HARD
12th Uttar Pradesh Board
IMPORTANT
Earn 100

A first-order reaction takes 69.3 min for 50% completion. What is the time needed for 80% of the reaction to get completed?

Important Questions on Sample Paper 1

HARD
12th Uttar Pradesh Board
IMPORTANT
Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 11 - Sample Paper 1>Exercise>Q 20
Account for the following:
There are five -OH groups in glucose and glucose is a reducing sugar
HARD
12th Uttar Pradesh Board
IMPORTANT
Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 11 - Sample Paper 1>Exercise>Q 21
What happens when D-glucose is treated with the following reagents
Bromine water and HNO3
HARD
12th Uttar Pradesh Board
IMPORTANT
Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 11 - Sample Paper 1>Exercise>Q 22
Give reason for the following:
During the electrophilic substitution reaction of haloarenes, para substituted derivative is the major product.
HARD
12th Uttar Pradesh Board
IMPORTANT
Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 11 - Sample Paper 1>Exercise>Q 23

Give reason for the following:

The product formed during SN1 reaction is a racemic mixture.

MEDIUM
12th Uttar Pradesh Board
IMPORTANT
Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 11 - Sample Paper 1>Exercise>Q 24
Name the suitable alcohol and reagent, from which 2-Chloro-2-methyl propane can be prepared.
MEDIUM
12th Uttar Pradesh Board
IMPORTANT
Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 11 - Sample Paper 1>Exercise>Q 25
Out of the Chloromethane and Fluoromethane , which one is has higher dipole moment and why?
HARD
12th Uttar Pradesh Board
IMPORTANT
Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 11 - Sample Paper 1>Exercise>Q 26
The formula Co(NH3)5CO3Cl could represent a carbonate or a chloride. Write the structures and names of possible isomers.
HARD
12th Uttar Pradesh Board
IMPORTANT
Chemistry Crash Course (Based on Revised Syllabus-2023)>Chapter 11 - Sample Paper 1>Exercise>Q 27
Corrosion is an electrochemical phenomenon. The oxygen in moist air reacts as follows:
O2(g) + 2H2O(l) + 4e- → 4OH- (aq)
Write down the possible reactions for corrosion of zinc occurring at anode, cathode, and overall reaction to form a white layer of zinc hydroxide.