TRUE or FALSE for each of the following statements. (7 marks)
l. Write
(a) Alkali metals have stable electronic structures.
(b) A volume of gas contracts when cooled.
(c) The accuracy of a volumetric analysis depends upon the primary standard.
(d) A cathode is an electron donor.
(e) A common laboratory reducing agent is concentrated suiphuric acid.
(f) The effect of changing the pressure on reactions just involving liquids is negligible.
- Fill in the blanks with the correct word(s), phrase(s), term(s). unit(s), etc., as necessary.
(a) is used to protect the radiation.
(b) Stainless steel is tough and does not
(c) Nitrogen is obtained in industry by —-- distillation of liquid air.
(d) Sulphur has—--—— allotropic forms.
(e) Chlorine reacts with most compounds containing—-— (f) ofthe 0.001 M NaOH solution is
(g) alkenes give two products by the yeaction with HBr. (7 marks) - Select the correct word(s), notation(s), term(s), unit(s), etc., given in the brackets. (7 marks)
(g) All heats of neutralization are found to be exothermic.
(a) ICH3CH=CH2; CH3CH2Cl; CH3COOHj will undergo addition plymerization.
(b) Mass of an electron can be considered as [l amu; 2amu; negligible].
(c) One molecule of NC gas weighs [30g; 3g; 30 arnu]. (N=14, 0=16)
(d) The [amount of solute; amount of solvent; m61arityJ decreases on dilution.
(e) In the electrolysis ofmolten sodium chloride [graphite; platinum; copper) is used as anode.
(f) Oxidation number of potaksium in its compounds is always [+1 ; +2; +3).
(g) Roughly, the rate of reaction becomes double when the temperature is raised by (five; ten; twenty] degrees.