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351.

What is the pH of pure water?
(a)1
(b)7
(c)5
(d)9
Comment
Answer is: BNA

352.

The pH of fresh ground water slightly decreases upon exposure to air because
(a)Carbon dioxide form air is dissolved in the water
(b)Oxygen from the air is dissolved in the water
(c)The dissolved carbon dioxide of the ground water escapes into the air
(d)The dissolved oxygen of the ground water escapes into the air
Comment
Answer is: ANA

353.

Which one of the following reducing agent can also act as an oxidising agent?
(a)H2
(b)H2S
(c)SO2
(d)HCL
Comment
Answer is: CNA

354.

The conversion of Fe2+ to Fe3+ is
(a)Oxidation
(b)Reduction
(c)Ionisation
(d)Nuclear reaction
Comment
Answer is: ANA

355.

If a solution of pH=6 is diluted by 100 times the resulting solution would be
(a)Neutral
(b)Basic
(c)Buffer
(d)Acidic
Comment
Answer is: BNA

356.

Which one of the following statements is correct?
(a)All bases are alkali
(b)None of the bases is alkali
(c)There are no more bases except alkali
(d)All alkalies are bases but all bases are not alkalies
Comment
Answer is: DNA

357.

The pH of water at 25oC is 7. When it is heated to 100oC, pH of water
(a)Increases
(b)Decreases
(c)Remains same
(d)Decreases up to 50oC and then increases
Comment
Answer is: BNA

358.

The acid used in lead storage battery is
(a)Oxalic acid
(b)HNO3
(c)H2SO4
(d)HCl
Comment
Answer is: CNA

359.

Which one of the following salts when dissolved in water makes the solution basic?
(a)Sodium chloride
(b)Copper sulphate
(c)Ferric chloride
(d)Sodium acetate
Comment
Answer is: DNA

360.

Solution in test tubes containing H2O and aqueous NaOH can be differentiated with the help of
(a)Red litmus
(b)Blue litmus
(c)Na2CO3
(d)HCl
Comment
Answer is: ANA

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