CBSE Class-10 Science: Questions 104 - 116 of 117
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Question number: 104
Question number: 105
Write in Short
Explain why the marble statues often get corroded slowly when kept in open for a long time?
Question number: 106
Question number: 107
Question number: 108
Question number: 109
Question number: 110
Question number: 111
Describe in Detail
Write a note on process of corrosion?
Corrosion is the process by which metals are eaten away layer by layer, by the action of air, moisture or chemicals on their surface.
Iron when exposed to moist air for a long time acquires a coating of a brown flaky substance called rust.
Silver articles become black after some… (85 more words) …
Question number: 112
Question number: 113
Question number: 114
Question number: 115
Write in Brief
In a first aid manual it was suggested that vinegar should be used to treat wasp sting and baking soda for bee stings.
(i) What does this information tell you about the chemical nature of the wasp stings
(ii) If there were no baking soda in the house, what other household substance could you use to treat bee stings?
Question number: 116
Write in Short
Sneha and Shivam want to prepare dilute H2SO4. Sneha added concentrated H2SO4 to water slowly with constant stirring& cooling whereas, Shivam added water to concentrated H2SO4. Name the student who was correct and why?