Among the halogens the rare element is________________?
Among the halogens the rare element is________________?
A. Fluorine
B. Chlorine
C. Astatine
D. Iodine
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Arsenic oxides are removed by passing through_________________?
Arsenic oxides are removed by passing through_________________?A. Ferric hydroxide
B. Sodium hydroxide
C. Calcium hydroxide
D. Aluminium hydroxideA technique of partition chromatography in which the solvent is in a pool at the bottom of container_______________?
A technique of partition chromatography in which the solvent is in a pool at the bottom of container_______________?A. Adsorption chromatography
B. Ascending chromatography
C. Radial chromatography
D. Descending chromatographySolubility of KCIO3 gives__________________?
Solubility of KCIO3 gives__________________?A. continuous and falling solubility curve
B. discontinuous and falling solubility curve
C. continuous and rising solubility curve
D. discontinuous and rising solubility curveNylon is obtained by heating___________________?
Nylon is obtained by heating___________________?A. Acrylic acid
B. Epichlorohydrin
C. Vinyl chloride
D. Adipic acid with hexamethylene diamineThe value of activation energy is primarily determined by_______________?
The value of activation energy is primarily determined by_______________?A. Temperature
B. Effective collision
C. Concentration of reactants
D. Chemical nature of reactants and productsNitrates of which pair of elements give different products on thermal decomposition ?
Nitrates of which pair of elements give different products on thermal decomposition ?A. Na K
B. Mg Ca
C. Li Na
D. Li Ca