Tag: water
Questions Related to water
Which of the following salt gets hydrolyzed in aqueous solution?
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A salt of weak acid and weak base
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A salt of strong acid and weak base
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A salt of weak acid and strong base
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All of the above
A solution of sodium chloride will:
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turn red litmus blue
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turn blue litmus red
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turn red litmus orange
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not change the colour of either red or blue litmus
Litmus paper can be used as an indicator to know whether a given substance is acidic, basic or neutral in nature.
All salts are:
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strong electrolytes
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weak electrolytes
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non electrolytes
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either weak or strong electrolyte
The loss of water of crystallization to the atmosphere by a compound is termed:
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deliquescence
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dehydration
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efflorescence
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hydrolysis
Efflorescence, spontaneous loss of water by a hydrated salt, which occurs when the aqueous vapor pressure of the hydrate is greater than the partial pressure of the water vapour in the air.
An aqueous solution of a salt of a weak base and a strong acid is acidic, because of:
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electrolysis
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hydrolysis
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dissociation
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none of these
In neutralization reaction weak base reacts with strong acid to give salt of strong acidic solution and water.
Aqueous solution of which of the following salts turns the red litmus blue?
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$Na _2CO _3$
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$NaHCO _3$
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$Na _2CO _3\cdot 10H _2O$
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All of these
Sodium carbonate and sodium bicarbonate are basic salts which turn red litmus blue as they are alkaline in nature having pH more than 7.
A salt is a general name given to the chemical produced during _______ reaction between an acid and a base
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decomposition
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neutralization
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displacement
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double decomposition
A salt is a general name given to the chemical produced during the neutralization reaction between an acid and a base.
Sea water contains about 24g of salts dissolved per litre of it.
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True
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False
Approximately for every litre of seawater there is $35$ $g$ of salt.
Which of the following are efflorescent substances?
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$Cu{SO} _{4}.5{H} _{2}O$
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${Na} _{2}{CO} _{3}.10{H} _{2}O$
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${K} _{2}{SO} _{4}.{Al} _{2}{({SO} _{4})} _{3}.24{H} _{2}O$
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${({NH} _{4})} _{2}{SO} _{4}$
An efflorescent substance is a chemical which has water associated with its molecules, and which, when exposed to air, loses this water through evaporation. An example of an efflorescent substance is the common copper(II) sulfate crystal $(CuSO _4.5H _2O)$, a blue crystalline solid that when exposed to air, slowly loses water of crystallization from its surface to crystallize to form a white layer of anhydrous copper(II) sulfate.
Which of the following is deliquescent?
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$ZnCl _2$
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$Hg _2Cl _2$
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$HgCl _2$
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$CdCl _2$
$(A)$ $ZnCl _{2}$