Solutions

Solutions

Assessment

Interactive Video

Science

7th Grade

Hard

Created by

John Granger

Used 3+ times

FREE Resource

5 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens when a more reactive element meets a less reactive one in a compound?

The less reactive element becomes more reactive.

Nothing happens.

They both become less reactive.

The more reactive element displaces the less reactive one.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it useful to displace less reactive metals like silver?

Because they are easy to find.

Because they are not useful.

Because they are precious and valuable.

Because they are more reactive.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens when bromine is added to sodium iodide solution?

The solution remains colorless.

The solution turns green.

The solution turns dark brown.

The solution turns blue.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the thermite reaction, what does aluminum do to iron oxide?

It displaces the iron from its oxide.

It turns into iron.

It does nothing.

It combines with it.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is the thermite reaction important for railway tracks?

It helps in painting the tracks.

It is used to fuse and repair tracks.

It is used to clean the tracks.

It makes the tracks shiny.

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