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A electrovalent compound is made up of: (1) Electrically charged molecules (2) Neutral molecules (3) Neutral atoms (4) Electrically charged atoms or group of atoms
The frequency corresponding to transition n= 2 to n =1 in hydrogen atom is: (1) 15.66 x 10 10 Hz (2) 24.66 x 10 14 Hz (3) 30.5
Preparation of 2,2,6-trimethyl-5-phenylheptan-3-one: Safety 2-Bromopropane : Irritating to eyes, respiratory system and skin. If eye contact, wash with large volumes of
Line imperfection : Displacement with a curved boundary makes a mixed dislocation line at the boundary.
If molecular mass and atomic mass of sulphur are 256 and 32 respectively, its atomicity is: (1) 2 (2) 8 (3 )4 ( 4)16 Ans: 8
He- is p block element
i) Electrophillic substitution in case of aromatic amines takes place more readily than benzene. ii) Nitro compounds have higher boiling points than hydrocarbons having almost s
A chemical change takes place when one or more substances change into new substances. A chemical change is as well known as a chemical reaction. The emergence of new substances
in castner kelnar process sodium metal extract at cathode and calcium also why they do not mix if they extract at same chamber?
what is uniform electrical charge
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