Difference Between Mixtures and Compounds

Q.

Mention the properties of compounds.

Q.

Which is the smallest particle of an element that can take part in a chemical reaction?

1. Compound

2. Molecule

3. Mixture

4. Atom

Q.

Explain why a solution of salt in water is considered a mixture and not a compound.

Q. Study the following statements and identify the ones that correspond to a chemical change.
i. Mixing vinegar and water
ii. Mixing vinegar and baking soda
iii. Dipping an iron nail in vinegar

1. i and ii
2. ii and iii
3. Only iii
4. i, ii, and iii

Q. Question 10 (c)
Classify the following into elements, compounds and mixtures.
c. Sugar solution

Q. What are the major differences between homogenous mixture and compound?
Even though, they both are uniformly distributed. What are the obsolete features which differentiate both of them?

Q.

Two substances A and B combine to form another substance C. During the combination, heat is evolved and C has properties different from those of A and B. Identify C as element, compound, or mixture.

Q.

Classify the following into element, compound and mixture:

soap

Q.

Identify the pure substances and mixture from the following:

(a) Oxygen (b) Honey (c) Soil (d) Air

(e) Common salt (f) Petrol (g) Distilled water (h) Gold

Q.

Examine table sugar under a microscope and observe that it is made up of identical crystals. By placing it in a cup and melting in the microwave, it becomes a homogenous golden liquid. You read the ingredient list on the box and find that only one ingredient is listed: refined sucrose. The evidence you gathered indicate that table sugar is an example of a:

1. heterogeneous mixture

2. pure substance

3. solution

4. mechanical mixture

Q. Question 10 (l)
Classify the following into elements, compounds and mixtures.
l. Carbon dioxide

Q.

Give any four examples of mixtures.

Q. Which of the following is not a pure substance?

1. Oxygen
2. Hydrogen
3. Copper
4. Sand

Q. Which of the following is not a pure substance?

1. Oxygen
2. Hydrogen
3. Copper
4. Sand

Q.

Properties of pure substance?

Q.

Two chemical substances $\mathrm{A}$ and $\mathrm{B}$ combine to form a product $\mathrm{C}$ which contains both $\mathrm{A}$ and $\mathrm{B}$:

$\mathrm{A}+\mathrm{B}\to \mathrm{C}$

$\mathrm{A}$ has fixed composition and can be broken down into simpler substances by simple chemical reactions but $\mathrm{B}$ cannot. Which of the following statements concerning $\mathrm{A}$, $\mathrm{B}$ and $\mathrm{C}$ are correct?

(i) $\mathrm{A}$ and $\mathrm{B}$ are compounds

(ii) $\mathrm{A}$ and $\mathrm{B}$ are elements

(iii) $\mathrm{A}$ is a compound and $\mathrm{B}$ is an element

(iv) $\mathrm{C}$ is a compound

(v) $\mathrm{C}$ has fixed composition

(vi) $\mathrm{A}$ and $\mathrm{C}$ are compounds.

Q. Question 10 (b)
Classify the following into elements, compounds and mixtures.
b. Soil

Q. Question 10 (i)
Classify the following into elements, compounds and mixtures.
i. Air

Q.

What is mixture and pure substance?

Q.

Differentiate between compounds and mixtures.(5 points )

Q.

Match the following:

$$\begin{array}{cccc}\text{(i)}& \text{Can have variable composition of constituent elements}& \text{(A)}& \text{Compound}\\ \text{(ii)}& \text{\_\_\_ is new substance formed due to reaction of two constituent elements}& \text{(B)}& \text{Mixture}\\ \text{(iii)}& \text{Constituent elements can be separated easily}& \text{(C)}& \text{Element}\\ \text{(iv)}& \text{Can be separated only by chemical or electrochemical reactions}& & \\ \text{(v)}& \text{Composition is always fixed}& & \\ \text{(vi)}& \text{Shows properties of constituent elements}& & \end{array}$$
The correct pairs are:-

1. (ii, iii, v) – A, (iv, i) – B

2. (iv, v) – A, (iii, i) – B, (ii) - C

3. (ii, iv, v) – A, (iii, vi, i) – B

4. (iv, v) – A, (iii) – B, (ii, i) - C

Q. Question 10 (h)
Classify the following into elements, compounds and mixtures.
h. Coal

Q. Question 10 (m)
Classify the following into elements, compounds and mixtures.
m. Blood

Q.

Two substances, $A$ and $B$ were made to react to form a third substance, ${\mathrm{A}}_2\mathrm{B}$ according to the following reaction:
$2\mathrm{A}+\mathrm{B}\to {\mathrm{A}}_2\mathrm{B}$
Which of the following statements concerning this reaction are incorrect?
(i) The product ${\mathrm{A}}_2\mathrm{B}$ shows the properties of substances $A$ and $B$
(ii) The product will always have a fixed composition
(iii) The product so formed cannot be classified as a compound
(iv) The product so formed is an element

1. (i), (ii) and (iii)

2. (ii), (iii) and (iv)

3. (i), (iii) and (iv)

4. (ii), (iii) and (iv)

Q.

Two substances X and Y react to form a new substance according to the following equation:

$2\mathrm{X}+\mathrm{Y}\to {\mathrm{X}}_2\mathrm{Y}$

Which of the following are incorrect?

1. The product formed is an element
2. The product cannot be classified as a compound
3. The product will always have a fixed composition
4. ${\mathrm{X}}_2\mathrm{Y}$ exhibits the properties of both A and B

1. (i), (ii) and (iii)

2. (i), (ii) and (iv)

3. (i), (iii) and (iv)

4. (ii), (iii) and (iv)

Q. Coal tar is obtained as a by product during:

1. Steam distillation of light oil
2. Destructive distillation of bones
3. Destructive distillation of wood
4. Destructive distillation of coal

Q.

Sulphur is an element, air is a compound and steam is a mixture.

1. True

2. False

Q. Match the examples given below with its type of matter:

1. Element
2. Compound
3. Mixture

Q. Question 10 (a)
Classify the following into elements, compounds and mixtures.
a. Sodium

Q. In mixtures, a new compound is formed.

1. True
2. False