Download App

Science One word answer.

Is Matter Around Us Pure? · Gujarat Board (GSEB) STD 9 (GSEB - English Medium). 92 questions.

Questions · Page 1 of 2

One word answer.

🎯

Test yourself on this topic

50 questions · timed · auto-graded

Question 11 Mark
Classify the following as elements or compounds:
Iron, Iron sulphide, Sulphur, Chalk, Washing soda, Sodium, Carbon, Urea
Answer
Elements: Iron, Sulphur, Sodium and Carbon.
Compounds: Iron sulphide, Chalk, Washing Soda and Urea.
View full question & answer→
Question 31 Mark
How would you confirm that a colourless liquid given to you is pure water?
Answer
We can check this by evaporating the given colourless liquid. If nothing is left behind then the colourless liquid is pure water.
View full question & answer→
Question 51 Mark
What elements do the following compounds contain?
Sugar, Common salt
Answer
  • Sugar contains carbon, hydrogen and oxygen.
  • Common salt contains sodium and chlorine.
View full question & answer→
Question 71 Mark
Name one metal and one non-metal which exist as liquids at room temperature.
Answer
Mercury is a liquid metal and bromine is a liquid non-metal.
View full question & answer→
Question 81 Mark
What is the general name of the process by which tea-leaves are separated from prepared tea?
Answer
Filtration.
View full question & answer→
Question 91 Mark
Name the property of any one of the components which can be used for separation the following mixture:
Salt and Camphor.
Answer
Camphor undergoes sublimation.
View full question & answer→
Question 141 Mark
Name one pair of substances whose mixture can be separated completely by distillation.
Answer
Mixture of common salt and water.
View full question & answer→
Question 181 Mark
A carpenter wants to separate iron nails from saw-dust. Which method of separation should he choose?
Answer
He should choose magnetic separation method to separate iron nails from saw-dust.
View full question & answer→
Question 191 Mark
Choose one term from the following which includes the other three:
Aerosol, emulsion, colloid, sol.
Answer
Colloid.
View full question & answer→
Question 211 Mark
Out of a colloid, solution and a suspension:
Which one has the smallest particles?
Answer
​​​Solution.
View full question & answer→
Question 221 Mark
Name the process you would use to separate a mixture of water and alcohol.
Answer
Fractional distillation.
View full question & answer→
Question 231 Mark
Give reason why:
Graphite is used for making electrode in a dry cell.
Answer
Graphite is the only non-metal which conducts electricity so it can be used to make electrodes.
View full question & answer→
Question 241 Mark
Which of the following are not compounds?
Chlorine gas, Potassium chloride, Iron powder, Iron sulphide, Aluminium foil, Iodine vapour, Graphite, Carbon monoxide, Sulphur powder, Diamond.
Answer
Chlorine gas, Aluminium foil, Iodine vapour, Graphite, Sulphur powder, Diamond are not compounds.
View full question & answer→
Question 251 Mark
What is the other name for impure substances? Give two examples of impure substances.
Answer
Mixture is another name for impure substances.
Examples: Milk and sea-water.
View full question & answer→
Question 271 Mark
What are pure substances? Give two examples of pure substances.
Answer
A pure substance is one which is made up of only one kind of atoms or molecules.
Examples: Oxygen and sugar.
View full question & answer→
Question 281 Mark
Which of the following contains less solute at a given temperature and pressure?
Unsaturated solution or Saturated solution.
Answer
Unsaturated solution contains less solute at a given temperature and pressure.
View full question & answer→
Question 291 Mark
Name a non-metal which is a good conductor of electricity.
Answer
Diamond is a non-metal which is good conductor of electricity.
View full question & answer→
Question 301 Mark
What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances?
Answer
The difference in the solubility of salt and sand in water is used to separate them from their mixture.
View full question & answer→
Question 311 Mark

What is the general name of the materials which contain at least two pure substances and show the properties of their constituents?

Answer
Mixtures.
View full question & answer→
Question 321 Mark
What are the three general classes of matter? Give one example of each type.
Answer
Three general classes of matter are elements, compounds and mixtures.
  1. Element: Hydrogen.
  2. Compound: Sodium chloride.
  3. Mixtures: Salt solution.
View full question & answer→
Question 331 Mark
Which technique can be used to detect and identify traces of poison present in the stomach wash of a person?
Answer
Chromatography.
View full question & answer→
Question 341 Mark
Name the process by which the various gases of the air are separated.
Answer
Fractional distillation of liquid air.
View full question & answer→
Question 351 Mark
Name the property of one of the constituents which can be used to separate a mixture of salt and iodine.
Answer
Iodine undergoes sublimation.
View full question & answer→
Question 361 Mark
Which technique is used in a washing machine to squeeze out water from wet clothes while drying?
Answer
Centrifugation.
View full question & answer→
Question 371 Mark
Name one element, one compound and one mixture.
Answer
Copper is an element, water is a compound and air is a mixture.
View full question & answer→
Question 381 Mark
Whose one of the allotropic forms is a good conductor of electricity. Name the allotrope.
Answer
Allotrope of carbon forms good conductor of electricity. That allotrope is graphite.
View full question & answer→
Question 391 Mark
How would you separate a mixture of sugar and salt?
Answer
Sugar is soluble in alcohol but salt is insoluble in alcohol, so a mixture of sugar and salt can be separated by using alcohol as solvent.
View full question & answer→
Question 401 Mark
Choose the solutions from among the following mixtures:
Soil, Sea-water, Air, Coal, Soda-water
Answer
Sea-water and Soda-water.
View full question & answer→
Question 411 Mark
“The properties of the product are different from those of the constituents”. State whether this statement best describes an element, a compound or a mixture.
Answer
The given statement best describes a compound.
View full question & answer→
Question 421 Mark
State any two properties for believing that aluminium is a metal.
Answer
Aluminium is malleable, ductile and sonorous, so it is a metal.
View full question & answer→
Question 431 Mark
What happens when the temperature of a saturated sugar solution is increased?
Answer
When the temperature of a saturated sugar solution is increased, it becomes unsaturated.
View full question & answer→
Question 461 Mark
Which of the following is a sol?
Saving cream, Milk, Fog, Soap solution, Hairspray.
Answer
Soap solution.
View full question & answer→
Question 471 Mark
Explain what happens when a beam of light is passed through a colloidal solution.
Answer
The path of light beam is illuminated and becomes visible.
View full question & answer→
Question 481 Mark
What is meant by caying that metals are sonorous?
Answer
This means that metals make a ringing sound when we strike them.
View full question & answer→
Question 491 Mark
What is meant by the concentration of a solution?
Answer
The concentration of a solution is the amount of solute present in given quantity of the solution.
View full question & answer→
Question 501 Mark
Name one pair of substances whose mixture can be separated by fractional distillation.
Answer
Acetone and water.
View full question & answer→
Generate Paper FreeAll Is Matter Around Us Pure? topics
One word answer. - Science STD 9 Questions - Vidyadip