Chemistry Questions

Q:

The water molecule has a dipole with the negative portion

A) localized on one of the hydrogens B) localized between the hydrogen atoms
C) pointing toward the oxygen atom D) pointing from the oxygen through the hydrogen atoms
 
Answer & Explanation Answer: C) pointing toward the oxygen atom

Explanation:

The water molecule has a dipole with the negative portion pointing toward the oxygen atom.

Report Error

View Answer Report Error Discuss

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

2 4029
Q:

Which among the following is the most electronegative element?

A) Flourine B) Bromine
C) Iodine D) Oxygen
 
Answer & Explanation Answer: A) Flourine

Explanation:

Flourine is the most electro negative element due to its small atomic radius .It also has the tendency to accept an electron to complete octet configuration

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

4 4019
Q:

IUPAC full form

A) Indian Union of Pure and Applied Chemistry B) International Union of Postal and Application Corporation
C) International Union of Pure and Applied Chemistry D) International University of Poland And Combodia
 
Answer & Explanation Answer: C) International Union of Pure and Applied Chemistry

Explanation:

IUPAC stands for International Union of Pure and Applied Chemistry.

 

A chemical nomenclature is a set of rules to generate systematic names for chemical compounds. The nomenclature used most frequently worldwide is the one created and developed by the International Union of Pure and Applied Chemistry (IUPAC).

Report Error

View Answer Report Error Discuss

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

5 4000
Q:

Neutrino has

A) charge +1, mass 1 B) charge 0, mas 0
C) charge -1,mass 1 D) charge 0, mass 1
 
Answer & Explanation Answer: B) charge 0, mas 0

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

5 3989
Q:

Which atom has the largest radius?

A) Neon B) Francium
C) Helium D) Cesium
 
Answer & Explanation Answer: B) Francium

Explanation:

which_atom_has_the_largest_radius1537434800.gif image

In the periodic table, the atomic radius increases from top to bottom in the groups and it increases from right to left in the periods.

 

Francium is the atom with largest atomic radius. Helium is the atom with smallest radius.

Report Error

View Answer Report Error Discuss

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

3 3981
Q:

Which choice best describes the polarity of BrF5?

A) nonpolar bonds / nonpolar molecule B) nonpolar bonds / polar molecule
C) polar bonds / polar molecule D) polar bonds / nonpolar molecule
 
Answer & Explanation Answer: C) polar bonds / polar molecule

Explanation:
Report Error

View Answer Report Error Discuss

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

2 3928
Q:

A gas is found to have the formula . Its vapour density is 70.The value of n must be

A) 5 B) 4
C) 9 D) 6
 
Answer & Explanation Answer: A) 5

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

3 3928
Q:

What is the bond order of N2+?

A) 3 B) 1.5
C) 2.5 D) 2
 
Answer & Explanation Answer: C) 2.5

Explanation:

Bond Order  = 1/2[ Nb - Na]

where

Nb = Number of electrons in bonding molecular orbitals.

Na = Number of Electrons in antibonding molecular orbitals

 

Bond Order of N2⁺:

Total number of electrons: 13

Electronic Configuration= :σ1s² σ*1s² σ2s² σ*2s² π 2py² [π2pz² σ2px1 ]

Bond Order = [9-4]/2 = 5/2 = 2.5.

Report Error

View Answer Report Error Discuss

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

5 3925