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Plants absorb energy from sunlight during photosynthesis. How is photosynthesis classified?

1. ANeutralisation
2. BExothermic
3. CEndothermic
4. DNuclear

In a chemical equation, what are the reactants?

1. AThe starting substances, written to the left of the arrow
2. BThe numbers written in front of each formula
3. CThe catalysts written above the arrow
4. DThe new substances formed, written to the right of the arrow

What is an empirical formula?

1. AThe simplest whole-number ratio of atoms in a compound
2. BThe actual number of each atom in one molecule
3. CThe mass of one mole of a compound
4. DA drawing of how the atoms are bonded

How many oxygen atoms are in one formula unit of calcium nitrate, Ca(NO₃)₂?

1. A2
2. B5
3. C6
4. D3

Pernyataan mana tentang unsur-unsur dalam golongan yang sama yang benar?

1. AMereka memiliki jumlah elektron valensi yang sama dan sifat kimia yang serupa
2. BMereka selalu semuanya berwujud gas pada suhu kamar
3. CMereka memiliki massa atom yang sama dan jumlah proton yang sama
4. DMereka memiliki jumlah kulit elektron yang sama tetapi sifat yang berbeda

Water has a high specific heat capacity. How does this help the human body?

1. AIt makes the blood more acidic
2. BIt makes water a poor solvent for salts
3. CIt allows oxygen to dissolve in water more easily
4. DIt helps keep body temperature stable

A solution has a hydroxide ion concentration of 1 × 10⁻³ mol/L. What is its pH at 25 °C?

1. A14
2. B7
3. C11
4. D3

Manakah berikut ini yang merupakan asam lemah?

1. AAsam sulfat
2. BAsam klorida
3. CAsam asetat (dalam cuka)
4. DAsam nitrat