The change in colour of the moist litmus paper in the given set up is due to

Review some of the key properties of ammonia and give students the opportunity to produce ammonia themselves in this class practical. The experiment provides a useful precursor to the Because ammonia has a strong smell and is poisonous in quantity, pupils should ideally carry out this experiment in fume cupboards. Alternatively, provided that the quantities of reactants are no greater than as stated here, the experiment could be carried out in awell-ventilatedlaboratory. Depending on arrangements for setting up and clearing away, the experiments should take around 30 minutes. Equipment Apparatus • Eye protection • Retort stand, boss and clamp • Boiling tube with stopper and delivery tube (see diagram below) – this apparatus must be dry • Boiling tubes, x2 – must be thoroughly dry • Beaker, 100 cm 3 • Beaker, 250 cm 3 or larger • Bunsen burner • Heat resistant mat • Spatula Chemicals • Ammonium chloride (HARMFUL) • Calcium hydroxide (IRRITANT) • Calcium oxide (CORROSIVE) – optional • Concentrated hydrochloric acid (CORROSIVE) • Red litmus paper • Blue litmus paper • Universal indicator paper Health, safety and technical notes • • Wear eye protection throughout.Ammonia gas is TOXIC and DANGEROUS FOR THE ENVIRONMENT and pungent-smelling and must not be inhaled. The experiments must only be carried out in a fume cupboard or in a well-ventilated laboratory. • Ammonia gas, NH 3 (g), (TOXIC, DANGEROUS FOR THE ENVIRONMENT) – see CLEAPSS Hazcard HC005. Ammonia is a very soluble gas...

Views: 5,652 (A) Observe that the iron fillings are arranged in concentric circular paths with wire at the centre. (B) Close the circuit. (C) Tap the card board. (D) Sprinkle some iron fillings on the card board. (E) Connect the wire to a battery and key. (F) Pass a wire through the centre of a rectangular shaped card board. The change in colour of the moist litmus paper in the given set up is due to i. presence of acid ii. presence of base iii. presence of H + ( aq ) in the solution iv. presence of Litmus which acts as an indicator Updated On Mar 4, 2023 Topic Chemistry Subject Science Class Class 10 Answer Type Video solution: 7 Upvotes 834 Avg. Video Duration 12 min