Which of the following statements is correct
Which of the following statements is correct
Options
(a) All halogens except fluorine form oxy acid (b) All halogens form oxy acid (c) Only chlorine and bromine form oxy acid (d) Only iodine […]
Questions
Chlorine acts as bleaching agent only in the presence of
Chlorine acts as bleaching agent only in the presence of
Options
(a) sunlight (b) moisture (c) dry air (d) pure oxygen
Correct Answer:
moisture
Explanation:
In presence of moisture, chlorine acts as oxidising agent […]
Which of the following is low boiling liquid
Which of the following is low boiling liquid
Options
(a) HF (b) HCl (c) HBr (d) HI
Correct Answer:
HF
Explanation:
No explanation available. Be the first to write the explanation for this […]
In which of the following compounds, nitrogen exhibits highest oxidation state
In which of the following compounds, nitrogen exhibits highest oxidation state
Options
(a) N₂H₄ (b) NH₃ (c) N₃H (d) NH₂OH
Correct Answer:
N₃H
Explanation:
N₂H₄ ⇒ 2x + 4 (+1) = 0 ⇒ […]
Repeated use of which one of the following fertilizers would increase the
Repeated use of which one of the following fertilizers would increase the acidity of the soil
Options
(a) Ammonium sulphate (b) Superphosphate of lime (c) Urea (d) Potassium nitrate
Correct Answer:
Ammonium sulphate
Explanation: […]
Aluminium is obtained by
Aluminium is obtained by
Options
(a) reducing Al₂O₃ with coke (b) electrolysing Al₂O₃ dissolved in Na₃AlF₆ (c) reducing Al₂O₃ with chromium (d) heating Al₂O₃ and cryolite
Correct Answer:
electrolysing Al₂O₃ dissolved in […]
Which of the following is an ore of aluminium
Which of the following is an ore of aluminium
Options
(a) Dolomite (b) Azurite (c) Bauxite (d) Malachite
Correct Answer:
Bauxite
Explanation:
No explanation available. Be the first to write the explanation for […]
In the extraction of aluminium from bauxite, cryolite is used to
In the extraction of aluminium from bauxite, cryolite is used to
Options
(a) decreases the boiling point of aluminium (b) purify the bauxite (c) make the mass lighter (d) decreases melting point of […]
Galena is an ore of
Galena is an ore of
Options
(a) Pb (b) Sn (c) Hg (d) Zn
Correct Answer:
Pb
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
When the ore limestone is heated carbon dioxide is given off. This operation
When the ore limestone is heated carbon dioxide is given off. This operation in metallurgy is known as
Options
(a) smelting (b) ore dressing (c) calcination (d) roasting
Correct Answer:
calcination
Explanation:
CaCO₃(s) → […]