Description : An object which absorbs all colours and reflects none appears: (1) White (2) Grey (3) Blue (4) Black
Last Answer : (4) Black Explanation: A surface that absorbs all colours, reflecting none, is said to be black. Black is not a colour; it absorbs all the colours of the visible spectrum and reflects none of them to the eyes. White is a colour.
Description : An object which absorbs all colours and reflects none appears: (1) white (2) grey (3) blue (4) black
Last Answer : black
Description : Blue light is always less efficient in photosysthesis than (a) White (b) Red (c) Orange (d) Violet
Last Answer : (b) Red
Description : Higher concentration of CO2 in atmosphere (A) Allows visible solar radiation (ultraviolet) of short wave-length to pass through (B) Reflects and absorbs the longer wavelength (infra-red) radiations (C) Prevents solar heat being ... in 'heat trap' i.e., global warming (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : A pl ant leaf appears to be green because it (a) Absorbs green light (b) Reflects all but yellow and blue light (c) Reflects green light (d) Absorbs red and yellow light
Last Answer : Ans:(c)
Description : A black surface absorbs more heat radiations as compared to a white or a reflecting surface under identical conditions. List two solar devices which make use of this property in their design. -Science
Last Answer : Solar cooker, solar water heater.
Description : Germination is inhibited by— (A) Red light (B) Blue light (C) U.V. light (D) I.R. light
Last Answer : (C) U.V. light
Description : Maximum photosynthesis takes place in— (A) Blue light (B) Red light (C) Violet light (D) Green light
Last Answer : (D) Green light
Description : A body absorbs heat most if it is – (1) black and rough (2) black and smooth (3) white and rough (4) white and smooth
Last Answer : (1) black and rough Explanation: A black body is an idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence. Another property is roughness. Sand is rough and black and so it is a good absorber.
Description : A body absorbs heat most if it is (1) black and rough (2) black and smooth (3) white and rough (4) white and smooth
Last Answer : black and rough
Description : Match List-I with List-II and select answer from the codes given below- List-I (a) White Revolution (b) Grey Revolution (c) Blue Revolution (d) Green Revolution List-II 1. Fertilizer production 2. Fish production 3. Cereal production 4. Milk ... (A) 4 1 2 3 (B) 1 2 3 4 (C) 2 4 3 1 (D) 1 3 4 2
Last Answer : (A) 4 1 2 3
Description : Match the following: Revolutions Related to A White (i) Fishery B Blue (ii) Agriculture C Yellow (iii) Milk D Green (iv) oil seeds (a) A-iii, B-iv, C-ii, D-i (b) A-ii, B-iii, C-i, d-iv (c) A-iv, B-ii, C-i, D-iii (d) A-iii, B-ii, C-iv, D-ii
Last Answer : (d) A-iii, B-ii, C-iv, D-ii
Description : A hydrogen atom in ground state absorbs a photon of ultraviolet radiation of wavelength `50 nm` Assuming that the entire photon energy is taken up by
Last Answer : A hydrogen atom in ground state absorbs a photon of ultraviolet radiation of wavelength `50 nm` ... what kinetic energy will the electron be ejected?
Description : The increasing amount of CO2 in the atmosphere is slowly raising its temperature because it absorbs (a) the infrared part of the solar radiation (b) the ultraviolet part of the solar radiation (c) all the solar radiations (d) the water vapour of the air
Last Answer : Ans:(a)
Description : (3) it absorbs infrared radiation
Last Answer : Sullage water is – (1) waste water released from kitchen (2) waste water released from toilets (3) waste water released from factories (4) waste water released from hospitals
Description : A diathermanous substance __________ the thermal radiation completely. (A) Absorbs (B) Reflects (C) Transmits (D) None of these
Last Answer : (C) Transmits
Description : A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it. (A) Hydrogen (B) Carbon dioxide (C) Ozone (D) None of these
Last Answer : (C) Ozone
Description : ‘Vertisol’ is related to (A) Laterite soil (B) Red soil (C) Alluvial soil (D) Black soil
Last Answer : (D) Black soil
Description : The disease caused by Leptosphaeria sacchari in sugarcane is (a) Red rot (b) Black rot (c) Ring spot (d) Brown rot
Last Answer : (c) Ring spot
Description : Prabhat is an early short duration variety of –1) Black gram 2) Red gram 3) Green gram 4) Gram
Last Answer : 2) Red gram
Description : Natalie had fourteen balls. Each one color. She alternated the colors each day, there was a blue, pink, purple, green, red, yellow, black, white, orange, turquoise, tan, neon pink, and brown. Each day of the ... the week will she go to Arby's? What ball will she have while she is at Arby's? -Riddles
Last Answer : She will go to Arby's on Monday, for that is the first day of the week and A is the first letter of the alphabet. So on Tuesday she would go to Burger King. On Wednesday she would go to Chick- ... because red is the first color of the rainbow. So on Tuesday she would have a Orange ball. And so on.
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 : What are the primary colours? (a) Blue, green, yellow (b) Yellow, red, blue (c) Red, blue, green (d) Green, white, black
Last Answer : Ans:(b)
Description : To an astronaut in the spacecraft, the sky colour appears to be (a) Blue (b) White (c) Black (d) Orange red
Description : Persons who are colour-blind cannot distinguish between – (1) yellow and white (2) green and blue (3) red and green (4) black and yellow
Last Answer : (3) red and green Explanation: A person with colour-blindness has trouble seeing red, green, blue, or mixtures of these colours. The most common type is redgreen colours - blindness, where red and green are as the same colour.
