Yatin Singla asked • 1 hour ago

Initially one mole of ideal gas at 1.0 atm and 300 K is put through the following cycle:

.

Step – I : Heating to twice its initial pressure at constant volume.

Step – II : Adiabatic expansion to its initial temperature.

Step – III : Isothermal compression back to 1.00 atm.

What is the volume at state X?

- a)40.4 L
- b)65.0L
- c)139 L
- d)4.35 L

Correct answer is option 'C'. Can you explain this answer?

Niya Sinha asked • 1 hour ago

Which one of the following is NOT TRUE of RNA polymerase II ?

- a)It requires a primer to initiate the transcription
- b)It makes an RNA copy of only one strand of a double- stranded DNA at any given time
- c)It does not synthesize rRNA and tRNA
- d)It catalyzes the polymerization of RNA only in the 5' → 3' direction

Correct answer is option 'A'. Can you explain this answer?

Sandhya Bhatt asked • 2 hours ago

Which of the following statements about mature tRNA and/or mRNA are FALSE?

- a)tRNAs end with CCA sequence at the 3’ end
- b)Both form clover-leaf structures
- c)Both are polyadenylated at their 3’ ends
- d)All tRNAs are devoid of introns

Correct answer is option 'B,C,D'. Can you explain this answer?

Rasika Bulbule asked • 2 hours ago

Antigen and antibody interaction is shown by the following scheme

Where Ab is antibody, Ag is antigen and Ab- Ag is antigen- antibody complex. The value of k1 and k^{–1} are 5 × 10^{–5} mM^{-1} s^{-1} and 2 × 1^{-7} s^{-1}, respectively. The dissociation constant for the complex is _______ nM.

Correct answer is '4'. Can you explain this answer?

Riniya Najeeb asked • 4 hours ago

The complexity of DNA can be less than or equal to its molecular mass. It depends on the degree of repetitiveness of the sequence.

Shown below is the schematic of a double stranded 30- mer oligonucleotide wherein the 3 bp at the two termini are of different sequences:

Shown below is the schematic of a double stranded 30- mer oligonucleotide wherein the 3 bp at the two termini are of different sequences:

Assuming that the molecular mass of a bp is M Da, what is the complexity (in Da) of the oligonucleotide sequence given above?

Krishka Krishka asked • 4 hours ago

The attitude of folds and fold systems is or can be fully characterized by :

- a)Strike, dip and dip direction of the axial planar surface.
- b)The pole to beddings plotted on a stereonet canvas.
- c)The plunge and plunge direction of the fold axis.
- d)The plunge and plunge direction of the fold axis, and the plunge and plunge direction of an axial trace

Correct answer is option 'A,C,D'. Can you explain this answer?

Prajakta Kshirsagar asked • 6 hours ago

Decreased growth, pigmented retinopathy, hemolytic anemia, and peripheral neuropathy are shown in 7- month- old boy. You surmise that these signs are the consequence of a vitamin deficiency leading to increased fatty acid oxidation. W hich of the following is most likely responsible for this patient's symptoms ?

- a)Pernicious anemia
- b)Abetalipoproteinemia
- c)Cow milk ingestion
- d)Hartnup disease

Correct answer is option 'B'. Can you explain this answer?

Riya Chaturvedi asked • 7 hours ago

Which of the following statement is correct ?

- a)Gram negative bacteria are colored purple after Gram staining
- b)Gram negative bacteria are commonly more resistance to antibiotics than Gram positive bacteria
- c)Gram negative bacteria cell wall consists of a thick layer of peptidoglycan outside the plasma membrane
- d)Cell wall of Gram negative bacteria does not contain an outer membrane

Correct answer is option 'B'. Can you explain this answer?

Esha Kumari asked • 7 hours ago

Viral capsids are made up of morphological subunits called capsomeres. One of the common capsomeres is icosahedral. The icosahedron is a regular polyhedron with

- a)16 triangular facets and 12 vertices.
- b)20 triangular facets and 12 vertices.
- c)16 triangular facets and 16 vertices.
- d)20 triangular facets and 16 vertices.

Correct answer is option 'B'. Can you explain this answer?

Jyota Mishr asked • 7 hours ago

The ratio of for Ca_{3}(PO_{4})_{2} will be equal to:

- a)Fe(s) → Fe
^{2+}(aq.) + 2e^{-}(at anodic site) - b)O
_{2}(g) + 4H^{+}(aq.) + 4e^{-}→ 2H_{2}O (l) (at cathodic site) - c)4Fe
^{2+}(aq.) + O_{2}(g) + 4H_{2}O(l) → 2Fe_{2}O_{3}(s) + 8H^{+} - d)Fe
_{2}O_{3}(s) + xH_{2}O(l) → Fe_{2}O_{3}.xH_{2}O

Correct answer is '6'. Can you explain this answer?

