What is a decomposition reaction?
Answer: In a decomposition reaction, a single reactant decomposes to form a number of products. A decomposition reaction can be defined... View Article
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What do you mean by ear ossicles?
The ear ossicles are the three smallest bones in the human body, the malleus, the incus and the stapes, and they help in... View Article
Give an example of a noble metal.
Answer: When exposed to moisture, noble metals are resistant to oxidation and corrosion. Noble metals are resistant to acid attack.... View Article
When an ideal solution is formed? (1) When its components have no volume change on mixing (2) When its components have no enthalpy change on mixing (3) When its components have both the above characteristics (4) When its components have high solubility.
Answer: (3) When its components have both the above characteristics An ideal solution is a mixture in which the molecules of... View Article
What are the components of xylem?
Answer: Xylem is the tissue that helps in the transport of water and dissolved substances throughout the plant. Xylem is... View Article
Why water is never added to acid?
The reaction of acid and water is an exothermic reaction since a lot of heat is liberated during the reaction.... View Article
Where do we use roasting process?
Answer: Roasting is done generally in the case of sulphide ores. Roasting process Roasting is a metallurgical process in which... View Article
Do animal cells have a cell wall?
Answer: Cell wall is present in plants, but absent in animals. Cell wall A cell wall is defined as a... View Article
When do we say that work is done?
Answer: Work is said to be done when a force applied to an object moves that object. We can calculate work... View Article
What is a Friedel Crafts reaction?
Answer: Friedel Crafts reaction is an electrophilic substitution reaction. The two primary types of Friedel-Crafts reactions are the alkylation and... View Article
Mention any two facts about ferns.
Fern is an avascular, seedless plant that belongs to the group Pteridophyta. There are about 12 000 types of ferns... View Article
What causes the lustre of a metal?
The lustre of a metal is due to the presence of mobile (free) electrons in it. Explanation The free electrons... View Article
From where minerals are extracted?
Answer: The minerals from which metals can be profitably extracted are called Ores. Extraction of metals Mining is the method... View Article
What is the charge on an electron?
Answer: 1.6 x 10-19 coulomb is the charge on an electron. What is an electron? An electron is a subatomic... View Article
How far is the Sun from the Earth?
Answer: The distance between the sun and the earth is 150.82 million km. The distance is referred to as one... View Article
What is the unit of bond enthaply?
Answer: Bond Enthalpy is a quantity that offers insight into the strength of a chemical bond and, by extension, its... View Article
Give an example of coordinate bond
Answer: A co-ordinate bond is a type of alternative covalent bond formed when an electron pair from a single atom... View Article
List the different parts of flower.
A complete flower is the one that consists of sepals, petals, stamens and pistil. On the contrary, an incomplete flower... View Article
What is the unit of phase constant?
Answer: It is a dimensionless quantity with unit radians as it is an angle. Phase constant The phase constant, also... View Article
Give an example of a bad conductor.
Answer: Insulators, also known as bad conductors, are materials that prevent electrons from freely flowing from one element’s particle to... View Article
