Archives

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 football even both are of same size... 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 to see the nearby objects.... 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... View Article

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, flies, moulds and... 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 electric power. It is... 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 left behind.... 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 molecules in the volume (22.4 dm3) of D at STP = 6 x 1023.... 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 glands.... 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.... View Article

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 1000nm.... 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 force be Zero.... 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. The... View Article

What is the conclusion for an object moving with a uniform velocity?

There is no unbalanced force. There might be a number of forces acting on the body but these forces are adding up to zero.... View Article

Among the following compounds the one that is paramagnetic is: a. O22- b. O3 c. N2O d. O2-

In O22-, O3 and N2O no unpaired electron is present. But O2- has one unpaired electron and shows paramagnetic behaviour.... View Article

What is a Finkelstein reaction?

In the Finkelstein reaction, alkyl iodides are prepared by the reaction of alkyl chlorides/bromides with NaI in dry acetone. The Finkelstein... View Article

Nitric acid does not react with which of the following metals? a. Chromium b. Magnesium c. Maganese d. Zinc

Chromium do not dissolve in concentrated nitric acid because of the formation of a passive film of oxide on the surface.... View Article

Amongst the following molecules, the one with the highest bond multiplicity is: a. Ethene b. Ethyne c. Ethane

Ethane has single bond, ethene has double bond, ethyne has triple bond. Hence ethyne has highest bond multiplicity.... View Article

Oxygen is transported from alveoli to tissues in the form of

Oxygen is transported from alveoli to tissues in the form of oxy haemoglobin that is an association of O2 with Hb.... View Article

Oxidation reactions involve loss of dihydrogen so they are also known as:

Oxidation reactions are also known as dehydrogenation reactions as they involve loss of dihydrogen from alcohol.... View Article

M	T	W	T	F	S	S
		1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30	31