OCR_A Level Chemistry B_H433/01 Question Paper Oct 2021 | Fundamentals in Chemistry

Tuesday 5 October 2021 – Afternoon

A Level Chemistry B (Salters)

H433/01 Fundamentals of Chemistry

 Time allowed: 2 hours 15 minutes

2

© OCR 2021

SECTION A

You should spend a maximum of 40 minutes on this section.

Write your answer to each question in the box provided.

Answer all the questions.

1 Chlorine-35 is an isotope of chlorine.

What is correct about an atom of chlorine-35?

A It has 35 electrons.

B It has 35 neutrons.

C It has 35 protons.

D It has 35 protons plus neutrons.

Your answer [1]

2 What is meant by ‘heating to constant mass’?

A Heating a sample for a long time.

B Heating a sample, then weighing, then heating and weighing again several times.

C Weighing a sample several times after heating it.

D Weighing a sample several times before heating it.

Your answer [1]

3 Which of these provides evidence that electrons are arranged in shells within atoms?

A atomic spectra

B electrolysis

C the discovery of the neutron

D the Geiger-Marsden experiment