GSEB Solutions for ધોરણ ૧૦ Gujarati

GSEB std 10 science solution for Gujarati check Subject Chapters Wise::

What is pyrotechnics ?

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જવાબ : Pyrotechnics is the science of fireworks.


Why is the household match a special pyrotechnic device ?

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જવાબ : The household match is a special pyrotechnic device because all the pyrotechnics effects - heat, smoke, light, gas and sound are present in it.


Which is the basic material used in fireworks?

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જવાબ : The basic material used in fireworks is black powder.


What does Shukranti contain ?

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જવાબ : Shukranti has references to weapons similar to guns and projectile weapons.


Who developed black powder? When?

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જવાબ : The Chinese developed black powder more than one thousand years ago.


Who revealed the formula for black powder? When?

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જવાબ : Roger Bacon, an English monk, revealed the formula for black powder in 1242.


Why did Roger Bacon write about black powder in code language?

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જવાબ : Roger Bacon wrote about black powder in code language because he considered it a very dangerous substance.


How is Incandescence light produced?

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જવાબ : Incandescent light is produced when a substance is heated so much that it begins to glow.


Why is the temperature of a firework controlled?

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જવાબ : The temperature of a firework is controlled so that the glow of its metallic substances can be manipulated to be a desired color at the proper time.


From which country were fireworks imported?

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જવાબ : Fireworks were imported from China.


Who started manufacturing fireworks in India?

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જવાબ : The safety match producers of Sivakasi in Tamil Nadu began manufacturing fireworks in India.


Why do fire accidents take place in Sivakasi?

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જવાબ : Fire accidents take place in Sivakasi because there are hardly any safety measures in force there and there are very few testing facilities for quality or uniformity.


Why are only a few reliable persons taught the art of manufacturing fireworks ?

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જવાબ : Only a few reliable persons are taught the art of manufacturing fireworks because it is not considered safe to give everybody the details.


What care should be taken to store and unpack fireworks?

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જવાબ : Fireworks should never be stored or unpacked near a flame, gas cylinder or heater.


What kind of clothes should we not wear while lighting fireworks?

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જવાબ : While lighting fireworks, we should not wear long, loose or nylon clothes.


What care should we take while lighting fireworks?

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જવાબ : Fireworks should never be lit inside a house and we should never bend over a firework when we are lighting it.


What is the science of fireworks called?

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જવાબ : The science of fireworks is called ‘pyrotechnics’.


Which two words form the word ‘pyrotechnics’?

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જવાબ : The two words ‘pyr’ and ‘technics’ form the word ‘pyrotechnics’.


Why is the household match considered a special pyrotechnic?

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જવાબ : The household match is considered a special pyrotechnic device because the pyrotechnic effects- heat, smoke, light; gas and sound are present in it.


When did Roger Bacon reveal the formula of black powder?

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જવાબ : Roger Bacon revealed the formula of black powder in 1242.


Why did Roger Bacon write the formula in a code language?

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જવાબ : Roger Bacon wrote of it in a code language because he considered it as a dangerous substance.


Who are called the pioneers of pyrotechnics?

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જવાબ : The Chinese are generally considered the pioneers of pyrotechnics.


Which elements are burning at high temperatures?

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જવાબ : Aluminum, magnesium and titanium are the elements burning at high temperature.


The pyrotechnics is a combination of____________

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જવાબ : The pyrotechnics 1s a combination of potassium nitrate, charcoal and sulphur in the ratio of 75:15:10 by weight.


From where were the fireworks imported before Second World War?

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જવાબ : The fireworks were imported from China before Second World War.


Where is Sivakasi situated?

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જવાબ : Sivakasi is situated in Tamil Nadu.


When did we stop import of fireworks from China?

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જવાબ : We stopped import of fireworks from China during the Second World War.


What did the Chinese developed ?

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જવાબ : The Chinese have developed ‘black powder’ more than one thousand years ago.


What is the formula for black powder?

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જવાબ : The black powder is the blend of potassium nitrate, charcoal and sulphur in the ratio of 75:15: 10. This formula has remained unchanged for centuries.


What do the experts say about the formula of black powder?

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જવાબ : Experts say that black powder might be the only chemical products still using the same age old proportions and manufacturing techniques.


What is the principle behind any firework?

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જવાબ : The principle behind any firework is when heat is applied to fuel it burns using oxygen.


