Industrial Chemistry — Set 4
Chemistry · औद्योगिक रसायन · Questions 31–40 of 40
Which metal is used in the 'Galvanic cell' as the standard reference electrode?
Correct Answer: C. Platinum
• **Platinum** = Platinum is used in the Standard Hydrogen Electrode because it is chemically inert. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Gold; B: Silver; D: Copper
Which chemical is used as an 'antacid' to relieve stomach acidity?
Correct Answer: C. Magnesium hydroxide
• **Magnesium hydroxide** = Magnesium hydroxide, often called 'Milk of Magnesia', is a mild base. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Calcium chloride; B: Sodium hydroxide; D: Potassium nitrate
What is the chemical name of 'Baking Soda'?
Correct Answer: A. Sodium bicarbonate
• **Sodium bicarbonate** = Sodium bicarbonate releases carbon dioxide gas when it reacts with heat or acid. • (Contextual detail from explanation) • 💡 Wrong-option analysis: B: Sodium hydroxide; C: Sodium carbonate; D: Calcium carbonate
Which gas is used in fire extinguishers to displace oxygen and put out fires?
Correct Answer: C. Carbon dioxide
• **Carbon dioxide** = Carbon dioxide is heavier than air and creates a blanket over the fire. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Nitrogen; B: Helium; D: Argon
Which metal is found in 'Chlorophyll', the green pigment of plants?
Correct Answer: D. Magnesium
• **Magnesium** = Magnesium is the central atom in the complex structure of the chlorophyll molecule. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Copper; B: Iron; C: Manganese
Which of the following is the main constituent of 'Glass'?
Correct Answer: A. Silica
• **Silica** = Silica, or silicon dioxide, is the primary raw material obtained from sand. • (Contextual detail from explanation) • 💡 Wrong-option analysis: B: Sodium chloride; C: Potassium nitrate; D: Calcium carbonate
Which alloy is used for making the heating element of electric irons?
Correct Answer: B. Nichrome
• **Nichrome** = Nichrome is an alloy of nickel and chromium with high electrical resistance. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Brass; C: Bronze; D: Solder
Which gas is used in electric bulbs to prevent the oxidation of the filament?
Correct Answer: A. Argon
• **Argon** = Argon is an inert gas that does not react with the hot filament. • (Contextual detail from explanation) • 💡 Wrong-option analysis: B: Oxygen; C: Hydrogen; D: Chlorine
Which chemical is commonly known as 'Common Salt'?
Correct Answer: C. Sodium chloride
• **Sodium chloride** = Sodium chloride is the essential mineral used in cooking and food preservation. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Calcium chloride; B: Potassium chloride; D: Magnesium chloride
The Haber process is used for the industrial production of?
Correct Answer: B. Ammonia
• **Ammonia** = The correct answer is Ammonia. • **200** — The Haber process combines nitrogen and hydrogen at high temperature (450°C) ... • 💡 Wrong-option analysis: A: Sulphuric acid; C: Hydrochloric acid; D: Nitric acid