Questions

Q:

Which solution has the highest pH?

A) 50.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq) B) 50.0 mL 0.0500 M sodium hydroxide, NaOH (aq)
C) 50.0 mL 0.0500 M nitric acid, HNO3 (aq) D) 50.0 mL 0.0500 M nitrous acid, HNO2 (aq)
 
Answer & Explanation Answer: A) 50.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq)

Explanation:

50.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq) has the highest pH value.

Sodium hydroxide and Calcium hydroxide are strong bases so they completely ionize in solution. Because they ionize at the same rate, and Calcium hydroxide has the higher pH calculated, then Calcium hydroxide, in fact, has the highest pH.

Nitric acid is a strong acid, so it completely ionizes in water. Whilst nitrous acid is a weak acid. Therefore, the nitric acid solution has the LOWEST ph.

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Q:

Match the characteristics with their market structure:

(a) MC = Price
(b) Firm will tend to set output so that it earns maximum profits.

A) (a) Pure Competition, (b) Pure Monopoly B) (a) Pure Monopoly, (b) Monopolistic Competition
C) (a) Oligopoly, (b) Monopolistic Competition D) (a) Pure Competition, (b) Oligopoly
 
Answer & Explanation Answer: A) (a) Pure Competition, (b) Pure Monopoly

Explanation:
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Q:

Select the synonym of

 

to superimpose

 

A) to overlap B) to adjoin
C) to juxtapose D) to continue
 
Answer & Explanation Answer: A) to overlap

Explanation:
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Filed Under: English
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Q:

Which among the following constituents of xylem is/are tubular structure(s)?

 

I. Tracheids

II. Vessels

III. Xylem fibres

 

A) Only I B) Only II
C) Only I and II D) All I, II and III
 
Answer & Explanation Answer: C) Only I and II

Explanation:
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Filed Under: Biology
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Q:

The main element used in the vulcanisation of rubber is

A) nickel B) copper
C) sulphur D) graphite
 
Answer & Explanation Answer: C) sulphur

Explanation:

In vulcanization, cruder rubber is heated with 3% sulphur at about for 1200C for 2-3 hours.

Vulcanised rubber is a vastly improved product.

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Filed Under: Chemistry
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Q:

Correct answer for the given blank out of the four alternatives.


The main failings were of conception and a political willingness to settle _________ easy options. _______________ the expansive declarationsof the need "to maintain effective security of all nuclear materials, _______________ includes nuclear materials used in nuclear weapons”, thesummits narrowed their _______________ to civilian holdings __________________ non­nuclear weapon states.


_______________ includes nuclear materials used in nuclear weapons”

 

A) which B) that
C) those D) who
 
Answer & Explanation Answer: A) which

Explanation:
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Q:

Improve the bracketed part of the sentence.

Do you know (to whom Raj is going to marry)?

 

A) who is raj going to get married B) who Raj will be going to marry
C) whom Raj is going to marry D) no improvement
 
Answer & Explanation Answer: C) whom Raj is going to marry

Explanation:
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Q:

A user reports a PC problem to the Service Desk. A Service Desk representative determines that the PC is defective and indicates that according to the services catalogue, the PC will be replaced within three hours. Which ITIL process is responsible for having this user's PC replaced within three hours? 

A) Availability Management B) Change Management
C) Configuration Management D) Service Level Management
 
Answer & Explanation Answer: B) Change Management

Explanation:
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