Related Questions

A sooty flame can be made non-luminous by
A Admitting more gas
B Shutting gas supply
C Admitting more air
D Shutting air supply
Sooty and sulphurous smog formed due to combustion of fossil fuels particularly in winter, continues throughout the day and night. When the moist atmospheric air's water vapor condenses on the solid particles of smoke thereby forming smog (smoke + fog), it causes
A Poor visibility due to sky darkening
B Irritation in eyes
C Respiratory trouble
D All of the above
Actual flame temperature is always lower than the adiabatic flame temperature, because there is
A No possibility of obtaining complete combustion at high temperature
B Always loss of heat from the flame
C Both A & B
D Neither A nor B
The maximum adiabatic flame temperature in air is __________ the maximum flame temperature in pure oxygen.
A Lower than
B Higher than
C Same as
D Not related to
The maximum adiabatic flame temperature of fuels in air is __________ the maximum flame temperature in pure oxygen.
A Lower than
B Higher than
C Same as
D Not related to
A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be
A More
B Less
C Same
D Data insufficient; can't be predicted
Ceramic compounds as compared to metallic compounds
A Crystallise faster
B Resist greater tensile stress at room temperature
C Have higher melting temperature
D Are better conductor of electricity at higher temperature
Which of the following are amongst the few carbon-containing compounds not classified as organic?
A Methane
B Nucleic acids
C Cyanides
D Propane
কোন বিক্রিয়ার সাহায্যে জৈব যৌগে কার্বন সংখ্যা বৃদ্ধি করা যায়? (By which reaction the number of carbon can be increased in organic compounds?)
A উটর্জ-ফিটিগ বিক্রিয়া (Wurtz-Fittig reaction)
B হফম্যান বিক্রিয়া (Hofmann recation)
C উটর্জ বিক্রিয়া (Wurtz reaction)
D কোব বিক্রিয়া (Kolbe reaction)
They are organic compounds consisting of carbon, hydrogen and oxygen present in all living organisms.
A Proteins
B Carbohydrates
C Fats
D Minerals

Next steps