Multiple Choice Questions 10×1=10
1
Which of the following is less malleable?
A
Sodium
B
Iron
C
Gold
D
Silver
2
Sodium is extremely reactive metal, but it does not react with:
A
Hydrogen
B
Nitrogen
C
Sulphur
D
Phosphorus
3
What is the general trend in the atomic radius of group 1 elements as you move down the group?
A
Decreases
B
Increases
C
Remains constant
D
None of these
4
Which of the following is a characteristic of group 1 elements?
A
High ionization energy
B
Low ionization energy
C
High electron activity
D
Low electronegativity
5
What is the typical charge on the ions formed by group 1 elements?
6
Metal oxides are:
A
Bases in nature
B
Acidic in nature
C
Neutral
D
None of these
7
The melting and boiling points of non-metals are:
Hint: Non-metals have weak intermolecular forces
A
High
B
Low
C
Moderated
D
None of these
8
What is the general trend in the atomic radius of transition elements as you move across a period?
A
Increases
B
Decreases
C
Remains constant
D
None of these
9
What is the general trend in the atomic radius of noble gases as you move down a group?
A
Increases
B
Decreases
C
Remains constant
D
None of these
10
Noble gases have:
A
High reactivity
B
Low reactivity
C
High Ionization energy
D
Low electron affinity
Short Answer Questions 15×2=30
1
Why does it become easier to cut an alkali metal when we move from top to bottom in a group?
2
Predict the reactivity of potassium towards halogens.
3
In the following reaction, chlorine acts as an oxidising agent. Which is the reducing agent?
Cl2(g) + 2NaBr(aq) → 2NaCl(aq) + Br2(g)
4
Name any three elements in the periodic table which exist as liquids.
5
Name five Alkali-metals.
6
Define density. Also give example.
7
Give the name of four Halogens with their colour.
8
Differentiate between oxidation and reduction.
Hint: Remember OIL RIG – Oxidation Is Loss, Reduction Is Gain (of electrons)
9
What are transition elements?
10
Give two properties of transition metals.
11
What is Haber’s process?
12
Why noble gases are non reactive?
13
Write two uses of noble gases.
14
Why elements want to attain the configuration like noble gases?
15
How do halogens react with water? Exercise