All questions of September Week 2 for NEET Exam

• A:

  11.2 x 2^1/4 km/s

• B:

  22.4 km/s

• C:

  11.2 x 2^1/2 km/s

• D:

  11.2 km/s

The answer is d.

• a)
  Crossing over
• b)
  Synapsis
• c)
  Both 1 and 2 above
• d)
  None of the above

• a)
  Addition of genetic material
• b)
  Deletion of genetic material
• c)
  Exchange of genetic material
• d)
  All of the above

• a)
  Production of gametes
• b)
  Reduction in Chromosome number
• c)
  Introduction of variation
• d)
  All of the above

• a)
  the minimum speed of an object to reach a height equal to the radius of the planet
• b)
  cannot be defined
• c)
  the minimum speed required for an object to reach infinity
• d)
  the maximum speed required for an object to reach infinity

Match List I and List II, and select the correct answer.

• a)
  1, 2 and 3 are correct.
• b)
  1 and 3 are correct.
• c)
  2 and 4 are correct.
• d)
  Only 1 is correct.

Standard entropies of X₂, Y₂ and XY₃ are given below the reaction

Q. At what temperature, reaction would be in equilibrium? 

• a)
  500 K
• b)
  750 K
• c)
  1000 K
• d)
  1250 K

• a)
  velocity ≥ (2GM/ R)^1/2
• b)
  a great velocity but nothing more can be said
• c)
  velocity >(2GM)^1/2/ R necessarily
• d)
  only the velocity = (2GM)^1/2/R

• a)
  11.2km/s
• b)
  2.4km/s
• c)
  24km/s
• d)
  10km/s

• a)
  Diakinesis
• b)
  Pachytene

   
• c)
  Leptotene
• d)
  Zygotene

• a)
  Meiotic prophase
• b)
  Mitotic prophase
• c)
  Meiotic metaphase
• d)
  Mitotic telophase

• a)
  Diakinesis
• b)
  Zygotene
• c)
  Diplotene
• d)
  Pachytene

• a)
  potential energy multiplied by the mass of the object
• b)
  potential energy of the mass placed at that point
• c)
  numerically equal to the potential energy
• d)
  potential energy of a unit mass at that point.

• a)
  negative, scalar quantity , unit JKg^-1
• b)
  positive, vector quantity , unit JKg^-1
• c)
  positive, scalar quantity , unit JKg^-1
• d)
  negative, vector quantity , unit JKg^-1

Which reaction, with the following values of ΔH and ΔS at 400 K is spontaneous and endothermic?

 

• a)
  a
• b)
  b
• c)
  c
• d)
  d

• a)
  tangential
• b)
  centrifugal
• c)
  centripetal
• d)
  fictitious

The value of log₁₀ K for a reaction, A B is (Given, ΔH°₂₉₈ = - 54.07 kJ mol^-1;

ΔS°₂₉₈ = + 10 JK^-1 mol^-1; R = 8.314 JK^-1 mol^-1 2.303 x 8.314 x 298 = 5705) 

[IITJEE2007]

• a)
  5
• b)
  10
• c)
  95
• d)
  100

• a)
  2.331x 10² cm/s
• b)
  2.331x 10³ m/s
• c)
  2.331x 10⁴ cm/s
• d)
  2.331x 10³ cm/s

• a)
  gravitational potential energy
• b)
  centripetal acceleration
• c)
  gravitationl force
• d)
  linear orbital speed

• a)
  The minimum velocity with which the body has to be projected vertically upwards from the surface of the earth so that it crosses the gravitational field of earth and never returns back on its own.
• b)
  The minimum velocity with which the body has to be projected vertically upwards from the surface of the earth so that it crosses the gravitational field of earth and returns back
• c)
  The maximum velocity with which the body has to be projected vertically upwards from the surface of the earth so that it crosses the gravitational field of earth and returns back.
• d)
  The maximum velocity with which the body has to be projected vertically upwards from the surface of the earth so that it crosses the gravitational field of earth and never returns back on its own

• a)
  1
• b)
  zero
• c)
  infinity
• d)
  1000

• a)
  This reaction is spontaneous
• b)
  ΔS° _{(surrounding)} > 0
• c)
  ΔS° _(total) > 0
• d)
  All of these are correct statements

• a)
  A
• b)
  B
• c)
  C
• d)
  D

• a)
  GMm/r
• b)
  2GMm/r
• c)
  GMm/2r
• d)
  zero

• a)
  10 ms^-1
• b)
  15 ms^-1
• c)
  zero
• d)
  1 ms^-1

For the reaction, at 1000° C

ΔG° = - 24 kJ mol^-1,  = 0.0030 atm.

