Chemistry AS Number 1

Question 1

What is the oxidation state of Mn in KMnO4

Accepted Answer

+7

Question 2

What is the oxidation state of Nitrogen in NO2

Accepted Answer

+4

Question 3

Which of these is the constant that describes the number of atoms in one mole?

Accepted Answer

Avogadro's

Question 4

Experimental yield divided by theoretical yield x 100 will give us ...

Accepted Answer

percentage yield

Question 5

In reduction which of the following happens?

Accepted Answer

ox number decreases

Question 6

Which of these elements in Period 2 has the highest 1st ionisation enthalpy?

Accepted Answer

Ne

Question 7

What is the core charge of an Oxygen atom?

Accepted Answer

+6

Question 8

What is the charge on a copper ion?

Accepted Answer

2+

Question 9

Which describes the shape of SF6

Accepted Answer

Octahedral

Question 10

What symbol is assigned to Planck's constant?

Accepted Answer

h

Question 11

A lone pair on a molecule will reduce the bond angle by .....

Accepted Answer

2.5°

Question 12

Which of these is in Group 6 of the Periodic Table?

Accepted Answer

S

Question 13

Carbon Dioxide's shape is described as ...

Accepted Answer

Linear

Question 14

The theory of proton transfer by acids and bases is known as the .... theory.

Accepted Answer

Bronsted-Lowry

Question 15

Which is the most abundant element in the human body by mass?

Accepted Answer

Oxygen

Questions 15