Bihar STET Paper 2 Chemistry Mock Test - 4 - Bihar PGT/TGT/PRT MCQ

The expression for the change in internal energy is given by,
ΔU=q+w
q = heat absorbed = 200 J
w = work done = −P x V
=−2×10⁵ × 500×10⁻⁶
= −100 N - m
ΔU=200−100J= 100 J
Hence, the correct option is C.

Clemmensen reduction is suitable for reductio n of carbonyls containing additional acidic functional group.

Carbon has 4 electron in its outermost shell. So it is difficult to loose electrons or gain electrons. That's why carbon forms covalent bond by sharing of electrons.

Cimetidine,zantac and ranitidine are antacids as they control the root cause of acidity These drugs prevent the interaction of histamine with the receptors present in the stomach walls Consequently there is a decrease in the amount of acid release by the stomach 

Correct Answer :- D

Explanation :

Aggregation of colloidal particles into insoluble precipitate by addition of some suitable electrolyte is called coagulation.

Anti – histamines stop allergic reactions by competing with histamine for binding sites of histamine receptor.

The correct answer is option A
Compare straight line equation
(y = mx + c) with Kt = -log (Ct) + log(C0)
where,
K being constant,
"t" is equivalent to "y" in straight line equation
(-1) is slope for equation which is "m" in straight line equation
log (Ct) is x-component
& log (C0) is y-intercept.
 

For second order reaction half life is inversely related to concentration of reactant.

The correct answer is option B
Given,
λCo(NH3)4Cl2+=50       λClo-4 =70
λ∞= λCo(NH3)4Cl2+  + λClo-4
λ∞= 50             + 70
λ∞=120
(x) Cell constant = 1/A
0.02 = l/A
Resistance(R)   =33.5Ω
K =c.x              (x = is cell constant)

S  =49.7 mol/L

For radius r,
circumference of the orbit = 2πr_n

Number of waves in one complete revolution = nλ
For third orbit = nλ = 3λ
Thus, three waves are formed in one revolution. 

100g H₃P0₄ aqueous solution has 34g H₃P0₄

(B) & (C) compounds are R-configuration.

[Ni⁰(CO)₄]
[Cr³⁺(NH₃)₂][Ni⁴⁺F₆]₃
[Ni²⁺(NH₃)₂][B⁺³F₄]₂
K₄[Ni⁺²(CN)₆]

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.

THE STRUCTURE OF ALLENE IS AS FOLLOW;
CH₂=C=CH₂
We see that there are 2 sp² hybridised carbon atoms at the extreme of the chain. While the middle carbon atom  is sp hybridised.

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.

C₅H₅⁻a negative ligand.

Thus, AS behaves as a non-electrolyte at the freezing point of solution (remains non-ionised).

Mastery over the subject matter is one of the very essential factors of a teacher that affect the process of learning. 

The stage of the embryo which nearly resembles a human being is called a fetus. Learning starts at fetal stage when a child starts reacting to different stimuli, as the sense organs are developed by this time.
The fetal nervous system starts developing very early in pregnancy. The main subdivisions of the brain are, in a basic form, visible at five gestational weeks. At about gestational weeks 25-29, the fetus is even able to hear internal (e.g. from the maternal gastrointestinal system) and external sounds. So, obviously the fetus gets a vague idea from the external environment through its senses, far before birth. Some studies even demonstrate that fetal heart rate patterns change distinctively, depending on whether the unborn child is exposed to the maternal voice or another female voice.

In explore learning phase, the students investigate the topic more thoroughly. They need not be over-directed and need to find their way to the materials. They will need some direction and the teacher can circulate, asking important questions, listening to their interactions, and ensuring that they remain on task.
The 6 E's and S (Engage, Explore, Explain, Elaborate, Evaluate, Extend, and Standards) lesson plan format was developed by teachers, in consultation with faculty from schools of education, and is based on a constructivist model of teaching. The lesson plans are based on constructivist instructional models, with activities and sections of the plan designed to have the students continually add (or construct) new knowledge on top of existing knowledge.

Government of India and ADB have signed a $23 million loan agreement to strengthen the fintech ecosystem in India. Under this, an International Fintech Institute (IFI) will be established to strengthen fintech education, boost start-up success rate and promote fintech research and innovation.

The correct answer is Option(3).i.e.Tamil Nadu.

Key Points:

• The state has the highest rainfall by North-East monsoon in Tamil Nadu. 
• Nort-East Monsoon: 
  • The north-east monsoon, generally known as a monsoon of winter which blows from the land towards the sea and south-west monsoon is just the opposite, known as a monsoon of summer which blows from sea to land.
  • The North-East monsoon usually occurs within October to March, although it may change every year. 

 North-east monsoons are called as retreating monsoons. 

⇒ (2/1000) × (5/10)

⇒ (10/10000)

⇒ (1/1000) = 0.001

∴ 0.002 x 0.5 = 0.001

Solve this question using the values given in the options. Option (d) can be seen to fit the situation
given by the problem as it gives us the following chain of thought:
If the average speed of the faster train is 48 kmph, the average speed of the slower train would be
32 kmph. In this case, the time taken by the faster train (192/48 = 4 hours) is 2 hours lesser than
the time taken by the slower train (192/32 = 6 hours). This satisfies the condition given in the
problem and hence option (d) is correct.