Addition of ozone molecule to alkene to form ozonide is known as:
The Addition of ozone molecule to alkene to form unstable ozonide followed by reduction with zinc dust and water to... View Article
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Why is it advised to drive along the slippery road slowly?
It is advised to drive along the slippery road slowly, because friction is reduced and if the driver is driving... View Article
What is the state of an object, if the object is experiencing a net zero unbalanced force?
If an object experiences a net zero unbalanced force, then the body moves with a constant velocity, or if it... View Article
Which part of eye that has the highest concentration of cones?
The macula lutea or the fovea centralis, also called yellow spot has the highest concentration of cones. The image formed... View Article
Give examples of three physical quantities that are having dimensions [ M L-1 T-2].
Pressure = Force/Area = ML1T-2/ L2 = [M L-1 T-2] Stress = Force/Area = ML1T-2/ L2 =[M L-1 T-2] Coefficient... View Article
Why do the liquids boil at lower temperature at high altitude?
At high altitudes, the atmospheric pressure is quite low as compared to that at sea level. So water boils at... View Article
How to determine the exact position and momentum of an electron?
Simultaneous determination of exact position and momentum of an electron is not possible. This is according to Heisenberg’s uncertainty principle. The... View Article
Why is making of anti-viral drugs is more difficult than making anti-bacterial medicines?
Making anti-viral drugs is more difficult than making anti-bacterial medicines because viruses have very few biochemical mechanisms of their own.... View Article
Which of the following has a higher inertia: a football or a stone of the same size?
Inertia of stone is greater than the inertia of football because mass of stone is higher than the mass of... View Article
Isha’s eye balls are too short due to which she cannot see
Since Isha’s eye balls are short, so she is suffering from hypermetropia. In this defect, a person is not able... View Article
Which disease is marked by inflammatory or degenerative changes of the nerves? a) Beriberi b) Rickets c) Scurvy d) Xerophthalmia
Beriberi: Impairment of the nerves and heart Rickets: Brittle bones Scurvy: Bleeding gums Xerophthalmia: Dryness of cornea and ulceration
Have you seen any other organism besides redworms in your pit? If yes, try to find out their names.
Yes. A pit might contain other soil microbes such as bacteria, other species of earthworms such as brandling worm,small bugs,... View Article
Which of the following terms does not represent electrical power in a circuit? (1) I2R (2) IR2 (3) VI (4)V2/R
Answer: (2) IR2 In physics, the rate of electrical energy transfer by an electrical circuit per unit time is determined by... View Article
How do we separate a mixture of anthracene and sodium chloride?
Anthracene sublimes on heating and gets collected on the cooler sides of the inverted funnel and sodium chloride will be... View Article
The volumes of gases A, B, C and D are in this ratio 1 : 2 : 2 : 4 under the same conditions of temperature and pressure.If the volume of A is actually 5.6 dm3 at STP, calculate the number of molecules in the actual volume of D at STP (Avogadro’s number is 6 x 10 23). The volume of D is four times the volume of A as given.
The volume of D will be 4 x 5.6 dm3 at STP = 22.4 dm3 at STP The number of... View Article
Which of the following is not a derivative of skin? (a) Thyroid gland (b) Sebaceous glands (c) Mammary glands (d) Sweat Glands
Answer: (a) Thyroid gland The special derivatives of human skin include the hair, nails, sebaceous glands, sweat glands and mammary... View Article
Nick suffers from a disease called lactose intolerance. He cannot digest milk, and suffers from severe diarrhoea when he consumes the same. Since milk is a good source of calcium, he has to consume other food items containing calcium, so that the calcium deficiency caused by lack of milk intake is covered. Which of the following food items is a rich source of calcium?
Among the given alternatives, spinach is a rich calcium source and can be consumed by people suffering from lactose intolerance.
In colloidal system, which particles has the size of 1nm – 1000nm?
The dispersion medium is the substance in which the colloidal particles are distributed in the particle range of 1nm to... View Article
What will be the momentum of a body, if the force acting on the body is zero?
Force, F = dp /dt ( rate of change of momentum).Therefore, only when the momentum is constant, will the acting... View Article
Name a device that helps to maintain a potential difference across a conductor.
Potential difference can be defined as the difference in energy that charge carriers have between two points in a circuit.... View Article
