State the terms for the following:

(a) Undistilled alcohol containing a large amount of methanol.

(b) A salt formed by the partial replacement of the hydroxyl group of a di-acidic or a tri-acidic base by an acid radical.

(c) Organic compounds having the same molecular formula but different structural formula.

(d) The tendency of an atom to attract the shared pair of electrons towards itself when combined in a compound.

(e) The type of covalent bond in which electrons are shared unequally between the combining atoms.

Complete the following sentences by choosing the correct word(s) from the brackets: (a) ............... solution forms a coloured precipitate with ammonium hydroxide which is soluble in excess of ammonium hydroxide. [Ferrous chloride / Copper nitrate] (b) Zinc blende is converted to zinc oxide by ................ [Calcination / Roasting] (c) ............... conducts electricity by the movement of ions. [Molten iron / Molten sodium chloride] (d) The reaction that takes place at the anode during the electrolysis of aqueous Sodium argentocyanide with silver electrodes is ................ [Ag ⟶ Ag+ + e-/ Ag+ + e- ⟶ Ag] (e) The salt formed when ZnO reacts with hot concentrated NaOH is ............... . [sodium zincate / zinc hydroxide]

(a) Draw the structural diagram for the following organic compounds: 1. 2-methyl propene 2. butanal (b) Give IUPAC name for the following organic compounds:

Given below are organic compounds labelled A to F. Answer the questions that follow: (a) Which compound forms a single product with bromine? (b) Which two compounds have the same molecular formula? (c) Which two compounds will react together in the presence of concentrated H2SO4 to form a product with a fruity smell?

(a) State Avogadro’s Law. (b) Define Co-ordinate bond.

Study the table given below. Use only the letters given in the table to answer the questions. Do not identify the elements. IA IIA IIIA IVA VA VIA VIIA 0 E J Q L G M D P N (a) State the valency of element ‘G’. (b) Which element can exhibit catenation? (c) Write the formula of the compound formed between ‘M’ and ‘P’.

Given below are four ions: Cl−, Li+, Al3+, K+ Identify the pair of ions which have the same electronic configuration. [Atomic number: Cl = 17, Li = 3, Al = 13, K = 19] (a) Cl− & Li+ (b) Al3+ & K+ (c) Cl− & K+ (d) Li+ & K+

Match the Column A with Column B: Column A Column B (a) N2 + 3H2 ⇌ 2NH3 1. Vanadium Pentoxide (b) 4NH3 + 5O2 ⟶ 4NO + 6H2O 2. Nickel (c) 2SO2 + O2 ⇌ 2SO3 3. Iron (d) C2H4 + H2 ⟶ C2H6 4. Concentrated Sulphuric acid (e) CuSO4.5H2O ⟶ CuSO4 + 5H2O 5. Platinum

Draw the dot and cross structure of the following: (a) An ionic compound formed when Mg reacts with the dilute HCl. (b) A covalent compound formed when H2 reacts with Cl2. (c) The positive ion produced when ammonia gas is dissolved in water. [ Atomic number: Mg = 12, Cl = 17, H = 1, N = 7 ]

The atomic number of two atoms ‘X’ and ‘Y’ are 14 and 8 respectively. State: (a) the period to which ‘X’ belongs. (b) the formula of the compound formed between ‘X’ and ‘Y’. (Do not identify X and Y)

Assertion (A): The tendency of losing electrons increases down the Group. Reason (R): The most reactive metal is placed at the top of Group 1. (a) Both (A) and (R) are true, and (R) is the correct explanation of (A). (b) Both (A) and (R) are true, and (R) is not the correct explanation of (A). (c) (A) is true but (R) is false. (d) (A) is false but (R) is true.

Which pair of reactants can be best used to produce lead (II) sulphate? (a) Sulphuric acid + Lead (b) Sulphuric acid + Lead hydroxide (c) Sodium sulphate + Lead nitrate (d) Potassium sulphate + Lead oxide

P, Q, R and S are the different methods of preparation of salts. P – Simple displacement Q – Neutralisation by titration R – Precipitation S – Direct combination Choose the most appropriate method to prepare the following salts: (a) PbCl2 (b) FeCl3 (c) Na2SO4