Why do calcium ions make water hard but sodium ions do not
Options
(a) Calcium forms insoluble compounds with stearate ions present in soap (b) Sodium forms insoluble compounds with stearate ions present […]
Which is insoluble in water
Options
(a) Sodium carbonate (b) Sodium bicarbonate (c) Calcium carbonate (d) Calcium bicarbonate
Correct Answer:
Calcium carbonate
Explanation:
No explanation available. Be the first to write the explanation […]
Washing soda has the formula
Options
(a) Na₂CO₃.7H₂O (b) Na₂CO₃.10H₂O (c) Na₂CO₃.H₂O (d) Na₂CO₃
Correct Answer:
Na₂CO₃
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
Na₂CO₃ is manufactured by solvay process, the products that are recycled are
Options
(a) CO₂ and NH₄Cl (b) CO₂ and NH₃ (c) NaCl and CaO (d) CaCl₂and CaO
Correct Answer:
CO₂ and NH₃
Explanation: […]
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:
Main Active Ingredients for the commercial products called Bleaching Powder, chlorine powder (or) chlorinated […]
Due to reference in biological role, Ca²⁺ ions are important in
Options
(a) Defence mechanism (b) Triggering the contraction of muscles (c) Formation of ATP (d) Generating right electrical potential across cell membrane
Which of the following compound react with NaHCO3 solution to give sodium salt and carbon dioxide
Options
(a) Phenol (b) Acetic acid (c) n-hexanol (d) Nitric acid
Correct Answer:
Acetic acid
Explanation:
CH₃COOH(Acetic […]
Calcium is obtained by the
Options
(a) electrolysis of solution of calcium chloride in water (b) electrolysis of molten anhydrous calcium chloride (c) roasting of limestone (d) reduction of calcium chloride with carbon
Identify the feasible reaction among the following
Options
(a) K₂CO₃ →K₂O + CO₂ (b) Na₂CO₃ → Na₂O + CO₂ (c) Li₂CO₃ → Li₂O + CO₂ (d) Rb₂CO₃ → Rb₂O+ CO₂
Correct Answer:
Li₂CO₃ […]
Which of the following does not decompose on heating
Options
(a) MgCO₃ (b) Na₂CO₃ (c) Li₂CO₃ (d) Ca(HCO₃)₂
Correct Answer:
Na₂CO₃
Explanation:
No explanation available. Be the first to write the explanation for […]
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