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Grade 11,

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11*. A substance (P), when heated in a dry test tube, liberated a colourless odourless gas that rekindled a glowing splinter. P is not : (A) KClO3 (B) NaN3 (C) K2SO3 (D) CaCO3 12.* Sodium carbonate reacts with : (

11*. A substance (P), when heated in a dry test tube, liberated a colourless odourless gas that rekindled a
glowing splinter. P is not :
(A) KClO3 (B) NaN3 (C) K2SO3 (D) CaCO3
12.* Sodium carbonate reacts with :
(

Grade:12

2 Answers

ramteja
108 Points
6 years ago
11*. A substance (P), when heated in a dry test tube, liberated a colourless odourless gas that rekindled a glowing splinter. P is not : (A) KClO3 (B) NaN3 (C) K2SO3 (D) CaCO3 12.* Sodium carbonate reacts with : (A) MgCl2 (aq.) (B) Ca(HCO3 ) 2 (C) H2SO4 (D) dry CO2
ramteja
108 Points
6 years ago
13.* Aqueous solution of boric acid is treated with salicylic acid. Which of the following statements is/are incorrect for the product formed in the above reaction ? (A) no product will be formed because both are acids. (B) product is 4-coordinated complex and optically resolvable. (C) product is 4-coordinated complex and optically non-resolvable. (D) there are two newly formed five membered rings. 14.* NH3 (excess) + Cl2  NH4Cl + A(gas) ; NH3 + Cl2 (excess) 

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