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

Among the Period 2 elements, the element which has high electron affinity is

Arrange the following as per instruction given in the bracket.
Cl, F, Br, I (increasing electron affinity)

The changes in the properties of elements on moving from left to right across a period of the Periodic Table. For the property, choose the correct answer. 

The electron affinity of elements in groups 1 to 7:

In a period, increase in electron affinity increases ______.

On descending a group, ______ in ionisation potential as well as electron affinity ______ oxidising capacity.

Explain the following method with example.  

Double decomposition (precipitation)

Write the balanced equation for the preparation of the following compound (as major product) starting from iron and using only one other substance:

Iron (II) sulphide

The following table is related to an industrial process of an acid.

Identify (a), (b) and (c).

The electron affinity of an element X is greater than that of element Y.

How is the oxidising power of X likely to compare with that of Y?

The electron affinity of an element X is greater than that of element Y.

How is the electronegativity of X likely to compare with that of Y?

The electron affinity of an element X is greater than that of element Y.

State whether X is likely to be placed to the left or to the right of Y in the periodic table.

Arrange the following as per instruction given in the bracket.

Cl, F, Br, I (increasing electron affinity)

Among period 2 elements A, B, C and D, the one which has highest electron affinity is ______.

In Period 3 of the Periodic Table, element B is placed to the left of element A. On the basis of this information, choose the correct word from the option to complete the following statement:

The element A would probably have ______ electron affinity than B.

State electron affinity unit.

Identify the term/substance in the following:

The electrons present in the outermost shell of an atom.

By drawing an electron dot diagram show the formation of Ammonium ion [Atomic No.: N = 7 and H = 1]

Choose the most appropriate answer of the following:

Bonding in this molecule can be understood to involve coordinate bonding

(A) Carbon tetrachloride

(B) Hydrogen

(C) Hydrogen chloride

(D) Ammonium chloride

Identify the anion present in the following compounds:

A salt M on treatment with concentrated sulphuric acid produces a gas which fumes in moist air and gives dense fumes with ammonia

The following table shows the test a student performed on four different aqueous solutions which are X, Y, Z and W. Based on the observations provided, identify the cation present: