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As compared to covalent compounds, electrovalent compounds generally have:
(1) Low melting points and low boiling points
(2) Low melting points and high boiling points
(3) High melting points and low boiling points
(4) High melting points and high boiling points
Ans: High melting points and high boiling points
A covered glass tube contains 2.25g of copper and 3.32g of sulphur. The mass of the tube as well as its contents is 18.48 g. Upon heating a chemical reaction forms copper(II) sulph
Drying of Organic Substances- purification of organic compounds Several solids are dried first by pressing them gently in between folds of filter papers. Compounds that neither
what are the topics which are covered under the assignment of de broglie hypothesis?
calculate the molarity of sodiun in 0.66ml water
The mass of CaCl2 (molar mass= 111.0) required to prepare 75.00 milliliters of a 2.000 molar solution of this salt is?
formula of acetic acid
What are the Stages of heat treatment process All heat treatment processes comprises 3-main steps: (i) Heating of metal/alloy to the predetermined (definite) temperature.
1. Enter the symbol of a sodium ion, Na+, followed by the formula of a sulfate ion, SO42- ..Express your answers as ions separated by a comma. 2.Enter the expression 147N+a, wher
In hydrogen spectrum the different lines of Lyman series are present is : (1 )UV field (2) IR field (3) Visible field (4) Far IR field Ans: UV field
chemical bonding
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