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:

In a compound the elements are always present in definite proportions by ______

A) mass B) volume
C) size D) No option is correct
 
Answer & Explanation Answer: A) mass

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

2 1255
Q:

Chemical name of vinegar is

A) Onam B) Pongal
C) Bihu D) Hornbill
 
Answer & Explanation Answer: B) Pongal

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

1 1206
Q:

Inert gases are

A) Miscible with water B) Not stable
C) Chemically unreactive D) Chemically very active
 
Answer & Explanation Answer: C) Chemically unreactive

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

1 968
Q:

In arc welding, Argon is used because of its

A) Low reactivity with metal B) Ability to lower the melting point of the metal
C) High flammability D) High calorific value
 
Answer & Explanation Answer: A) Low reactivity with metal

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

1 1112
Q:

Nitric acid does not react with

A) Gold B) Copper
C) Zinc D) Iron
 
Answer & Explanation Answer: A) Gold

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

4 993
Q:

All isotopes of the same element have ____________

A) different atomic numbers and different atomic mass B) different atomic numbers and the same atomic mass
C) the same atomic number but different atomic masses D) the same atomic number and the atomic mass
 
Answer & Explanation Answer: C) the same atomic number but different atomic masses

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

4 747
Q:

Which one of the following forms of phosphorus is most reactive?

A) Black phosphorus B) White phosphorus
C) Violet phosphorus D) Red phosphorus
 
Answer & Explanation Answer: B) White phosphorus

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

3 1136
Q:

Calcium salts used as fertilizer is:

A) Calcium Carbide B) Calcium Carbonate
C) Calcium Cyanide D) Calcium Sulphate
 
Answer & Explanation Answer: D) Calcium Sulphate

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

3 1427