5.1 PSci Notes

Multiple Choice

Students observed a piece of iron change from shiny to rusty. What caused this change?

• a chemical reaction

• a heat reaction

• a cold reaction

• a physical reaction

Multiple Choice

Which is the best example of a new substance forming?

• lighting a match

• cutting a piece of paper

• popping a balloon

• hitting a nail with a hammer

Multiple Choice

Which is an example of a different substance being formed?

• glass breaking

• metal melting

• water freezing

• wood burning

Multiple Choice

Bending metal

• Physical Change

• Chemical Change

Multiple Choice

Boiling Water

• Physical Change

• Chemical Change

Multiple Choice

Dissolving Sugar

• Physical Change

• Chemical Change

Multiple Choice

A Candle Burning

• Physical Change

• Chemical Change

Multiple Choice

Nail Rusting

• Physical Change

• Chemical Change

Multiple Choice

A chemical change is a change in

• an item's properties such as size, shape, density

• an item that creates a new substance, releases light or heat

• an item's sound

• an item's look or state of matter

Multiple Choice

A physical change is a change

• in an item's properties like its shape, size or density.

• that creates a new substance or emits light or heat

• that creates a smell

• that cannot be undone

Multiple Choice

What is the left part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

• Reactants

• Yields

• Products

• Chemical queation

Multiple Choice

What is the right part of a chemical equation called?

2H₂ + O₂ ---> 2H₂

• Reactants

• Yields

• Products

• Chemical equation

Multiple Choice

What are the reactants of this equation?

• $$N_2+H_2$$

• $$2NH_3$$

Multiple Choice

What are the PRODUCTS of this equation?

• $$CH_4\ +\ 2O_2$$

• $$CO_2+\ 2H_2O$$

Multiple Choice

$$2Al^{ }\ \left(s\right)+SO_4^{ }\ \ \left(aq\right)\ \rightarrow\ Al_2\left(SO_4\right)_3\ \left(aq\right)$$  

Is SO₄ a solid, liquid, gas or aqueous?

• Solid

• Liquid

• Gas

• Aqueous

Multiple Choice

$$Zn\ \left(s\right)\ +\ HCl\ \left(aq\right)\ \rightarrow\ ZnCl_2\ \left(aq\right)\ +\ H_2\ \left(g\right)$$  

Is Zn a solid, liquid, gas or aqueous?

• Solid

• Liquid

• Gas

• Aqueous

Multiple Choice

$$CH_4\ \left(g\right)\ +\ Cl_2\ \left(g\right)\ \rightarrow\ CCl_4\ \left(g\right)\ +\ HCl\ \left(aq\right)$$  

Is CH₄ a solid, liquid, gas or aqueous?

• Solid

• Liquid

• Gas

• Aqueous