Is Matter Around Us Pure Test

Is Matter Around Us Pure

This is Is Matter Around Us Pure Test-02 for CBSE class 09 Science.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

What is the density of ice at its melting point?

A
Less than the density of water
Correct
B
Equal to the density of water
C
Greater than the density of water
D
Exactly equal to\(1kg{\text{ }}/{\text{ }}{m^{3{\text{ }}}}\).

Match the following with correct response. (1) Substance retain their property (2) Elements are combined in fixed proportion by mass (3) Simple substance that cannot be broken down (4) Smallest unit of compound (A) Compound (B) Molecule (C) Element (D) Mixture

A
1-C, 2-B, 3-D, 4-A
B
1-D, 2-A, 3-C, 4-B
Correct
C
1-B, 2-D, 3-A, 4-C
D
1-A, 2-C, 3-B, 4-D

Which of following is correct about solubility- A It increases with increase in temperature B Mass of solute dissolution in 100 units of solvent C Solubility of common salt in water in 46g at \(20^\circ c\) D It decreases with decrease in temperature

A
(a), (b) and (d) are correct
Correct
B
(b) and (c) are correct
C
(a) and (b) are correct
D
All of these

Clouds and fogs are example of

A
Gas in gas solution
B
Gas in liquid solution
C
Liquid in gas solution
Correct
D
Gas in solid solution

Brass is a homogeneous mixture of

A
50% Copper and 50% Ten by mass
B
50% Copper and 50 % Zinc by mass
C
70% Copper and 30% Zinc by mass
Correct
D
70% Copper and 30% Ten by mass

Which of the following will be a heterogeneous mixture?

A
Albumin and water
Correct
B
Cane sugar and water
C
Common salt and water
D
Alum and water

4 g of solute are dissolved in 36 g of water. What is the mass percent of the solution?

A
20%
B
100%
C
10%
Correct
D
5%

Statement A: The separation of constituents from homogeneous mixture is easier as compared to heterogeneous mixture. Statement B: Milk can be regarded as a pure substance Which of the two statements is correct?

A
Statement B
B
Both the Statement A and B
C
Neither A or B
Correct
D
Statement A

Identify homogeneous mixture from the following

A
Soap bubbles are formed by blowing air into soap solution
B
Dust storm
C
A dilute solution of alcohol in water.
Correct
D
A suspension of chalk in water

To make a saturated solution, 50g of sugar is dissolved in 100 g of water at 293 K. What is its concentration at this temperature?

A
36%
B
33.3%
Correct
C
10%
D
20%

Match the following with correct response. (1) Solution having uniform composition (2) Solution with separate boundaries of various components (3) New substances are formed (4) Melting of ice (A) Homogenous (B) Chemical change (C) Heterogeneous (D) physical change

A
1-A, 2-C, 3-B, 4-D
Correct
B
1-C, 2-B, 3-D, 4-A
C
1-D, 2-A, 3-C, 4-B
D
1-B, 2-D, 3-A, 4-C

Match the following with correct response. (1) Solute (2) Solvent (3) Solution (4) Suspension (A) dissolving component of solution (B) A heterogenous mixture (C) A homogenous mixture (D) dissolved component of solution

A
1-B, 2-D, 3-A, 4-C
B
1-D, 2-A, 3-C, 4-B
Correct
C
1-A, 2-C, 3-B, 4-D
D
1-C, 2-B, 3-D, 4-A

Which of the following is correct about true solution? A Its composition is fixed B It has variable composition C Its components can be separated by filtration D It is homogeneous & transparent

A
All of these
B
(a), (b) and (c) are correct
C
(b) and (d) are correct
Correct
D
(a) and (b) are correct

Cod-liver oil is an example of

A
True solution
B
Colloidal solution
C
Emulsion
Correct
D
Suspension

How many phases are present in a colloidal solution?

A
3
B
2
Correct
C
4
D
Only one