Dihedral angle in staggered form of ethane is

Which alkene on ozonolysis gives CH3CH2CHO and ?

When acetylene is passed through dil. H₂SO₄ in the presence of HgSO₄, the compound formed is

In Friedel craft’s alkylation, besides AlCl₃ the other reactants are

A. C₆H₆ + CH₃Cl

B. C₆H₆ + CH₄

C. C₆H₆ + NH₂ – NH₂

D. C₆H₆ + CH₃COCL

Gammexane is

Which of the following reaction is expected to readily give a hydrocarbon product in good yields?

In a reaction

Where M = Molecule and R = Reagent. M and R are

A. CH₃CH₂OH and HCl

B. CH₃ – CH₃ and heat

C. CH₃CH₂Cl and NaOH

D. CH₂Cl – CH₂OH and aq NaHCO₃

The cylindrical shape of alkyne is due to

1. Given that C + O₂ à.CO₂, ∆H° = -X kJ

2CO + O2 à 2CO2, ∆H° = -y kJ

What is heat of formation of CO?

A. Y-2x/2

B. 2x-y

C. Y-2x

D. 2x-y/2

Identify the correct statement regarding entropy

One mole of an ideal gas at 300k is expanded isothermally from an initial volume of 1 litre to 10 litres. The ∆E for this process is (R = 2 cal. Mol-1K-1)

Which of the following is not state functions?

i. q+w

ii. q

iii.w

iv H-TS

Bond dissociation enthalpy of H2 , Cl2 and HCl are 434 , 242 and 431 kJmol^-1 Enthalpy of formation of HCl is

For the gas phase reaction, PCl5(g)⇋ PCl3(g) + Cl2 (g) , which of  the following conditions is correct?

Following reaction occurring in an automobile 2C8H18(g) + 25O2(g) à 16CO2(g) + 18H2O(g). The sign of ∆H, ∆S and ∆G would be 

If enthalpies of formation for C₂H₄(g) , CO₂(g) and H₂O(I) at 25°C and 1 atm pressure are 52, -394 and -286 kJ/mol respectively, then enthalpy of combussion of C₂H₄(g) will be

50 ml of hydrogen diffuses out through a small hole of a vessel, in 20 minutes. The time taken by 40 ml of oxygen to diffuse out is

The temperature of a gas is raised from 27° C to 927° C. The root mean square speed of the gas

An ideal gas, obeying kinetic theory of gases can not be liquefied, because

Which of the following mixture of gases does not obey Dalton’s Law of partial pressure?

A. Cl₂ and SO₂

B. CO₂ and He

C. O₂ and CO₂

D. N₂ and O₂

24 g of a volatile substance, upon vapourisation, gives 45 ml vapour at NTP. What will be the vapour density of the substance?

The average kinetic energy of an ideal gas, per molecule in S.I units at 25C will be

A. 17*10^-20 J

B. 16*10^-20 J

C. 7 * 10^-21 J

D. 17 * 10^-21 J

At what temperature the rate of effusion of N₂ would be 1.625 times than the rate of SO₂ at  500°C?

  At 25° C and 730 mm pressure, 380 ml of dry oxygen was collected. If the temperature is constant, what volume will the oxygen occupy at 760 mm pressure?

Van der Waal’s real gas acts as an ideal gas, at which conditions?

The surface tension of which of the following liquid is maximum?

At 27° C latent heat of fusion of a compound is 2930 J/mol. Entropy change is

For the reaction

C₂H₅OH(/) + 3O₂(g) à 2CO₂(g) + 3H₂O(/), which one is true?

What is the major product A?

CH2 = CH – CH2-C≡CH + H2 A

(1 mole)

What is A?

A rod of mass 5 kg is connected to the string at point B. The span of rod is along horizontal. The other end of the rod is hinged at point A. If the string is massless, men the reaction of hinge at the instant when string is cut, is (Take, g = 10 ms^2)

Two bodies have their moments of inertia 1I and 2I respectively about their axis of rotation. If their kinetic energies of rotation are equal, their angular momenta will be in the ratio.

A small mass attached to a string rotates on a frictionless table top as shown. If the tension on the string is increased by pulling the string causing the radius of the circular motion to decrease by a factor of 2, the kinetic energy of the mass will

One solid sphere A and another hollow sphere B are of same mass and same outer radii. Their moment of inertia about their diameters are respectively I_A and I_B such that

One quarter sector is cut from a uniform circular disc of radius R.  This sector has mass M.  It is made to rotate about a line perpendicular to its plane and passing through the centre of the original disc.  Its moment of inertia about the axis of rotation is

What is the acceleration of the rolling sphere at the centre of the plane with inclination, Ө to the horizontal?

A wheel of radius 10 cm can rotate freely about its center as shown in figure. A string is wrapped over its rim and is pulled by a force of 5.0 N. It is found that the torque produces an angular acceleration 2.0 rad/s2 in the wheel. Calculate the moment of inertia of the wheel.

A massless rod S having length 2l has point masses attached to its two each as shown in Fig. The rod is rotating about an axis passing through its centre and making angle α with the axis. The magnitude of rate of change of momentum of rod i.e. ∣dL/dt∣ equals

If a disc starting from rest acquires an angular velocity of 240 revolution/ min in 10 s, then its angular acceleration will be

A uniform circular disc of radius 50 cm at rest is free to turn about an axis which is perpendicular to its plane and passes through its centre. It is subjected to a torque which produces a constant angular acceleration of 2 rad s−1. Its net acceleration in ms−2 at the end of 2 s is approximately

What is the relation between the escape velocity and orbital velocity of a satellite, if the satellite is close to the earth’s surface?

