Question : The metallic contituents of hard water are:
Option 1: Magnesium calcium and tin
Option 2: Iron ,tin and calcium
Option 3: Calcium ,magnesium and iron
Option 4: Magnesium ,tin and iron
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Correct Answer: Calcium ,magnesium and iron
Solution : Correct Answer is calcium and magnesium ions
Water hardness is caused by calcium and magnesium ions, and the anions are thus chlorides and sulphates. The two most prevalent minerals that make water "hard" are dissolved calcium and magnesium. As the calcium and magnesium level increases, so does the degree of hardness.Calcium hydroxide Ca(OH)2 is the chemical formula for hard water.
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Question : Which of the following industries is its major consumer in India?
Option 1: Iron and steel
Option 2: Aviation
Option 3: Automobile
Option 4: Chemical
Question : Which of the following regions of India has the maximum concentration of iron and steel industries?
Option 1: Western Ghats
Option 2: Deccan Plateau
Option 3: Chhota Nagpur Plateau
Option 4: Indo-Gangetic plains
Question : In which of the following regions in India are there high-grade iron ore deposits?
Option 1: Western Rajasthan
Option 2: Southern Punjab
Option 3: Eastern Uttar Pradesh
Option 4: Northern Odisha
Question : Who among the following is famously called the Iron Lady of India?
Option 1: Mary Kom
Option 2: Deepika Padukone
Option 3: Lata Mangeshkar
Option 4: Indira Gandhi
Question : Which of the following is not a major iron ore belt in India?
Option 1: Maharashtra-Goa belt
Option 2: Haryana-Rajasthan belt
Option 3: Odisha-Jharkhand belt
Option 4: Durg-Bastar-Chandrapur belt
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