Name the metal which is found in free state.
Answer: Gold, silver, platinum, etc occur in free state. Since Gold, Platinum and Silver are the least reactive metals, hence they... View Article
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How is heat loss prevented in a calorimeter?
Answer: Heat loss due to conduction is prevented by placing the calorimeter box in a well-lagged vessel using wool or... View Article
What is the term used for corrosion of iron?
Answer: Corrosion in case of iron is known as rusting. Rusting of iron Rusting of iron refers to the formation... View Article
Give an example of ionic compound formation.
Answer: Ionic compounds can be defined as the crystalline solids formed by neatly packed ions of opposite charge. Ionic compounds... View Article
Define and give an example of a homopolymer.
Answer: A homopolymer is defined as a polymer that has the same monomer unit in the chain. The addition polymers formed... View Article
Who is known as the father of endocrinology?
Answer: Charles Edward Brown-Sequard In 1856, Charles Edward Brown-Sequard, a physician, made his first significant contribution to the field of endocrinology.... View Article
The least count of a stop watch is generally_______
Answer: The least count of an instrument is the smallest measurement that can be taken accurately with it. The least... View Article
What material is tuning fork made of and why?
Answer: A tuning fork is made of an alloy of steel, nickel and chromium, called Elinvar. The material for which... View Article
What is charge on one mole electron known as?
Answer: One Faraday is the charge carried by 1 mole of electrons which is 96485.34 Coulombs. The faraday constant can... View Article
What happens when a base reacts with a metal?
Answer: The base has a bitter taste and a slippery texture. A base dissolved in water is called an alkali.... View Article
Why are the number of carbon compounds large?
With many other elements, carbon forms numerous compounds; these compounds are termed as carbon compounds. Methane (CH4) is the fundamental... View Article
Which method is used to refine impure metals?
Answer: Electrolytic refining method is used to refine impure metals. Electrolytic refining Electrolytic refining is a technique that is used... View Article
When does the colour of blue litmus turn red?
Answer: Acids turn blue litmus paper to red. Litmus paper is a type of paper that changes colour in response to... View Article
How is the speed of 90 km/h expressed in m/s?
Answer: 25 m/s We know that, 1 hour =3600 1 km = 1000 m Let us convert km/h to m/s, we... View Article
How many types of motion does the Earth have?
There are 2 types of motion: Rotation and revolution. Rotation A rotation is a circular movement of an object around... View Article
How are genetically modified plants produced?
Genetically modified plants can be formed by transferring desired gene from some other source. This source may or may not... View Article
Why are Be and Al compounds largely covalent?
Answer: Be and Al compounds are largely covalent because of high charge density leading to high polarizing power of the... View Article
Which state is the largest producer of wheat?
Answer: Uttar Pradesh The largest wheat producing state in our country is Uttar Pradesh. Uttar Pradesh stands fourth as per... View Article
Which one of the compound is not known? (1) NCl5 (2) PCl5 (3) AsCl5 (4) NCl3
Answer: (2) NCl5 Nitrogen does not have d orbitals to expand its covalence beyond four. Since phosphorus and arsenic have... View Article
Describe the structure of collenchyma tissue.
Answer: Collenchyma tissue is a living, flexible, simple permanent tissue. A group of cells along with intercellular substances that perform a... View Article
