2) An exothermic reaction involving two neutral gaseous reactants .
3) An element which does not lose, gain or share electrons and has two electrons in its valence shell .
4) A non metal in group 17[VIIA] of the periodic table, which is a solid at ordinary temperatures .
5) The salt formed when aluminium reacts with concentric sodium hydroxide solution.
6) The process involving hydrogen used in the manufacture of vegetable fat.
7) The type of oxide formed by the element in period 3 and group 13[IIIA].
8) The valency of calcium in calcium nitride.
9) An element other than hydrogen and chlorine which exists in isotopic form.
10) A lead salt which evolves reddish brown fumes on thermal decomposition.
11) The more electronegative element from the elements oxygen and sulphur present in group 16[VIA].
12) The law which states that the product of volume and pressure of a given mass of a dry gas is constant provided temperature remains constant.
13) The most reactive and the least reactive metal from the metal Na, Al, Cu, Ag.
14) The element in group 17[VIIA] of the periodic table which is a liquid at ordinary temperatures .
15) The period which contains 8 elements including the nonmetal sulphur.
16) The element in group 17 [VIIA] of the periodic table which bleaches vegetables dyes by oxidation.
17) A hectahydrate salt containing iron.
18) The most reactive element in group 16[VIA] of the periodic table.
19) The product obtained when nitrogen reacts with a neutral gas and the reaction is endothermic.
20) A nitride of a divalent metal.
21) The displaced product when zinc reacts with copper sulphate solution.
22) The colourless liquid obtained when the first element of group 14[IVA], reacts with the second element of group 16[VIA] of the periodic table.
23) The least reactive element in group 15[VA] of the periodic table.
24) The oxidation number of nitrogen in - nitric oxide.
25) A soluble salt formed by synthesis, when a trivalent metal, combines with a coloured acidic gas.
26) The salt formed when zinc reacts with caustic potash solution.
27) The law which state that--
a) The product of the volume and the pressure of a given mass of dry gas is constant-- temperature remaining constant.
b) The volume of a given mass of any gas is directly proportional to its absolute temperature -- pressure remaining constant.
c) In a chemical reaction, the total mass of the reacting substances is equal to the total mass of the products-- masses measured under similar conditions.
28) The temperature scale with absolute zero as its starting point .
29) An element which is inactive and present in traces in the atmosphere.
30) A secondary pollutant from the primary pollutant nitric oxide.
31) The gaseous product of boiling a sample of temporary hard water, containing soluble bicarbonates.
32) A a) positive radical b) negative radical -- both containing the element 'H'.
33) A metal which shows variable valency of
a) + 1 & +2
b) + 2 & +3
c) +2 & +4
34) The source of inorganic material in sewage waste water.
35) A combustible neutral gas which is a non-supporter of combustion.
36) In the reaction - 2KI + H₂O₂ --> WKOH + I₂. Name the oxidising agent & oxidised product.
37) The type of the chemical reactions seen in the chemical change-- Cl₂ + 2KBr --> 2KCl + Br₂.
38) A trivalent metal which reacts with steam laborating hydrogen.
39) The shell or energy level having a maximum of 8 electrons.
40) The atom which needs one electron to attain stable electronic configuration of the nearest noble gas - helium.
₂₂₂₂
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