The pair of electron in the given carbanion, CH3CH C, is present in which of the following orbitals?
For the following reactions:
(a) CH3CH2CH2Br + KOH CH3CH = CH2 + KBr + H2O
Which of the following statements is correct?
(a) and (b) are elimination reactions and (c) is addition reaction.
(a) is elimination, (b) is substitution and (c) is addition reaction.
(a) is elimination, (b) and (c) are substitution reactions.
(a) is substitution, (b) and (c) are addition reactions.
The correct statement regarding the basicity of arylamines is :
Arylamines are generally less basic than alkylamines because the nitrogen lone-pair electrons are delocalized by interaction with the aromatic ring electron system.
Arylamines are generally more basic than alkylamines because the nitrogen lone-pair electrons are delocalized by interaction with the aromatic ring electron system.
Arylamines are generally more basic than alkylamines because of aryl group.
Arylamines are generally more basic than alkylamines, because the nitrogen atom in arylamines is sp-hybridized.
Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for one-half of the hydrogen to escape?
Which of the following guards the opning of hepatopancreatic duct into the duodenum?
Sphincter of Oddi
Reduction in pH of blood will:
reduce the rate of heart beat.
reduce the blood supply to the brain.
decrease the affinity of hemoglobin with oxygen.
release bicarbonate ions by the liver.
Name the chronic respiratory disorder caused mainly by cigarette smoking:
Asthma may be attributed to:
bacterial infection of the lungs
allergic reaction of the mast cells in the lungs
inflammation of the trachea
accumulation of fluid in the lungs
Photosensitive compound in human eye is made up of :
Guanosine and Retinol
Opsin and Retinal
Opsin and Retinol
Transducin and Retinene
OPSIN AND RETINOL
In the stomach, gastric acid is secreted by the :
gastrin secreting cells
Blood pressure in the pulmonary artery is:
same as that in the aorta.
more than that in the carotid.
more than that in the pulmonary vein.
less than that in the venae cavae.
Lack of relaxation between successive stimuli in sustained muscle contraction is known as:
Wild contraction- spasm
Slight contraction - tonus
Sustained contraction - tetany or tetanus
A car is negotiating a curved road of radius R. The road is banked at an angle . The coefficient of friction between the types of the car and the road is s. The maximum safe velocity on this road is:
Lithium has a bcc structure. Its density is 530 kg m-3 and its atomic mass is 6.94g mol-1. Calculate the edge lenth of a unit cell of Lihium metal. (NA = 6.02 x 1023 mol-1)
A gas is compressed is isothermally to half its initial volume. The same gas is compressed separately through and adiabatic process until its volume is again reduced to half. Then:
Compressing the gas isothermally will require more work to be done.
Compressing the gas through adiabatic process will require more work to be done.
Compressing the gas isothermally of adiabatically will require the same amount or work.
Which of the case (wheather compression through isothermal or through adiabatic process) requires more work will depend upon the atomicty of the gas.
The product formed by the reaction of an aldehyde with a primary amine is:
A astronomical telescope has objective and eyepiece of focal lengths 40 cm and 4 cm respectively. To view an object 200 cm away from the objective, the lenses must be separated by a distance :
An inductor 20 mH, a capacitor and a resistor are connected in series across a source of emf V = 10 sin 340 t. The power loss in A.C circuit :
A long solenoid has 1000 turns. When a current of 4A flows through it, the magnetic flux linked with each turn of the solenoid is 4 x 10-3 Wb. The self-inductance of the solenoid is:
Two electrons occupying the same orbital are distinguished by :
Principle quantum number
Magnetic quantum number
Azimutual quantum number
Spin qauntum number