2
Q:

If people sleep in closed rooms where charcoal fire is burning , they die due to 

A) carbon monoxide B) carbon dioxide
C) methane D) phosgene

Answer:   A) carbon monoxide



Explanation:

A closed room is aplace where charcoal is burnt in limited supply of air. There is every chance for the formation of the deadly poisonous carbon monoxide, which when inhaled, reacts with the iron in haemoglobin of blood and prevents the supply of oxygen. It is said to be treacherous as there can be no previous warning of its presence because it is an odourless and colourless gas.

Subject: Chemistry
Q:

The elements belonging to groups ............ are known as 'd' block elements.

 

A) 3 to 12 B) 1 and 2
C) 13 to 18 D) 3 to 10
 
Answer & Explanation Answer: A) 3 to 12

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 366
Q:

220 g of carbon dioxide contains .......... moles.

 

A) 5 B) 6
C) 3 D) 4
 
Answer & Explanation Answer: A) 5

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 503
Q:

A solution contains 42 g of common salt in 320 g of water. Calculate the concentration in terms of mass by mass percentage of the solution?

 

A) 11.6 g B) 12.6%
C) 11.6% D) 10.36%
 
Answer & Explanation Answer: C) 11.6%

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 219
Q:

............ is a purple-coloured solid halogen.

 

A) Bromine B) Fluorine
C) Chlorine D) Iodine
 
Answer & Explanation Answer: D) Iodine

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 147
Q:

The chemical formula of Ammonium phosphate is ............

 

A) (NH4)3PO4 B) (NH4)2PO4
C) (NH4)2P02 D) NH4PO4
 
Answer & Explanation Answer: A) (NH4)3PO4

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 352
Q:

Which among the following has its refractive index closest to that of crown glass?

 

A) Diamond   B) Ruby  
C) Sapphire   D) Canada balsam  
 
Answer & Explanation Answer: D) Canada balsam  

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams

1 129
Q:

Which among the following is a cation?

 

A) Ammonium   B) Iodide  
C) Chloride   D)
 
Answer & Explanation Answer: A) Ammonium  

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams

1 152
Q:

Which of the following can be used as a catalyst in Hydrogenation reaction?

 

A) Barium B) Iron
C) Tungsten D) Palladium
 
Answer & Explanation Answer: D) Palladium

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 723