B P S asked • 8 hours ago

With respect to periodic properties, the CORRECT statement is

- a)Electron affinity order is F > O > Cl
- b)First ionisation energy order is Al > Mg > K
- c)Atomic radius order is N > P > As
- d)Ionic radius order is K
^{+}> Ca^{2+}> Mg^{2+}

Correct answer is option 'D'. Can you explain this answer?

Priyanka Yadav asked • 9 hours ago

The correct statement(s) about NO_{2}, NO_{2}+ and CO_{2} is /are

- a)Both NO
_{2}and CO_{2}are paramagnetic. - b)NO
_{2}is paramagnetic and NO_{2}+ is diamagnetic - c)Both CO
_{2}and NO_{2}+ have linear geometry. - d)CO
_{2}and NO_{2}+ are isoelectronic.

Correct answer is option 'B,C,D'. Can you explain this answer?

Ankita Dubey asked • 11 hours ago

Age of granitic rocks can be determined using Rb- Sr whole rock radioactive dating method and the following age equation,

For a suite of representative co- magmatic granitic rocks, the Rb- Sr whole rock isochron plot and relevant data are shown in the diagram. The age of granite is calculated at ____ Ga (1Ga = 10^{9} yrs, give answer in one decimal place).

Correct answer is between '0.9,1.1'. Can you explain this answer?

Simran Sehdev asked • 11 hours ago

Let x, x + e^{x} and 1 + x + e^{x} be solutions of a linear second order ordinary differential equation with constant coefficients. If y(x) is the solution of the same equation satisfying y(0) = 3 and y'(0) = 4, then y(1) is equal to

- a)3e + 1
- b)2e + 3
- c)3e + 2
- d)e + 1

Correct answer is option 'A'. Can you explain this answer?

Disha Bhagat asked • 12 hours ago

Solutions of equal strength of XOH and QOH are prepared. The I.P.’s of X and Q are 5.1 and 13.0 eV respectively, whereas their E.N’s are 0.9 and 3.2 respectively. Using the information spot the incorrect conclusion:

- a)Reaction of XOH and NH
_{4}Cl will produce NH_{3} - b)Solution of QOH will give effervescence with NaHCO
_{3} - c)Phenolphthalein will give pink colour with XOH solutions
- d)The pH of QOH solution will be more than 7.

Correct answer is option 'D'. Can you explain this answer?

Bsc Hub asked • 14 hours ago

be sequences of positive real numbers such that nan < bn < n^{2}a_{n} for

all n__>__ 2. If the radius of convergence of the power series then the power series

all n

- a)converges for all x with |x| < 2
- b)converges for all x with |x| > 2
- c)does not converge for any x with |x| > 2
- d)does not converge for any x with |x| < 2

Correct answer is option 'B'. Can you explain this answer?

Pooja Shah asked • 14 hours ago

Which of the following statement(s) is/are true about the transition metal- alkene complexes?

- a)Back- bonding weakens the double bond of the alkene
- b)σ- Bonding and back- bonding synergistically strengthen metal- alkene interaction
- c)Electron- withdrawing substituents on alkene reduce back- bonding
- d)π- Acidic co- ligands on metal strengthen back- bonding

Correct answer is option 'A,B'. Can you explain this answer?

Adarsh Kumar Pathak asked • 14 hours ago

In the given list, the total number of compounds that form a clear homogenous solution on treatment with cold dilute H_{2}SO_{4} is _______

1-propyne

cyclohexanone

cyclohexane

1-propene

propan-1-amine

propoxypropane

tetrahydropyran

ethyl butanoate

pyridine

cyclohexanone

cyclohexane

1-propene

propan-1-amine

propoxypropane

tetrahydropyran

ethyl butanoate

pyridine

Correct answer is '4'. Can you explain this answer?

Adnan Arif asked • 14 hours ago

A raindrop falls under gravity and captures water molecules from atmosphere. Its mass changes atthe rate λm(t), where λ is a positive constant and m(t) is the instantaneous mass. Assume thatacceleration due to gravity is constant and water molecules are at rest with respect to earth beforecapture. Which of the following statements is correct?

- a)The speed of the raindrop increases linearly with time.
- b)The speed of the raindrop increases exponentially with time.
- c)The speed of the raindrop approaches a constant value when λt >>1.
- d)The speed of the raindrop approaches a constant value when λt << 1.

Correct answer is option 'C'. Can you explain this answer?

Vishnu Priya Mohan Balaj asked • 15 hours ago

The electrostatic potential (φ_{r}) of a spherical symmetric system, kept at origin, is shown in the adjacent figure, and given as

W hich of the following option(s) is/are correct?

- a)For spherical region r < R
_{0}, total electrostatic energy stored is zero. - b)W ithin r = 2R
_{0}, total charge is q. - c)There will be no charge anywhere except at r = R
_{0}. - d)Electric field is discontinuous at r = R
_{0}.

Correct answer is option 'A,B,C,D'. Can you explain this answer?

