colours chemicals

8/10/2019 Colours Chemicals

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1Biosequestration is a process by which carbon sinks remove ______ from the atmosphere?

oxygen

nitrogen

argon

carbon dioxide

Ans:carbon dioxide

2_______sink is a natural or artificial reservoir that accumulates and stores some carbon containingchemical compounds for an indefinite period?

oxygen

helium

nitrogen

Carbon

Ans:Carbon

3Where is Indian Institute of Astrophysics?

Hyderabad

Chennai

Bangalore

Kerala

Ans:Bangalore

4Where is Indian Institute of Geomagnetism?

kolkata

Mumbai

Bihar

Bhopal

Ans:Mumbai

5Where is Agharkar Research Institute?

nagpur

haryana

indore

pune

Ans:pune

6Where is Birbal Shahni institute of Palaeobotany?

assam

orissa

goa


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lucknow

Ans:lucknow

7Which of the following belongs to biodiesel production?

jatropha lureas

pongamia pinnata

both a and b

none of the above

Ans:both a and b

8The formation of brilliant colour in a soap film is due to?

multiple refraction

interference

both a and b

none of the aboveAns:both a and b

9What is the colour of Litium oxide?

red

yellow

green

white

Ans:white

10What colour is Lithium peroxide?

Black

White

Yellow

Orange

Ans:White

11What colour is Lithium superoxide?

Yellow

Blue

Brown

Black

Ans:Yellow

12What is the colour is magnesium oxide?

White

red


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yellow

green

Ans:White

13What is the colour of zinc oxide?

White

Yellow

Orange

Blue

Ans:White

14What is the colour of sodium oxide?

Black

Yellow

Blue

White

Ans:White

15What is the colour of sodium superoxide?

Yellow

Green

Orange

Blue

Ans:Yellow

16What is the colour of manganese monoxide?

Yellow

Brown

Green

White

Ans:Green

17What is the colour of manganese dioxide?

Black

Green

Blue

White

Ans:Black

18What is the colour of manganese trioxide?

Red


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Green

Orange

Purple

Ans:Red

19What is the colour of potassium oxide?

pale yellow

green

grey

blue

Ans:pale yell ow

20What is the colour of ferric oxide?

Orange

Green

Brown

Black

Ans:Brown

21What is the colour of Chromic oxide?

Blue

Red

Yellow

Green

Ans:Green

22What is the colour of Cobalt oxide?

Orange

green

grey

blue

Ans:blue

23Which metal is used in the photography?

silver nitrate

silver iodide

silver amalgam

silver bromide

Ans:sil ver bromide

24What is the chemical used in tear gas?


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30What is used as non sticking coat on frying pans?

Marble

Ceramic

Teflon

Granite

Ans:Teflon

31What is added to the cement to slow down the rate of setting of cement?

Limestone

Marble

Gypsum

Pyrex

Ans:Gypsum

32_____is a process of heating a food, which is usually a liquid, to a specific temperature for a predefinedlength of time and then immediately cooling it after it is removed from the heat.

Sterilisation

Pasteurization

Isolation

Insolation

Ans:Pasteurization

33_________and _______are processes that use fuel gases and oxygen to weld and cut metals,respectively. Oxy-fuel is one of the oldest welding processes. Still used in industry, in recent decades ithas been less widely utilized in industrial applications.

Oxy-fuel welding

oxy-fuel cutting

both a and b

none of the above

Ans:both a and b

34The gas used in the lighter is?

Freon

Butane

Propane

Pyrex

Ans:Butane

35Which gas is used in Flash lamp?

Xenon

Neon


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Argon

Propane

Ans:Xenon

36_________ is used as a fuel for engines, oxy-gas torches, barbecues, portable stoves, and residential

central heating.

Xenon

Propane

Freon

Butane

Ans:Propane

37Azurite is a soft, deep blue copper mineral produced by weathering of _________ore deposits.

Iron

Copper

Silver

Tin

Ans:Copper

38Cassiterite is a ______oxide mineral, SnO2. It is generally opaque, but it is translucent in thin crystals?

Copper

Tin

Iron

Gold

Ans:Ti n

39Cinnabar is the common ore of________. Cinnabar is generally found in a massive, granular or earthyform and is bright scarlet to brick-red in color.

Salt

Platinum

mercury

Bronze

Ans:mercury

40Halite commonly known as_________, is the mineral form of sodium chloride (NaCl).

Mercury

rock salt

Tin

Iron

Ans:rock salt

41_______ is a white or colourless soft solid that is used as a lubricant and for other applications.


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Mercury

Platinumc

Paraffin wax

CinnabarAns:Paraffin wax

42____is a compound composed of carbon and a less electronegative element?

Carbide

Glycerol

Paraffin wax

Cinnabar

Ans:Carbide

43_______or glycerin is a simple polyol compound. It is a colorless, odorless, viscous liquid that is widelyused in pharmaceutical formulations. It is sweet-tasting and of low toxicity?

Carbide

Azurite

Glycerol

Cassiterite

Ans:Glycerol

44Tritium also known as _______is a radioactive isotope of hydrogen.

hydrogen-2

hydrogen-4

hydrogen-6

hydrogen-3

Ans:hydrogen-3

45A carboxylic acid is an organic acid characterized by the presence of at least one carboxyl group. Itsformula is usually written as _______?

COHO

COOH

CHOO

OHCO

Ans:COOH

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