Answer: No. The process does not violate the law of conservation of energy. When the body falls from a height, its potential energy changes... View Article
Packing efficiency is maximum in the case of Hexagonal close-packing, which is 74%, and the least space occupied is in the simple cubic unit... View Article
(a) The protruding part of the throat in boys is called Adam's apple. The enlarged voice box or larynx gets enlarged and visible from outside at... View Article
The motion of planets around the earth, rainfall and snowfall, and tides occur due to the gravitational force, whereas thunder lightning is an... View Article
In 1911, Earnest Rutherford, a scientist from New Zealand, overturned Thomson’s atomic model by his gold foil experiment. His experiment... View Article
The person is suffering from myopia and hence need a concave lens to correct the defect. The lens should be such that an object at infinity must... View Article
Option (d) Dissolved oxygen is not considered a water pollutant since dissolved oxygen is essential to aquatic plants and animals. Water... View Article
Receptors are present over all parts of the body, for example, in skin, eye, nose, tongue etc. They detect the signals and then send them to the... View Article
Answer: Yes, there can be displacement of an object in the absence of any force acting on it.  If a single force acts on an object,... View Article
Answer: (b)Â Benzene and Toluene Since both benzene and toluene are non-polar, operating intermolecular forces are almost similar. Hence, they... View Article
We know the saying that cleanliness is next to godliness. Keeping the surroundings clean is the prime factor that avoids the spread of many... View Article
Answer: iii) CHCl3 and Acetone CHCl3 and Acetone shows a negative deviation. Raoult’s law states that in a solution, the vapour pressure of a... View Article
Answer: Given parameters Speed of light in vacuum (c) = 3 × 108 ms-1 Refractive index of glass (ng) = 1.50 Find out The speed of light in... View Article
Force is defined as any effort that changes the state of motion or shape of an object. Thus, all the above situations require the application of... View Article
A plant with a long but weak stem, found in my neighbourhood, is a money plant. The stem of the money plant is thin, long and weak and spread on... View Article
Option A and C : A conjugate acid-base pair is a pair of acid and base which are formed by acid donating H+ ion to base which accepts it. Let's... View Article
Answer: Given Mass of the rifle (m1) = 4 kg Mass of the bullet (m2) = 50 g =Â 0.05 kg Recoil velocity of the rifle = v1 A bullet is fired... View Article