On placing a copper coin in a test tube containing green ferrous sulphate solution, it will be observed that the ferrous sulphate solution

Views: 6,065 HCl gas in her school laboratory using certain che puts both dry and wet blue litmus papers in contact with the gas. (i) Name the reagents used by Sugandha to prepare HCl gas. (ii) State the colour changes observed with the dry and wet blue litmus pay, 16. (a) Draw the sectional view of human heart Name and label the followin Views: 5,478 X is used for white washing:- (i) Name the substance X and yrte its (ii) Write the chemical reaction of the substance X with water. Q.9-A shiny brown coloured element X on heating in air becomes black in colour:- (i) Name the elemeht X and the btack coloured compound formed. (ii) Write the chémical reaction of the substance X on heating in air. Views: 5,013 HCl gas) does not show acidic behaviour but when some water is present, then its acidic behaviour can be observed. Let us describe the experiment now: (2) Take about 1 gram solid sodium chloride ( NaCl ) in a clean and dry boiling tube and add some coscentrated sulphuric acid to it very catrefully [see Figure 20(a)]. Fit a rubber cork with delivery take in the mouth of the boiling tube as shown in Figure 20 ( b ). Concentrated sulp) roksts with sodium chloride to form hydrogen chloride gas. The hydrogen chloride gas st out of the ogen end of the glass tube.

5 $\begin$ 7 The formulae of four organic compounds are shown below. Choose the correct option Views: 5,303 5% alkaline potassium permanganate solution is added drop by drop to warm propyl alcohol (propanol) taken in a test tube? Explain with the help of a chemical equation. (2) SECTION - C 6. What are fossils? Describe briefly two methods of determining the age of fossils. 7. What is the cause of dispersion of white light through a glass prism? Draw a ray diagram to show Views: 5,853 ® Exam Tutor 13. द्विविस्थापन अभिक्रियाओं से आप क्या समझते हैं ? एक उदाहरण (रसायनिक समीकरण) दीजिए। 14. विरंजक चूर्ण का रासायनिक सूत्र क्या है ? इसकी निर्माण विधि का रासायनिक समीकरण दीजिए। प्र० 3 → 99 हैge 15. आधुनिक आवर्त सारणी के आवर्त में बायीं से दायीं ओर जाने पर धात्विक गुण किस प्रकार परिवर्तित होता है ? कारण लिखिए। 16. (i) धातुओं के अम्लों से अभिक्रिया करने से क्या होता है ? एक उदाहरण दीजिए। (i4) सक्रियता श्रेणी का उदाहरण सहित वर्णन कीजिए। 17. (i) निम्न यौगिकों का नामकरण कीजिए : 1 × 3 = 3 P 2 (a) CH 3 ​ − C − OH (b) CH 3 ​ − CH 2 ​ − Cl (c) CH 3 ​ − CH 2 ​ − OH (ii) समजातीय श्रेणी क्या होती है ? उदाहरण के साथ समझाइए। अथवा 3 साबुन की सफाई प्रक्रिया की क्रियाविधि का वर्णन कीजिए।

NCERT Solutions for Class 10 Science Chapter 6 Multiple Choice Questions Mcqs are provided here with simple step-by-step explanations. These solutions for Multiple Choice Questions Mcqs are extremely popular among Class 10 students for Science Multiple Choice Questions Mcqs Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the NCERT Book of Class 10 Science Chapter 6 are provided here for you for free. You will also love the ad-free experience on Meritnation’s NCERT Solutions. All NCERT Solutions for class Class 10 Science are prepared by experts and are 100% accurate. Question 3: When an aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change which is observed is: (1) light green solution slowly turns colourless (2) the lower end of the test tube becomes slightly warm (3) a colourless gas with smell of burning sulphur is observed (4) light green solution changes to blue Answer: Aluminium is more reactive than iron hence will displace iron from the solution, sowhen an aluminium strip is kept immersed in freshly prepared light green colored ferrous sulphate solution, aluminium displaces iron from iron sulphate and forms blue colored aluminium sulphate. 2 Al ( s ) + 3 FeSO 4 ( aq ) → Al 2 ( SO 4 ) 3 ( aq ) + 3 Fe ( s ) Hence, the correct answer is option 4. Page No 310: Question 7: Ethanoic acid was added to sodium hydrogen-carbonate solution and the gas ev...

\hline \end 5 On placing a copper coin in a test tube containing green ferrous sulphate solution, it will be observed that the ferrous sulphate solution • turns blue, and a grey substance is deposited on the copper coin. • turns colourless and a grey substance is deposited on the copper coin. • turns colourless and a reddish-brown substance is deposited on the copper coin. • remains green with no change in the copper coin. Views: 5,405 X and Y are distributed in three shells having 1 and 7 electrons respectively in their outermost shells. (a) Write the group numbers of these elements in the Modern Periodic Table. (b) Write the molecular formula of the compound formed when X and Y combine with each other. (c) Which of the two is electropositive? \hline \end 5 On placing a copper coin in a test tube containing green ferrous sulphate solution, it will be observed that the ferrous sulphate solution Updated On Feb 12, 2023 Topic Chemistry Subject Science Class Class 10 Answer Type Video solution: 2 Upvotes 288 Avg. Video Duration 5 min

More • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Experiment on Reaction of Iron with Copper Sulphate Solution in Water A physical change occurs when there is no change in the composition of a substance and no change in the chemical nature of the substance. The interconversion of state occurs during physical change. SOLID ⇄ LIQUID ⇄ GAS A chemical change is a change that causes a change in the chemical properties of matter, resulting in the formation of a new substance. As an example, consider the burning of oil or fuel. Heat is evolved or taken in, the formation of bubbles, gas, and fumes, as well as a change in the colour of the reactants, can take place when they form a product. Reactants → Products A + B → C (Chemical reaction) Also Read: Table of Contents • Aim • Materials Required • Theory • Procedure...