Elements, Compounds and Mixtures

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Symbols of Elements

Subtopic

Symbols of Elements under Elements, Compounds and Mixtures for Grade 6 ICSE.

Preview questions (no answers)

1.
$Sr$
A. $Sulfur$
B. $Strontium$
C. $Silver$
D. $Sodium$
2.
$W$
A. $Water$
B. $Wormium$
C. $Tungsten$
D. $Wood$
3.
$Identify the symbol for Antimony, from its Latin name 'Stibium'.$
A. $An$
B. $Am$
C. $Sb$
D. $St$
4.
$What is the chemical symbol for Cadmium?$
A. $Ca$
B. $Cd$
C. $Cm$
D. $Cr$
5.
$When the first letter and the first two letters of an element's name are already used as symbols for other elements, a different rule is applied. According to the derivation path in the flowchart, what is the correct chemical symbol for Cadmium ?$
A. $Ca$
B. $Cd$
C. $Cm$
D. $C$
6.
$Elements that share the same starting letter are assigned different symbols to distinguish them. Based on the classification chart provided, which element correctly replaces the question mark to complete the 'Single Letter Symbol' category?$
A. $Barium$
B. $Bromine$
C. $Boron$
D. $Beryllium$
7.
$Sn$
A. $Stibium$
B. $Stannum$
C. $Strontium$
D. $Selenium$
8.
$Study the relationship in the diagram and find the missing symbol.$
A. $P$
B. $K$
C. $Po$
D. $Pt$
9.
$N$
A. $Neon was discovered after Nickel, so 'e' was used to avoid conflict.$
B. $The 'e' in Neon is the second letter of its name, whereas in Nickel, 'i' is the second letter.$
C. $Nickel is a metal and Neon is a gas.$
D. $It was a random assignment.$
10.
$Which of these elements has a symbol that is the first letter of its Latin name, but NOT the first letter of its English name?$
A. $Potassium$
B. $Silver$
C. $Antimony$
D. $None of the above$

Download the worksheet for Elements, Compounds and Mixtures - Symbols of Elements to practice offline. It includes additional chapter-level practice questions.

Chemical Formulae of Compounds

Subtopic

Chemical Formulae of Compounds under Elements, Compounds and Mixtures for Grade 6 ICSE.

About Topic & Revision

Preview questions (no answers)

1.
$NH_3$
A. $Neon hydride$
B. $Ammonia$
C. $Nitrogen oxide$
D. $Ammonium$
2.
$Which of the following is the correct symbol for Sodium?$
A. $S$
B. $So$
C. $Na$
D. $Sd$
3.
$HCl$
A. $1$
B. $2$
C. $3$
D. $4$
4.
$Which of these formulas indicates a compound containing Calcium, Carbon, and Oxygen?$
A. $CaO$
B. $CO_2$
C. $CaCO_3$
D. $CaC$
5.
$NaOH$
A. $Sodium$
B. $Potassium$
C. $Oxygen and Hydrogen$
D. $Nitrogen$
6.
$The formula for Sodium nitrate is:$
A. $NaNO_{2}$
B. $SNO_{3}$
C. $NaNO_{3}$
D. $Na_{3}N$
7.
$N_{2}O$
A. $2$
B. $3$
C. $4$
D. $1$
8.
$Which of the following is the correct chemical formula for Ferric Chloride, which contains one Iron atom and three Chlorine atoms?$
A. $FeCl_{3}$
B. $Fe_{3}Cl$
C. $3FeCl$
D. $FeCl3$
9.
$5O_{2}$
A. $The number of Oxygen atoms in one molecule of Oxygen gas.$
B. $The number of molecules of Oxygen.$
C. $The total number of Oxygen atoms in the whole expression.$
D. $The valency of Oxygen.$
10.
$Which of the following formulas correctly represents a molecule containing three different elements?$
A. $KClO_{3}$
B. $O_{3}$
C. $Cl_{2}$
D. $NaCl$

Download the worksheet for Elements, Compounds and Mixtures - Chemical Formulae of Compounds to practice offline. It includes additional chapter-level practice questions.

Characteristics of Mixtures

Subtopic

Characteristics of Mixtures under Elements, Compounds and Mixtures for Grade 6 ICSE.

