Description : Which of the following is a natural dye? (1) Crystal violet (2) Aniline blue (3) Alizarin (4) Phenolphthalein
Last Answer : (3) Alizarin Explanation: Alizarin or 1,2- dihydroxyanthraquinone (also known as Mordant Red 11 and Turkey Red is an organic compound with formula C14H8O4 that has been used throughout history as a ... of the madder genus. In 1869, it became the first natural pigment to be duplicated synthetically.
Description : A medium containing crystal violet dye plus sodium deoxycholate will allow A- gram (-)ve intestinal bacteria to grow B- gram (+)ve intestinal bacteria to grow C- .aquatic bacteria to grow D- none of these
Last Answer : gram (-)ve intestinal bacteria to grow
Description : Select from the following the statement which is true for bases. (a) Bases are bitter and turn blue litmus red. (b) Bases have a pH less than 7 (c) Bases are sour and change from red litmus to blue. (d) Bases turn pink when a drop of phenolphthalein is added to them.
Last Answer : Answer: (d) Bases turn pink when a drop of phenolphthalein is added to them.
Description : The most common constituents of alkalinity in natural water are measured by titrating the water sample with 0.02 N H2SO4 using (a) Eriochrome Black T and Ferroin indicators (b) Ferroin ... (c) Phenolphthalein and Methyl Orange indicators (d) Methyl Orange and Ericochrome Black T indicators
Last Answer : (c) Phenolphthalein and Methyl Orange indicators
Description : Do Crystal Protect Cases come in any other colors besides violet?
Last Answer : It comes in four exciting colors.Green,Blue and Violet are three of them.
Description : Gram positive cells have a A- second outer membrane that helps to retain the crystal violet stain B- multiple layer of peptidoglycan that helps to retain the crystal violet stain C- .thick capsule that traps the crystal violet stain D- periplasmic space that traps the crystal violet
Last Answer : multiple layer of peptidoglycan that helps to retain the crystal violet stain
Description : Which of the following is NOT a general property of hydroxide bases in aqueous solution? w) High solubility x) Bitter taste y) Ability to neutralize aqueous acid solutions z) Ability to change phenolphthalein from colorless to red
Last Answer : ANSWER: W -- HIGH SOLUBILITY (The hydroxides of the alkali metals are soluble in water but all the other metal hydroxides are only moderately or sparingly soluble.)
Description : The colour of Emerald is - (1) Violet (2) Yellow (3) Deep Green (4) Prussian Blue
Last Answer : (3) Deep Green Explanation: The most desirable emerald colors are bluish green to pure green, with vivid color saturation and tone that's not too dark. The most-prized emeralds are highly transparent. Their color is evenly distributed, with no eyevisible colorzoning.
Description : The DNA fragments separated on an agarose gel can be visualised after staining with (a) acetocarmine (b) aniline blue (c) ethidium bromide (d) bromophenol blue.
Last Answer : (c) ethidium bromide
Description : The DNA fragments separated on an agarose gel can be visualised after staining with : (1) Acetocarmine (2) Aniline blue (3) Ethidium bromide (4) Bromophenol blue
Last Answer : (3) Ethidium bromide
Description : A solution containing `Na_(2)CO_(3)` and `NaOH` requires `300 ml` of `0.1 N HCl` using phenolphthalein as an indicator. Methyl orange is then added to
Last Answer : A solution containing `Na_(2)CO_(3)` and `NaOH` requires `300 ml` of `0.1 N HCl` using phenolphthalein ... solution is `(NaOH=40, Na_(2)CO_(3)=106)`
Description : When phenolphthalein is added to a basic solution what happens?
Last Answer : Phenolphthalein is added to a basic solution is colorless.
Description : PH is the negative logarithm of the hydrogen Ion Concentration express4ed in moles/liter of aqueous solution. PH of buffer solution is calculated by. Henderson's equation Name the best ... Chemical kinetics deals with study of. Rates and mechanisms of chemical and Biochemical reactions
Last Answer : What does Thermodynamics helps in predicting ?
