Using suitable chemicals from the box, write balanced chemical equations for the preparation of the following salts: Lead (II) carbonate, Copper (II) chloride, Iron (II) chloride.
Show Hint
Solution and Explanation
(a) Lead (II) carbonate: (Prepared via double decomposition/precipitation) [ Pb(NO_3)_2 + Na_2CO_3 PbCO_3downarrow + 2NaNO_3 ]
(b) Copper (II) chloride: (Prepared via action of acid on a carbonate) [ CuCO_3 + 2HCl CuCl_2 + H_2O + CO_2uparrow ] (c) Iron (II) chloride: (Prepared via direct synthesis/combination) [ Fe + 2HCl FeCl_2 + H_2uparrow ] Note: Iron reacting with dry Chlorine would produce Iron (III) chloride, so dilute HCl is used for the (II) state.
Top ICSE Class X board Chemistry Questions
- A non-metal which reacts with concentrated sulphuric acid to form two gases which turn lime water milky is ______.
Which of the following element pairs will form an ionic bond?
- The electronic configuration of an element is 2,8,2. The hydroxide of this element can produce ______ hydroxyl ions per molecule.
- With respect to the electrolysis of copper (II) sulphate solution using copper electrodes, which statement is correct?
- Identify the equation that shows the reaction of ethane with chlorine in the presence of ultraviolet light.
Top ICSE Class X board Occurrence Of Metals Questions
- The method which cannot be used for the preparation of copper salts is:
Given below is the industrial process for the manufacture of ammonia gas. Study the schematic diagram to answer the following questions.
(a) Name the process.
(b) Which catalyst is used in the above process?
(c) In the above diagrammatic setup, how is ammonia gas separated from the unreacted gases to obtain liquid ammonia?
(d) Which two properties of ammonia gas can be demonstrated by the Fountain Experiment?
- Alex was given a solution of an unknown salt Y for analysis. He performed the following tests and recorded his observations:
• To a part of the solution Y, he added silver nitrate solution and obtained a white precipitate which was soluble in ammonium hydroxide solution.
• To the remaining solution he added a few drops of sodium hydroxide solution and obtained a pale blue precipitate.
Based on the observations made by Alex, identify:
(a) the anion and
(b) the cation present in salt Y.
Study the reaction given below and answer the questions that follow:
NaNO₃ + H₂SO₄ → NaHSO₄ + HNO₃ (below 200°C)
(a) Give one reason for maintaining the temperature below 200°C.
(b) Why is concentrated Sulphuric acid used in the above reaction?
Study the reaction scheme shown below and identify the reactants A, B and C.
Top ICSE Class X board Questions
- "स्वस्थ जीवन के लिए संतुलित भोजन, व्यायाम तथा खेलकूद बहुत आवश्यक होता है" इस विषय को आधार बनाते हुए एक लेख लिखिए।
- पुस्तकालय (Library) का हमारे जीवन में बहुत महत्व होता है। आप अपने विद्यालय के पुस्तकालय में जाकर किस प्रकार की पुस्तकों को पढ़ना पसंद करते हैं। अपनी प्रिय पुस्तक का वर्णन करते हुए लेख लिखिए।
- अच्छी संगति हमारे जीवन में अनेक बदलाव ला सकती है। हम अक्सर अपने मित्रों की बातों से प्रभावित होकर उनका अनुकरण (follow) करने लगते हैं। अच्छी संगति के लाभ बताते हुए एक सारपूर्ण लेख लिखिए।
- ‘मैंने यह निर्णय लिया कि भविष्य में ऐसी गलती दुबारा नहीं होगी’ इस वाक्य से अंत करते हुए अपने जीवन की कोई यादगार घटना या मौलिक कहानी लिखिए।
नीचे दिए गए चित्र को ध्यान से देखिए और चित्र को आधार बनाकर कोई लेख, घटना अथवा कहानी लिखिए जिसका सीधा व स्पष्ट संबंध चित्र से होना चाहिए।
