1 ) Classify the following into solution, suspension and colloids Fog
A ) Solution
B ) Suspension
C ) Colloid
Ans C ) Colloid
2 ) The sweetness of milk is due to the ingredient called …………….
A ) Glucose
B ) Lactose
Ans B ) Lactose
3 ) All the smallest particles in an element or compound are alike.
A ) True
B ) False
Ans A ) True
4 ) Write the valency of the given elements.
Magnesium-Mg
A ) 1
B ) 2
C ) 3
Ans B ) 2
5 ) Atoms/ molecules of a are of two or more types.
A ) Compound
B ) Mixture
Ans B ) Mixture
6 ) Co-related terms
Chlorophyll : Magnesium :: Cobalt
A ) Cyanocobalamine
B ) hemoglobin
Ans A ) Cyanocobalamine
7 ) In water, the proportion of oxygen and hydrogen by weight is always ……………
A ) 1:8
B ) 8:1
Ans B ) 8:1
8 ) Solids show the property of elasticity.
A ) True
B ) False
Ans A ) True
9 ) Co-related terms
Cyanocobalamine : Complex Compound :: Limestone: ……………
A ) Organic compound
B ) Inorganic compound
Ans B ) Inorganic compound
10 ) The intermolecular force is in the particles of solid.
A ) Minimum B ) Moderate C ) Maximum D ) Indefinite
Ans C ) Maximum
11 ) Matter is classified into the types: mixture, compound and element, by applying the criterion …………… .
A ) States of matter
B ) Phases of matter
C ) Chemical composition of matter
D ) All of these
Ans C ) Chemical composition of matter
12) Bronze contains atoms of the element aluminium and copper.
A ) True
B ) False
Ans B ) False
13 ) Write the molecular formula of the given compound.
Magnesium chloride
A ) MgCl2
B ) MgCl
C )
Ans A ) MgCl2
14 ) Various atoms in the molecules of compounds are joined by bonds.
A ) Organic
B ) Chemical
Ans B ) Chemical
15 ) Find the odd one out A ) Hydrogen
B ) Sodium
C ) Potassium
D ) Carbon
Ans D ) Carbon
16 ) Which of the following forms a suspension?
A ) Water + Milk
B ) Water + Saw dust
C ) Water + Common salt
D ) Water + Blue vitriol
Ans B ) Water + Saw dust
16 ) When all the components of a mixture form one phase, it is called mixture.
A ) Homogeneous
B ) Heterogeneous
Ans A ) Homogeneous
17 ) Write the molecular formula of the given compound.
Calcium oxide
A ) CaO
B ) Ca2O
Ans A ) CaO
18 ) Classify the following into the types of solution.
Brass
A ) Solid in solid B ) Solid in liquid C ) Liquid in liquid
Ans A ) Solid in solid
19 ) Particles in liquid vibrate at their fixed positions.
A ) False
B ) True
Ans A ) False
20 ) Write the valency of the given elements.
Sodium-Na A ) 1
B ) 2
C ) 3
Ans A ) 1
21 ) O2 is a molecule of an element.
A ) False
B ) True
Ans B ) True
22 ) Classify the following into homogeneous or heterogeneous mixture.
Blue vitriol in water.
A ) Homogeneous
B ) Heterogeneous
Ans A ) Homogeneous
23 ) Deduce the molecular formula of the compounds formed from the following pairs of elements.
Hydrogen (valency-1) and Oxygen (valency-2).
A ) HO2
B ) H2O
Ans B ) H2O
24 ) A homogeneous mixture of two or more substances is called …………….
A ) Solution
B ) Suspension
C ) Colloid
Ans A ) Solution
25 ) The other components which are in less proportion than the solvent are called …………….
A ) Solute
B ) Solvent
Ans A ) Solute
26 ) Classify the following into mixture and compound.
A greyish color substance is obtained when iron filings and sulphur are mixed together in the dish.
A ) Compound
B ) Mixture
Ans B ) Mixture
27 ) Water, mercury and bromine are similar to each other, because three are …………… .
A ) Liquids
B ) Compounds
C ) Nonmetals
D ) Elements
Ans A ) Liquids
28 ) The smallest particle of matter is element.
A ) True
B ) False
Ans B ) False
29 ) Find the odd one out
A ) Carbohydrates
B ) Proteins
C ) Hydrocarbons
D ) Soda
Ans D ) Soda
30 ) The compounds that decompose on strong heating to leave a residue behind are called ……………
compounds.
A ) Organic B ) Inorganic C ) Complex
Ans B ) Inorganic
31 ) Classify the following into the types of solution.
Vinegar
A ) Solid in solid B ) Solid in liquid C ) Liquid in liquid
Ans C ) Liquid in liquid
32 ) Write the molecular formula of the given compound.
Methane
A ) CH4
B ) C4H
Ans A ) CH4
33 ) Heterogeneous mixture of a liquid and a solid is called a …………….
A ) Solution
B ) Suspension
C ) Colloid
Ans B ) Suspension
34 ) Classify the following into homogeneous or heterogeneous mixture.
