12 Questions
What is the atomic number of hydrogen?
1
How does hydrogen react with metal oxides?
Forms metal and water
What is the main product when sulphuric acid reacts with zinc in a laboratory?
Hydrogen gas
Which gas is produced when hydrogen reacts with chlorine?
Hydrogen chloride gas
What sound is heard when hydrogen burns with oxygen?
"Pop" sound
In terms of reactivity, which metal gives hydrogen with water?
Sodium
Which statement regarding hydrogen is true?
Hydrogen can be collected by downward displacement of air.
What causes the pop sound when hydrogen is burnt?
Impurities in the hydrogen gas
Why is nitric acid not used for the preparation of hydrogen gas?
Nitric acid oxidizes hydrogen to form water.
Which of the following is a correct balanced chemical equation for the reaction of zinc with hydrochloric acid?
Zn + 2HCl ⟶ ZnCl2 + H2
Which metal liberates hydrogen only when steam is passed over red hot metal?
Iron
Why has helium replaced hydrogen in weather observation balloons?
A small leakage of hydrogen can cause an explosion when mixed with air.
Test your knowledge on Chapter 7 - Hydrogen from Class 8 Chemistry with Selina solutions. Enhance your understanding of the periodic table's first element, Hydrogen, known for being the lightest element. Explore comprehensive study materials and expertly-prepared solutions from BYJU’S.
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