HARD
9th West Bengal Board
IMPORTANT
Earn 100

What is the difference between alkali and a base?

Important Questions on Atomic Structure; Physical and Chemical Properties of Matter

MEDIUM
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 4 - Atomic Structure; Physical and Chemical Properties of Matter>EXERCISE>Q 4
Give reason that dilute H2SO4 behaves as a stronger acid than concentrated H2SO4.
MEDIUM
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 4 - Atomic Structure; Physical and Chemical Properties of Matter>EXERCISE>Q 5
All alkalies are bases, but all bases are not alkalis. Explain.
MEDIUM
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 4 - Atomic Structure; Physical and Chemical Properties of Matter>EXERCISE>Q 6
Why blue copper sulphate becomes white on heating?
HARD
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 4 - Atomic Structure; Physical and Chemical Properties of Matter>EXERCISE>Q 7
Name a metal that reacts with both acid and alkali. Give equations.
HARD
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 4 - Atomic Structure; Physical and Chemical Properties of Matter>EXERCISE>Q 8
State with equation what happens when phosphorus is heated with concentrated nitric acid.
HARD
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 4 - Atomic Structure; Physical and Chemical Properties of Matter>EXERCISE>Q 9
How nitric acid is detected in the laboratory?
HARD
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 4 - Atomic Structure; Physical and Chemical Properties of Matter>EXERCISE>Q 10
State with the equation what happens when concentrated H2SO4 is added to the sugar?
MEDIUM
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 4 - Atomic Structure; Physical and Chemical Properties of Matter>EXERCISE>Q 11
State one use of KOH.