Sand in water
A ) Homogeneous
B ) Heterogeneous
Ans B ) Heterogeneous
35 ) Brass is a compound made up of Copper and Zinc.
A ) False
B ) True
Ans A ) False
36 ) Each molecule of water contains two oxygen atoms joined to one atom of hydrogen.
A ) False
B ) True
Ans A ) False
37 ) Classify the following into mixture and compound.
A black-colored substance is obtained when iron filings and sulphur are heated together in the test tube.
A ) Compound
B ) Mixture
Ans A ) Compound
38 ) The smallest particles of an element contain identical atoms.
A ) False
B ) True
Ans B ) True
39 ) Classify the following into homogeneous or heterogeneous mixture.
Oil in water
A ) Homogeneous
B ) Heterogeneous
Ans B ) Heterogeneous
40 ) Classify the following into the types of solution.
Chlorinated water
A ) Gas in liquid B ) Solid in liquid C ) Liquid in liquid
Ans A ) Gas in liquid
41 ) is an inflammable gas.
A ) Hydrogen
B ) Oxygen
Ans A ) Hydrogen
42) Classify the following into homogeneous or heterogeneous mixture.
Acetone in water
A ) Homogeneous
B ) Heterogeneous
Ans A ) Homogeneous
43 ) Sugar is a common ingredient in most of the foodstuffs. It is …………… .
A ) An inorganic compound B ) An organic compound C ) A complex compound D ) A homogenous mixture
Ans B ) An organic compound
44 ) Molecular formula indicates the number of atoms of elements present in one molecule of a compound.
A ) True
B ) False
Ans A ) True
45 ) Find the odd one out
A ) Sugar
B ) Salt
C ) Baking soda
D ) Blue vitriol
Ans A ) Sugar
46 ) Write the molecular formula of the given compound.
Magnesium oxide
A ) MgO
B ) MgO2
Ans A ) MgO
47 ) Write the symbol/ molecular formulae of given substances Nitric oxide : ……………
A ) NO
B ) NO2
Ans A ) NO
48 ) Deduce the molecular formula of the compounds formed from the following pairs of elements.
Ferrous (valency 2) and Sulphur (valency 2)
A ) Fe2S2
B ) FeS
Ans B ) FeS
49 ) The distance between the particles is moderate in liquids.
A ) True
B ) False
Ans A ) True
50 ) Write the molecular formula of the given compound.
Iron oxide
A ) Fe2S
B ) FeS
Ans B ) FeS
51 ) Find the odd one out
A ) Chlorophyll B ) Hemoglobin C ) Glucose
D ) Cyanocobalamine
Ans C ) Glucose
52 ) Write the valency of the given elements.
Chlorine-Cl
A ) 1
B ) 7
C ) 3
Ans A ) 1
53 ) Classify the following into solution, suspension and colloids Ink
A ) Solution
B ) Suspension
C ) Colloid
Ans C ) Colloid
54 ) Classify the following into the types of solution Dilute HCl
A ) Solid in solid B ) Solid in liquid C ) Liquid in liquid
Ans C ) Liquid in liquid
55 ) Classify the following into mixture and compound.
Milk contains water, lactose fats, proteins and few more natural substances. A ) Compound
B ) Mixture
Ans B ) Mixture
56) Co-related terms
Blue Vitriol : Inorganic compound :: Cooking gas : ……………
A ) Complex compound
B ) Organic compound
Ans B ) Organic compound
57) The ingredient is naturally present in large proportion in milk.
A ) Fats
B ) Water
Ans B ) Water
58) Heterogeneous mixture in which the size of the particles is around 10-5m is called …………….
A ) Solution
B ) Suspension
C ) Colloid
Ans C ) Colloid
59 ) Match the following
| Column-A | Column-B |
| i) Urea | a) Complex compound |
| ii) Rust | b) Organic compound |
| c) Inorganic compound |
A )
| Column-A | Column-B | |
| i) Urea | Organic compound | |
| ii) Rust | Inorganic compound | |
| Column-A | Column-B | |
| i) Urea | Complex compound | |
| ii) Rust | Inorganic compound | |
B )
Ans
| Column-A | Column-B |
| i) Urea | Organic compound |
| ii) Rust | Inorganic compound |
A )
60 ) The proportion of constituent elements in a compound is ……………
A ) Varying
B ) Constant
Ans B ) Constant
61 ) Gases are incompressible.
A ) True
B ) False
Ans B ) False
62 ) Matter that contain two or more constituent substances is called …………… .
A ) Mixture
B ) Compound
C ) Element
D ) Metalloid
Ans A ) Mixture
63) All the gases present together constitute a phase.
A ) Single
B ) Separate
Ans A ) Single
64 ) Write the symbol/ molecular formulae of given substances.
Nitrogen molecule : ……………
A ) N,
B ) N2
Ans B ) N2
65 ) Write the valency of the given elements Bromine-Br
A ) 1
B ) 2
C ) 3
Ans A ) 1
66) Milk is an example of type of matter called …………… .
