Four students, (A), (B), (C) and (D) observed the colour and solubility of iron, sulphur and iron sulphide in carbon disulphide. The tick mark (✓) represents 'soluble', and cross mark (×) represents 'insoluble' in carbon disulphide. Their observations are tabulatedbelow :

AcademicChemistryNCERTClass 10 Correct answer: (3) (C) Explanation: Iron is extracted, it is of grey color, it reacts with yellow sulphur to form greyish black iron sulphide. From the following table, it can be concluded that only sulfur is soluble in carbon disulfide solution. Hence, student C is correct.  Tutorialspoint Simply Easy Learning Updated on: 10-Oct-2022 40 Views Related Articles How will you separate a mixture of iron fillings and sulphur powder without using carbon disulphide? The chemical which can be used to separate a mixture of carbon powder and sulphur powder successfully is :(a) carbon dioxide (b) hydrochloric acid(c) hydrogen sulphide (d) carbon disulphide Refractive indices of water, sulphuric acid, glass and carbon disulphide are 1.33, 1.43, 1.53 and 1.63 respectively. The light travels slowest in:(a) sulphuric acid (b) glass (c) water (d) carbon disulphide Which of the following are not compounds?(a) Chlorine gas(b) Potassium chloride(c) Iron(d) Iron sulphide(e) Aluminium(f) Iodine(g) Carbon(h) Carbon monoxide(i) Sulphur powder Translate the following statements into chemical equations and then balance the equations:(a) Hydrogen sulphide gas burns in air to give water and sulphur dioxide.(b) Phosphorus burns in oxygen to give phosphorus pentoxide.(c) Carbon disulphide burns in air to give carbon dioxide and sulphur dioxide.(d) Aluminium metal replaces iron from ferric oxide, Fe2O3, giving aluminium oxide and iron.(e) Barium chloride reacts with zinc sulphate to give zinc chloride and barium sulphate. Refractive indices of carbon disulphide and ethyl alcohol are 1.63 and 1.36 respectively. Which is optically denser? Four students observed the colour and odour of acetic acid and its reaction with sodium hydrogencarbonate. They tabulated their observations as given below. Classify the following as elements or compounds:Iron, Iron sulphide, Sulphur, Chalk, Washing soda, Sodium, Carbon, Urea A mixture of sulphur and carbon disulphide is :(a) heterogeneous and shows Tyndall effect(b) homogeneous and shows Tyndall effect(c) heterogeneous and does not show Tyndall effect(d) homogeneous and does not show Tyndall effect Four gas jars filled with sulphur dioxide gas were inverted into troughs of water by four students and the following observations and inference were reported:(a) Water did not enter the gas jar and sulphur dioxide is insoluble in water. (b) A small amount of water entered the gas jar slowly and sulphur dioxide is sparingly soluble in water.(c) Water rushed into the gas jar and sulphur dioxide is highly soluble in water.(d) Water did not enter the gas jar and sulphur dioxide is soluble in water. The correct set of observations and inference drawn is reported in :(1) (a)(2) (b)(3) (c)(4) (d)" Carbon exists in the atmosphere in the form of(a) carbon monoxide only(b) carbon monoxide in traces and carbon dioxide(c) carbon dioxide only(d) coal Two elements X and Y have valencies of 5 and 3, and 3 and 2, respectively. The elements X and Y are most likely to be respectively :(a) copper and sulphur (b) sulphur and iron(c) phosphorus and nitrogen (d) nitrogen and iron Aqueous solutions of zinc sulphate and iron sulphate were taken in the test tubes I and II by four students. A, B, C, and D. Metal pieces of iron and zinc were dropped in the two solutions and observations made after several hours and recorded in the form of a table as given below: Calculate the molecular masses of the following compounds:(a) Hydrogen sulphide, H2S(b) Carbon disulphide, CS2(Atomic masses: H = 1 u, S = 32 u, C = 12 u) Aqueous solutions of zinc sulphate and iron sulphate were taken in test tubes I and II by four students A, B, C, and D. Metal pieces of iron and zinc were dropped in the two solutions, and observations made after several hours were recorded in the form of a table as given below: Kickstart Your Career Get certified by completing the course Get Started Print Page Previous Next Advertisements