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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8 8118
Q:

Arena is the special name for playground of

A) Wrestling B) Football
C) Skating D) Tennis
 
Answer & Explanation Answer: A) Wrestling

Explanation:

Arena_is_the_special_name_for_playground_of1557731486.jpg image

 

Arena is the special name for playground of Wrestling.

 

 

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11 8115
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:

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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4 8105
Q:

The Machkund project is a joint project of which two states?

 

A) West Bengal and Odisha   B) West Bengal and Bihar  
C) Odisha and Andhra Pradesh   D) Karnataka and Andhra Pradesh  
 
Answer & Explanation Answer: C) Odisha and Andhra Pradesh  

Explanation:
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Q:

Dronacharya Award Is Given To

A) Sports Editors B) Umpires
C) Sportsmen D) Coaches
 
Answer & Explanation Answer: D) Coaches

Explanation:

The Dronacharya Award, formally known as Dronacharya Award for Outstanding Coaches in Sports and Games, is sports training honour of the Republic of India. The award is named after Drona, often referred as "Dronacharya" or "Guru Drona", a character from the Sanskrit epic Mahabharata of ancient India.

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15 8099
Q:

Which of the following was not a purpose for building Farakka Barrage?

 

A) Checking water flowing into Bangladesh B) Checking silting of Kolkata Port
C) Preventing erosion of Kolkata Port D) Facilitating navigation in Ganga river
 
Answer & Explanation Answer: D) Facilitating navigation in Ganga river

Explanation:
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