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The metal that is present in Photo Films is

A. Silver

B. Magnesium

C. Platinium

D. Mercury

Correct Answer :

A. Silver


Related Questions

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Which of the following is commonly called a polyamide ?

A. Orion

B. Terylene

C. Rayon

D. Nylon

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4

One fathom is equal to

A. 6 feet

B. 6 metres

C. 60 cms

D. 60 feet

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4

The colour of Emerald is

A. Deep Green

B. Violet

C. Prussian Blue

D. Yellow

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4

According to Daltons atomic theory the smallest particle which can exist independently is

A. An atom

B. A cation

C. A molecule

D. An anion

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4

What is the unit for measuring the pitch or frequency of sound ?

A. Coulomb

B. Hum

C. Cycles

D. Decible

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4

The removal of top soil by water or wind is called

A. Soil erosion

B. Soil wash

C. Silting of soil

D. Soil creep

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4

Old-written material, which cannot be read easily can be read by

A. None of these

B. Ultraviolet rays

C. Infra Red rays

D. Cosmic Rays

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4

Epoxy resins is used as

A. Adhesives

B. Detergents

C. Insecticides

D. Moth repellants

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4

Which of the following elements is obtained from sea weeds ?

A. Argon

B. Vanadium

C. Iodine

D. Sulphur

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4

Quartz crystals normally used in quartz clocks etc. is chemically

A. A mixture of B and C

B. Silicon dioxide

C. Germenium dioxide

D. Sodium Silicate

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4

The metallic constituents of hard water are

A. Calcium, magnesium and iron

B. Magnesium, Calcium and tin

C. Magnesium, tin and iron

D. Iron, tin and calcium

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4

The chemial name of Uria is

A. Carbamide

B. Chloroetane

C. Aneurin

D. None of these

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4

Permanent hardness of water can be removed by adding

A. Potassium Permanganate

B. Bleaching Powder

C. Chlorine

D. Washing Soda

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4

Water has maximum density at

A. 0°C

B. -4°C

C. 100°C

D. 4°C

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4

The smallest functional and structural unit of kidney is called as

A. Granulocyte

B. Neuron

C. Reticulocyte

D. Nephron

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4

Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of

A. Sulphonates

B. Zeolites

C. Nitrates

D. None of these

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4

In a certain electronic circuit the output is positive if input 1 is positive and input 2 is zero. If both inputs are positive the output is zero. This is

A. an AND circuit

B. an OR circuit

C. a high-pass filter

D. a NOR circuit

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4

Nitrification means

A. Conversion of nitrogen to nitric acid.

B. Production of nitrogen from air

C. Convert the atmospheric nitrogen to effective nitrogen compound.

D. Liquifaction of nitrogen

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4

Lightening cause rainfall because

A. It activate H2O molecule

B. Photo-electricity reaction starts

C. Some of the gas molecules become bigger

D. It cause combination of oxygen and nitrogen

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4

The hardest substance available on earth is

A. Platinum

B. Quartz

C. gold

D. Diamond

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4

Which of the following characters is not shown by hydrogen

A. It burns in air to form water

B. It supports combustion

C. It readily combines with fluorine and chlorine

D. It combines with almost all metals forming hydrides

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4

When a gas is turned into a liquid, the process is called

A. evaporation

B. condensation

C. sublimation

D. deposition

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4

The formula of Plaster of Paris is

A. 2CaSO4, H2O

B. CaSO4

C. CaSO4, 2H2O

D. 2CaSO4, 4H2O

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4

In an atomic nucleus, neutrons and protons are held together by

A. Magnetic forces

B. Gravitational forces

C. Coulombic forces

D. Exchange forces

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4

The speed of light with the rise in the temperature of the medium

A. Increases

B. Remains unaltered

C. Drops sharply

D. Decreases

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4

The most important ore of Aluminium is

A. Calamine

B. Calcite

C. Galena

D. Bauxite

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4

The type of glass used in making prisms and lenses is

A. Pyrex glass

B. Soft glass

C. Flint glass

D. Jena glass

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4

Which of the following parts of the sun is easily visible only during a total solar eclipse?

A. core

B. photosphere

C. sunspots

D. corona

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4

Pollination by birds is called

A. autogamy

B. entomophily

C. anemophily

D. ornithophily

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4

The marine animal called dugong which is vulnerable to extinction is a/an

A. Amphibian

B. Shark

C. Bony fish

D. Mammal