Niya Sinha asked • 17 hours ago

Determine the correctness or otherwise of the following Assertion [a] and Reason [r].Assertion [a]. B cells secrete antibodies against a virus while cytotoxic T cells kill virus-infected cells.Reason [r]. B cells confer active immunity while cytotoxic T cells confer passive immunity.

- a)[a] and [r] are true and [r] is the correct reason for [a]
- b)[a] and [r] are true but [r] is not the correct reason for [a]
- c)[a] is true but [r] is false
- d)[a] false but [r] is true

Correct answer is option 'C'. Can you explain this answer?

Mahalakshmi Asoken asked • 18 hours ago

be sequences of positive real numbers such that nan < bn < n^{2}a_{n} for

all n__>__ 2. If the radius of convergence of the power series then the power series

all n

- a)converges for all x with |x| > 2
- b)converges for all x with |x| < 2
- c)does not converge for any x with |x| > 2
- d)does not converge for any x with |x| < 2

Correct answer is option 'B'. Can you explain this answer?

Aakash Kumar asked • 21 hours ago

The mass per unit length of a rod (length 2 m) varies as ρ = 3x kg/m. The moment of inertia (in kg m^{2}) of the rod about a perpendicular-axis passing through the tip of the rod (at x = 0) is

- a)10
- b)12
- c)14
- d)16

Correct answer is option 'B'. Can you explain this answer?

Ankita Dubey asked • yesterday

Aluminium (Al) can occur in both tetrahedral and octahedral co- ordinations in silicates. The amount of octahedral Al in a pyroxene crystal of composition MG_{1.4} Fe_{0.4} Al_{0.4} Si_{1.8} O_{6} is ____ (give answer in one decimal place).

Correct answer is '0.2'. Can you explain this answer?

B P S asked • yesterday

The CORRECT order of Δ_{o} (the octahedral crystal field splitting of d orbitals) values for the following anionic metal complexes is

- a)[Ir(CN)
_{6}]^{3-}< [Rh(CN)_{6}]^{3-}< [RhI_{6}]^{3-}< [CoI_{6}]^{3-} - b)[CoI
_{6}]^{3-}< [RhI_{6}]^{3-}< [Rh(CN)_{6}]^{3-}< [Ir(CN)_{6}]^{3-} - c)[CoI
_{6}]^{3-}< [Rh(CN)_{6}]^{3-}< [RhI_{6}]^{3-}< [Ir(CN)_{6}]^{3-} - d)[Ir(CN)
_{6}]^{3-}< [CoI_{6}]^{3-}< [Rh(CN)_{6}]^{3-}< [RhI_{6}]^{3-}

Correct answer is option 'B'. Can you explain this answer?

Abhishek Bhardwaj asked • yesterday

The emf of a standard cadmium cell is 1.02 V at 300 K. The temperature coefficient of the cell is –5.0 x 10^{–5} V K–1. The value of ΔH° for the cell is _________ kJ mol^{-1} (rounded up to two decimal places).

[1 F = 96500 C mol^{-1}]

[1 F = 96500 C mol

Correct answer is between '-201.00,-198.00'. Can you explain this answer?

B P S asked • yesterday

Elemental analysis of an organic compound containing C, H and O gives percentage composition: C: 39.9 % and H: 6.7 %. If the molecular weight of the compound is 180, the number of carbon atoms present in the molecule is________.

Correct answer is between '6,6'. Can you explain this answer?

Vishal Thakur asked • yesterday

A substance when dissolved in water at 10^{–3} M concentration absorbs 10 per cent of an incident radiation in a path of 1 cm length.The concentration of the solution in order to absorb 90 per cent of the same radiation is: x × 10^{–2} what will be value of x :

Correct answer is between '2.0,2.2'. Can you explain this answer?

Palak Sethi asked • yesterday

For H_{2} molecule, the fundamental vibrational frequency can be taken as 4400 cm^{-1}. The zeropoint energy of the molecule is ______ kJ mol^{-1 }(rounded up to two decimal places).

[h = 6.6×10^{-34} J s, c = 3×10^{8} m s^{-1},N_{A} = 6×10^{23} mol^{-1}]

[h = 6.6×10

Correct answer is between '25.80,26.40'. Can you explain this answer?

Apurva Arun asked • yesterday

Which of these is a comparatively insignificant factor affecting the magnitude of specific optical rotation?

- a)Concentration of the substance of interest
- b)Purity of the sample
- c)Temperature of the measurement
- d)Length of the sample tube
- e)All of the above are equally significant.

Correct answer is option 'C'. Can you explain this answer?

Jyota Mishr asked • yesterday

If molecular weights of NH_{3} and N_{2} are M_{1} and M_{2} respectively, and their equivalent weights are E_{1} and E_{2} respectively, then (M_{1} – M_{2}) is equal to:

- a)3E
_{1}– 6E_{2} - b)3E
_{1}– 3E_{2} - c)6E
_{1}– 6E_{2} - d)6E
_{1}– 3E_{2}

Correct answer is option 'A'. Can you explain this answer?

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