Questions
The constituents of the mixture are easily seen with naked eyes. Then the mixture is ____________.
- Homogenous
- Heterogenous
- Both (a) and (b)
- None of these
Which of the following statement(s) is\are not correct?
- $\text{An element of a substance contains only one kind of atom}$
- $\text{A mixture is not always heterogeneous}$
- $\text{Elements can exist as atoms or molecules but compounds exist only as molecules}$
- $\text{Atoms of same element have always same atomic mass number}$
The example of heterogeneous mixture is:
- Water and stone.
- Water and lemon juice.
- Water and alcohol.
- Water and sugar.
A mixture of $100mL$ of $CO,CO_2$ and $O_2$ was sparked. When the resulting gaseous mixture was passed through $KOH$ solution, concentration in volume decrease by $80mL$,. the composition of initla mixture may be (in the same order).
(a) $30mL,60mL,10mL$ (b) $30mL,50mL,20mL$ (c) $50mL,30mL,20mL$ (d) $20mL,70mL,10mL$
- a and c
- a and b
- b and d
- c and d
Molecules is the smallest particle of _______________
- compound
- substance
- mixture
- element
Two solid mixtures are :
- steel.
- solder.
- phosphor bronze.
- all of these.
The separation of mixture depends on :
- boiling point
- solubility
- magnetic nature
- all of these
A mixture refers to the physical combination of two or more substances on which the chemical identities are retained and are mixed in the form of solutions, suspensions, and colloids.
- True
- False
Soil is a homogeneous mixture.
- True
- False
Vinegar is a solution of acetic acid in water, it is:
- a homogeneous solid in liquid mixture
- a heterogeneous liquid in liquid mixture
- a homogeneous liquid in liquid mixture
- none of these
The heterogeneous mixture of soot particles in air is a mixture of:
- solid-in-solid
- solid-in-gas
- gas-in-solid
- gas-in-gas
Unlike gases, can all liquids in liquid mixtures form solutions.
- True
- False
Match the column I with column II and select the correct option from the codes given :
Column I Column II
P. Chalk-water mixture (i) A gaseous mixture
Q. Glucose solution (ii) A solid-gas mixture
R. Fizzy drink (iii) A homogeneous solid-liquid mixture
S. Smoke (iv) A solid-liquid mixture
T. Air (v) A gas-liquid mixture
- P-(iii), Q-(iv), R-(v), S-(i), T-(ii)
- P- (v), Q- (iii), R- (iv), S- (ii), T-(i)
- P-(ii), Q-(i), R-(iv), S- (v), T- (iii)
- P-( iv), Q- (iii), R- (v), S-(ii), T-(i)
Which pair is a miscible liquid mixture?
- Ethylalcohol and water
- Mercury and alcohol
- Benzene and water
- Carbondisulphide and water