Science Form 1 KSSM Mixtures & Compounds

What is a compound?

Apakah itu sebatian?

• A mixture of different substances
  (Campuran bahan yang berbeza)

• A pure substance made of 2 or more elements chemically combined
  (Bahan tulen yang terdiri daripada 2 atau lebih unsur bergabung secara kimia)

• A substancethat can be seperated by physical methods
  (Bahan yang boleh diasingkan secara kaedah fizikal)

• A material that has no fixed ratio
  (Bahan yang tiada nisbah tetap)

Which of the following is a compound?

(Mana antara berikut ialah sebatian?)

• Air
  (Udara)

• Salad

• Water, H₂O
  (Air)

• Sand + Salt
  (Pasir + Garam)

Which of the following is a mixture?
(Mana antara berikut ialah campuran?)

• Carbon dioxide (CO₂)
  (Karbon dioksida)

• Sodium chloride (NaCl)
  (Natrium klorida)

• Iron sulphide (FeS)
  (Ferum sulfida)

• Fruit salad
  (Rojak buah/Salad buah)

How are mixtures and compounds different?
(Bagaimana campuran dan sebatian berbeza?)

• Mixtures can be separated physically, compounds cannot
  (Campuran boleh diasingkan secara fizikal, sebatian tidak boleh)

• Compounds can be separated physically, mixtures cannot
  (Sebatian boleh diasingkan secara fizikal, campuran tidak boleh)

• Both can only be separated by chemical methods
  (Kedua-duanya hanya boleh diasingkan dengan kaedah kimia)

• Both are the same
  (Kedua-duanya sama)

Which statement about mixtures is correct?
(Pernyataan manakah tentang campuran yang betul?)

• Mixtures have no fixed ratio of substances
  (Campuran tiada nisbah tetap antara bahan)

• Mixtures are always solids

  (Campuran sentiasa pepejal)

• Mixtures can only be made in the laboratory
  (Campuran hanya boleh dibuat di makmal)

• Mixtures cannot be separated

  (Campuran tidak boleh diasingkan)

Which statement about compounds is correct?
(Pernyataan manakah tentang sebatian yang betul?)

• Compounds are formed by physical change

  (Sebatian terbentuk melalui perubahan fizikal)

• Compounds are made by chemical change
  (Sebatian terbentuk melalui perubahan kimia)

• Compounds have no fixed ratio
  (Sebatian tiada nisbah tetap)

• Compounds can be separated by filtration
  (Sebatian boleh diasingkan dengan penurasan)

Salt (NaCl) is an example of…
(Garam (NaCl) ialah contoh…)

• Mixture
  (Campuran)

• Compound

  (Sebatian)

• Element

  (Unsur)

• Solution
  (Larutan)

Why can mixtures be separated easily?
(Mengapa campuran boleh diasingkan dengan mudah?)

• Because they are made by chemical change

  (Kerana terbentuk melalui perubahan kimia)

• Because they are mixed physically
  (Kerana bercampur secara fizikal)

• Because they are always liquids

  (Kerana sentiasa dalam bentuk cecair)

• Because they contain only one substance

  (Kerana mengandungi hanya satu bahan)

When iron and sulphur are heated strongly, they form…
(Apabila besi dan sulfur dipanaskan dengan kuat, ia membentuk…)

• A mixture of iron and sulphur

  (Campuran besi dan sulfur)

• A compound called iron sulphide (FeS)

  (Sebatian dipanggil ferum sulfida)

• A solution of iron in sulphur
  (Larutan besi dalam sulfur)

• A salt that can be separated physically

  (Garam yang boleh diasingkan secara fizikal)