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Write TRUE or FALSE for each of the following statements. (7 marks)
(a) The ‘d’ sub shell can have the minimum number of 10 electrons.
(b) The gas spread itself uniformly throughout any containers.
(c) Indicators are required in all types of titrations.
(d) Solid sodium chloride conducts electricity.
(e) Reduction brings about a decrease in oxidation number.
(f) Catalysts are not consumed by the chemical reactions.
(g) The reaction between joule and calorie is `1J=4.18 cal.

1. Fill in the blanks with the correct word(s) ,terms. (7 marks)
   (a) Sodium hydroxide is commercially produced from saturated solution of ………. by using electrolysis.
   (b) The properties of steel depend upon the ……….. .
   (c) Ammonia gas has a characteristic ………. smell.
   (d) Hydrogen sulphide has weak ………. properties.
   (e) Halogens have essential electronic structure of ………. .
   (f) In the reaction with ammonia, boron trifluoride behave as an ………. .
   (g) The IUPAC name of di-methyl methylene is ………. .
2. Select the correct word(s) given in the bracket. (7 marks)
   (a) Proteins is ( polymer, copolymer, monomer).
   (b) The molecule of (NH3, ClF3, BCl3) does not deviate octet rule.
   (c) The volume of the gas decreases (rapidly, slowly, regularly) with regular decrease of temperature.
   (d) The anhydrous sodium carbonate can be used as a (an) (indicator, catalyst, primary standard)
   (e) Faraday’s laws express the (qualitative, quantitative, volumetric) results of electrolysis.
   (f) Oxidation number of sulphur in H2SO3 is ( +6,+4,-2) .
   (g) Light is a source of (force, pressure, energy).
3. Match each of the items in List A with the appropriate items in the list B. (7 marks)
   List A List B
   (a) Neutralization (i) it dissolves in noble metal gold
   (b) Alum (ii) CaO Cl2.2 H2O
   (c) Ammonium iron (II) sulphate (iii) show allotropy
   (d) Aqua-regia (iv) reaction between any acid and a base
   (e) Sulphur (v) dissociation constant of the indicator
   (f) Bleaching powder (vi) K2SO4. Al2(SO4)3.24 H2O
   (g) Kin (vii) (NH4)2 SO4.FeSO4.6H2O
4. Define the following terms. (8 marks)
   (a) Electron affinity