ICSE CHEMISTRY MCQs Class 10 Semester 1

ICSE CHEMISTRY Multiple Choice Questions - Super100 MCQs in Chemistry for Semester 1 

Question 1

The element with 2 shells and 3 valence electrons is:

A) metal

B) non-metal

C) metalloid

D) Inert gas

 

Question 2

The periodic property of elements which increases with increase in atomic radius:

A) Electronegativity

B) Electron affinity

C) Ionization potential

D) Metallic character

 

Question 3

The elements present in the same group show similarities in their properties because:

A) they have same atomic number

B) they have same number of valence electrons

C) they have same atomic mass

D) they are arranged in increasing order of atomic number

 

Question 4

The atomic size ________ down the group in The Periodic Table hence the density ____________.

A) decreases, decreases

B) increases, decreases

C) increases, increases

D) decreases, increases

 

Question 5

The element which has 3 electrons in M-shell of its atom:

A) Boron

B) Carbon

C) Magnesium

D) Aluminium

 

Question 6

The most electropositive element among the following elements:

A) Alkali metals

B) Alkaline earth metals

C) Transition elements

D) Inner transition elements

 

Question 7

The most electro-negative elements belong to:

A) Group IA/1

B) Group IIA/2

C) Group VIIA/17

D) Group VIA/16

 

Question 8

The ascending order of Electron Affinity:

A) F>Cl>Br>I

B) Cl> Br> F>I

C) F<Br<Cl<I

D) I<Br<F<Cl

 

Question 9

Helium has the highest Ionization potential because:

A) Its atomic number is 2

B) It has 2 protons in the nucleus

C) It belongs to Group 18

D) It has stable electronic configuration

 

Question 10

As the nuclear pull increases on the valence electrons, the electronegativity __________.

A) increases

B) decreases

C) remains same

D) does not exist

 

Question 11
Two elements X and Y have 2 and 7 valence electrons respectively and they have same number electron shells. When their Electron affinities are compared:

A) X=Y

B) X<Y

C) X>Y

D) Y<X

 

Question 12

Boron shows similarity in properties of:

A) Helium

B) Sodium

C) carbon

D) Silicon

 

 

Question 13

The element which has 1 valence electron but not a metal:

A) Lithium

B) Sodium

C) Hydrogen

D) Fluorine

 

Question 14

Which of the following statements is not true about halogens?

A) They belong to group 17

B) strong oxidizing agents

C) least reactive among non-metals

D) show valency 1-

 

Question 15

Which of the following elements has least metallic character?

A) Sodium

B) Magnesium

C) Aluminium

D) Potassium

 

 

Question 16

Which of the following is odd in terms of physical properties?

A) H

B) Li

C) Na

D) K

Question 17-20

	1	2	13	14	15	16	17	18
1	H							R
2						Y		Ne
3		X		M
4	Z

 

Question 17

If the X combines with Y:

A) X loses 2 electrons and oxidized

B) X loses 2 electrons and reduced

C) Y loses 2 electrons and reduced

D) Y loses 2 electrons and oxidized

 

Question 18

The number of valence electrons present in R:

A) 2

B) 4

C) 8

D) 0

 

Question 19

The element which shows metallic and non-metallic character:

A) H

B) M

C) Y

D) R

 

Question 20

The sulphate of Z is:

A) ZSO₄

B) Z₂SO₄

C) Z₃SO₄

D) Z(SO₄)₂

 _{Click here for Solutions}

Question 21

An element has 5 electrons in its valence shell. How many electrons that one atom of this element contributes for the formation of Covalent bond?

A) 1

B) 5

C) 3

D) it does not form covalent bond

 

Question 22

Two elements A and B have 2 and 7 valence electrons respectively. The nature of the compound formed between them:

A) has low melting point

B) exists in crystalline state at room temperature

C) conducts electricity in solid state

D) exists in liquid state at room temperature

 

Question 23

Which of the following statements is true about Ammonia molecule?

A) It’s a polar covalent compound

B) It’s a non-polar covalent compound

C) Its has one lone pair of electrons on Nitrogen atom

D) both A) and C)

 

Question 24

P is a metal which combines with Oxygen to form a compound with formula P₂O₃ the change that P undergoes is:

A) Reduction

B) Oxidation

C) Ionization

D) both B and C

 

Question 25

The electronic configuration of Chlorine after the formation of Ionic bond with Magnesium:

A) 2,8,7

B) 2,8,8

C) 2,8

D) 2,7

 

Question 26

If a substance contains only molecules then:

A) It has high melting point

B) It has crystalline structure

C) It is volatile

D) It conducts electricity in its molten state

 

Question 27

Which of the following compounds has strong electrostatic force ?

A) Hydrogen chloride

B) Sodium chloride

C) Carbon tetra chloride

D) water molecule

 

Question 28

The weak force of attraction that exist between the non-polar covalent molecules:

A) Electrostatic force

B) Gravitational force

C) Magnetic force

D) Van der Waal’s force

 

Question 29

The number of electrons present in the valence shell of Oxygen in Calcium Oxide:

A) 2

B) 6

C) 8

D) 0

 

Question 30

The statement which is not true about Sodium ion:

A) has stable electronic configuration

B) has 2 electron shells

C) has 1 valence electron

D) has as many electrons as Neon

 

Question 31

How many electrons does one Magnesium atom donate to each atom of Chlorine in the formation of Magnesium chloride?

A) 1

B) 2

C) 7

D) 8

 

Question 32

An element has 5 valence electrons in its atom then it combines with:

A) 5 Hydrogen atoms and forms 5 covalent bonds

B) 5 Hydrogen atoms and forms 5 electrovalent bonds

C) 3 Hydrogen atoms and forms 3 electrovalent bonds

D) 3 Hydrogen atoms and forms 3 covalent bonds

 

Question 33

Which of the following statements is true about the electrovalent compounds?

A) non-volatile

B) Cannot be electrolysed

C) Melt at low temperatures

D) undergo slow chemical reactions

 

Question 34

In the formation of an ionic bond, ______ atom loses electron/s to form ________ and _______ atom gains electron/s to form ________.

A) non-metal, anion, metal, cation

B) non-metal, cation, metal, anion

C) metal, cation, non-metal, anion

D) metal, anion, non-metal, cation

 

Question 35

The polar covalent compound is formed due to:

A) metal atoms in the compound

B) Hydrogen present in the given compound

C) difference in the number shells in the combined atoms

D) difference in the electronegativity of the combined elements

 

Question 36

When Hydrogen chloride is dissolved in water:

A) HCl dissociates and Hydrogen ion combines with water molecule to form Hydronium ion

B) HCl ionizes and Hydrogen ion combines with water molecule to form Hydronium ion

C) HCl dissociates and Hydrogen ion combines with water molecule to form hydroxide ion

D) HCl ionizes and Hydrogen ion combines with water molecule to form hydroxide ion

 

Question 37-40

P, Q, R and S are the elements with atomic number 6, 11, 16 and 8 respectively.

Question 37

The formula of the compound between Q and S:

A) QS

B) Q₂S

C) QS₂

D) QS₃

 

Question 38

The number of bonds formed by the element P :

A) 6 covalent bonds

B) 6 electrovalent bonds

C) 4 ionic bonds

D) 4 covalent bonds

 

Question 39

The type of bonding between Q and R :

A) Covalent bond

B) Coordinate bond

C) Ionic bond

D) metallic bond

 

Question 40

Which of the following equations is correct?

A) 2Q + S → Q₂S

B) Q₂ + S → Q₂S

C) 4Q + S₂ → 2Q₂S

D) 4Q + 2S → Q₄S₂

 Solutions

Question 41

A weak organic acid:

A) Hydrochloric acid

B) Sulphuric acid

C) Carbonic acid

D) Acetic acid

 

Question 42

A strong base which is soluble in water:

A) Sodium hydroxide

B) Ammonium hydroxide

C) Zinc hydroxide

D) Sodium chloride

 

Question 43

A salt which is formed by the partial neutralization of an acid with a base:

A) Normal salt

B) complex salt

C) acid salt

D) basic salt

 

Question 44

Which of the following salts is not a complex salt?

A) Nessler’s reagent

B) Common salt

C) Di amine Copper sulpahte

D) Sodium Silver cyanide

Question 45

Which of the following salts react with an acid to produce a gas with rotten egg smell?

