Recent questions without an upvoted answer

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1 answer

Carbon (IV) sublimes at -78ºC. It is called dry ice

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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State two situations where redox reactions are applied in industry

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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A stone is tied to a string and whirled in a horizontal circle at a constant speed. In which direction is the stone being accelerated at each point of its path?

asked Aug 5, 2021 in Physics Form 4 by anony mous

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1 answer

Observe the equation below

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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State two similarities between rusting and combustion

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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Moist iron wool was inverted over water. The set up was left to stand for 2 days

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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The diagram below shows two identical iron rods, one is placed on a wooden block and the other on a metal block. The ends of the rods are heated as shown.

asked Aug 5, 2021 in Physics Form 1 by anony mous

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The table below shows some properties and electronic arrangements of common ions of elements represented by letters P to X. Study the information in the table and answer the questions that follow

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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A force of 3500N acts on a stationary body of mass 20kg for 0.02 seconds. Calculate the velocity attained by the body

asked Aug 5, 2021 in Physics Form 3 by anony mous

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In an experiment, a test-tube full of chlorine water was inverted in chlorine water as shown in the diagram below and the set up left in sunlight for one day.

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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The curve below represents the variation of temperature with time when pure and impure samples of a solid were heated separately.

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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Samples of urine from three participants F, G and H at an international sports meeting were spotted onto a chromatography paper alongside two from illegal drugs A1 and A2. A chromatogram was run using methanol. The figure below shows the chromatogram.

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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Explain why mercury forms a convex meniscus and water a concave meniscus in a tube

asked Aug 5, 2021 in Physics Form 1 by anony mous

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State two uses of hydrogen gas

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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A balloon of volume 1.5cm3 containing helium gas at a pressure of 3.0 x 106pa is released from the ground when the temperature is 20°C. What will be the pressure when it reaches a point where the volume becomes 3.0m and the temperature 5°C

asked Aug 5, 2021 in Physics Form 1 by anony mous

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1 answer

A bullet traveling at a speed of 100ms−1 strikes a wall and penetrates 2cm. How long does the bullet take to stop after striking the wall?

asked Aug 5, 2021 in Physics Form 3 by anony mous

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When a piece of metal is place in water it sinks. But when the same piece of metal is placed on a block of wood it floats explain the observation

asked Aug 5, 2021 in Physics Form 4 by anony mous

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Hydrogen gas was prepared in the lab. Using the following set up

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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1 answer

Define the following terms: Electron affinity

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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2 answers

Define the following term: Ionization energy

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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