GRAVITATION
What is the force of attraction between any two objects in the universe called?
Gravitational force
Loss of electrons is called ______.
Oxidation
How many groups are there in the Modern Periodic Table?
18
When light travels from air to glass, does it bend ______
Towards the normal
What is the valency of carbon?
4
Motion of an object under gravity alone is called ______.
Free Fall
What increases the rate of a reaction without being consumed?
Catalyst
1
Write the formula for refractive index.
n = sin i /sin r
What is the ability of carbon to form bonds with other carbon atoms called?
Catenation
What is the value of g at the centre of Earth?
Zero ( 0 )
One product is formed from two or more reactants. Name the reaction.
Combination Reaction
Which block contains the noble gases?
p-block
What is the angle of incidence at which the angle of refraction is 90° called?
Critical Angle
What type of hydrocarbon contains only single bonds?
Saturated Hydrocarbon
A stone is dropped from rest for 2 s. Find its velocity. g=10m/s2
20 m/s
What is the chemical formula of Rust
Fe₂O₃·xH₂O
Metalloids show properties of both ______ and _____
Metals and non-metals
State the two conditions for total internal reflection.
1. Light must travel from denser to rarer medium
2. The angle of incidence must be greater than the critical angle.
What is Isomerism?
Same Molecular Formula but different structure
If Earth’s radius increases but its mass remains the same, what happens to the value of g?
It decreases.
Balance: Mg + O₂ → MgO
2Mg + O₂ → 2MgO
Who proposed the modern periodic law?
Henry Moseley.
Name the three phenomena involved in rainbow formation.
1. Refraction
2. Dispersion
3. Total internal reflection.
Name the Following Structure
CH₃–C≡CH
Propyne