1
Q:

In modern periodic table while going from top to bottom in a group ______.

 

A) size of an atom increases B) size of an atom decreases
C) ionisation energy of an atom increases D)  size and ionisation energy of an atom increases

Answer:   D)  size and ionisation energy of an atom increases



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

Which of the follow is the last element in Newlands Law of Octaves classification?

A) Rhodium B) Radium
C) Iron D) Thorium
 
Answer & Explanation Answer: D) Thorium

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: CAT , Bank Exams , AIEEE

1 1239
Q:

By which of the following processes are metals of high reactivity extracted from purified molten ore?

A) Reduction by an appropriate reducing agent B) Roasting
C) Electrolysis D) Calcination
 
Answer & Explanation Answer: C) Electrolysis

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams , AIEEE

1 1069
Q:

How many atoms are present in a (NH4)2SO4 molecule?

A) 15 B) 14
C) 13 D) 12
 
Answer & Explanation Answer: A) 15

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams , CAT

0 1259
Q:

In Mendeleev's periodic table, the properties of the elements are considered a periodic function of their:

A) Atomic mass B) Ionization enthalpy
C) Atomic size D) Atomic number
 
Answer & Explanation Answer: A) Atomic mass

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: CAT , Bank Exams , AIEEE

0 1168
Q:

Which gas is released when water is added to bleaching powder?

A) Oxygen B) Hydrogen
C) Carbon dioxide D) Chlorine
 
Answer & Explanation Answer: D) Chlorine

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: CAT , Bank Exams , AIEEE

0 1104
Q:

Atoms of same element having different mass numbers are called__________

A) Isobars B) Isotopes
C) Isotones D) Isomers
 
Answer & Explanation Answer: B) Isotopes

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams , GATE

0 1245
Q:

Decane has how many hydrogen atoms?

A) 22 B) 24
C) 11 D) 33
 
Answer & Explanation Answer: A) 22

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams , CAT

0 1307
Q:

_______________ of a material is defined as the minimum amount of the work necessary to remove a free electron from the surface of the material.

A) The electro-repulsive force B) The coulomb factor
C) The power factor D) The work function
 
Answer & Explanation Answer: D) The work function

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams

0 939