Question
The following sketch represents the electroplating of an Iron cup with Nickel metal
The following sketch represents the electroplating of an Iron cup with Nickel metal. Study the diagram and answer the following questions: (a)…
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Question
A mineral from which a metal can be extracted economically is called
A mineral from which a metal can be extracted economically is called: (a) Matrix (b) Ore (c) Flux (d) Alloy
Question
In a water molecule, the oxygen atom has
In a water molecule, the oxygen atom has: (a) One shared pair of electrons (b) Three shared pairs of electrons (c) Two…
Question
Which of the following occupies 22.4 L at STP? (1) 32 g of O₂ (2) 2 mol of H₂ (3) 6.022 × 10²³ molecules of NH₃
Which of the following occupies 22.4 L at STP? (1) 32 g of O₂ (2) 2 mol of H₂ (3) 6.022 ×…
Question
Ammonia is collected by downward displacement of air because it is
Ammonia gas is collected by downward displacement of air since ammonia is: (a) Very slightly soluble in water (b) Heavier than air…
Question
The rotten-egg smell is due to
Rotten egg smell is due to the liberation of: (a) HCl gas (b) H₂S gas (c) Cl₂ gas (d) SO₂ gas
Question
When ammonia is passed over heated copper(II) oxide, a reddish-brown residue is obtained. This shows the
On passing ammonia gas over heated copper oxide for some time, a reddish-brown residue is left behind. What property of ammonia is…
Question
Which of the following is not a constituent of the electrolytic mixture in the Hall-Heroult process?
Which of the following is not a constituent of the electrolytic mixture in the Hall-Heroult process? (a) Al₂O₃ (b) NaAlO₂ (c) Na₃AlF₆…
Question
Electron affinity is maximum in
Electron affinity is maximum in: (a) Magnesium (b) Argon (c) Lithium (d) Bromine
Question
In the reaction S + 2H₂SO₄ → 3SO₂ + 2H₂O, the oxidising agent is
In the reaction S + 2H₂SO₄ → 3SO₂ + 2H₂O, the oxidising agent is: (a) Sulphur (b) Sulphuric acid (c) Sulphur dioxide…