Hypo (sodium thiosulphate) because of its complex forming behaviour is used in photography to remove undecomposed silver bromide as a soluble complex for __________ of the picture.

__________ nature of hypo (sodium thiosulphate) makes it useful in photography.

A

Oxidising

B

Reducing

C

Complex forming

D

Photochemical

Function of sodium thiosulphate (hypo) in development of photographic film/plate is to

A

Brighten the faint images

B

Remove metallic silver

C

Convert silver chloride to silver

D

Remove unexposed silver halide

The chemical name of 'Hypo' commonly used in photography is

A

Sodium thiosulphate

B

Silver nitrate

C

Sodium nitrate

D

Silver iodide

A certain dentist specializes in implanting gold and silver teeth in his patients mouths .He charges $ 650 for a gold tooth an $ 325. for a silver tooth. If his told fees for implanting gold and silver teeth last week were $ 15, 925 in total and he implanted five more gold teeth that silver teeth, how many teeth in total did he implant over the week?

A

33

B

32

C

31

D

34

In a rare coin collection, all coins are either pure gold or pure silver , and there is initially one gold coin for every three silver coins . With the addition of 10 more gold coins to the collection, the ratio of gold coins to silver coins is 1 to 2. Based on this information , how many total coins are there now in this collection (after the acquisition)?

A

40

B

50

C

70

D

90

স্লাইডে ছবি যুক্ত করার জন্য-i. Insert মেনুর রিবনে picture আইকন click করতে হবেii. Insert picture বক্স থেকে ছবি সংযোগ করতে হবেii. Picture রেডিও বোতাম সক্রিয় করতে হবেনিচের কোনটি সঠিক?

A

i ও ii

B

i ও iii

C

ii ও iii

D

i, ii ও iii

Steel with __________ carbon is known as hypo-eutectoid steel.

A

0.8%

B

Below 0.8%

C

Above 0.8%

D

None of these

Hypo-complementaemia is a feature of

A

Systemic lupus erythematosus (SL

B

Post streptococcal glomerulonephritis

C

Minimal change nephrotic syndrome

D

Rheumatoid arthritis

E

Acute pyelonephritic

In process annealing, the hypo eutectoid steel is

A

Heated from 30°C to 50°C above the upper critical temperature and then cooled in still air

B

Heated from 30°C to 50°C above the upper critical temperature and then cooled suddenly in a suitable cooling medium

C

Heated from 30°C to 50°C above the upper critical temperature and then cooled slowly in the furnace

D

Heated below or closes to the lower critical temperature and then cooled slowly

In a hardening process, the hypo-eutectoid steel is

A

Heated from 30°C to 50°C above the upper critical temperature and then cooled in still air

B

Heated from 30°C to 50°C above the upper critical temperature and then cooled suddenly in a suitable cooling medium

C

Heated from 30°C to 50°C above the upper critical temperature and then cooled slowly in the furnace

D

Heated below or closes to the lower critical temperature and then cooled slowly

Hypo (sodium thiosulphate) because of its complex forming behaviour is used in photography to remove undecomposed silver bromide as a soluble complex for __________ of the picture.

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