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:

Name the Scientist who stated that matter can be converted into energy

A) Boyle B) Lavoisier
C) Avogadro D) Einstein
 
Answer & Explanation Answer: D) Einstein

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

146 24064
Q:

Standard Electrode potential is measured in terms of

A) Pyrometer B) Electrometer
C) Thermometer D) Voltmeter
 
Answer & Explanation Answer: D) Voltmeter

Explanation:

Voltmeter is used to measure Standard Electrode Potential

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

6 4729
Q:

What is the structure of IF7 ?

A) Triagonal bipyramid B) Pentagonal bipyramid
C) Square pyramid D) tetrahedral
 
Answer & Explanation Answer: B) Pentagonal bipyramid

Explanation:

In IF7 out of 7 Flourine atoms 5 of them are placed on a plane in Pentagon shape .In remaining 2 flourines one is placed above the plane and other below the plane each at 90 degrees

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

196 28221
Q:

Number of moles of CO2 present in 24 grams of carbon is

A) 0.5 B) 1
C) 2 D) 0.25
 
Answer & Explanation Answer: C) 2

Explanation:

1 mole of CO2 contain 12gms of carbon and 44 gms of CO2

therefore  24 gms of carbon is present in 88 gms of CO2 or 2 moles of CO2

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

7 3659
Q:

Atomic weight of an element is given by

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

Explanation:

Atomic weight=number of neutrons+number of protons

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

7 3744
Q:

Number of moles of solute present in 1 litre of solution is

A) Normality B) Molarity
C) Molality D) Formality
 
Answer & Explanation Answer: B) Molarity

Explanation:

Moles of solute present in 1 litre or 1000ml of solution is called molarity

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

5 3670
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 3978
Q:

A bond formed by sharing of electrons between atoms of the element is called

A) ionic bond B) covalent bond
C) co ordinate bond D) none
 
Answer & Explanation Answer: B) covalent bond

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

11 4656