Colour mixing

Correct answer: A. Blue

Explanation: The relevant concept is subtractive mixing in CMY printing. Cyan ink removes much of the red component from white light, and magenta ink removes much of the green component; the remaining reflected light is mainly blue. Therefore option A is correct. Magenta plus yellow is associated with red, while cyan plus yellow is associated with green. Orange is not the standard primary-pair result in CMY.

Correct answer: B. Red

Explanation: In the subtractive CMY printing model, magenta absorbs much of the green part of white light and yellow absorbs much of the blue part. The light left to reflect is predominantly red, so option B is correct. Cyan plus yellow gives green, cyan plus magenta gives blue, and cyan itself is a primary printing colour rather than the usual result of magenta and yellow. This also shows that colour names depend on the medium.

Correct answer: A. Subdue some colours with complements or neutrals

Explanation: The governing concept is control of saturation and colour harmony. If every primary colour is highly vivid, carefully adding a small amount of a complementary or neutral colour can reduce intensity and prevent visual competition. White mainly lightens a colour and may create tints without solving the overall imbalance. Adding more pure pigment increases vividness, while equal quantities do not guarantee harmony. Therefore option A is the best correction.

Correct answer: B. Black or nearly black

Explanation: The governing concept is subtractive colour mixing, because pigments absorb selected wavelengths instead of adding emitted light. Cyan absorbs much red, magenta absorbs much green, and yellow absorbs much blue. Together they remove most of the visible spectrum, so an ideal mixture appears black. Real inks and paints may produce a muddy dark colour rather than perfect black; therefore option B is correct.

Correct answer: B. Red

Explanation: The governing concept is subtractive colour mixing, used with pigments and inks. Magenta absorbs green light, while yellow absorbs blue light; the red component is reflected by both pigments. Therefore, magenta plus yellow produces red. Blue is associated with cyan plus magenta, green with cyan plus yellow, and cyan is not the result of this pair.

Correct answer: A. Green

Explanation: This question applies the subtractive CMY model for pigments. Cyan absorbs red light and yellow absorbs blue light; the remaining reflected light is mainly green. Thus, cyan mixed with yellow gives green. Red would result from magenta and yellow, blue from cyan and magenta, and magenta is itself one of the subtractive primary colours.

Correct answer: B. Additive adds light while subtractive pigments absorb light

Explanation: The governing distinction is the medium and the way light is handled. Additive mixing combines emitted coloured light, as in RGB screens; adding more light moves the result toward white. Subtractive mixing uses pigments or inks that absorb selected wavelengths, reducing reflected light. Therefore option B is correct; paper uses subtractive mixing and screens use additive mixing, contrary to C and D.

Correct answer: B. Mixing three colours often does not give a clean deep black

Explanation: Commercial colour printing commonly uses CMYK: cyan, magenta, yellow and black. In theory, cyan, magenta and yellow can absorb much of the visible spectrum, but real inks are imperfect and their combination often produces a muddy dark brown or grey rather than a strong neutral black. A separate black ink gives deeper shadows, sharper text and more economical coverage, so B is correct.

Correct answer: A. Intensity decreases and a tone is formed

Explanation: The governing concept is colour intensity, also called saturation or chroma. Grey contains both black and white, so mixing it with a primary colour usually reduces the colour’s intensity and creates a muted tone. Option A is correct. The result does not automatically become a secondary colour or pure white, and the original hue family generally remains identifiable even though it is subdued.

Correct answer: A. It reflects very little blue light

Explanation: The governing concept is selective reflection: an object’s apparent colour depends on both its surface properties and the light illuminating it. A red object mainly reflects red wavelengths and absorbs much of the other available light. Under blue illumination, little red light is present and the object reflects relatively little blue, so it can look very dark. Option A is correct; the other statements misuse emission, colour, or reflection.

Correct answer: A. It mainly reflects red and green light and absorbs more blue

Explanation: The governing concept is subtractive colour behaviour in pigments. White light contains many visible components; a yellow pigment absorbs more of the blue component and reflects relatively more red and green components. The combination reaching the eye is perceived as yellow, so option A is correct. It is not an emitting source, does not absorb all light, and does not reflect only blue light.

Correct answer: A. Red

Explanation: The governing concept is the subtractive complementary relationship used for pigments. Cyan is formed by the light components green and blue, so a cyan pigment mainly reflects those components while absorbing its complementary component, red. Therefore option A is correct. It does not mainly absorb green or blue, and white is the complete mixture of visible light rather than one colour component in this context.

Correct answer: B. Green

Explanation: The governing concept is subtractive colour mixing. Magenta pigment reflects the red and blue components of white light more strongly, while it mainly absorbs the complementary green component. Thus option B is correct. It is not mainly red or blue, because those are the components associated with magenta’s reflected appearance. Yellow is a combined light perception, not the principal single component absorbed by magenta pigment.

