Toggle Navigation
Games
Blog
Class PIN
Join for Free
Sign in
Toggle Navigation
Games
PIN
Join for Free
Blog
Pricing
Contact us
Help center
Sign in
Study
Semester 2
0
%
0
0
0
Back
Restart
Of all the mediums in which light travels the fastest
Air
Oops!
Okay!
What are the primary colours of light?
Red, Green and Blue
Oops!
Okay!
One evidence that supports the collision theory for the formation of the moon
Moon is less dense than earth, Samples of rock from the moon show that its surface was once molten
Oops!
Okay!
Draw 2 how 2 sound waves must meet in order to reinforce
constructive
Oops!
Okay!
Advantages of parallel circuit
Each component can work independently
Oops!
Okay!
What is refraction?And why it happens
bending of light, Change in direction due to change in speed when entering a different medium
Oops!
Okay!
What is the word equation for the reaction between zinc and sulphuric acid
Zinc sulphate + hydrogen
Oops!
Okay!
Draw 2 sound waves must meet in order to cancel out each other
destructive
Oops!
Okay!
Name of acid- Nitric Acid, what will be the name of salt formed by this.
Salt Nitrate
Oops!
Okay!
State the law of reflection
Angle of incidence = Angle of reflection
Oops!
Okay!
Red + Green
yellow
Oops!
Okay!
Can zinc displace the copper in copper sulphate?
Yes
Oops!
Okay!
Can silver displace the magnesium in magnesium sulphate?
No
Oops!
Okay!
Can iron displace aluminium from aluminium oxide? Explain your answer
No, Iron is least reactive that aluminium
Oops!
Okay!
Why would it be dangerous to prepare sodium chloride by reacting sodium with Hcl
Both are highly reactive
Oops!
Okay!
Why does a red rose appear red
All the colours are absorbed except red which reflects back to our eyes
Oops!
Okay!
Difference between resistor and a variable resistor
Variable- you can control the resistance
Oops!
Okay!
higher the temperature higher the rate of reaction. Justify
More temperature, more kinetic energy, more collision and more reaction
Oops!
Okay!
Which element are present in sulphuric acid? How many atoms of each atoms make up one particle of sulfuric acid?
7 atoms
Oops!
Okay!
The metal lithium is missing from the reactivity list, suggest where it should be placed
Most reactive
Oops!
Okay!
what is similar about the formula for Hcl and sodium chloride?
Chlorine
Oops!
Okay!
What is law of conservation of mass
Mass of the reactants will always be equal to the mass of the product
Oops!
Okay!
State ohms law
V = IR
Oops!
Okay!
Where will you connect ammeter and a voltmeter in circuit
Ammeter- Series, Voltmeter- Parallel
Oops!
Okay!
Platinum is a precious metal that is used for jewellery. Where in the list would you place platinum?
Least reactive
Oops!
Okay!
Your experience on this site will be improved by allowing cookies.
Allow cookies