Answer: Gold, silver, platinum, etc occur in free state. Since Gold, Platinum and Silver are the least reactive metals, hence they are found in... View Article
Answer: Heat loss due to conduction is prevented by placing the calorimeter box in a well-lagged vessel using wool or cork material. Heat loss... View Article
Answer: Corrosion in case of iron is known as rusting. Rusting of iron refers to the formation of rust, a mixture of iron oxides, on the... View Article
Answer: Ionic compounds can be defined as the crystalline solids formed by neatly packed ions of opposite charge. Ionic compounds are usually... View Article
Answer: A homopolymer is defined as a polymer that has the same monomer unit in the chain. The addition polymers formed by the polymerisation of... View Article
Answer:Â Charles Edward Brown-Sequard In 1856, Charles Edward Brown-Sequard, a physician, made his first significant contribution to the field of... View Article
Answer: The least count of an instrument is the smallest measurement that can be taken accurately with it. The least count of a stop watch is... View Article
Answer: A tuning fork is made of an alloy of steel, nickel and chromium, called Elinvar. The material for which the elasticity does not... View Article
Answer: One Faraday is the charge carried by 1 mole of electrons which is 96485.34 Coulombs. The faraday constant can be expressed in terms of... View Article
Answer: The base has a bitter taste and a slippery texture. A base dissolved in water is called an alkali. When chemically reacting with acids,... View Article
With many other elements, carbon forms numerous compounds; these compounds are termed as carbon compounds. Methane (CH4) is the fundamental... View Article
Answer: Electrolytic refining method is used to refine impure metals. Electrolytic refining is a technique that is used for the extraction and... View Article
Answer:Â Acids turn blue litmus paper to red. Litmus paper is a type of paper that changes colour in response to the acidity of the solution it... View Article
There are 2 types of motion: Rotation and revolution. A rotation is a circular movement of an object around a centre of rotation. The spinning... View Article
Answer: Be and Al compounds are largely covalent because of high charge density leading to high polarizing power of the cations. An ionic bond... View Article
Answer: Uttar Pradesh The largest wheat producing state in our country is Uttar Pradesh. Uttar Pradesh stands fourth as per area and first... View Article
Answer: (2) NCl5 Nitrogen does not have d orbitals to expand its covalence beyond four. Since phosphorus and arsenic have d-orbitals, they... View Article
Answer:Â Collenchyma tissue is a living, flexible, simple permanent tissue. A group of cells along with intercellular substances that perform a... View Article