Why is the firework make loud noise?

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જવાબ : The firework make loud noise because the fuel is packed tightly to keep the heat in. The burning takes place all of a sudden which makes loud noise.


Why were the imports from China stopped?

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જવાબ : The imports from China were stopped due to the Second World War.


How much fireworks from Sivakasi were used in the country ?

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જવાબ : 60 to 70 percent of fireworks from Sivakasi were used in the country.


The science of fireworks is called ‘pyrotechnics’.

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જવાબ : True


The household match is a special pyrotechnic device.

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જવાબ : True


‘Black box’ is the basic material used in fireworks.

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જવાબ : False


Indians are the pioneers of pyrotechnics.

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જવાબ : False


Roger Bacon, an English monk, revealed the formula for black powder.

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જવાબ : True


The basic formula for black powder keeps on changing.

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જવાબ : False


Incandescent light is produced when a substance is heated so much that it begins to glow.

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જવાબ : True


In India, fireworks were imported from Japan.

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જવાબ : False


Fireworks are manufactured in Sivakasi.

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જવાબ : True


The greatest danger of pyrotechnics is that it deals with fire.

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જવાબ : True


The greatest danger of pyrotechnics is sound.

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જવાબ : False


We must light fireworks wearing long, loose nylon clothes.

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જવાબ : False


The household match is a special pyrotechnic device.

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જવાબ : True


The formula of gun powder is perfect and need not be changed.

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જવાબ : False


Incandescent light is produced by heating an object till it glow.

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જવાબ : True


On getting a burn due to fireworks, you should first apply oil on it.

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જવાબ : False


Sivakasi 1s the major producer of fireworks in India.

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જવાબ : True


The ancient text describing fireworks is Shukranti.

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જવાબ : False


An American monk revealed the secret of firework.

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જવાબ : False


The country used about 40 Crores worth of firework.

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જવાબ : False


Fireworks should not be stored, handled and bit with care.

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જવાબ : False


The raw materials required are fuel, binders, oxidizers and a few other materials.

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જવાબ : True


Fireworks should never ever be lit inside a house.

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જવાબ : True


The Japanese were the first people to invest fireworks.

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જવાબ : False


An Australian monk revealed the secret of fireworks.

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જવાબ : False


Sivakashi 1s the major producer of fireworks in India.

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જવાબ : True


On getting a burn due to fireworks, you should first apply oil on it.

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જવાબ : False


The household match is a special pyrotechnic device.

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જવાબ : True


The greatest danger of pyrotechnic is sound.

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જવાબ : False


One must light fireworks wearing long, loose and nylon clothes.

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જવાબ : False


Incandescent light is produced by heating an object till it glows.

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જવાબ : True


Short Note: Pyrotechnics

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જવાબ : The science of fireworks is called, ‘pyrotechnics’. It is derived from the Greek word ‘pyr’ meaning fire and ‘technics’ meaning an art. Pyrotechnics includes not only fireworks but also a whole range of devices that use similar materials and principles, from safety matches that we use every day to solid fuel rocket boosters of the space shuttle.

The household match is considered a special pyrotechnic device, as all the pyrotechnics effects -heat, smoke, light, gas and sound-are present in it. The Chinese are considered the pioneers of pyrotechnics. The greatest danger of pyrotechnics is that it deals with fire.


Short Note: Black Powder

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જવાબ : Black powder, also known as gun powder, is the basic material used in fireworks. Some historians say that it was invented in India. Shukranti, written more than two thousand years ago, has references to weapons similar to guns and projectile weapons.

However, the Chinese are said to have developed black powder more than one thousand years ago. In 1242, an English monk, Roger Bacon, revealed the formula for black powder. He considered it such a dangerous substance that he wrote of it in code language. The basic formula of the black powder has remained unchanged for centuries. It is a blend of potassium nitrate, charcoal and sulphur in the ratio of 75:15:10 by weight.


Short Note: Safety Precautions

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જવાબ : Fireworks should be stored, handled and lit with care. They should never be stored or unpacked near a flame, gas cylinder or heater. One should never wear long, loose clothes or nylon clothes when lighting crackers. And since the powder in crackers is poisonous, they should never be carried loose in your pocket or in your hand.

Fireworks should never be lit inside a house. Never bend over a firework when you are lighting it. If you do get a burn, go to a doctor instead of applying oil or ointment.


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