Alkali Metals

Q.

Which alkali metal is the strongest reducing agent?

Q.

Which of the following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens is correct?

1. Chemical reactivity increases with increase in atomic number down the group in both the alkali metals and halogens.

2. In alkali metals the reactivity increases but in the halogens it decreases with increase in atomic number down the group.

3. The reactivity decreases in the alkali metals but increases in the halogens with increase in atomic number

4. In both the alkali metals and the halogens, the chemical reactivity decreases with increase in atomic number down the group.

Q.

Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements?

Q.

Which metal is the strongest reducing agent?

Q.

Write the symbol for oxide ion

Q.

Which metal reacts most vigorously with water?

Q.

What are alkali metals? Give two examples. [2 MARKS]

Q. Balance the equation- Barium chloride + aluminum sulphate = barium sulphate + aluminum chloride

Q.

What do you mean by the Free State?

1. Elements existing as elements but mixed with impurities

2. Elements existing as gases

3. Elements in their compound form

4. Elements existing in very pure and stable forms

Q.

What is the least reactive element in Group 2?

Q.

In the following set of elements, one element does not belong to the set. Select this element and explain why it does not belong :

Calcium, Magnesium, Sodium, Beryllium

Q.

How can we say that the reactivity of an element is high or the reactivity of an element is low????

Q.

Calcium is an element with atomic number 20 is it a metal or nonmetal?

Q.

(a) How does the chemical reactivity of alkali metals vary on going down in group 1 of the periodic table?

(b) How does the chemical reactivity of the halogens vary on going down in group 17 of the periodic table?

Q. All alkali metals are shiny, soft and highly reactive in nature.

1. True
2. False

Q.

State the position of the following in the Periodic Table:

(a) Alkali metals, (b) Alkaline earth metals,

(c) Iron and zinc, (d) Aluminium.

Q.

Particles that mostly affect material properties:

1. neutrons

2. protons

3. electrons

4. valence electrons

Q. The first alkali metal is:

1. Hydrogen
2. Lithium
3. Sodium
4. Francium

Q.

Among alkali metals, __has the smallest atomic radius.

Q.

What is the major characteristic of the first element in the periods of the periodic table? What is the general name of such elements?

Q.

Name four elements of group 7A. State the common name of this group of elements.

Q.

Assertion: Metals placed in group 1 are known as alkali metals.

Reason: These metals dissolve in water to form solution of Alkaline nature.

Mark the correct choice as,

1. Both assertion and reason are true and the reason is the correct explanation of assertion.

2. Both assertion and reason are true but the reason is not the correct explanation of assertion.

3. Assertion is true but the reason is false.

4. Both assertion and reason are false.

Q.

Which of the following statement is correct?

1. Group 1 elements are also called as alkaline earth metals.

2. Group 16 elements are of chalcogen family except polonium.

3. Group 2 elements are also called as alkali metals.

4. Group 17 elements are called inert elements.

Q. Write the forward and backward reaction of this chemical equation:
$2\mathrm{NaCl}\left(\mathrm{aq}\right)+{\mathrm{CaCO}}_3\left(s\right)\to {\mathrm{Na}}_2{\mathrm{CO}}_3\left(\mathrm{aq}\right)+{\mathrm{CaCl}}_2\left(\mathrm{aq}\right)$

Q. 2.amongst B, Be, Mg , Al second ionization potential is maximum for

Q.

____ is the ore of aluminium which contains a metallic element present in group IA of the periodic table.

1. Bauxite

2. Cryolite

3. Magnetite

4. Corundum

Q.

Is Po a chalcogen?

Q. Which of the following is correct trend for electron affinity in halogens?

1. $F<Cl<Br<I$
2. $F>Cl>Br>I$
3. $F<Cl>Br>I$
4. $Cl>Br>I>F$

Q. What is Alkali metal , Alkalines Alkali Bases?Difference B/w Alkali Metals and Alkali Bases?Draw a periodic Table?

Q.

What is a base? Give one example.