About Topic & Revision

Preview questions (no answers)

1.
$Which of these is a gaseous mixture essential for life?$
A. $Carbon dioxide$
B. $Water vapor$
C. $Air$
D. $Methane$
2.
$When we mix lemon juice and water, do we get a new substance with totally different properties?$
A. $Yes, a new chemical is formed$
B. $No, it's a mixture where we can still taste the lemon$
C. $Yes, the water disappears$
D. $No, because the lemon juice becomes solid$
3.
$Which of the following is a characteristic of mixtures like sea water?$
A. $It only contains one type of molecule$
B. $It is formed by a chemical reaction between salt and water$
C. $It has variable composition depending on the location$
D. $It cannot be separated by boiling$
4.
$In a mixture of iron and sulfur powder (not heated), how can you show iron is still iron?$
A. $By adding water to make it rust$
B. $By using a magnet to attract the iron$
C. $By looking at the yellow color of iron$
D. $By tasting the mixture$
5.
$A mixture of sawdust and water can be best separated by:$
A. $Magnetic separation$
B. $Filtration$
C. $Sublimation$
D. $Evaporation$
6.
$Which of the following is a mixture of a liquid and a gas?$
A. $Soda water$
B. $Bronze$
C. $Air$
D. $Salt solution$
7.
$Why can’t a mixture be represented by a fixed chemical formula?$
A. $Because its constituents are always elements.$
B. $Because its constituents are present in variable ratios.$
C. $Because it is always in the liquid state.$
D. $Because it contains only one type of atom.$
8.
$If you mix blue ink and water, the whole liquid turns blue. Why is this still a mixture?$
A. $Because the blue color is a new chemical property.$
B. $Because the water and ink can be separated by distillation (the water evaporates and the dye remains).$
C. $Because the ink cannot be seen under a microscope.$
D. $Because it has a fixed composition of 50% ink and 50% water.$
9.
$0^{\circ}\text{C}$
A. $A mixture of two substances (salt and ice) has a different freezing/melting point than the pure substance.$
B. $The salt chemically reacts with the ice to produce heat.$
C. $The ice becomes a compound of sodium and water.$
D. $Salt is an element that generates cold energy.$
10.
$A homogeneous mixture of two or more metals, or a metal and a non-metal, is known as an alloy. Which characteristic of alloys proves they are mixtures?$
A. $They are always shiny like pure metals.$
B. $They show the properties of the constituent elements (e.g., electrical conductivity) and have variable composition.$
C. $They can only be formed at very low temperatures.$
D. $Fe_2C_1$

Download the worksheet for Elements, Compounds and Mixtures - Characteristics of Mixtures to practice offline. It includes additional chapter-level practice questions.

Methods of Separation (Filtration, Evaporation, Distillation, etc.)

Subtopic

Methods of Separation (Filtration, Evaporation, Distillation, etc.) under Elements, Compounds and Mixtures for Grade 6 ICSE.

About Topic & Revision

Preview questions (no answers)

1.
$Which of the following is a mixture of gases that can be separated by cooling and compression?$
A. $Water$
B. $Air$
C. $Sugar solution$
D. $Soil$
2.
$Which of these mixtures can be separated by handpicking?$
A. $Salt and Sugar$
B. $Pulses and stones$
C. $Oil and Water$
D. $Sand and Iron filings$
3.
$What is the main advantage of distillation over evaporation?$
A. $It is faster$
B. $It is cheaper$
C. $We can recover the solvent$
D. $It doesn't require heat$
4.
$If we want to separate a mixture of wheat flour and bran, which method is used in kitchens?$
A. $Filtration$
B. $Winnowing$
C. $Sieving$
D. $Distillation$
5.
$What is the main advantage of using a centrifuge for separation compared to simple sedimentation?$
A. $It is much faster for separating fine particles$
B. $It can separate miscible liquids$
C. $It does not require any energy$
D. $It changes the chemical properties of the mixture$
6.
$Which method would be best to separate a mixture of wheat and dry leaves?$
A. $Winnowing$
B. $Filtration$
C. $Evaporation$
D. $Magnetic separation$
7.
$In chromatography, components of a mixture are separated based on their different:$
A. $Boiling points$
B. $Rates of movement on a stationary phase$
C. $Magnetic strengths$
D. $Densities$
8.
$If a mixture contains Sand and Iodine, the Iodine can be recovered in its solid state on the walls of an inverted funnel by which cooling process?$
A. $Deposition (Vapor to Solid)$
B. $Condensation (Vapor to Liquid)$
C. $Solidification (Liquid to Solid)$
D. $Evaporation (Liquid to Vapor)$
9.
$Which of the following methods would you use to separate a very small amount of a mixture of amino acids?$
A. $Chromatography$
B. $Fractional Distillation$
C. $Sedimentation$
D. $Sieving$
10.
$Why is it not possible to separate a mixture of Alcohol and Water by using a separating funnel?$
A. $Because they are completely miscible and do not form separate layers$
B. $Because they have the same density$
C. $Because they react chemically to form a new compound$
D. $Because both are liquids at room temperature$

Download the worksheet for Elements, Compounds and Mixtures - Methods of Separation (Filtration, Evaporation, Distillation, etc.) to practice offline. It includes additional chapter-level practice questions.

Elements, Compounds and Mixtures

Symbols of Elements

❓Preview questions (no answers)

Chemical Formulae of Compounds

❓Preview questions (no answers)

Characteristics of Mixtures

❓Preview questions (no answers)

Methods of Separation (Filtration, Evaporation, Distillation, etc.)

❓Preview questions (no answers)

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