(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Chemistry

Name a compound prepared by ammonia and is used as laboratory reagent.

Ammonia reacts with excess chlorine to form ______.

 Li, K, Na, H (In the decreasing order of their ionization potential) 

Among the elements of the second period, Li to Ne, pick out the element with highest first ionization energy

A, B, C are three elements in which B is an inert gas other than helium.With this information complete the following table.

Also, explain the following : Ionization energy of element C is less than that of element A.

Arrange the following in increasing order of property indicated
Li, Be, B (ionization energy)

What is meant by ionization potential?

In a group, a particular element has the lowest ionization potential; does it ionize most easily or least easily? Explain with example.

Electron affinities of two elements A and B are given below:
A = 3.79 electron volts
B = 3.56 electron volts
Which of them will ionize more easily and why?

State whether the ionization potential increases or decreases on going down a group.

With reference to the variation of properties in the Periodic Table, which of the following is generally true?
Ionization potential increases from left to right across a period.

Supply the missing word from those in the brackets:
If an element has a low ionization energy then it is likely to be ______ (metallic/ non-metallic).

The metals of group 2 from top to bottom are: Be, Mg, Ca, Sr, Ba. Which of these metals will form ions most readily and why?

Fill in the blank from the choices given below
Across a period, the ionisation potential ____________.

which element has the highest ionisation potential.

Choose the correct answer from the choice given:
Ionisation potential increases over a period from left to right because the

Arrange the following as per instruction given in the bracket.
Na, K, Cl, S, Si (increasing ionisation potential)

Rewrite the following sentence by using the correct > (greater than) or < (less than) in the blank given 
The ionization potential of potassium is _______ that of sodium.

Fill in the blank by selecting the correct word from the option.
If an element has a low ionization energy then it is likely to be ________ 

Fill in the blank from the choice given in bracket.
The energy required to remove on electron from a natural isolated gaseous atom and convert it into a positively charged gaseous ion is called ____________