A) Sodium chloride

B) Sodium sulphite

C) Sodium carbonate

D) sodium sulphide

 

Question 46

An acid whose basicity is not 1:

A) H₂SO₄

B) CH₃COOH

C) HCl

D) HNO₃

 

Question 47

A salt formed by complete neutralization of Sulphuric acid:

A) Sodium bi sulphate

B) Calcium bi sulphate

C) Sodium sulpahte

D) Hydrogen sulphate

 

Question 48

A gas produced when dilute HCl is added sodium sulphite:

A) turns lime water milky but has no effect on acidified KMnO₄

B) turns lime water milky but has no effect on acidified K₂Cr₂O₇

C) turns lime water milky and decolourizes acidified KMnO₄

D) turns lime water milky and decolourizes acidified K₂Cr₂O₇

 

Question 49

When Ammonium hydroxide is added to Copper sulphate:

A) It gives pale blue ppt. in small amounts and inky blue solution in excess

B) It gives pale blue ppt. in small amounts and dissolves in excess

C) It gives pale blue ppt. in small amounts and inky blue ppt. in excess

D) It gives pale blue ppt. in small amounts and disappears in excess

 

Question 50

A salt solution when treated with small amounts of Ammonium hydroxide gives a gelatinous white ppt which dissolves in excess Ammonium hydroxide:

A) PbCl₂

B) CaCl₂

C) NaCl

D) ZnCl₂

 Solutions

Question 51

A salt solution which gives a white ppt. with Sodium hydroxide but not with Ammonium hydroxide:

A) ZnSO₄

B) NaCl

C) CaCl₂

D) CuSO₄

 

Question 52

This salt solution gives a greenish white ppt with barium chloride:

A) CuSO₄

B) FeSO₄

C) ZnSO₄

D) MgSO₄

 

Question 53

Which of the following metals gives Hydrogen gas with Sodium hydroxide?

A) Na

B) Mg

C) Al

D) Ca

 

Question 54

A strong mono basic acid ‘X’ reacts with a strong alkali to produce a salt. Then the salt is :

A) a normal salt

B) an acid salt

C) a basic salt

D) both A and C

 

Question 55

Which of the following substances releases reddish brown gas on thermal decomposition?

A) Sodium nitrate

B) Calcium hydroxide

C) Copper carbonate

D) Lead nitrate

 

Question 56

A salt solution has pH value 7.2, when an alkali is added to this solution:

A) The pH becomes 7

B) The pH increases

C) The pH decreases

D) The pH remains same

 

Question 57

A greenish yellow gas:

A) Hydrogen gas

B) Oxygen gas

C) Chlorine gas

D) Sulphur dioxide gas

 

Table for Question 58-60

Solution	pH
A	2.3
B	7.0
C	12.7
D	7.9

 

Question 58

Which of these can produce highest number of hydroxyl ions in its aqueous solution?

A) A

B) B

C) C

D) D

 

Question 59

The solution which can produce Hydrogen gas with an active metal

A) A

B) B

C) C

D) none of these

 

Question 60

When Phenolphthalein indicator is added to the solution C it turns:

A) orange

B) yellow

C) blue

D) pink

Solutions

Question 61

The Vapour density of Methane :

At.  wt. H – 1, C – 12

A) 16

B) 12

C) 8

D) 4

 

Question 62

If the Vapour Density of a compound is equal to the Empirical formula wt. the n=____

A) 1

B) 3

C) 4

D) 2

 

Question 63

If the Molecular formula and the empirical formula of the compound are same then:

A) VD=2x EFwt.

B) VD= EFwt.

C) 2xVD = EFwt.

D) Half of VD = EFwt.

 

Question 64

If a compound has EF - C₂H₃ then the molecular formula of the compound could be :

A) CH₅

B) C₂H₆

C) CH₃

 

D) C₄H₆

 

Question 65

The percentage of Oxygen in Sulphuric acid:

At. wt. H-1, O-16, S-32

A) 0.65%

B) 65.30%

C) 6.4%

D) 64%

 

Question 66

The percentage composition of a compound is Na- 29.11%, S- 40.50%, O – 30.37%. Find the EF of that compound:

at. wt. O-16, Na-23, S-32

A) NaSO₃

B) Na₂SO₃

C) Na₂S₂O₃

D) NaS₂O₃

 

Question 67

The EF formula of a compound is NH₂ and its RMM is 32 then :

(At. wt. H-1, N-14)

A) n=1 and MF is N₂H₄

B) n=2 and MF is N₂H₄

C) n=1 and MF is NH₄

D) n=2 and MF is NH₂

 