Correct answer: C. Blue

Explanation: The governing concept is selective absorption in subtractive colour theory. Yellow pigment appears yellow because it reflects relatively more red and green light while mainly absorbing blue light. Therefore option C is correct. Red and green contribute to the reflected yellow appearance, whereas cyan is a mixture of green and blue rather than the single component that the pigment primarily removes. The exact response can vary slightly by pigment, but the school-level rule is clear.

Correct answer: A. From yellow-green toward blue-green

Explanation: Yellow and blue are mixed to produce green. At the beginning, when yellow is dominant, the mixture appears yellow-green. As more blue is added, the balance moves through green toward blue-green. This is a change in colour bias caused by altering the proportion of the two pigments, not a change from orange, violet, or grey. Thus the progression described in option A is the most suitable answer.

Correct answer: B. More red and less blue

Explanation: Violet is produced by mixing red and blue pigments. The visual character of the mixture depends on their relative proportions: increasing blue makes a bluer violet, while increasing red makes a red-dominant or reddish violet. Therefore, using more red and less blue gives the requested result. Option C would move the mixture toward a duller, warmer neutralised colour, and option D produces orange rather than violet. Option B is correct.

Correct answer: A. A trace of yellow is present

Explanation: Red and blue normally combine to make violet, but a trace of yellow introduces all three primary pigment components. The yellow partially neutralises the red-blue mixture, reducing saturation and making the violet look dull or muddy. Clean colours would help preserve brightness, and white paper does not itself create this pigment contamination. A dry brush may affect application, but it is not the most likely chemical colour cause. Hence, option A is correct.

Correct answer: A. A small trace of red

Explanation: Green is produced by mixing yellow and blue, and red is its complementary colour in the traditional pigment colour wheel. If even a small amount of red contaminates the mixture, it partially neutralises the green and lowers its saturation, making the result look muddy or brownish. Clean yellow, clean blue, and a clean palette reduce contamination rather than causing it. Therefore, the small trace of red in option A is the correct explanation.

Correct answer: B. The intensity decreases toward neutrality

Explanation: Complementary pigments absorb different portions of visible light, and when they are mixed, their combined absorption reduces the reflected colour intensity. The mixture usually becomes duller and moves toward a neutral brown, grey, or other subdued colour, depending on the pigments and their proportions. It does not normally become white, purer, or automatically primary. Therefore option B is correct, while the word “generally” allows for variation among actual paint materials.

Correct answer: B. Toward the colour used in the greater amount

Explanation: When complementary red and green pigments are mixed, they reduce each other’s saturation, but unequal proportions mean that one colour contributes more strongly to the final appearance. The pigment present in greater quantity normally leaves a stronger colour bias, although pigment strength and transparency can also affect the precise result. Thus option B is the best general answer. Option A reverses the effect, while C and D make unsupported claims that the mixture must always shift toward yellow or blue.

Correct answer: A. Add a small amount of its complementary colour

Explanation: The governing concept is saturation, also called intensity or chroma. Adding a small amount of the colour’s complement introduces opposing colour information and makes the mixture less vivid, so the primary colour becomes muted. The amount must be controlled because too much complement can produce a dull or near-neutral result. Adding more of the same colour usually preserves intensity, while changing paper or removing water does not directly mix a complementary hue.

Correct answer: A. Yellow

Explanation: The governing concept is additive colour mixing in emitted light. A screen uses red, green and blue light sources; when red and green light are emitted at equal intensities, their wavelengths stimulate the eye together and are perceived as yellow. Orange would require a different balance, blue comes from the blue channel, and black represents little or no emitted light. This rule applies to light, not to mixing physical pigments.

Correct answer: A. More wavelengths are absorbed

Explanation: The governing concept is subtractive colour mixing. A pigment reflects some wavelengths and absorbs others; when additional pigments are mixed, the combined material usually absorbs a wider or greater portion of the incident light. Less light returns to the eye, so the mixture appears darker and often less saturated. It does not produce extra light, turn the paper black by itself, or become a light source. Therefore option A is correct.

Correct answer: A. One uses pigment mixing and the other uses light mixing

Explanation: The governing concept is the difference between subtractive and additive colour systems. Paint primarily works by absorbing selected wavelengths from reflected light, so traditional art instruction may use a pigment-based set such as RYB, while a screen emits light using RGB channels. The media therefore require different practical primaries. Screens display real light, blue is present, and painting is not limited to warm colours. Option A is correct.

Correct answer: B. The intensity of orange will decrease

Explanation: The governing concept is complementary colour interaction in pigment mixing. Orange and blue are complementary opposites on a conventional colour wheel. Adding a small amount of the complement introduces opposing colour information, reducing saturation or intensity and moving the mixture toward a duller, more neutral brown or grey. It does not make orange brighter, automatically turn it green, or change its status into a primary colour. Therefore option B is correct.