Sawaal
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
Related Questions
Q:

How many moles are there in 140g of Si (atomic mass of silicon is 28)

A) 5 B) 10
C) 28 D) 140
 
Answer & Explanation Answer: A) 5

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

43 12389
Q:

Positive ions are formed from neutral atoms by loss of

A) neutrons B) protons
C) nuclear charge D) electrons
 
Answer & Explanation Answer: D) electrons

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

21 8826
Q:

The absolute value of charge on electron was determined by

A) J.J.Thomson B) R.A. Millikan
C) Rutherford D) Chadwick
 
Answer & Explanation Answer: B) R.A. Millikan

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

59 17175
Q:

Which one of the following laws explain the formation of carbon monoxide and carbon dioxide from carbon and oxygen

A) Laws of conservation of mass B) Laws of multiple proportion
C) Laws of reciprocal proportions D) Law of definite proportions
 
Answer & Explanation Answer: B) Laws of multiple proportion

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

5 4253
Q:

An element X forms an oxide XO_{_{3}}, what ihe valency of X

A) 1 B) 2
C) 3 D) 6
 
Answer & Explanation Answer: D) 6

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

3 3517
Q:

Which one of the following elements is the poorest conductor of heat

A) sodium B) lead
C) zinc D) mercury
 
Answer & Explanation Answer: B) lead

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

45 13744
Q:

Which one among the following is the heaviest

A) 1 mole of water molecules B) 1 mole of ammonia molecules
C) 1 mole of sodium atoms D) 1 mole of hydrogen molecules
 
Answer & Explanation Answer: C) 1 mole of sodium atoms

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

30 12407
Q:

How many electrons are there in Na+

A) 1 B) 10
C) 11 D) 12
 
Answer & Explanation Answer: B) 10

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

47 16340