MEDIUM
Earn 100

How do the aquatic animals survive in the water even when the rivers are covered with ice on the surafce, during the winter season?

Important Questions on Water

EASY
Science>Chemistry>Water>Physical and Chemical Properties of Water
What happens when steam is passed over red-hot iron. Write only chemical equation.
MEDIUM
Science>Chemistry>Water>Physical and Chemical Properties of Water
Explain how painting of an iron gate prevents it from rusting.
HARD
Science>Chemistry>Water>Physical and Chemical Properties of Water
Why is rusting of iron considered a chemical change?
MEDIUM
Science>Chemistry>Water>Physical and Chemical Properties of Water
Give reason of Water pipes burst in severe winter.
MEDIUM
Science>Chemistry>Water>Physical and Chemical Properties of Water

Give reasons-

Why copper is used to make hot water tanks and not steel (an alloy of iron)?

HARD
Science>Chemistry>Water>Physical and Chemical Properties of Water
What is the action of water on magnesium? Write equations of the chemical reactions involved.
HARD
Science>Chemistry>Water>Physical and Chemical Properties of Water
Describe tinning of iron sheets.
EASY
Science>Chemistry>Water>Physical and Chemical Properties of Water
Which of the following is/are stored in kerosene?
HARD
Science>Chemistry>Water>Physical and Chemical Properties of Water
Explain why rusting of iron objects is faster in coastal areas than in deserts.
MEDIUM
Science>Chemistry>Water>Physical and Chemical Properties of Water
Give a reason for the following:
Sodium and potassium are stored in kerosene.
MEDIUM
Science>Chemistry>Water>Physical and Chemical Properties of Water
Sodium metal reacts vigorously with water.
Name the gas evolved when sodium reacts with water.
MEDIUM
Science>Chemistry>Water>Physical and Chemical Properties of Water
Give reasons: Sodium, potassium and lithium are stored under oil.
MEDIUM
Science>Chemistry>Water>Physical and Chemical Properties of Water
Why does aluminium not react with water under ordinary conditions?
MEDIUM
Science>Chemistry>Water>Physical and Chemical Properties of Water
Give the chemical name of the rust.
EASY
Science>Chemistry>Water>Physical and Chemical Properties of Water
Why is sodium and potassium stored in kerosene?
HARD
Science>Chemistry>Water>Physical and Chemical Properties of Water
Sodium metal reacts vigorously with water.
State whether the Solution formed by the reaction of sodium with water is acidic or basic.
EASY
Science>Chemistry>Water>Physical and Chemical Properties of Water
Give reason of Icebergs float on ocean water.
MEDIUM
Science>Chemistry>Water>Physical and Chemical Properties of Water
Why are iron objects usually painted?
EASY
Science>Chemistry>Water>Physical and Chemical Properties of Water
Which of the following reacts vigorously with water and slowly with water?
MEDIUM
Science>Chemistry>Water>Physical and Chemical Properties of Water
Name two metals which react violently with cold water. Write any three observations you would make when such a metal is dropped into water. How would you identify the gas evolved, if any, during the reaction?