WorksheetsG7 IGCSE Annual Exam Revision Quiz
Total questions: 60
Worksheet time: 57mins
Based on the solubility curve, how many grams of sugar will dissolve in a 100 mL of water at 20°C?
100 g
150 g
200 g
250 g
At approximately what temperature does the solubility of sodium chloride, NaCl, match the solubility of potassium dichromate, K2Cr2O7?
60 ºC
30 ºC
50 ºC
83 ºC
Which substance is MOST soluble at 90 ºC?
Solid A
Solid B
Solid C
Which two were the same mixture of dyes?
1 and 5
2 and 6
3 and 4
4 and 6
The diagram shows the chromatogram for three colouring dyes and that for a brown marker. What dye(s) are contained in the marker's ink?
Purple and green
Purple and yellow
Green and yellow
blue and red
Calculate the Rf value - you will need a calculator
(Rf = distance moved by substance / distance moved by solvent front)
(a)
A man travels 25 kilometers in 15 minutes. A police officer stops him and writes a ticket for speeding. The posted speed limit is 80 kilometers per hour. Did the man exceed the posted speed limit?
No, he was traveling at a speed of 25 km/h
No, he was traveling at a speed less than 80 km/h
Yes, he was traveling at a speed of 100 km/h
Yes, traveling at a speed of 80 km/h is too fast for travel safety
A family drove several hours to visit a theme park. Their travel progress is charted. What was the average speed in kilometers per hour?
50
0.02
1,250
0.2
Which of these position vs. time graphs shows an object changing direction?
State the principle of moments.
When a system is in equilibrium, the sum of the total clockwise moment is equal to the sum of the total anti-clockwise moment about the same pivot.
When a system is in equilibrium, the sum of the total clockwise moment is greater the sum of the total anti-clockwise moment about the same pivot.
When a system is in equilibrium, the sum of the total clockwise moment is less than the sum of the total anti-clockwise moment about the same pivot.
When a system is in equilibrium, the sum of the total clockwise moment is equal to the sum of the total anti-clockwise moment about the different pivot.
Which of the following lever is balanced?
(Choose two correct answers.)
Which beams rotate clockwise?
P and Q only
P and R only
Q and R only
P, Q and R
In which diagram is the plate in equilibrium?
A
B
C
D
The diagrams show, to the same scale, the vertical sections of a set of circular vessels, each containing the same depth of water.
The water exerts the same pressure on the base of each vessel.
The water exerts the greatest pressure on the base of vessel S.
The water exerts the greatest pressure on the base of vessel P.
The water exerts the same force on the base of each vessel.
Two ways to increase pressure are:
Increase force and increase surface area
Decrease force and increase surface area
Decrease force and decrease surface area
Increase force and decrease surface area
Watch the tyres of tractor rolling. Rear tyres are broader because
It looks good.
Broader tyres lessen the muscular Force required.
Broader tyres lessen the pressure on ground.
Broader tyres lessen the friction on ground.
If a hairspray can is heated, what can be expected of the pressure of the gas inside the can?
The pressure will increase
The pressure will decrease
The pressure will remain constant
The pressure will equalize
A car tyre runs over a nail which makes a hole in it. The air in the tyre leaks out. Why does the air leave the tyre?
The pressure inside the tyre is greater than the pressure outside.
The pressure inside the tyre is less than the pressure outside.
The temperature inside the tyre is greater than the temperature outside.
The temperature inside the tyre is less than the temperature outside.
A driver of a car measures the pressure of the air in the tyres. He measures the pressure again
after a long journey. The pressure reading has increased.
Which row states what has happened to the speed of the air molecules and the temperature of
the air in the tyres?
A
B
C
D
A sealed gas cylinder is left outside on a hot, sunny day. What happens to the average speed of the molecules and to the pressure of the gas in the cylinder as the temperature rises?
A
B
C
D
What is DIFFUSION?
How did Rutherford's nuclear model of the atom differ from the previous plum pudding model?
Rutherford's model proposed a small, positively charged nucleus at the center of the atom, while the plum pudding model suggested a uniform distribution of positive charge.
Rutherford's model included electrons orbiting the nucleus, while the plum pudding model did not have a defined nucleus.
Rutherford's model suggested that atoms are mostly empty space, while the plum pudding model proposed a solid structure.
Rutherford's model introduced the concept of isotopes, which was not part of the plum pudding model.
How is a rainbow formed?
A) When raindrops absorb sunlight
B) When raindrops reflect sunlight
C) When raindrops disperse sunlight
D) When raindrops diffract sunlight
X is a surface that cannot produce clear images. What is X?
Rough surface
Ideal surface
Smooth surface
Smooth but curved surface
Which of the following demonstrates the law of reflection?
A
B
C
D
A plane mirror is inclined at 40o to the floor. An incident ray parallel to the floor strikes the mirror and a reflected ray is formed. What is the angle of reflection?
20o
40o
50o
80o
An object O is placed in front of a mirror. Which is a possible position of the image?
A
B
C
D
A man looked into a plane mirror and saw the clock as shown. What was the time then?
5 : 20
6 : 40
11 : 50
12 : 10
Light passes into a glass block. Which is the angle of refraction?
A
B
C
D
The diagram below shows a ray of monochromatic light incident on a boundary between air and glass. Which of the letters represent the path after it strikes the glass?
A
B
C
D
When barium hydroxide and ammonium chloride react, the temperature of the mixture decreases. What kind of reaction is this?
Endothermic
Decomposition
Exothermic
Indothermic
When calcium reacts with water, the temperature changes from 18°C to 39°C. Which statement is correct?
The solution at the end is acidic
The reaction is reversible
The reaction is exothermic
The reaction is endothermic
Some reactions would lead to impurity because it has two or more products during the reaction. Why do you think it is hard to produce pure product?
Select two correct responses.
because some different types of atoms of compounds are mixed up
because reactants are made up of two different compounds reacting together
atoms do not react each chemically
atoms are attracted to each other
Blue Diamond is a diamond which has some ..... element on it.
Boron
Nitrogen
Nickel
Silver
A pure substance has
Indefinite composition
Definite composition
No fixed melting points
No fixed boiling point
What does this illustrate
Elements
Compunds
Mixture of Elements and Compunds
Mixture of Compounds
How does light behave when hitting this shirt?
Yellow is absorbed; all other colors are reflected.
Yellow is reflected; all other colors are absorbed.
All colors are absorbed, but yellow is refracted.
Yellow is scattered and all other colors are absorbed.
How will this object appear when looking at it through a blue filter?
Blue
Green
Black
Orange
Magenta light is a mix of which two colours?
red
green
blue
The image shows an object that is __________.
transparent
translucent
opaque
Blue paper view under magenta light, only (a) light will be reflected so the paper looks (b) .
What colour will be seen on the screen if white light is shone through a combination of magenta and green filters?
Cyan
Green
Blue
No light
What colour will be seen on the screen if white light is shone through a combination of magenta and cyan filters?
Cyan
Green
Blue
No light
