{"id":6887,"date":"2024-01-13T13:26:07","date_gmt":"2024-01-13T13:26:07","guid":{"rendered":"https:\/\/theexampillar.com\/ncert\/?p=6887"},"modified":"2024-01-13T13:33:24","modified_gmt":"2024-01-13T13:33:24","slug":"ncert-solutions-class-10-science-chapter-3-metals-and-non-metals","status":"publish","type":"post","link":"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-10-science-chapter-3-metals-and-non-metals\/","title":{"rendered":"NCERT Solutions Class 10 (Science) Chapter 3 (Metals and Non-Metals)"},"content":{"rendered":"

NCERT Solutions Class 10 Science\u00a0<\/span><\/h2>\n

The NCERT Solutions in English Language for Class 10 Science Chapter – 3 (Metals and Non-Metals) <\/strong>has been provided here to help the students in solving the questions from this exercise.\u00a0<\/span><\/p>\n

Chapter – 3 (Metals and Non-Metals)\u00a0<\/span><\/h2>\n

Questions<\/strong><\/span><\/p>\n

1. <\/span>Give example of a metal which<\/span><\/strong><\/span>
\n(a) is a liquid at room temperature<\/span>
\n(b) can be easily cut with a knife<\/span>
\n(c) is the best conductor of heat<\/span>
\n(d) is the poorest conductor of heat.<\/span>
\nAnswer –\u00a0<\/strong><\/span>
\n(a) is a liquid at room temperature – Mercury<\/strong>
\n(b) can be easily cut with a knife – Sodium<\/strong>
\n(c) is the best conductor of heat – Silver<\/strong>
\n(d) is the poorest conductor of heat. – <\/span>Lead.<\/span><\/strong><\/span><\/p>\n

2. <\/span>Explain the meaning of malleable and ductile.<\/span><\/strong><\/span>
\nAnswer –
\n<\/strong><\/span>Malleable :<\/strong> Substances that can be beaten into thin sheets are called malleable. For example, most of the metals are malleable.
\nDuctile :<\/strong> Substances that can be drawn into thin wires are called ductile. For example, most of the metals are ductile.
\n<\/strong><\/span><\/span><\/p>\n

Questions<\/strong><\/span><\/p>\n

1. <\/span>Why is sodium kept immersed in kerosene oil ?\u00a0<\/span><\/strong><\/span>
\nAnswer – <\/strong>Sodium and potassium are very reactive metals and and combine explosively with air as well as water. Hence, they catch fire if kept in open. Therefore, to prevent accidental fires and accidents, sodium is stored immersed in kerosene oil.<\/span><\/p>\n

2. <\/span>Write the equations for the reactions of<\/span><\/strong><\/span>
\n(a) iron with steam<\/span>
\n(b) calcium with water<\/span>
\n(c) potassium with water.<\/span>
\nAnswer:<\/strong><\/span>
\n(a) 3Fe(s) + 4H2<\/sub>O (steam)\u00a0 \u00a0\u2192 Fe3<\/sub>O4<\/sub>(s) + 4H2<\/sub>(g)<\/span>
\n(b) Ca(s) + 2H2<\/sub>O(aq) \u2014\u2014\u2014\u2013> Ca(OH)2<\/sub>(s) +H2<\/sub>(g)<\/span>
\n(c) 2K(s) + 2H2<\/sub>O(aq) \u2014\u2014\u2014\u2013> 2KOH(aq) + H2<\/sub>(g)<\/span><\/p>\n

3. <\/span>Samples of four metals A, B, C and D were taken and were added to the following solutions one by one. The results obtained have been tabulated as follows :
\n<\/span><\/strong><\/span><\/p>\n\n\n\n\n\n\n\n
Metal<\/strong><\/span><\/td>\nIron(II) sulphate<\/strong><\/span><\/td>\nCopper(II) sulphate<\/strong><\/span><\/td>\nZinc sulphate<\/strong><\/span><\/td>\nSilver nitrate<\/strong><\/span><\/td>\n<\/tr>\n
A<\/strong><\/span><\/td>\nNo reaction<\/span><\/td>\nDisplacement<\/span><\/td>\n–<\/span><\/td>\n–<\/span><\/td>\n<\/tr>\n
B<\/strong><\/span><\/td>\nDisplacement<\/span><\/td>\n–<\/span><\/td>\nNo reaction<\/span><\/td>\n–<\/span><\/td>\n<\/tr>\n
C<\/strong><\/span><\/td>\nNo reaction<\/span><\/td>\nNo reaction<\/span><\/td>\nNo reaction<\/span><\/td>\nDisplacement<\/span><\/td>\n<\/tr>\n
D<\/strong><\/span><\/td>\nNo reaction<\/span><\/td>\nNo reaction<\/span><\/td>\nNo reaction<\/span><\/td>\nNo reaction<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Use the table given above to answer the following questions :<\/span><\/strong><\/span>
\n(a) Which is the most reactive metal ?<\/span>
\n(b) What would you observe when B is added to solution of copper(II) sulphate ?<\/span>
\n(c) Arrange the metals A, B, C and D in order of increasing reactivity. (CBSE 2011)<\/span>
\nAnswer – <\/strong><\/span>Based on the activity series, the relative position of the metals in which involved in solutions is : Zn > Fe > Cu > Ag. On the basis of the results given in the table .<\/span><\/span><\/p>\n