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प्रश्न
Select the correct options for the following statement:
The gas which has now replaced hydrogen in air balloons is ___.
पर्याय
argon
helium
neon
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उत्तर
The gas which has now replaced hydrogen in air balloons is helium.
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संबंधित प्रश्न
Multiple Choice Question
Hydrogen is responsible for producing
Write the balanced equation and give your observation when the following metal reacts:
Sodium with cold water
Write the balanced equation and give your observation when the following metal reacts:
Magnesium with steam
Choose the correct option:
The composition of the nucleus of deuterium is
Choose terms from the options given in brackets to complete this sentence.
A metal …………….. hydrogen in the activity series gives hydrogen with …………… acid or …………… acid.
(above, below, dilute hydrochloric, concentrated hydrochloric, dilute sulphuric).
Correct the following statement:
Hydrogen is dried by passing it through conc. H2SO4.
Give balanced equation for the following conversion:
Iron [III] oxide to iron – using hydrogen.
Write a correctly balanced equation for the following:
When steam is passed over red hot iron.
Explain the following:
Two jars of H2 are collected – “one burns quietly and the other does not”.
Write balanced equation of the reaction in the preparation of : hydrogen from a solution of potassium hydroxide [other than by electrolysis].
