MEDIUM
10th Uttar Pradesh Board
IMPORTANT
Earn 100

A lot of waste is generated in neighbourhood. However, almost all of it is biodegradable. What impact will it have on the environment or human health? 

Important Questions on Sample Paper 1

HARD
10th Uttar Pradesh Board
IMPORTANT
Science Crash Course (Based on Revised Syllabus-2023)>Chapter 14 - Sample Paper 1>Exercise>Q 29

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Identify the type of reaction mentioned above in (i) and (ii). Give one example for each type in the form of a balanced chemical equation.

MEDIUM
10th Uttar Pradesh Board
IMPORTANT
Science Crash Course (Based on Revised Syllabus-2023)>Chapter 14 - Sample Paper 1>Exercise>Q 30

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a) Identify the gases that evolved at the cathode in the above experimental setup.

b) Name the process that occurs. Why it is called so?

c) Illustrate the reaction of the process with the help of a chemical equation.

MEDIUM
10th Uttar Pradesh Board
IMPORTANT
Science Crash Course (Based on Revised Syllabus-2023)>Chapter 14 - Sample Paper 1>Exercise>Q 31
The leaves of a plant were covered with aluminium foil, how would it affect the physiology of the plant? 
MEDIUM
10th Uttar Pradesh Board
IMPORTANT
Science Crash Course (Based on Revised Syllabus-2023)>Chapter 14 - Sample Paper 1>Exercise>Q 32
How is lymph an important fluid involved in transportation? If lymphatic vessels get blocked, how would it affect the human body? Elaborate.
HARD
10th Uttar Pradesh Board
IMPORTANT
Science Crash Course (Based on Revised Syllabus-2023)>Chapter 14 - Sample Paper 1>Exercise>Q 34
A lens of focal length 5 cm is being used by Debashree in the laboratory as a magnifying glass. Her least distance of distinct vision is 25 cm.
(i) What is the magnification obtained by using the glass?
(ii) She keeps a book at a distance 10 cm from her eyes and tries to read. She is unable to read. What is the reason for this?
MEDIUM
10th Uttar Pradesh Board
IMPORTANT
Science Crash Course (Based on Revised Syllabus-2023)>Chapter 14 - Sample Paper 1>Exercise>Q 35
Ravi kept a book at a distance of 10 cm from the eyes of his friend Hari. Hari is not able to read anything written in the book. Give reasons for this.
MEDIUM
10th Uttar Pradesh Board
IMPORTANT
Science Crash Course (Based on Revised Syllabus-2023)>Chapter 14 - Sample Paper 1>Exercise>Q 38
Why is damage to the ozone layer a cause for concern? What are its causes and what steps are being taken to limit this damage? 
MEDIUM
10th Uttar Pradesh Board
IMPORTANT
Science Crash Course (Based on Revised Syllabus-2023)>Chapter 14 - Sample Paper 1>Exercise>Q 39

Shristi heated Ethanol with a compound A in presence of a few drops of concentrated sulphuric acid and observed a sweet-smelling compound B is formed. When B is treated with sodium hydroxide it gives back Ethanol and a compound C.

a) Identify A and C

b) Give one use for each of compounds A and B.

c) Write the chemical reactions involved and name the reactions.