Answer available
Class 9 · Chemistry · Water
Define solute, solvent and solution, and state what a saturated solution is.
2 marksEasyShort answer
ICSE question bank
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65 questions
- Answer available
Class 9 · Chemistry · Atomic Structure and Chemical Bonding
Why do noble gases not usually take part in chemical reactions?
3 marksMediumShort answer
- Answer available
Class 9 · Chemistry · The Language of Chemistry
What is a chemical formula? State what the formula H2SO4 tells you.
2 marksEasyShort answer
- Answer available
Class 9 · Chemistry · The Periodic Table
How many periods and groups are there in the modern periodic table, and what does the period number of an element tell you?
3 marksMediumShort answer
- Answer available
Class 9 · Chemistry · Chemical Changes and Reactions
Name four types of chemical reaction and give one equation for each.
3 marksMediumStructured
- Answer available
Class 9 · Chemistry · Water
The solubility of potassium nitrate at 30 °C is 45 g per 100 g of water. What mass of the salt will saturate 250 g of water at that temperature?
3 marksMediumNumerical
- Answer available
Class 9 · Chemistry · Study of Gas Laws
State three postulates of the kinetic molecular theory of gases.
3 marksMediumShort answer
- Answer available
Class 9 · Chemistry · Atomic Structure and Chemical Bonding
What is the octet rule, and which family of elements already obeys it?
3 marksMediumShort answer
- Answer available
Class 9 · Chemistry · Study of Gas Laws
A gas occupies 320 cm3 at 27 °C and 800 mm of mercury. Find its volume at S.T.P.
3 marksMediumNumerical
- Answer available
Class 9 · Chemistry · Study of Gas Laws
A gas occupies 200 cm3 at 27 °C and 760 mm of mercury. Find its volume at 0 °C and 380 mm of mercury.
4 marksHardNumerical
- Answer available
Class 9 · Chemistry · Study of Gas Laws
State Boyle's law and Charles' law.
2 marksEasyShort answer
- Answer available
Class 9 · Chemistry · Chemical Changes and Reactions
What is a catalyst? Give one example with the reaction it catalyses.
3 marksMediumShort answer
- Answer available
Class 9 · Chemistry · The Periodic Table
An element X has an atomic number of 16. Write its electronic configuration, its group and period, and the formula of its compound with hydrogen.
3 marksMediumNumerical
- Answer available
Class 9 · Chemistry · The Periodic Table
State two advantages of the modern periodic table over Mendeleev's table.
3 marksMediumShort answer
- Answer available
Class 9 · Chemistry · The Periodic Table
State three achievements and two defects of Mendeleev's periodic table.
3 marksMediumShort answer
- Answer available
Class 9 · Chemistry · Chemical Changes and Reactions
Distinguish between an exothermic and an endothermic reaction, with one example of each.
3 marksMediumShort answer
- Answer available
Class 9 · Chemistry · Atomic Structure and Chemical Bonding
Explain the formation of a molecule of sodium chloride, naming the type of bond formed.
3 marksMediumStructured
- Answer available
Class 9 · Chemistry · Study of the First Element: Hydrogen
What is the activity series, and how does it decide whether a metal will displace hydrogen from a dilute acid?
3 marksMediumShort answer
- Answer available
Class 9 · Chemistry · Water
Define solubility and state two factors that affect the solubility of a solid in water.
3 marksMediumShort answer
- Answer available
Class 9 · Chemistry · Atmospheric Pollution
What is photochemical smog and how is it formed?
3 marksMediumShort answer