A ) Solution
B ) Homogeneous mixture C ) Heterogeneous mixture D ) Suspension
Ans C ) Heterogeneous mixture
67 ) Deduce the molecular formula of the compounds formed from the following pairs of elements.
Nitrogen (valency 3) and Hydrogen (valency 1)
A ) N3H
B ) NH3
Ans B ) NH3
68) Carbon dioxide molecule contains one atom of carbon and two atoms of oxygen.
A ) True
B ) False
Ans A ) True
69 ) Write the valency of the given elements.
Oxygen-O
A ) 2
B ) 4
C ) 6
Ans A ) 2
70 ) The part of matter having uniform composition is called …………….
A ) State
B ) Phase
Ans B ) Phase
71 ) Write the valency of the given elements.
Carbon-C
A ) 1
B ) 4
C ) 6
Ans B ) 4
72 ) Classify the following into homogeneous or heterogeneous mixture.
Sugar in water
A ) Homogeneous
B ) Heterogeneous
Ans A ) Homogeneous
73 ) Air is a mixture containing different gases.
A ) True
B ) False
Ans A ) True
74 ) Identify the chemical bonds between the given elements and compound.
Carbon dioxide
A ) 2
B ) 3
C ) 4
Ans C ) 4
75 ) Valency of carbon is 4 and that of oxygen is 2. From this, we understand that there are chemical
bond/bonds between the carbon atom and one oxygen atom in the compound-carbon dioxide.
A ) 1
B ) 2
C ) 3
D ) 4
Ans B ) 2
76 ) Liquids neither have definite shape nor definite volume.
A ) True
B ) False
Ans B ) False
77 ) Classify the following into the types of solution.
Hydrochloric acid
A ) Solid in liquid B ) Gas in liquid C ) Liquid in liquid
Ans B ) Gas in liquid
78 ) When the components of a mixture are distributed into two or more phases it is called a mixture.
A ) Homogeneous
B ) Heterogeneous
Ans B ) Heterogeneous
79 ) The properties of the constituent substances are retained in the ……………
A ) Compound
B ) Mixture
Ans B ) Mixture
80 ) Matter exists namely in three types.
A ) False
B ) True
Ans B ) True
81 ) The molecules of compounds have a complex structure formed by many atoms along with metal
atoms in the centre of this structure.
A ) Organic B ) Inorganic C ) Complex
Ans C ) Complex
82 ) Classify the following into mixture and compound.
Pure water is formed by chemical combination of the elements hydrogen and oxygen.
A ) Compound
B ) Mixture
Ans A ) Compound
83 ) Valency of an element remains constant in its various compounds.
A ) True
B ) False
Ans A ) True
84 ) The component of a solution which is present in the largest proportion is called …………….
A ) Solute
B ) Solvent
Ans B ) Solvent
85 ) Classify the following into solution, suspension and colloids.
Sugar syrup
A ) Solution
B ) Suspension
C ) Colloid
Ans A ) Solution
86) While making cakes or bread, we use baking soda to make it fluffy. Baking soda is a …………… .
A ) Compound
B ) Mixture
C ) Colloid
D ) Suspension
Ans A ) Compound
87 ) Intermolecular force of attraction is very weak in gases.
A ) False
B ) True
Ans B ) True
88 ) Identify the chemical bonds between the given elements and compound.
NaCl
A ) 1
B ) 2
C ) 3
Ans A ) 1
89 ) Write the valency of the given elements.
A ) Nitrogen-N
B ) 2
C ) 3
D ) 5
Ans C ) 3
90 ) A atoms forms as many chemical bonds with other atoms as its valency.
A ) False
B ) True
Ans B ) True
91 ) A liquid substance along with all the soluble substance dissolved in it together constitute a …………….
phase.
A ) Single
B ) Separate
Ans A ) Single
92 ) Solids retain their volume even when external pressure is applied. This property is called …………… .
A ) Plasticity
B ) Incompressibility
C ) Fluidity
D ) Elasticity
Ans B ) Incompressibility
93 ) Write the valency of the given elements Sulphur-S
A ) 2
B ) 3
C ) 4
Ans A ) 2
94 ) Classify the following into solution, suspension and colloids Saw dust in water
A ) Solution
B ) Suspension
C ) Colloid
Ans B ) Suspension
95 ) Liquids have fluidity and their shape changes in accordance with the container.
A ) True
B ) False
Ans A ) True
96 ) An intermolecular force of attraction acts between particles of matter.
A ) True
B ) False
Ans A ) True
97 ) If the combustion is not complete, black color carbon remains behind as residue. These compounds are called compounds.
A ) Organic B ) Inorganic C ) Complex
Ans A ) Organic
98 ) Write the symbol/ molecular formulae of given substances.
Oxygen molecule : ……………
A ) O
B ) O2
Ans B ) O2
99 ) Identify the chemical bonds between the given elements and compound.
Oxygen molecule
A ) 1
B ) 2
C ) 3
Ans B ) 2
100 ) Classify the following into solution, suspension and colloids Bronze
A ) Solution
B ) Suspension
C ) Colloid
Ans A ) Solution
