(Answer ALL Questions)
1.Write TRUE or FALSE for each of the following statements. (7 marks)
(a) A metallic bonding is observed in metals.
(b) One molecule of hydrogen weigh 2g.(H=1)
(c) Equavalent point and end point are indentical in all types of titration.
(d)Metals are good insulators of electricity.
(e)Oxidation number of hydrogen in hydrogen peroxide is one.
(f) More amount of product would be obtained by using a proper catalyst.
(g) An endothermic process may be used as a cooling system.
II.Fill in the blanks with the correct word(s), phrase(s), term(s),unit(s),etc as necessary.(7marks)
Reactive metals are usually manufactured by ______.
The formula of blue copper II sulphate is ______.
Dinitrogen oxide is used as anesthetic for minor operation and is given the name_____ gas.
A charged particle is a (an) ______.
STP means ______.
A molar solution dissolves ______ of solute in 1 dm3 of the solution.
Cation is reduced at the _____.
III.Select the correct word(s),notation(s), unit(s),etc given in the brackets. (7 marks)
The atom without neutrons is ( hydrogen,helium,caesium).
Boyle’s law can be expressed as ( v=1/p , pv= constant,p/v=constant)
An indicator indicates the (equavalent point,end point,stoichiometric amount of reactants)
Electrolytes can conduct due to the movement of (ions, electrons, molecules).
Oxidation number of oxygen in H2SO4 is (-1, 0, -2).
A catalyst is a substance which (change,alters,does not change) the rate of chemical reaction.
Effect of pressure on (solids, vapours, gases) is negligible.
IV.Match each of the items in list A with the appropriate items given in list B. (7 marks)
List A List B
Heat liberated by a reaction (i) brass
Caustic soda (ii)test for solubility of a ammonia
Alloy of copper (iii)Fe3O4
Fountain experiment (iv)due to the position of the a body
Potential energy (v)assigned by a regative sign
Magnetite (vi)Na2CO3
Soda ash (vii)NaOH