Sawaal
2
Q:

Methane contributes towards global warming so it is called a _________________ gas.

 

A) poisonous B) carcinogenic
C) infectious D) greenhouse

Answer:   D) greenhouse



Explanation:
Subject: Chemistry
Exam Prep: Bank Exams
Related Questions
Q:

A bond formed by the transfer of electrons between atoms of the elements is called

A) Ionic bond B) Covalent bond
C) Co-ordinate bond D) Hydrogen bond
 
Answer & Explanation Answer: A) Ionic bond

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

5 3583
Q:

The difference between a nuclear reactor and atomic bomb is that ___________

A) no chain reaction takes place in nuclear reactor while in the atomic bomb there is a chain reaction B) the chain reaction in nuclear reactor is controlled
C) the chain reaction in nuclear reactor is not controlled D) no-chain reaction takes place in atomic bomb while it takes place in nuclear reactor
 
Answer & Explanation Answer: B) the chain reaction in nuclear reactor is controlled

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

25 9735
Q:

Wavelength of which of the following colours of the visible spectrum of light are maximally  absorbed by green plants________

A) Green and Yellow B) Red and Blue
C) Green and Red D) Blue and Yellow
 
Answer & Explanation Answer: B) Red and Blue

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

1 3358
Q:

A mixture of sand and naphthalene can be seperated by __________

A) Fractional distillation B) Sublimation
C) Chromatography D) Any of them
 
Answer & Explanation Answer: B) Sublimation

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

3 3437
Q:

In addition to nitric acid, another acid which may render iron passive is 

A) acetic acid B) oxalic acid
C) chromic acid D) citric acid
 
Answer & Explanation Answer: C) chromic acid

Explanation:

Passivity of iron is due to formation of an extremely thin and impervious film of ferrosoferric oxide Fe3O4on the surface of iron. Chromic acid, being a powerful oxidising agent (like nitric acid ) renders iron passive. 

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

2 3765
Q:

Which of the following is used to preserve specimens in the biology laboratory?

A) Phenol B) Benzaldehyde
C) Formaldehyde D) Acetic acid
 
Answer & Explanation Answer: C) Formaldehyde

Explanation:

A 40% solution of Formaldehyde known as Formalin is used in the preservation of biological specimens because of its hardening action on proteins. 

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

3 3082
Q:

PAS  is a drug used in the treatment of 

A) tuberculosis B) Cancer
C) typhoid D) malaria
 
Answer & Explanation Answer: A) tuberculosis

Explanation:

Para-amino salicyclic acid (PAS) is used in the treatment of Tuberculosis.

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

0 2378
Q:

Heated saw dust catches fire when a drop of concentrated nitric acid is added to it. This is due to

A) dehydration B) oxidation
C) reduction D) dehydrogenation
 
Answer & Explanation Answer: B) oxidation

Explanation:

Saw dust contains carbon which is oxidised to carbon  dioxide by concentrated nitric acid;

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

30 9950