Sawaal

 Chemistry Questions

Popular Latest Rated
Q:

Which statement(s) is/are CORRECT regarding Dalton’s Atomic theory?

 

I. All matters are made of very tiny particles.

II. Atoms of different elements have different masses and chemical properties.

III. The relative number of atoms is variable in any compound.

 

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

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 27363
Q:

What is the general formula of alkenes?

 

A) CnH2n B) CnH2n+2
C) CnH2n-2 D) CnH2n-1
 
Answer & Explanation Answer: A) CnH2n

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

2 27278
Q:

By volume, 21% of air is _______________.

 

A) hydrogen B) oxygen
C) nitrogen D) carbon dioxide
 
Answer & Explanation Answer: B) oxygen

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 26966
Q:

Which of the following solutions is alkaline?

 

A) H+ <1 × 10-7 Mol/l B) H+ = 1 × 10-4 Mol/l
C) H+ = 1 × 10-7 Mol/l D) H+ > 1 × 10-7 Mol/l
 
Answer & Explanation Answer: A) H+ <1 × 10-7 Mol/l

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

2 26937
Q:

Which of the following group does NOT follow Newlands Law of Octaves?

 

A) Li, Na B) Be, Mg  
C) C, Si   D) Mn, Hg
 
Answer & Explanation Answer: D) Mn, Hg

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 26309
Q:

_______contributes towards global warming so it is called a greenhouse gas.

 

A) Oxygen B) Nitrogen
C) Hydrogen D) Methane
 
Answer & Explanation Answer: D) Methane

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams

3 26270
Q:

Is C2 Paramagnetic or Diamagnetic?

A) Paramagnetic B) Diamagnetic
C) Ferromagnetic D) Can't be determined
 
Answer & Explanation Answer: B) Diamagnetic

Explanation:

Paramagnetic Molecules ::

 

If the Electronic configuration of a molecule has any unpaired electrons, then that molecule is said to be Paramagnetic.

 

Diamagnetic Molecules ::

 

If the Electronic configuration of a molecule has only paired or spin paired electrons, then that molecule is said to be Diamagnetic.

 

Is_C2_Paramagnetic_or_Diamagnetic1556263140.jpg image 

 

Here the molecule C2 has all paired electrons in its electronic configuration. So C2 is Diamagnetic.

 

Whereas, B2 molecule has unpaired electrons. So B2 is Paramegnetic.

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: CAT , Bank Exams , AIEEE
Job Role: Bank PO , Bank Clerk , Analyst

32 26077
Q:

Mass number is always equal to ______.

 

A) number of protons B) number of neutrons
C) sum of number of protons and number of electrons D) sum of number of protons and number of neutrons
 
Answer & Explanation Answer: D) sum of number of protons and number of neutrons

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 25686