Chemical Properties of Metals

Q.

Why are noble gases monoatomic?

Q.

Differentiate between alkali metal and alkaline earth metal

Q.

What is ${\mathrm{Fe}}_2{\mathrm{O}}_3.{\mathrm{xH}}_2\mathrm{O}$?

Q.

Question 7
Can you store lemon pickle in an aluminium utensil? Explain.

Q.

Which of the following metals react vigorously with cold water?

1. HCl

2. H₂CO₃

3. H₂SO₄

4. CH₃COOH

Q.

A solution of silver nitrate should only be stirred with a spoon made of ­­­__________ metal.

Q.

Compare the chemical properties of metals and non-metals in tabular form.

Q. Metals tend to lose electrons and are electropositive in nature whereas non-metals tend to gain electrons and are electronegative. Identify the correct statement regarding metals and non-metals upon combination.

1. They form covalent compounds
2. They form metallic bonding
3. They form organic compounds
4. They form ionic compounds

Q.

Why are they called alkaline earth metals?

Q. Which of the following metal(s) can replace copper from copper sulphate?

1. Gold
2. Magnesium
3. Iron
4. Silver

Q. Which of the following metal catch fire on reaction with air?

1. Calcium
2. Potassium
3. Magnesium
4. Manganese

Q. Which of the following metals do not react even with steam.?

1. Sodium
2. Calcium
3. Iron
4. Silver

Q. Calcium hydroxide is basic in nature. Identify the metal present in the compound?

1. Hydrogen
2. Oxygen
3. Calcium
4. Helium

Q.

Which among the following is the most reactive metal ?

(a) copper

(b) calcium

(c) iron

(d) magnesium

Q.

Give an example of silvery-white metal.

Q.

PbS is the chemical formula for which mineral?

1. Galena

2. Lead

3. Graphite

4. Malachite

Q. Which gas is produced by a piece of charcoal burning in an open environment?

1. $CO$
2. $C{O}_2$
3. $H_{2}S$
4. $O_2$

Q.

Answer in short ?

Lemon pickle should not be stored in aluminium utensils.

Q.

An element burns in air to form an oxide.The aqueous solution of this oxide turns turmeric paper red. State whether the element is a metal or non-metal.Name one such element.

Q.

State whether the following statements are true or false :

(a) All metals exist in solid form at room temperature.

(b) Coal can be drawn into wires.

(c) Non-metals react with dilute acids to produce hydrogen gas.

(d) Sodium is a very reactive metal.

(e) Copper displaces zinc from zinc sulphate solution.

(f) Rust formed on iron objects is basic in nature.

(g) Non-metals react with water to form a gas which burns with a 'pop' sound.

Q. Which is the most electropositive metal?

Q.

A metal $\mathrm{E}$ is stored under kerosene. When a small piece of it is left open in the air, it catches fire. When the product formed is dissolved in water, it turns red litmus to blue:
(i) Name the metal $\mathrm{E}$.
(ii) Write the chemical equation for the reaction when it is exposed to air and when the product is dissolved in water.
(iii) Explain the process by which the metal is obtained from its molten chloride.

Q.

The element which is stored under kerosene is

(a) sulphur

(b) phosphorus

(c) sodium

(d) silicon

Q.

If copper is kept open in the air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of

1. ${\mathrm{CuSO}}_4$

2. ${\mathrm{CuCO}}_3$

3. $\mathrm{Cu}{\left({\mathrm{NO}}_3\right)}_2$

4. $\mathrm{CuO}$

Q. Non metals do not react with water and acids.

1. True
2. False

Q.

What happens when dilute sulphuric acid reacts with a copper plate?

1. Copper sulphate is formed
2. Hydrogen gas is released
3. Copper sulphite is formed
4. No Reaction takes place.

Q. What is the difference between alkali metals and other metals?

Q.

What is malleability?

Q. When MgO is dissolved in water, $Mg{\left(OH\right)}_2$is obtained. The solution thus obtained is ___ in nature.

1. Reactive
2. Neutral
3. Alkaline
4. Acidic

Q.

What happens when liquid Mercury is poured into a beaker containing aqueous solution of Copper (II) sulphate pentahydrate ?