carbon and its compounds

which acid is used for the laboratory preparation of carbon monoxide

• hydrochloric acid

• concentrated sulphuric acid

• formic acid

• acetic acid

SODIUM OXIDE + CARBON DIOXIDE-->

a nitrogenous fertilizer obtained by the reaction between carbon dioxide and ammonia is-------

both CO2 and SO2 turns lime water milky

• true

• false

diamond is a crystalline allotrope of carbon built from a hexagonal unit

• true

• false

write a balanced molecular equation of the given word equation

magnesium + carbon dioxide --> magnesium oxide + carbon

• Mg + CO2 --> 2MgO + C

• 2Mg + CO2 --> 2MgO + C

• 2Mg + CO2 --> Mg(OH)2 + 2C

• 2Mg + 2CO2 --> 2MgO + 2C

in the laboratory preparation of carbon monoxide concentrated sulphuric acid is used as

• reducing agent

• oxidising agent

• dehydrating agent

which of the following statement is not true about carbon dioxide gas

• fairly soluble in water

• slightly acidic in nature

• reacts with heated coke to produce carbon monoxide gas

• reacts with calcium hydroxide and produce calcium oxide

amorphous allotrope of carbon which is used as a reducing agent in iron production is------

which of the following statement is true

• diamond is a good conductor of electricity

• graphite is a bad conductor of heat

• in diamond, there is no free electron because each carbon atom is connected to 4 carbon atoms

• in graphite, there is a free-electron because each carbon atom is connected to 4 carbon atoms