Synthetic detergents have advantage over soaps because:
A. They work well in hard water
B. They are natural products
C. They are biodegradable
D. They are cheaper
Answer: Option A
Solution (By JKSSB Mock Tests)
Detergents do not form scum with Ca²⁺/Mg²⁺, so they clean effectively in hard water. Soaps form insoluble precipitates. Biodegradability varies; some detergents are non-biodegradable.
Explanation:
Graphite conducts electricity due to delocalized electrons in its structure and is chemically inert, allowing its use in electrodes for electrolysis and batteries. Diamond is an insulator. Hardness is not the reason; graphite is soft. It is opaque and black. Graphite electrodes are used in arc furnaces.
Explanation:
Germanium (Ge) is a metalloid, exhibiting properties of both metals and non-metals. It is a semiconductor used in transistors. Sodium and aluminium are metals. Chlorine is a non-metal. Metalloids are located along the zigzag line in the p-block.
Explanation:
Caustic soda is NaOH (sodium hydroxide). It is a strong base used in soap, paper, and textile industries. Washing soda is Na₂CO₃, baking soda NaHCO₃. Caustic potash is KOH.
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