Why do calcium ions make water hard but sodium ions do not
Why do calcium ions make water hard but sodium ions do not Options (a) Calcium forms insoluble compounds with stearate…
7 years ago
S and Some P Block Elements
Which is insoluble in water
Which is insoluble in water Options (a) Sodium carbonate (b) Sodium bicarbonate (c) Calcium carbonate (d) Calcium bicarbonate Correct Answer:…
7 years ago
Washing soda has the formula
Washing soda has the formula Options (a) Na₂CO₃.7H₂O (b) Na₂CO₃.10H₂O (c) Na₂CO₃.H₂O (d) Na₂CO₃ Correct Answer: Na₂CO₃Explanation:No explanation available. Be…
7 years ago
Na₂CO₃ is manufactured by solvay process, the products that are recycled are
Na₂CO₃ is manufactured by solvay process, the products that are recycled are Options (a) CO₂ and NH₄Cl (b) CO₂ and…
7 years ago
What is the formula of bleaching powder
What is the formula of bleaching powder Options (a) CaO(OCl) (b) Ca(OCl)Cl (c) Ca(OCl)₂ (d) Ca(OCl)₂Cl Correct Answer: Ca(OCl)Cl Explanation:…
7 years ago
Due to reference in biological role, Ca²⁺ ions are important in
Due to reference in biological role, Ca²⁺ ions are important in Options (a) Defence mechanism (b) Triggering the contraction of…
7 years ago
Which of the following compound react with NaHCO3 solution to give sodium salt
Which of the following compound react with NaHCO3 solution to give sodium salt and carbon dioxide Options (a) Phenol (b)…
7 years ago
Calcium is obtained by the
Calcium is obtained by the Options (a) electrolysis of solution of calcium chloride in water (b) electrolysis of molten anhydrous…
7 years ago
Identify the feasible reaction among the following
Identify the feasible reaction among the following Options (a) K₂CO₃ →K₂O + CO₂ (b) Na₂CO₃ → Na₂O + CO₂ (c)…
7 years ago
Which of the following does not decompose on heating
Which of the following does not decompose on heating Options (a) MgCO₃ (b) Na₂CO₃ (c) Li₂CO₃ (d) Ca(HCO₃)₂ Correct Answer:…
7 years ago