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Disinfectants:
The chemical substances that are employed to kill microorganisms although they cannot be applied on living tissues are known as disinfectants. Hence, disinfectants as well kill micro organisms but these are not safe for living tissues. Disinfectants play a major part in water treatment and in public health sanitation. These are majorly applied to inanimate objects like instruments, floors etc.
Similar substance can act as disinfectant also antiseptic depending on its concentration. For instance, a 0.2% solution of phenol works as antiseptic and its 1% solution work as disinfectant.
Manufacture of acetic acid - Quick vinegar process (a) From ethyl alcohol (Quick vinegar process): Vinegar is 6-10% aqueous solution of acetic acid. It is acquired by fermen
Matter is anything that has mass and takes up space. The term matter refers to all the materials, or "stuff," making up the universe. Everything you see around you is matter. The c
classification of gels
The following has zero valency : (1) Sodium (2) Beryllium (3) Aluminium (4) Krypton Ans: Krypton
why ionisation energy of aluminium is greater then Ga?
The electronic configuration 1s 2 , 2s 2 , 2p 1 x , 2p 1 z : (1) Oxygen (2) Nitrogen (3) Hydrogen (4) Fluorine Ans: Nitrogen
what is grignard reagent
The energy that opposes dissolution of a solvent is: (1) Hydration energy (2) Lattice energy (3) Internal energy (4) Bond energy Ans: B
Rancidification - chemical properties of oils and fats On long storage in contact along with air and moisture, oils and fats develop unlikable smell. The process is termed as r
what are the subatomic particles present in an atom?
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