Tag: substances, objects and energy

Quizzes (5) Questions (175)

Questions Related to substances, objects and energy

Multiple choice chemistry occurrence of carbon compounds in nature substances, objects and energy alternative fuels and energy sources alternative sources of energy

Methane gas is an organic fuel obtained from the sources mentioned here. Which of the following is not a correct source?

  1. Coal gas

  2. Molasses

  3. Natural gas

  4. Sewage
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Molasses is a factory waste from sugar industry. It does not contain any traces of methane. So, methane is not obtained from molasses.

Multiple choice chemistry occurrence of carbon compounds in nature substances, objects and energy alternative fuels and energy sources alternative sources of energy

How wars and attacks can act as reason for energy crisis?

  1. Wars between countries can also hamper supply of energy specially if it happens in Middle East countries like Saudi Arabia, Iraq, Iran, Kuwait, UAE or Qatar

  2. It will attract MNCs to invest int those countries

  3. It will cause the death of people

  4. It will decrease the price of fossil fuels
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Wars between countries can also hamper supply of energy specially if it happens in Middle East countries like Saudi Arabia, Iraq, Iran, Kuwait, UAE or Qatar. Thats what happened during 1990 Gulf war when price of oil reached its peak causing global shortages and created major problem for energy consumers.

Multiple choice chemistry occurrence of carbon compounds in nature substances, objects and energy alternative fuels and energy sources alternative sources of energy

Which of the following is not true about Biogas? 

  1. It contains methane

  2. Burns without smoke

  3. Leaves ash behind

  4. Produced by anaerobic decomposition of animal and plant waste
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Higher the methane content, higher the calorific value. Pure $CH _4$ has a Gross Calorific Value of 39.8 $MJ/m^3$. the rate of combustion of biogas is quite high as it is produced by anaerobic decomposition of animal and plant waste.
It does not leave any ash behind after burning as cow dung and other organic matter is used in the preparation of biogas.