Chemistry mark schemes paper 1 questions and answers 100- accuracy.

Chemistry mark schemes paper 1 questions
and answers 100% accuracy
why did Mendeleev's table come to be so widely accepted? - Correct Answer
Mendeleev had predicted properties of missing elements
elements were discovered (that filled the spaces / gaps)
properties (of these elements) matched Mendeleev's predictions

QUIZ: what is atomic weight known as know? - Correct Answer relative atomic
mass

QUIZ: what happens when sodium reacts with chlorine - Correct Answer • flame
• (white) solid forms
• color of gas / chlorine disappears / fades

QUIZ: how do you spell the titration equipment? - Correct Answer burette

QUIZ: Benefits of Nanoparticles over fine particles? - Correct Answer • less can be
used (for the same effect)
• greater surface area (to volume ratio)

QUIZ: limitations of a diagram? - Correct Answer does not show the shape
or
only two-dimensional

QUIZ: control variables for testing the voltage of different electrodes? - Correct
Answer any two from:
• temperature (of solution)
• concentration of electrolyte / solution
• compound / ions in electrolyte / solution

QUIZ: why would a train running on a hydrogen fuel cell be a steam train? - Correct
Answer (in a fuel cell) hydrogen is oxidized (to produce water)
water is produced / released as gas / vapor / steam

QUIZ: what does rhyolite do - Correct Answer lowers an elements melting point

QUIZ: 2 reasons why bitumen is not used as a fuel (or any long chain hydrocarbon) -
Correct Answer too viscous
not flammable enough