Homogeneous Mixtures

Q.

Identify the solutions among the following mixtures.

1. Soil

2. Seawater

3. Air

4. Coal

5. Soda water

Q.

Is smoke a homogeneous or heterogeneous mixture? Give reasons to support your answer.

Q.

Name the process by which common salt is obtained from seawater.

Q.

The process of separating a liquid and a solid from a mixture using a sieve-like filter paper is called ___ .

1. winnowing

2. filtration

3. sedimentation

4. evaporation

Q.

A solution of salt in water is a homogeneous mixture.

1. True
2. False

Q.

Heterogeneous mixtures have a non-uniform composition of constituents.

1. True
2. False

Q.

Lime juice in water is a homogeneous mixture.

1. True
2. False

Q.

Tea leaves can be separated from tea using the method of _____.

1. Winnowing

2. Threshing

3. Handpicking

4. Filtration

Q.

Define mixture. What are the types of mixtures? Give one example of each type of mixture.

Q. While preparing chapatis, Paheli found that the flour to be used was mixed with wheat grains. Which among the following is the most suitable method to separate the grains from the flour?

1. Threshing
2. Sieving
3. Winnowing
4. Filtration

Q.

What do you mean by the term solution?

Q.

Common salt in water is a homogeneous mixture.

1. True
2. False

Q. Most of the mixtures occurring in nature are heterogeneous.

1. False
2. True

Q. The process of beating bundle of stalks to remove grains is known as _______.​

1. handpicking
2. threshing
3. decantation
4. sieving

Q.

Which of the following is incorrect about a heterogeneous mixture?

1. Constituents of heterogeneous mixtures are uniformly mixed.

2. It is composed of multiple separate parts.

3. It is composed of a chemical solution.

4. All of the above

Q.

Pizza is a ____ mixture of dough, sauce, cheese, and other toppings.

1. homogeneous mixture

2. homogeneous solution

3. heterogeneous mixture

4. both a and c

Q.

How can we separate green grapes from black grapes?

1. Winnowing

2. Sublimation
3. Threshing

4. Handpicking

Q.

Aditya took a steel spoonful of salt water and heated the spoon over the spirit lamp. Which of the given statements are correct about his observation?

1. Water gets evaporated

2. Salt is left behind

3. The process is evaporation

4. Only a and b

Q.

Identify the method by which chalk and water or even clay and water can be separated.

1. Handpicking

2. Filtration

3. Threshing

4. Winnowing

Q. Study the table given below.
$$\begin{array}{ccc}\text{Mixture}& \text{Wanted Component}& \text{Unwanted Component}\\ \text{Wheat Flour}& \text{Flour}& \text{X}\\ \text{Y}& \text{Grain seeds}& \text{Stalks}\end{array}$$Based on the above information, identify X and Y.

1. X = Husk
   Y = Paddy
2. X = Wheat
   Y = Husk
3. X = Wheat
   Y = Sawdust
4. X = Husk
   Y = Sand

Q.

A solution of sugar or table salt in water is an example of ______ mixture.

Q. _______ is a method used to separate insoluble solids from a soild-liquid mixture.

1. Winnowing
2. Sieving
3. Filtration
4. Threshing

Q. A crushed food sample when placed and rubbed on a sheet of paper leaves translucent marks. This indicates the presence of :

1. Carbohydrates
2. Fats
3. Proteins
4. Vitamins

Q.

Define mixture. What are the types of mixtures? Give one example of each type of mixture.

Q.

Find the odd one out Give a reason for your ansewr

1. Winnowing, decanitation, filtration and destilation
2. Air, water, common salt and lime
3. Salt solution. milk, fruit juice, and alcohal
4. Dislilate, precipiate, filtrate and filterpaper

Q. John has two jars A and B. Jar A has water and jar B has oil in it. Now he adds oil in jar A and water in jar B and waits for some time. What would be the final result?

1. Jar A - Oil floats over water
   Jar B - Water floats over oil
   
2. Jar A - Oil floats over water
   Jar B - Oil floats over water
   
3. Jar A - Water floats over oil
   Jar B - Water floats over oil
   
4. Jar A - Water floats over oil
   Jar B - Oil floats over water
   

Q. Study the table given below.
$$\begin{array}{ccc}\text{Mixture}& \text{Wanted Component}& \text{Unwanted Component}\\ \text{Wheat Flour}& \text{Flour}& \text{X}\\ \text{Y}& \text{Grain seeds}& \text{Stalks}\end{array}$$Based on the above information, identify X and Y.

1. X = Husk
   Y = Paddy
2. X = Husk
   Y = Sand
3. X = Wheat
   Y = Husk
4. X = Wheat
   Y = Sawdust

Q.

Which of the following term is used for a system with uniform composition and each part with same properties?

1. Heterogeneous mixture

2. Homogeneous mixture

3. Pure mixture

4. Colloidal solution

Q.

Define the following term, giving two examples :

Heterogeneous mixture

Q.

The grains from stalk can be separated by using the process of sieving.

1. False

2. True