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Select the correct answer from the choic...

Select the correct answer from the choice in bracket to complete each sentence:
The product formed on combustion of hydrogen in air is ___________[water gas, water, producer gas].

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Select the correct answer from the choice in bracket to complete each sentence: The gas which has now replaced hydrogen in air balloons is _____________[argon, helium, neon].

Select the correct answer from the choice in bracket to complete each sentence: An example of a monoatomic molecule is _______ [hydrogen/helium).

Select the correct answer from the choice in bracket to complete each sentence: The reactive element from the two monoatomic elements is _______ [neon/silicon].

Select the correct answer from the choice in bracket to complete each sentence: In Bosch process the catalytic reduction of steam to hydrogen is carried out by __________[ CO_(2)CO,C] .

The only product of combustion of hydrogen in air is water. ( T/F)

Select the correct answer from the choice in bracket to complete each sentence: A foul smelling gas formed when hydrogen reacts with a molten non-metal, is _______[hydrogen chloride, hydrogen sulpide, ammonia].

Select the correct answer from the choice in bracket to complete each sentence: Dust in air is an example of________ [heterogeneous/homogeneous) mixture.

Select the correct answer from the choice in bracket to complete each sentence. Matter is added or removed during a - [chemical/physical] change

Select the correct answer from the choice in bracket to complete each sentence:- A- [proton/neutron] is a sub-atomic particle with no charge and unit mass.

Select the correct answer from the choice in bracket to complete each sentence: Compounds are_______ [homogeneous or heterogeneous/always homogeneous) in nature.