JEE Chemistry - MCQ Practice Questions

In the extraction of iron from haematite using blast furnace, carbon monoxide acts as:

The standard electrode potential for Zn²⁺/Zn is -0.76 V. In a galvanic cell combining Zn and Cu electrodes, Zn will act as:

The primary use of zinc in brass alloy is to:

Which of the following noble gases has the lowest ionization energy?

The coordination number of Co in [Co(NH₃)₆]³⁺ complex is:

In the extraction of iron from haematite using blast furnace, the reducing agent is primarily:

The hybridization of sulphur in SF₆ molecule is:

The aqueous solution of which salt is most acidic due to hydrolysis?

In the contact process for H₂SO₄ manufacture, the catalyst used is:

The oxidation state of bromine in KBrO₄ is:

Which element shows variable oxidation states primarily due to incomplete d-orbitals?

In the preparation of oxygen by thermal decomposition of KClO₃, the catalyst used is:

In the extraction of iron from its ore using a blast furnace, the temperature at the bottom of the furnace reaches approximately 1900°C. At this temperature, which compound primarily acts as the reducing agent?