# 1pilihan
What is the main characteristic of Group 1 elements in the periodic table?
They are non-metals
They are noble gases
They are highly reactive metals
They are transition metals
Grade 9 Final Revision
Ms. Nisa
Gaya Bebas
Menengah Atas 1
Sains
Grade 9 Final Revision
26
Menengah Atas 1
Sains
Grade 9 Final Revision
26
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# 2pilihan
Which element in Group 1 is the most reactive?
Lithium
Sodium
Potassium
Francium
# 3pilihan
How many valence electrons do Group 1 elements have?
One
Two
Three
Four
# 4pilihan
What is the electronic structure of sodium (Na)?
2, 8, 1
2, 8, 2
2, 8, 3
2, 8, 4
# 5pilihan
What characteristic is common among Group 7 elements?
They are all gases
They are all metals
They are all non-metals and highly reactive
They are inert
# 6pilihan
Which element is a halogen?
Oxygen
Nitrogen
Chlorine
Neon
# 7pilihan
How many valence electrons do Group 7 elements have?
Five
Six
Seven
Eight
# 8pilihan
What happens when a Group 1 metal reacts with a Group 7 element?
They form a salt
They form water
They form a gas
They form a metal alloy
# 9pilihan
Which of the following is a property of alkali metals?
High density
High melting point
Softness
Low reactivity
# 10pilihan
What is the electronic structure of chlorine (Cl)?
2, 8, 5
2, 8, 6
2, 8, 7
2, 8, 8
# 11pilihan
What is the rate of a chemical reaction?
The speed at which reactants are converted into products
The amount of reactants used
The color change in a reaction
The energy absorbed in a reaction
# 12pilihan
Which factor does NOT affect the rate of a chemical reaction?
Temperature
Concentration of reactants
Presence of a catalyst
Color of the reactants
# 13pilihan
How does increasing the temperature affect the rate of reaction?
It decreases the rate
It increases the rate
It has no effect
It stops the reaction
# 14pilihan
What role does a catalyst play in a chemical reaction?
It increases the amount of reactants
It provides energy to the reaction
It changes the products formed
It speeds up the reaction without being consumed
# 15pilihan
Which of the following increases the rate of reaction by increasing the surface area?
Breaking a solid into smaller pieces
Decreasing the temperature
Adding water to the reaction
Using a larger container
# 16pilihan
Why does increasing the concentration of reactants increase the rate of reaction?
It decreases the energy of the reactants
It increases the chance of collisions between reactant molecules
It changes the nature of the reactants
It reduces the volume of the reaction container
# 17pilihan
How does pressure affect the rate of reaction in gases?
Increasing pressure decreases the rate
Increasing pressure increases the rate
Pressure has no effect
Pressure changes the reactants
# 18pilihan
What is the effect of a catalyst on the activation energy of a reaction?
It increases the activation energy
It decreases the activation energy
It has no effect
It doubles the activation energy
# 19pilihan
Which factor can slow down the rate of a chemical reaction?
Increasing temperature
Increasing concentration
Decreasing surface area
Adding a catalyst
# 20pilihan
What is an example of a real-life catalyst?
Water in making ice
Salt in boiling water
Enzymes in digestion
Sugar in tea
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