Chemistry
1-The small molecular building units are called Monomers
2- Bases are chemical compounds that taste bitter, turn litmus blue and feel slippery
3-Liquified Petroleum Gas is a mixture of hydrocarbons containing three or four carbon atoms, such as propane, butane and pentane.
4-The substance, which produce heat and light on combustion are called fuels.
5- Catalyst is a material that is added to a reaction mixture to accelerate the process but is itself not consumed.
6-An Atom is the smallest unit of an element.
7-Everything in the universe is made of a combination of a few basic substances called elements.
8- Acids are chemical compounds that taste sour, turn litmus red, and often react with some metals to produce hydrogen gas.
9-Lavoisier , a French Chemist is regarded as the Father of Modern Chemistry.
10-The Boiling Point of water is 373 K.
11-Boiling Point is a temperature at which the vapour pressure of the liquid is equal to atmospheric pressure.
12-The Fundamental Particles of an Atom are Electron, Neutron, and Proton.
13-Atoms of the Elements having same atomic number but different mass number is called as Isotopes.
14-Acetic Acid is present in Vinegar
15-Atom of Hydrogen is the smallest and lightest
16-Hydrogen (H) is the first element of the periodic table (upper left corner). It only has one electron and one proton.
17- Atomic Mass Unit, “amu” is the abbreviation for the units used to measure the masses of elements.carbon (C) has a value of 12.011 amu
18-Diamond is the only pure substance that could form crystals
19-The average adult human body contains about 250 grams of salt, which is just over half a pound. If you don’t have enough salt, your body suffers an electrolyte imbalance called hyponatremia.
20-The symbol Sb stands for stibnum or stibnite. What is the modern name of this element
Ans-Stibnum is the old name for antimony.
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