What happens to the weight of the body if the weight becomes 1/16 at certain? Also, consider the radius of the earth to be R

What is the maximum height attained by the rocket above the surface of the earth if the mass of the rocket is M, and the initial speed to be V. Assume that R is the radius of the earth.

What is the increase in the potential energy of the body with mass m if the body is taken at the height h which is equal to the radius of the earth?

Consider a body of mass m which needs to be moved from an orbit of radius 2R to 3R. What is the energy required

The distance between the closest planet and the sun is r1 while the distance between the farthest planet and the sun is r2. The linear velocities of these planets are v1 and v2 respectively. What is the ratio of v1/v2

If a satellite takes time T for revolution, the kinetic energy is proportional to

The acceleration due to gravity at a height 1km above the earth is the same as at a depth d below the surface of earth. Then

Consider a drop of rain water having mass 1 g falling from a height of 1 km. It hits the ground with a speed of 50 m/s.  Take g constant with a value of 10 m/s2.  The work done by the
(i) gravitational force and the (ii) resistive force of air is

Starting from the centre of the earth having radius R, the variation of g (acceleration due to gravity) is shown by

Two spherical bodies of masses M and 5M and radii R and 2R are released in free space with initial separation between their centre’s equal to 12R. If they attract each other due to gravitational force only, then the distance covered by the smaller body before collision is

The bulk modulus of a spherical object is B. If it is subjected to uniform pressure p, the fractional decrease in radius is

The Young’s modulus of steel is twice that of brass. Two wires of same length and of same area of cross-section, one of steel and another of brass are suspended from the same roof. If we want the lower ends of the wires to be at the same level, then the weight added to the steel and brass wires must be in the ratio of

Copper of fixed volume V is drawn into wire of length l. When this wire is subjected to a constant force F, the extension produced in the wire is Δl. Which of the following graphs is a straight line?

The following four wires are made of the same material. Which of them will have the largest extension when the same tension is applied?

The relationship between Young’s modulus Y, Bulk modulus K and modulus of rigidity n is

The Young’s modulus of a rubber string 8 cm long and density 1.5 kg/m3 is 5×10^8 N/m2, is suspended on the ceiling in a room. The increase in length due to its own weight will be

The possible value of Poisson’s ratio is

A wire of diameter 1mm breaks under a tension of 1000 N. Another wire, of same material as that of the first one, but of diameter 2 mm breaks under a tension of

When a weight of 10 kg is suspended from a copper wire of length 3 metres and diameter 0.4 mm, its length increases by 2.4 cm. If the diameter of the wire is doubled, then the extension in its length will be

Which of the following statements is false?

Diagrammatic cross sectional view of a muscle. Find the wrong statement regarding this marked structure?

Which of the following statements about the molecular arrangement of actin and myosin in myofibrils is false?

1. Each actin (thin filament) is made of 2F (filamentous) actins ·
2. F-actin is the polymer of G (globular) actin\
3. 2F-actins are twisted into a helix
4. Two strands of tropomyosin (protein) lie in the close to F-actin
5. Troponin molecules (complex proteins) are distributed at regular intervals on the tropomyosin
6. Troponin forms the head of the myosin molecule
7. The myosin is a polymerized protein

Stages in cross bridge formation. Find the wrong option regarding this

  Mark the incorrect match

Sliding filament theory can be best explained as

1. Identify the ribs –
2. Ribs are attached to the sternum ventrally and to the vertebrae dorsally.( 1st to 7th pair)
3. Ribs are attached to sternum through costal cartilage (hyaline) of 7th rib (8th to 10th pair)
4. Ribs are not attached to sternum (11th and 12th pair)

I.True ribs

II. False ribs

Ill. Floating ribs

Which of the following is correct vertebral formulae of human?

Which of the following is incorrect match?

The diagrams given above show 3 different condition of sarcomeres. Identify these conditions –

     Which of the following is incorrect w.r.t. red muscle fiber when compared to white muscle fiber?

During relaxation of the muscle which of the following do not occur?

How many bones are present in human skull?

Each coxal bone is formed by fusion of three bones?

Maximum mass of the bones is made up of :-

The contraceptive ‘SAHELI’

MTP is legalised in India. It becomes essential in certain cases where

Consider the following statements

i. Contraceptive pills alter the quality of cervical mucous to retard entry of sperms

ii. Saheli is an oral contraceptive contains steroid preparation

iii. Saheli is the “once a week” pill with very few side effects and high contraceptive value

iv. Cervical caps, vaults and diaphragms are reusable Which of the above statements are true?

Estrogen is used to avoid pregnancy because it :-

In females hundred percent effective method of birth control is provided by

Medical termination of pregnancy is legalized upto

Lactational amenorrhea method is based on:

What is true for IUDs?

I.                    They are self-inserted

II.                  They are inserted by expert nurses

III.                They may be non-medicated lUDs, copper releasing lUDs or hormone releasing lUDs.

IV.                They are the one of the most widely accepted contraceptives in India. V. They are inter-uterine devices

Condoms are barriers that cover-

What was the growth rate according to the 2001 census report?

 Most important component of oral contraceptive

is :-

Which substance can be used as male contraceptive

in future:-

What is correct about test tube baby:-

Which of the following methods of contraception

Prevents ovulation ?

  The partner responsible for sex of the child is:-