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Mark the appropriate choice to fill up t...

Mark the appropriate choice to fill up the blanks in the given paragraph.
A solution which maintains constant pH when small amounts of acid or base are added is known as a `ul((i))`. A mixture of acetic acid and sodium acetate acts as `ul((ii))` with a pH around `ul((iii))` and a mixture of ammonium chloride and ammonium hydroxide acts as `ul((iv))` with a pH around `ul((v))`

A

`{:((i),(ii),(iii),(iv),(v),),("buffer capacity","basic buffer",9.25,"acidic buffer",4.75,):}`

B

`{:((i),(ii),(iii),(iv),(v),),("buffer solution","acidic buffer",9.25,"basic buffer",4.75,):}`

C

`{:((i),(ii),(iii),(iv),(v),),("buffer solution","basic buffer",4.75,"acidic buffer",9.25,):}`

D

`{:((i),(ii),(iii),(iv),(v),),("buffer solution","acidic buffer",4.75,"basic buffer",9.25,):}`

Text Solution

Verified by Experts

The correct Answer is:
D
Acidic buffer has a pH of around 4.75 and basic buffer has a pH around 9.25.
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Knowledge Check

  • Given below are four statement (i) - (iv) each with two blanks. Select the option which correctly fills up the blanks in any two of these statements (i) The columnar epithelium is composed of ul(1) and slender cells. Their ul(2) are located at the base (ii) Collagen fibres provide ul(3) and elastin fibres provide ul(4) and elasticity to the tissue (iii) Adipose tissue is a ul(5) type of connective tissue located mainly beneath ul(6) (iv) Tendons attach ul(7) to bones and ligaments attach ul(8) to bones.

    A
    (1) tall, (2) nuclei, (7) bones, (8) muscles
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    (1) short, (2) organelles, (3) strength, (4) flexibility
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  • Wet Plate Photography: An Old Technique Makes a New Splash [1] Upon the arrival of the digital camera, professional photographers harrumphed that 23 ul"they" produced ugly, low-resolution images. [2] Yet eventually the vast majority of them traded film for megapixels. [3] The latest digital cameras take pictures so crisp that the images in them appear to be die-cut. [4] Even today’s humblest smartphones snap bright, sharp photos. [5] A few contemporary photographers, however, have embraced an anachronistic method that was state-ofthe- art technology when it was invented in 1851: wet plate photography. 24 Wet plate photographers essentially create their own film. The process can be dangerous, given that it requires the use of several volatile chemicals. 25 To take a wet plate photograph, photographers usually first arrange or pose 26 ul"it’s" subjects before mixing collodion (a viscous, light-sensitive chemical solution) with bromide, iodide, or chloride and applying the mixture to a clean, polished glass plate. Dried collodion is unusable, 27 ul"so" once the photo is snapped with a massive, tripod-mounted camera, the photographer has 28 ul"nominal" minutes to develop it, using more chemicals. When the image appears in the negative, water is used to stop the process. A chemical “fix bath” turns the negative image into a positive one. The photo is then immersed in water and warmed. 29 ul"In conclusion" , it is coated with lavender 30 ul"oil to give it (a protective finish)." Wet plate photos are marvelously fine-grained and detailed, and they seem to glow with an ethereal silvery light. One misstep or a speck of dust on the glass plate, though, and flaws appear. Smudges resembling oyster shells 31 ul"swirl" around the photos’ edges. Sunbursts or streaks emerge where collodion pools unevenly. Since the film requires long exposures, moving subjects blur. 32 ul"A shifting arm or leg might even disappear because of the lengthy exposure time required" . The exposure time required explains why people in wet plate photographs often look dour: it’s hard to hold a smile for that long. Prominent among contemporary wet plate photographers is Joni Sternbach, whose work centers, appropriately, on water and people’s relationship to it. Sternbach’s photo series Ocean Details, Sea/Sky, and SurfLand depict surging surfs, roiling waves, and the surfers who ride them. 33 ul"Her subjects could be nineteenth-century wave riders" , if not for the modern board shorts and bikinis they wear. Sternbach characterizes wet plate photography as “one part photography, one part performance art, and one part three-ring circus,” a worthwhile endeavor because it produces the unique, haunting images she seeks. “When I look at a digital print,” she says, “it might be gorgeous and smooth, but it’s on a piece of paper and it’s one of many.”

    A
    NO CHANGE
    B
    it
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    D
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