

• Kidney:
  • Healthy kidneys remove wastes and extra fluid from your blood.
  • But when your kidneys fail, wastes and extra fluid can build up in your blood and make you feel sick. 
  • Kidneys can become damaged from a physical injury or a disease like diabetes, high blood pressure, or other disorders.
  • High blood pressure and diabetes are the two most common causes of kidney failure.
  • Kidney failure does not happen overnight.
• Lungs:
  • Chronic alcohol abuse and heavy drinking can greatly increase the risk of several pulmonary conditions.
    • including lung disease, alcoholic pneumonia, acute lung injury, and acute respiratory distress syndrome.
  • Smokers are more likely than nonsmokers to develop heart disease, stroke, and lung cancer.
    • Smoking can cause lung disease by damaging your airways and the small air sacs (alveoli) found in your lungs.
    • Lung diseases caused by smoking include COPD, which includes emphysema and chronic bronchitis.
• Heart:
  • Smokers are at greater risk for diseases that affect the heart and blood vessels.
  • Increases in your blood pressure can also be caused by weight gain from excessive drinking.
  • Heavy drinking weakens the heart muscle, which means the heart can't pump blood as efficiently.
    • It's is known as cardiomyopathy and can cause death, usually through heart failure.

The correct answer is 23 March.

Key Points

• On this day, the World Meteorological Organization (WMO) was established in the year 1950. 
• WMO is headquartered in Geneva, Switzerland.
• The International Meteorological Organization (IMO), whose concept dates back to the Vienna International Meteorological Congress of 1873, gave birth to the organisation.
• The theme for 2022 is 'Early Warning and Early Action.

Additional Information​ 

• List of Important Days/Events in March:​ 

In preference to reduction of Zn²⁺ at cathode, O^2- (aq) is oxidised to O₂ at anode.

100mLof 0.01 M CaCI₂ = 100 x 0.01 millimoles CaCI₂
= 0.001 mole CaCI₂
= 0.001 x 111 g CaCI₂
= 0.111 g pure CaCI₂
But, residue = 0.15 g
Thus, impurity = 0.15 - 0.111= 0.039 g

various oxides of sulphur, nitrogen, carbon, halogens causes Tropospheric pollution

The number of optically active isomers = 2ⁿ⁻¹−2^{n−1/2 ​}=2³⁻¹−2^3−1/2 ​=2.

In solid state, N₂O₅ exists as nitronium nitrate 
In   nitrogen is sp and in  , nitrogen is sp².

conc. of N₂O₄ = 4.8 × 10^–2 mol/lit
NO₂ = 1.2 × 10^–2 mol/lit

Sum of number of neutrons and protons represents mass number. Tritium has 1 proton and 2 neutrons. 

[Co(NH₃)₄CI₂]⁺ exhibits geometrical isomerism.
cis-[Co(en)₂CI₂]⁺ because of the absence of symmetry elements exhibit optical isomerism.
[Co(NH₃)₅(NO₂)]CI₂ because of the presence of ambidentate (NO₂) ligand exhibit linkage isomerism. [Co(NH₃)₆][Cr(CN₎6] exhibits coordination isomerism because here, cation and anion both are complex.

(i) → (s), (ii) →(p), (iii) → (t), (iv) → (r)

−NO₂ group is reduced to –NH₂ using H₂/Pd.

Because isotones means the same number of neutron, So, from the question, option c is right, number of neutron in k is,39-19= 20,and,the number of neutron in ca is also 40-20=20 so it is isotones. 

(C—H) bond lengths are different from (B—H) and (N—H) bond lengths. Both are planar.

Cl show different oxidation state as -1 to +7 due to vacant d orbital.

As oxygen is more electronegative than Cl.

Oxygen size is small hence its more electronegative and show -2 oxidation states.

2x + 7 (-2) = 0

x = +7

Reducing agents reduce others by oxidizing itself. Elements which lose electron become oxidize and reduce other elements by donating electron.

(d) CsCI has bcc structure.
Closest dista nce between Cs⁺ and Cl^- is the sum of radii of Cs⁺ and CI^- = 169 + 181 = 350 pm

Cubic diagonal = √3 a

Closest distance is one-half of the cubic diagonal

The correct answer is Option D.

From the rate equation rate =k[A][B], we can say that the reaction is first order in A and first order in B. Hence, the overall order of the reaction is 2.
(A)The unit of k must be mol-1s-1
Hence, the statement A is incorrect.
(B) The half life period is not constant. It is inversely proportional to the concentration of reactants. Hence, the statement B is incorrect.
(C) The rate of formation of C is one half the rate of disappearance of A.
 d[C] / dt = −d[A] / 2dt
Hence, the statement C is incorrect.
(D) The value of k is independent of the initial concentration of A and B. Hence, the statement D is correct.

 (a) van’t Hoff factor (i) = [1 + (n - 1)α] where, n = number of ions from one mole of solute

α = degree of ionisation/association 

∆H_{neutralisation} =  ∆H_H⁺ _{+ OH}- + ∆_rHionisation 
-5.1 = -57.3 + ∆H_ionisation
∆H_ionisation = 52.2 kJ mol^-1

Macromolecule is made by joining smaller molecules(monomers)by covalent bond formation.

∆x*∆mv=h/4π

Explanation: The atom which defines the structure of a family of organic compounds and their properties is called a functional group. Functional groups are specific groups of atoms or bonds within molecules that are responsible for the characteristic chemical reactions of those molecules.