Q. Hence, ΔG at this temperature is

• a)
  - 60.5 kJ mol^-1
• b)
  - 85.49 kJ mol^-1
• c)
  -33.5 kJ mol^-1
• d)
  + 33.5 kJ mol^-1

• a)
  Chiasmata
• b)
  Chromomeres
• c)
  Bivalents
• d)
  Centromeres

• a)
  v = GM/r
• b)
  v² = FMm/r
• c)
  v = Gm/r
• d)
  v²=GM/r

• a)
  Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I
• b)
  Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I
• c)
  Statement I is correct but Statement II is incorrect
• d)
  Statement II is correct but Statement I is incorrect

Passage l

Sulphur undergoes a phase transition between 80 and 110°C
S(rhombic) S (monoclinic); ΔH° = 3.213 kJ mol^-1; ΔS° = 8.71 JK^-1 mol^-1

 

Q. Temperature at which ΔG° = 0, is

• a)
  369.0 K
• b)
  0.3693 K
• c)
  273 K
• d)
  - 273 K

• a)
  Non-sister chromatids of non-homologous chromosomes
• b)
  Sister chromatids of homologous chromosomes
• c)
  Sister chromatids of non-homologous chromosomes
• d)
  Non-sister chromatids of homologous chromosomes

• a)
  It is defined as the work done in taking a unit mass from one point to that point
• b)
  It is defined as the work done in taking a unit mass from infinity to that point
• c)
  It is defined as the energy spent in taking a unit mass from infinity to that point.
• d)
  none

• a)
  The force with which an object is pushed towards the centre of the Earth
• b)
  The force with which an object is pulled towards the centre of the Earth
• c)
  The force with which an object is pulled towards the centre of the Sun.
• d)
  The energy with which an object is pulled towards the centre of the Earth

• a)
  The entropy of a substance increases on going from the liquid to the vapour state at any temperature
• b)
  An exothermic reaction will always be spontaneous
• c)
  Reactions with a positive (ΔH° and ΔS°) can never be product favoured
• d)
  If ΔG° for a reaction is negative, the reaction will have an equilibrium constant i greater than one

• a)
  7.3 cal
• b)
  -5.3 Kcal
• c)
  7.3 Kcal
• d)
   -7.3 Kcal

• a)
  Body will leave the planets atmosphere and never come back
• b)
  Will reach certain height and orbit around planet or fall back on the planet
• c)
  Will reach certain height and orbit around planet
• d)
  Fall back on the planet

• a)
  GMm/r
• b)
  2GMm/r
• c)
  GMm/2r
• d)
  zero

• a)
  weight
• b)
  area
• c)
  volume
• d)
  pollution

• a)
  400 K
• b)
  350 K
• c)
  298 K
• d)
  250 K

If for the cell, Zn(s) + Cu²⁺(ag) Cu(s) + Zn²⁺ (ag)entropy change ΔS° is 96.5 JK^-1 mol^-1, then temperature coefficient of the emf of a cell is

• a)
  5 x 10^-4 VK^-1
• b)
  1 x 10^-3 VK^-1
• c)
  2 x 10^-3 VK^-1
• d)
  9.65 x 10⁴ VK^-1

When HCI(g)and NH₃(g)come in contact, they react producing a white cloud of solid NH₄CI

For this,

• a)
  
• b)
  
• c)
  
• d)
  

Direction (Q. Nos. 11-14) This section contains 2 paragraph, wach describing theory, experiments, data etc. three Questions related to paragraph have been given.Each question have only one correct answer among the four given options (a),(b),(c),(d).

Passage l

Sulphur undergoes a phase transition between 80 and 110°C
S(rhombic) S (monoclinic); ΔH° = 3.213 kJ mol^-1; ΔS° = 8.71 JK^-1 mol^-1

 

Q. Select the correct alternate(s).

• a)
  At 80°C S_R is as stable as S_M 
• b)
  At 80°C S_R is less stable than S_M
• c)
  At 110°C S_R is more stable than S_M
• d)
  At 110°C S_R is less stable than S_M

For the following decom position reaction, 

ΔG° = 1700 J mol^-1 at 290 K , (log 5 = 0.6990]

Thus, pressure set up is

• a)
  0.3
• b)
  0.6990
• c)
  0.5
• d)
  0.25

Direction (Q. Nos. 1- 8) This section contains 8 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE option is correct.

Q. For the given reaction, = - 1.3818 kcal at 300 K. Thus equilibrium constant is

• a)
  1
• b)
  0
• c)
  0.1
• d)
  100