{"id":7801,"date":"2023-12-13T12:17:34","date_gmt":"2023-12-13T06:47:34","guid":{"rendered":"https:\/\/onlitutor.com\/courses\/lab-manual-science-class-7-cbse\/lesson\/viva-questions-2\/"},"modified":"2023-12-13T12:17:34","modified_gmt":"2023-12-13T06:47:34","slug":"viva-questions-2","status":"publish","type":"lesson","link":"https:\/\/onlitutor.com\/courses\/lab-manual-science-class-7-cbse\/lesson\/viva-questions-2\/","title":{"rendered":"Viva Questions"},"content":{"rendered":"<p><strong>What are acids?<\/strong><\/p>\n<p>Ans: The substances that taste sour and turn blue litmus paper red are called acids.<\/p>\n<p><strong>What are bases?<\/strong><\/p>\n<p>Ans: The substances which are bitter in taste, feel soapy and turn red litmus paper blue are called bases.<\/p>\n<p><strong>What are neutral solutions?<\/strong><\/p>\n<p>Ans: The solutions which do not change the colour of either red or blue litmus paper are known as neutral solutions.<\/p>\n<p><strong>What are indicators?<\/strong><\/p>\n<p>Ans: The substances used to test whether a substance is acidic or basic are known as indicators.<\/p>\n<p><strong>What is breathing?<\/strong><\/p>\n<p>Ans: Breathing is a process in which air rich in oxygen is taken in and air rich in carbon dioxide is given out.<\/p>\n<p><strong>What is respiration?<\/strong><\/p>\n<p>Ans: The process of breakdown of food inside the cell with the release of energy is called respiration.<\/p>\n<p><strong>What is the difference between breathing and respiration?<\/strong><\/p>\n<p>Ans: Breathing is just a mechanical process of inhaling and exhaling air, while respiration is a complex process which involves breakdown (oxidation) of food in the cell with simultaneous release of energy. Carbon dioxide and water are also produced in this process.<\/p>\n<p><strong>What is inhalation?<\/strong><\/p>\n<p>Ans: The intake of air rich in oxygen is called inhalation.<\/p>\n<p><strong>What is light?<\/strong><\/p>\n<p>Ans: Light is a form of energy that is always in motion. It is light that enables us to see an object.<\/p>\n<p><strong>What are luminous objects?<\/strong><\/p>\n<p>Ans: Objects that have their own light, i.e., objects that emit light, are called luminous objects, e.g., Sun, stars, etc.<\/p>\n<p><strong>What is a beam of light?<\/strong><\/p>\n<p>Ans: A number of rays of light travelling together are called a beam of light.<\/p>\n<p><strong>What is a ray of light?<\/strong><\/p>\n<p>Ans: A straight line drawn from the source of light, which represents the straight path of light, is called a ray of light.<\/p>\n<p><strong>What is reflection of light?<\/strong><\/p>\n<p>Ans: The phenomenon of bouncing or bending of light by a surface back to the same medium, when light falls on it, is called reflection of light.<\/p>\n<p><strong>What are the seven constituent colours of sunlight?<\/strong><\/p>\n<p>Ans: These are red, orange, yellow, green, blue, indigo and violet.<\/p>\n<p><strong>What is a prism?<\/strong><\/p>\n<p>Ans: A prism is a piece of any transparent material (e.g., glass) which is bounded by two triangular and three rectangular surfaces.<\/p>\n","protected":false},"comment_status":"open","ping_status":"closed","template":"","_links":{"self":[{"href":"https:\/\/onlitutor.com\/index.php\/wp-json\/wp\/v2\/lesson\/7801"}],"collection":[{"href":"https:\/\/onlitutor.com\/index.php\/wp-json\/wp\/v2\/lesson"}],"about":[{"href":"https:\/\/onlitutor.com\/index.php\/wp-json\/wp\/v2\/types\/lesson"}],"replies":[{"embeddable":true,"href":"https:\/\/onlitutor.com\/index.php\/wp-json\/wp\/v2\/comments?post=7801"}],"wp:attachment":[{"href":"https:\/\/onlitutor.com\/index.php\/wp-json\/wp\/v2\/media?parent=7801"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}