Ammonia burns in oxygen as shown below. If 240 cc of ammonia is burnt in 300 cc of oxygen, find out the composition of the resultant gaseous mixture at room temperature.

Differentiate between the following pairs based on the criteria given: (a) Sulphuric acid and Nitric acid (using barium chloride solution) (b) Unsaturated and Saturated hydrocarbons (type of bond present)

Define the following terms: (a) Molar volume (b) Normal salt

Name the main metal used in making of the alloys given below: (a) Duralumin (b) Stainless steel

An organic compound ‘X’ contains carbon, oxygen and hydrogen only. The percentage of carbon and hydrogen are 47.4% and 10.5% respectively. The relative molecular mass of ‘X’ is 76. Find the empirical formula and the molecular formula of ‘X’. [ Atomic weight: C = 12, O = 16, H = 1 ]

40 cm3 of methane (CH4) is reacted with 60 cm3 of oxygen according to the equation: CH4 + 2O2 ⟶ CO2 + 2H2O All volumes are measured at the same temperature and pressure. What total volume of gas remains after the reaction at room temperature? (a) 60 cm3 (b) 40 cm3 (c) 45 cm3 (d) 50 cm3

The reaction between concentrated sulphuric acid and magnesium can be represented by the equation given below: Mg + 2H2SO4 ⟶ MgSO4 + 2H2O + SO2 If 60 g of magnesium is used in the reaction, calculate: (a) mass of acid required. (b) volume of SO2 at STP. [Atomic weights: Mg = 24, H = 1, S = 32, O = 16]

State the terms for the following: (a) The group obtained by removing one hydrogen atom from the parent alkane. (b) Two metal plates or wires through which the current enters and leaves the electrolytic cell. (c) The amount of substance which contains the same number of units as the number of atoms in carbon-12. (d) The tendency of an atom to pull a shared pair of electrons towards itself in a compound. (e) The formula which represents the simplest ratio between the atoms of elements present in a compound.

(a) Give the IUPAC names of the organic compounds represented by the structural formulae given below: (b) Draw the structural diagram for the following organic compounds: 1. 3-methyl pentane 2. propyne 3. methanal

Complete the following sentences by choosing the correct answer from the brackets: (a) The salt that can be prepared by Direct Combination is ............... . [FeCl3 / FeCl2] (b) The metallic oxide which can be reduced by using common reducing agents is ............... . [Fe2O3 / Al2O3] (c) The metal nitrate which on thermal decomposition forms a black residue is ............... . [zinc nitrate / copper nitrate] (d) During the electrolysis of copper sulphate solution, if ............... is used as electrodes, the colour of the electrolyte does not fade. [copper / platinum] (e) The process of heating the concentrated ore in a limited supply or absence of air is ............... . [roasting / calcination]

Unsaturated hydrocarbons undergo: (a) Addition reaction (b) Substitution reaction (c) Oxidation reaction (d) Redox reaction

Identify the gas evolved in each of the following reactions: (a) Methane undergoes complete combustion. (b) Copper carbonate is heated. (c) MnO2 reacts with concentrated HCl.