The following equation represents the reaction between calcium carbonate and hydrochloric acid.

CaCO₃ + 2HCL --> CaCl₂ + CO₂ + H₂O

Which products is most suitable to be chosen to determine the rate of reaction?

A student wants to produce a rubber strip that is harder and resistant to heat. He dip the natural rubber strip in a beaker containing methylbenzene and substance Q. What is substance Q?

Ionic equation for the reaction between zinc and copper(II) ions solution, Cu²⁺ is shown below.

Zn + Cu²⁺ --> Zn²⁺ + Cu

Based on the equation, which substance undergoes oxidation?

Diagram 5 shows the energy level diagram for the precipitation reaction of silver chloride. Which of the following is true about the reaction?

Two cleaning agents, soap and detergent are used to wash clothes in sea water and river water. Which of the following pair is correct about the results obtained?I

What is the nucleon number of atom shown?

Which of the following is true about the atoms of elements Y and Z?

Element Z is located in the same group as chlorine in the Periodic Table. Z is not the actual symbol of the element.

Which of the following statements are the chemical properties of element Z?

Diagram shows the electron arrangement of a carbon dioxide molecule. Which of the following is true?

Table shows the observation for the reactions between metal N with two different salt solutions. Which of the following is correct ascending order of metal N, calcium and lead in the electrochemical series?

What are the products of the reaction between ethanoic acid and sodium oxide?

I - Water

II - Hydrogen

III - Ethyl ethanoate

IV - Sodium ethanoate

Diagram shows inland lake known as dead sea. In dry season, solid X is formed. During raining season all the solid X disappear. What are the properties of solid X?

I - Can be purified using recrystallization

II - Can conduct electricity in molten state

III - Consists of chloride and sulphate compounds

IV - Low melting and boiling point

Which of the following is the most suitable catalyst and conditions required for production of ammonia in industry?D

The following equation represents the reaction between sodium thiosulphate and sulphuric acid.

Na₂S₂O₃ + H₄SO₄ --> Na₂SO₄ + H₂O + SO₂ + S

20cm³ distilled water is added to the mixture. What is the difference of adding distilled water to the mixture compared to without adding distilled water?

When but-1-ene is shaken with bromine water, the brown bromine water is decolourised. What is the product of this reaction?

Diagram shows the results of an experiment to investigate the effect of metals on the rusting of iron.

Based on the result above, arrange iron, X and Y in increasing order of electropositivity.

Diagram 10 shows the energy profile diagram for a reaction between P and Q.

What is the value of X?

What is the additive added in detergent to improve the function of detergent as cleaning agent in hard water?

The properties of the element will change when across the period from left to right in the periodic table of element?

Which of the following show the changes?

Magnesium has 12 protons in the nucleus of its atom. Draw the electron arrangement of the magnesium ion.

Diagram shows the apparatus set-up to determine the empirical formula for an oxide of copper. Gas Z is used to reduce the oxide of copper. What is gas Z?

Which chemical formula is correctly named?

Formula kimia yang manakah dinamakan dengan betul ?

What is the empirical formula for the compound?

Apakah formula empirik bagi sebatian itu?

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