Description : The colour of phenolphthalein in acid?
Last Answer : No colour
Description : The colour of phenolphthalein in base?
Last Answer : Pink
Description : In phenolphthalein solution bases turns into (a) Pink (b) Yellow (c) Orange (d) Colourless
Last Answer : (a) Pink
Description : Which of the following purgatives undergoes enterohepatic circulation to produce prolonged action: A. Docusates B. Phenolphthalein C. Castor oil D. Mag. sulfate
Last Answer : B. Phenolphthalein
Description : If you added a lot of royal blue to hot pink would it make blue violet?
Last Answer : I assume this is paint you’re talking about? Try 4 parts hot pink with 2 or 3 parts royal blue. Add it in gradually, mixing as you go, until it looks right.
Description : Violet, indigo, blue and green, yellow, orange and red; these are the colors you have seen after the storm has fled. What am I? -Riddles
Last Answer : I am a Rainbow.
Description : A colorless salt gives violet colour to Bunsen flame and also turns moisture litmus paper blue. It is :
Last Answer : A colorless salt gives violet colour to Bunsen flame and also turns moisture litmus paper blue. It is : A. `Na_(2) ... C. `NaNO_(3)` D. `K_(2)CO_(3)`
Description : 23 Which one of the following sets of colour combinations is added in colour vision in TV? A. Red, green and blue B. Orange, black and violet C. White, red and Yellow D. Green, Yellow and Blue
Last Answer : ANSWER: A
Description : Lights of different colours are arranged below in order of increasing wavelengths: 1. Violet, indigo, blue 2. Green, orange, red 3. Red, green, indigo 4. Blue, green, yellow Which of the above are in proper sequence? (a) 1 only (b) 1 and 2 (c) 2 and 3 (d) 1 and 4
Last Answer : Ans:(d)
Description : Maximum photosynthetic activity occurs in - (1) blue and red region of light (2) green and yellow region of light (3) blue and orange region of light (4) violet and orange region of light
Last Answer : (1) blue and red region of light Explanation: Wavelength of light between 400 nm and 700 nm is most effective for photosynthesis. This light is called photo synthetically active radiation (PAR). ... in red and minimum in blue region. In both these regions light is absorbed by chlorophylls.
Description : Which of the following types of light are strongly absorbed by plants? (1) Violet and orange (2) Blue and red (3) Indigo and yellow (4) Yellow and violet
Last Answer : (2) Blue and red
Description : A man with colour blindness will see red as - (1) Yellow (2) Blue (3) Green (4) Violet
Last Answer : (3) Green Explanation: Colour-blindness is the inability to distinguish the differences between certain colours. This condition results from an absence of colour-sensitive pigment in the cone cells of the ... type is red-green colour-blindness, where red and green are seen as the same color.
Last Answer : (2) Blue and red Explanation: As shown in detail in the absorption spectra, chlorophyll absorbs light in the red (long wavelength) and the blue (short wavelength) regions of the visible light spectrum. Green light is not absorbed but reflected.
Description : Which components of light are absorbed by chlorophyll? (1) Violet and red (2) Indigo and orange (3) Blue and red (4) Violet and yellow
Last Answer : (1) Violet and red Explanation: Chlorophyll is a green pigment found in cyanobacteria and the chloroplasts of algae and plants. Chlorophyll is an extremely important biornolecule, critical in ... and near-green portions of the spectrum, hence the green color of chlorophyll-containing tissues.
Description : When white light passes through a glass prism we get a spectrum on the other side of the prism. In the emergent beam the ray which is deviated least is - (1) the violet ray (2) the red ray (3) the green ray (4) the blue ray
Last Answer : (2) the red ray Explanation: Red is deviated the least and violet the most.
