Questions

Q:

Which metal pollute the air of a big city?

A) Chromium B) Lead
C) Copper D) Zinc
 
Answer & Explanation Answer: B) Lead

Explanation:
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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:

Improve the bracketed part of the sentence.

 

What time are we (going to leave) tomorrow?

A) going to go to leave B) going to be leaving
C) going to have left D) no improvement
 
Answer & Explanation Answer: D) no improvement

Explanation:
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Q:

The computer that process both analog and digital is called

A) Hybrid computer B) Mainframe computer
C) Digital computer D) Analog computer
 
Answer & Explanation Answer: A) Hybrid computer

Explanation:

The computer that process both analog and digital is called Hybrid computer.

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Q:

Velocitation is the tendency to

A) be traveling at a speed that is faster than perceived B) be traveling at a speed that is slower than perceived
C) Both A & B D) None of the above
 
Answer & Explanation Answer: A) be traveling at a speed that is faster than perceived

Explanation:

Velocitation is a phenomenon caused by driving for long periods at high speeds. A driver may experience velocitation when coming off of the highway; the change in speed makes him or her think that the car is going much slower than it actually is.

 

Velocitation is the tendency to be traveling at a speed that is faster than perceived.

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Q:

What has One Eye Yet cannot See?

A) One-eyed Jack B) A Needle
C) Blind Justice D) Hurricane eye
 
Answer & Explanation Answer: B) A Needle

Explanation:

What has one eye yet cannot see is An Eye of a Needle.

 

A needle has an eye through which we thread it but it is not for seeing.

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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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Q:

Bootstrapping is also known as

A) hot boot B) cold-hot boot
C) cold boot D) quick boot
 
Answer & Explanation Answer: C) cold boot

Explanation:

Bootstrapping is a term used in business to refer to the process of using only existing resources, such as personal savings, personal computing equipment, and garage space, to start and grow a company.

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