SPM Chemistry Perak Trial Set 1

A patient is diagnosed of having cancer. Which isotope is used to treat the patient?

• Phosphorus-32

• Carbon-14

• Sodium-24

• Cobalt-60

Why carbon-12 is chosen as the standard atom to determine the relative atomic mass and relative molecular mass?

• Carbon has three isotopes

• Carbon is a non-metal element

• Carbon is solid at room temperature and can be handled easily

Which characteristic is correct about elements in Group 17 in the Periodic Table as going down the group?

• The intensity of colour decreases

• The tendency to accept an electron decreases

• The physical state changes from liquid to gas

• Force of attraction between nucleus and electron become stronger

Which of the following element forms brown coloured compound and functions as a catalyst in industry?

• Iron

• Carbon

• Sodium

• Bromine

Diagram 1 shows the ionisation equation for ammonia.

NH₃ + H₂O ⇌ NH₄⁺ + OH^-

Which of the following particle shows that ammonia is an alkali?

• NH₃

• H₂O

• NH₄⁺

• OH^-

Which salts is prepared in a laboratory by a titration method?

• Magnesium nitrate

• Lead(II) chloride

• Sodium sulphate

• Copper(II) nitrate

Sodium chloride is an ionic compound. Which of the following is correct about sodium chloride?

• Dissolves in organic solvent

• Has high boiling point

• Cannot conduct electricity

• Has high volatility

The following are the characteristics of substance needed to produce a new product in industry:

✅Function under the extremely low temperature

✅Transfer information with high speed

• Ceramic

• Superconductor

• Fibre optic

• Fibre glass

Diagram 2 shows the apparatus set-up for an experiment to electroplate an iron ring with silver. What are P, Q and R?

• P: Ring

  Q: Silver

  R: Silver nitrate

• P: Ring

  Q: Silver

  R: Iron (II) nitrate

• P: Silver

  Q: Ring

  R: Silver (II) nitrate

• P: Silver

  Q: Ring

  R: Iron (II) nitrate

Synthetic rubber is more resistant to abrasion than natural rubber. Its grease and oil resistance also makes it a popular choice for corrosive environment. A manufacturer needs to produce sealants which are very resistant against chemical solvents and oils.

Which is the most suitable synthetic rubber to produce sealants?

• Thiokol

• Neoprene

• Silicone rubber

• Styrene-butadiene rubber