Science Paper 6

Question 1

What charge does an electron have

Answer 1

A negative charge

Question 2

What is direction of an electron in a circuit

Answer 2

Electrons in wires go in a straight direction towards the positive terminal

Question 3

What type of product is good for indigestion?

Answer 3

Alkalic products

Question 4

How does an electron move in a metal?

Answer 4

They move in a random direction

Question 5

Whats the process of mixing an acid and an alkali together?

Answer 5

Neutralization

Question 6

How can we test a solution to see if its neutral or not

Answer 6

We can use an universal indicator and if the universal indicator turns green then its a neutral solution

Question 7

When magnesium is added to hydrochloric acid, a gas is given off.
i)Explain if its a chemical or physical reaction
ii)What gas is formed in this experiment and how can we test it?

Answer 7

Ans. i)It’s a chemical change since a new substance was formed

Ans. ii) Hydrogen gas was given off and we could use a lighted splint and put it in the gas and if it makes a pop sound its hydrogen gas

Question 8

how to neutralize an acid?

Answer 8

To neutralize an acid you can use a burette and fill it up with acid and put it over a beaker filled with alkaline using a clamp stand. Slowly add the acid until the color of the alkaline changes and turns into a neutral substance.