1 Answer

Answer :

Co2 dilutes lime water

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Last Answer : (A) Alum (aluminium sulphate)

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Last Answer : (B) Ferric sulphate

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Last Answer : ANS: C

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Last Answer : Ans. Due to formation of colloidal sol of Sulphur. 

Description : Pick up the correct statement from the following: (A) The lime in excess makes the cement unsound and causes the cement to expand and disintegrate (B) The silica in excess makes the cement stronger ... time also increases (C) The excess amount of alumina weakens the cement (D) All the above

Last Answer : Answer: Option D

Description : Excess lime when added (a) Makes the cement unsound (b) Causes the cement to expand and disintegrate (c) Lowering the clinkering temp of cement (d) Both ‘a’ and ‘b’

Last Answer : (d) Both ‘a’ and ‘b’

Description : Which of them liberate a gas which turns lime water milky .

Last Answer : Which of them liberate a gas which turns lime water milky . A. B. `{:(CH_(3)-CH-COOH),(" |"),(" "COOH ... ))_(5)-COOH overset(Ca(OH)_(2)//Delta)to` D.

Description : Which of them liberate a gas which turns lime water milky .

Last Answer : Which of them liberate a gas which turns lime water milky . A. B. `{:(CH_(3)-CH-COOH),(" |"),(" "COOH ... ))_(5)-COOH overset(Ca(OH)_(2)//Delta)to` D.

Description : A gas turns lime water milky and acidified `K_(2)Cr_(2)O_(7)` solution green then gas is :

Last Answer : A gas turns lime water milky and acidified `K_(2)Cr_(2)O_(7)` solution green then gas is : A. `HCl` B. `H_(2)S` C. `SO_(2)` D. `CO_(2)`

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Last Answer : This gas is carbon dioxide.

Description : Which gas turns lime water milky?

Last Answer : Carbondioxide

Description : Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for removal the hardness of water and a gas C is evolved. The gas C when passed through lime water ,turns it ... © A is baking soda ,B is washing soda and C is carbon dioxide (d) both a and c

Last Answer : (d) both a and c

Description : What happens when excess of carbon dioxide gas is passed through lime water? (a) Lime water first turns milky and then colorless (b) Lime water turns bluish me water turns milky (d) Lime water turns blackish

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Description : Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by (A) Biological oxygen pond (B) Radial settling tank (thickener) using coagulant (lime & ferrous sulphate) (C) Lagoons (D) Filtration

Last Answer : (B) Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)

Description : A student dropped few pieces of marble in dilute hydrochloric acid contained in a test tube. The evolved gas was then passed through lime water. What change would be observed in lime water? Write balanced chemical equation for both the change observed?

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Description : When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is - (1) Hydrogen (2) Oxygen (3) Carbon dioxide (4) All of them

Last Answer : (3) Carbon dioxide Explanation: When baking soda and lemon juice are added together, the reaction of the two is an acid-based reaction because it involves an acid (citric acid in the lemon juice) ... , more commonly known as baking soda). Carbon dioxide, a gas, is produced by the reaction.

Description : The gas let out when the: lime stone is heated?

Last Answer : Carbon dioxide

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Last Answer : (B) Quick lime

Description : When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is (1) Hydrogen (2) Oxygen (3) Carbon dioxide (4) All of them 

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