tindak balas cepat dan tindak balas perlahan

Which of the following processes has the fast reaction?

Antara proses berikut, yang manakah merupakan tindak balas cepat?

• Rusting of iron nail

  Pengaratan paku besi

• Photosynthesis in plants

  Fotosintesis dalam tumbuhan

• Burning of charcoal

  Pembakaran arang

• Fermentation of alcohol

  Penapaian alkohol

Diagram 17 below shows a graph of the volume of hydrogen against time for the reaction between zinc and dilute hydrochloric acid.

Based on the graph above, calculate the overall average response rate for this reaction.

Rajah 17 menunjukkan graf isipadu hidrogen melawan masa bagi tindak balas antara zink dengan asid hidroklorid cair.

Berdasarkan graf di atas, hitungkan kadar tindak balas purata keseluruhan bagi tindak balas ini.

Diagram 15 shows the reaction of metal in the air.

Which of the following is correct about the reaction?

Rajah 15 menunjukkan tindak balas logam dalam udara.

Antara yang berikut, yang manakah benar mengenai tindak balas ini?

• The reactant is more than the product.

  Bahan tindak balas lebih banyak daripada hasil tindak balas.

• The product is more than the reactant.

  Hasil tindak balas lebih daripada bahan tindak balas.

• Slow reaction.

  Tindak balas perlahan.

• Fast reaction.

  Tindak balas cepat.

Diagram 19 shows a graph for two types of reactions in daily life.

Which of the following represents Reaction J and Reaction K?

Rajah 19 menunjukkan graf bagi dua jenis tindak balas dalam kehidupan harian.

Antara berikut, yang manakah mewakili Tindak balas J dan Tindak balas K?

• Reaction J: Burning matches

  Tindak balas J: Pembakaran mancis

  Reaction K: Rusting of nails

  Tindak balas K: Pengaratan paku

• Reaction J: Rusting of nails

  Tindak balas J: Pengaratan paku

  Reaction K: Burning matches

  Tindak balas K: Pembakaran mancis

• Reaction J: Photosynthesis

  Tindak balas J: Fotosintesis

  Reaction K: Burning matches

  Tindak balas K: Pembakaran mancis

• Reaction J: Rusting of nails

  Tindak balas J: Pengaratan paku

  Reaction K: Photosynthesis

  Tindak balas K: Fotosintesis

A student conducted a laboratory experiment to investigate the rate of reaction of hydrochloric acid with granulated zinc.

Table 3 shows the results of the experiment.

What is the average rate of reaction for this experiment?

Seorang pelajar menjalankan satu eksperimen makmal untuk menyiasat kadar tindak balas bagi asid hidroklorik cair dengan ketulan zink.

Jadual 3 menunjukkan keputusan eksperimen tersebut.

Berapakah kadar tindak balas purata bagi eksperimen ini?

A student conducted two laboratory experiments to investigate the rate of reaction of sulphuric acid with calcium carbonate to collect 50 cm3 carbon dioxide gas.

Table 4 shows the results of the experiment.

Which of the following statements is true?

Seorang pelajar menjalankan dua eksperimen makmal untuk menyiasat kadar tindak balas bagi asid sulfurik cair dengan kalsium karbonat bagi mengumpulkan 50 cm3 gas karbon dioksida.

Jadual 4 menunjukkan keputusan eksperimen tersebut.

Antara pernyataan berikut, yang manakah benar?

• The rate of reaction in Experiment II is higher than in Experiment I

  Kadar tindak balas Eksperimen II lebih tinggi berbanding Eksperimen I

• The bigger the size of calcium carbonate, the bigger the exposed surface area

  Semakin besar saiz kalsium karbonat, semakin bertambah luas permukaan terdedah

• The smaller the surface area of the reactant exposed, the higher the rate of reaction

  Semakin berkurang luas permukaan bahan tindak balas terdedah, semakin bertambah kadar tindak balas

• The gradient of the volume of gas against time graph of Experiment I is greater than Experiment II

  Kecerunan graf isipadu gas melawan masa Eksperimen I lebih besar berbanding Eksperimen II

Table 2 shows the total volume of hydrogen gas accumulated when zinc reacts with hydrochloric acid.

Calculate the rate of reaction for the first minute.

Jadual 2 menunjukkan jumlah isi padu gas hidrogen yang terkumpul apabila zink bertindak balas dengan asid hidroklorik.

Kira kadar tindak balas pada minit yang pertama.

Which of the following changes is a fast reaction?

Antara perubahan berikut, yang manakah adalah tindak balas cepat?

• Decay

  Pereputan

• Rusting

  Pengaratan

• Photosynthesis

  Fotosintesis

• Burning

  Pembakaran

The figure shows a graph of the volume of hydrogen gas against time in the reaction between a lump of zinc and a solution of dilute hydrochloric acid.

What was the average response rate in the first 60s?

Rajah menunjukkan graf isipadu gas hidrogen melawan masa dalam tindak balas antara ketulan zink dan larutan asid hidroklorik cair.

Berapakah kadar tindak balas purata dalam 60s pertama?

Rajah menunjukkan tindak balas logam di dalam udara.

Antara berikut, yang manakah benar mengenai tindak balas ini?

• Bahan tindak balas lebih banyak daripada hasil tindak balas selepas tindak balas.

• Hasil tindak balas lebih daripada bahan tindak balas sebelum tindak balas.

• Tindak balas perlahan.

• Tindak balas cepat.