Day 15: CBSE Class 10 Science

5 questions. Try each one first, then open its answer.

Question 1
The Human Eye and the Colourful World. Asked 3 times: 2023*, 2024*, 2025 (* = numbers or wording changed that year)
25 (B) $Name the type of lenses required by the persons for the correction of their defect of vision called presbyopia. Write the structure of the lenses commonly used for the correction of this defect giving reason for such designs.$
Question 2
The Human Eye and the Colourful World. Asked 3 times: 2023*, 2024*, 2025 (* = numbers or wording changed that year)
33 $(a) Draw a diagram to show the dispersion of white light by a glass prism. (b) What is spectrum ? Give reason for its formation.$
Question 3
Acids, Bases and Salts. Asked 2 times: 2023*, 2026 (* = numbers or wording changed that year)
25 $How is tooth decay related to pH ? How can it be prevented ?$
Question 4
Acids, Bases and Salts. Asked 2 times: 2023*, 2026 (* = numbers or wording changed that year)
17 $Tomato is a natural source of which acid ?$
Tap an option to check your answer.
Question 5
Acids, Bases and Salts. Asked 2 times: 2023*, 2026 (* = numbers or wording changed that year)
18 $Which one of the following can be used as an acid-base indicator by a visually impaired (blind) student ?$
Tap an option to check your answer.

Question 1