Question : Yellow spots on citrus leaves is due to deficiency of:
Option 1: Zinc
Option 2: Magnesium
Option 3: Boron
Option 4: Iron
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Correct Answer: Magnesium
Solution : The correct option is magnesium.
Yellow spots on citrus leaves are caused by a lack of magnesium. Magnesium is important for the health of the plant. When a citrus tree doesn't get enough magnesium, its leaves can turn yellow. This can be fixed by giving the plant the right nutrients, often through special fertilizers.
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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
Question : Magnalium is an alloy of
Option 1: Aluminium and Mangnesium
Option 2: magnesium and Tin
Option 3: Aluminium and Zinc
Option 4: Manganese and Magnesium
Question : Philosopher's wool is chemically
Option 1: Aluminium oxide
Option 2: Magnesium oxide
Option 3: Zinc oxide
Option 4: Calcium oxide
Question : An electric iron has a heating element made of :
Option 1: Copper
Option 2: Tungsten
Option 3: Nichrome
Option 4: Zinc
Question : Bailadila range of hills is famous for which of the following minerals?
Option 1: Iron ore
Option 2: Zinc
Option 3: Bauxite
Option 4: Manganese
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