Description : Sensitivity of the human eye is maximum in the – (1) Violet region (2) Green region (3) Blue region (4) Red region
Last Answer : (2) Green region Explanation: The human eye is sensible to light wave which wavelength is roughly between 400 nm and 700 nm. When illumination is enough (in daylight) the maximum sensitivity is in the green region at 555 nm.
Description : Which of the following colors of light rays has the shortest wavelength? A. Yellow B. Violet C. Red D. Blue
Last Answer : B. Violet
Description : Which one of the following sets of color combinations is added in color vision in TV’? A. Red, green and blue (Answer) B. Orange, back and violet C. White. red and yellow D. Yellow, green and blue
Last Answer : A. Red, green and blue (Answer)
Description : Maximum photosynthesis takes place in— (A) Blue light (B) Red light (C) Violet light (D) Green light
Last Answer : (D) Green light
Description : Blue light is always less efficient in photosysthesis than (a) White (b) Red (c) Orange (d) Violet
Last Answer : (b) Red
Description : Which of the following colour is least scattered by fog, dust or smoke : A. Violet B. Blue C. Red D. Yellow
Last Answer : C. Red
Description : Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plants? (a) Blue and green (b) Green and red (c) Red and violet (d) Violet and blue
Last Answer : (d) Violet and blue
Description : One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of (a) violet and green light (b) indigo and green light (c) orange and yellow light (d) blue and red light.
Last Answer : (d) blue and red light.
Description : In refraction that occurs in air/glass interfaces, among the visible light, which is the bent the least? ∙ A. violet ∙ B. blue ∙ C. red ∙ D. orange
Last Answer : C. red
Description : A beam of white light is passed through a diffraction grating and the resulting spectrum is allowed to fall on a screen. Which one of the following is the color of light that undergoes the greatest deviation from its original direction? Is it: A. Red B. yellow C. Blue D. violet Engineering
Last Answer : A. Red
Description : A color with a wavelength longer than that of yellow is: A. Red B. Blue C. Violet D. Green
Description : A color with a wavelength longer than that of yellow is: w) red x) blue y) violet z) green
Last Answer : ANSWER: W -- RED
Description : A beam of white light is passed through a diffraction grating and the resulting spectrum is allowed to fall on a screen. Which one of the following is the color of light that undergoes the greatest deviation from its original direction. Is it: w) red x) yellow y) blue z) violet
Description : A man with colour blindness will see red as (1) Yellow (2) Blue (3) Green (4) Violet
Last Answer : Green
Description : Which components of light are absorbed by chlorophyll ? (1) Violet and red (2) Indigo and orange (3) Blue and red (4) Violet and yellow
Last Answer : Violet and red
Description : Maximum photosynthetic activity occurs in : (1) blue and red region of light (2) green and yellow region of light (3) blue and orange region of light (4) violet and orange region of light
Last Answer : blue and red region of light
Description : Sensitivity of the human eye is maximum in the (1) Violet region (2) Green region (3) Blue region (4) Red region
Last Answer : Green region
Description : What is the primary dye used in manufacturing blue jeans, and khakis, respectively?
Last Answer : answer:The color for blue jeans is indigo dye. Don’t know about khaki’s.
Description : Is there a dye to turn urine blue in swimming pools?
Last Answer : Your pee will not turn blue if you pee in an outdoor swimming pool. Pee turning blue in a swimming pool is just used as comedy in the movies and is not likely to happen in real life.
Description : What is the name of the dye which turns red on contact with acid and blue with alkali?
Last Answer : Litmus
Description : Why is the percentage of crystal attachment in Blue-Vitrio more than 100 ?
Last Answer : : The percentage of blue vitriol ( CuSO4.5H20) is more than 100 percent due to its five atoms of crystalline water.
Description : If the crystal is moistened with water which colour of crystals appear---- (a) Green (b) Red (c) Blue (d) Yellow
Last Answer : (c) Blue