Description : Person who is colorblind cannot distinguish between – (1) Black and yellow (2) Red and green (3) Yellow and white (4) Green and blue
Last Answer : (2) Red and green Explanation: Color blindness is the decreased ability to see color or differences in color. The most common form of colour blindness is known as red/green colour blind-ness and ... red and green hues due to the absence or mutation of the red or green retinal photoreceptors.
Description : In the absence of the earth's atmosphere, sky would appear – (1) blue (2) deep red (3) white (4) black
Last Answer : (4) black Explanation: Sky appears blue because the tiny particles of the earth's atmosphere scatter the blue colour (short wavelength) of the sunlight more dominantly than other wavelengths. A blue ... in the absence of earth's atmosphere because there would be no particles to scatter the light.
Description : Red + Green + Blue = ----? A. Maroon B. White (Answer) C. Black D. None of the above
Last Answer : B. White (Answer)
Description : What are the primary colors of Pigment? A. White, Black, Blue B. Red, Yellow, Blue (Answer) C. Red, Orange, Blue D. Red, Green, Blue
Last Answer : B. Red, Yellow, Blue (Answer)
Description : What are the primary colors of Light? 33 A. White, Black, Blue B. Red, Yellow, Blue C. Red, Orange, Blue D. Red, Green, Blue (Answer)
Last Answer : D. Red, Green, Blue (Answer)
Description : All the six faces of a cube of a cube are coloured with six different colours - black, brown, green, red, white and blue. 1. Red face is opposite to the black face. 2. Green face is between red and black ... face is in the bottom. Which face is opposite to green ? (a)Red (b)white (c) blue (d)brown
Last Answer : (c) blue
Description : All the six faces of a cube of a cube are coloured with six different colours - black, brown, green, red, white and blue. 1. Red face is opposite to the black face. 2. Green face is between red and black faces ... , brown, red (b) Blue, black, red, white (c) Red, black, blue, white (d) None of these
Last Answer : (a) Black, white, brown, red
Description : ______ are the combination of both white as well as black hat hackers. a) Grey Hat hackers b) Green Hat hackers c) Blue Hat Hackers d) Red Hat Hackers
Last Answer : a) Grey Hat hackers
Description : ________ are the combination of both white as well as black hat hackers. a) Grey Hat hackers b) Green Hat hackers c) Blue Hat Hackers d) Red Hat Hackers
Description : An astronaut in outer space will observe sky as (1) white (2) black (3) blue (4) red
Description : Person who is colourblind cannot distinguish between (1) Black and yellow (2) Red and green (3) Yellow and white (4) Green and blue
Last Answer : Red and green
Description : In the absence of the earth’s atmosphere, sky would appear (1) blue (2) deep red (3) white (4) black
Description : Which combination of colour is the most convenient during day and night time ? (1) Organe and blue (2) White and black (3) Yellow and blue (4) Red and green
Description : PAR (Photo-synthetically active radiation) is measured in (A)Photon (B) Watts (C) Einstein (D) Quantum
Last Answer : (C) Einstein
Description : What is the essential growth of and quantities development of fruits? a. Humidity b. Wind c. Solar Radiation d. Temperature e. Water
Last Answer : d. Temperature
Description : What pigment reflects orange yellow and red and absorbs the other colors to provide energy for photosynthesis?
Last Answer : Carotenoids.
Description : Which of the following plant pigments absorbs in red and far-red region of light? (1) Carotenoide (2) Chlorophyll (3) Phytochrome (4) elyptochrome
Last Answer : (3) Phytochrome Explanation: Phytochrorne is a photoreceptor, a pigment that plants use to detect light. It is a protein with a bilin chromophore. It detects mainly red and far-red region of the visible spectrum and regulates germination of seeds.
Description : A pigment which absorbs red and far-red light is (a) cytochrome (b) xanthophyll (c) phytochrome (d) carotene.
Last Answer : (c) phytochrome
Description : Which pigment absorbs the red and far-red light? (a) Cytochrome (b) Phytochrome (c) Carotenoids (d) Chlorophyll
Last Answer : (b) Phytochrome
Description : Which of the following plant pigments absorbs in red and farred region of light? (1) Carotenoide (2) Chlorophyll (3) Phytochrome (4) Cryptochrome
Last Answer : Phytochrome
Description : Why does a black board appears black in color? (1) It reflects black color (2) It absorbs black color (3) It reflects all colors (4) It absorbs all the colours
Last Answer : (4) It absorbs all the colors Explanation: When white light falls on an opaque body, it absorbs all the colors except one color which it reflects; this reflected color is the color of the body.
Description : A perfectly black body: (A) Is a diffuse emitter (B) Absorbs all the radiations of every wave lengths (C) Emits power of every wave length (D) All the above
Last Answer : Answer: Option D
Description : Blue revolution is related with: (A) Crops (B) Energy source (C) Fish (D) Oilseeds
Last Answer : (C) Fish
Description : As per the WTO Uruguay Round Agreement the domestic support creating tr ade distorting effect on agricultural commodities are included in...... (A) Green Box(B) Amber Box (C) Pink Box (D) Blue Box (E) None of these
Last Answer : (D) Blue Box
Description : ‘Blue Revolution’ is related to— a. Space research b. Irrigation c. Fisheries d. Drinking water e. None of the above
Last Answer : c. Fisheries