Question 68

The Empirical Formula of Glucose is:

A) CH₂O

B) C₆H₁₂O₆

C) C₂H₄O₂

D) CHO

 

Question 69

The EF wt of water is:

(at wt. H-1, O-16)

A) 8

B) 9

C) 18

D) 17

 

Question 70

The EF of a compound is CH and n=6 then the molecular formula is:

A) CH₆

B) C₆H₆

C) C₆H

D) CH

 

Question 71

9.6g of Magnesium is burnt completely in presence of sufficient Oxygen to form 16g of Magnesium oxide then find the percentage of Oxygen in the product:

A) 40%

B) 60%

C) 4%

D) 6%

 

Question 72

A hydrocarbon contains 75% of Carbon and _________ % of Hydrogen in it:

A) 75%

B) 50%

C) 25%

D) 0%

 

Question 73

The Molecular wt of a compound is 90 and the EF wt is 30 then :

A) n=1

B) n=2

C) n=3

D) n=4

 

Question 74

Find the relative molecular mass of Sodium carbonate

At. wt. C-12, O-16, Na-23

A) 98

B) 86

C) 100

D) 106

 

Question 75

Find the percentage of water in Copper sulphate crystals (CuSO₄.5H₂O)

(At.wt. H-1, O-16, S-32, Cu-64)

A) 72%

B) 54%

C) 36%

D) 18%

 

Question 76

If 20% percent of a Hydrocarbon is Hydrogen, the mass of the Carbon present in 50 g of that Hydrocarbon:

A) 10g

B) 20g

C) 30g

D) 40g

 

Question 77

The vapour density of a compound is found to be twice the EF wt. then:

A) RMM = EF Mass

B) RMM = 2x EF Mass

C) RMM = 4x EF Mass

D) RMM = Half of EF Mass

 

Question 78

The simplest whole number ratio of the number of atoms of each element present in a given compound is:

A) Molecular Formula

B) Chemical Formula

C) Empirical Formula

D) Unit formula

 

Question 79

3.96 g of a gas occupies a volume of 2lit and 0.09g of Hydrogen occupies 1lit volume. Then the vapour density of the gas is:

A) 32

B) 22

C) 44

D) 11

 

Question 80

Vapour density of a compound is:

A) Half of the EF mass

B) Twice the EF mass

C) Half of the RMM

D) Twice the RMM

 Solutions

Question 81

The compound which undergoes complete dissociation:

A) Strong electrolyte

B) Weak electrolyte

C) Super electrolyte

D) Non-electrolyte

 

Question 82

Which of the following compounds conducts large amount of electricity through its aqueous solution?

A) Acetic acid

B) Ammonium hydroxide

C) Sodium chloride

D) Formic acid

 

Question 83

During electrolysis:

A) cations migrate to negative electrode

B) anions migrate to negative electrodes

C) both anions and cations migrate to negative electrode

D) neither cations nor anions migrate to negative electrode

 

Question 84

The cation which gets reduced first during the electrolysis of a solution which contains Cu²⁺ ,  Ag⁺  and H⁺ of the same concentration :

A) Cu²⁺

B) Ag⁺

C) H⁺

D) all of these ions

Question 85

When fused Lead bromide is electrolyzed using graphite electrodes the product formed at cathode is:

A) Bromine gas

B) Oxygen gas

C) Lead metal

D) Iron metal

 

Question 86

The observation at anode during the above electrolysis process:

A) Silvery metal deposit

B) Pinkish brown deposit

C) Greenish yellow gas

D) Reddish brown vapours

 

Question 87

The acid added to water before its electrolysis is:

A) Sulphuric acid because it is a strong acid

B) Sulphuric acid because it is a di basic acid

C) Sulphuric acid because it is a non-volatile acid

D) Acetic acid because it is an organic acid

 

Question 88

The cathode reaction during the electrolysis of Copper sulphate solution using Copper electrodes:

A) Cu²⁺ - 2e^- → Cu

B) Cu – 2e^- → Cu²⁺

C) Cu²⁺ + 2e^- → Cu

D) Cu → Cu²⁺ - 2e^-

 

Question 89

The colour of the copper sulphate solution, during the electrolysis using Copper electrodes:

A) fades

B) does not fade

C) turns green

D) none of the above

 

Question 90

The electrolyte used in electroplating an article with Silver is:

A) Sodium Silver Cyanide because it is cheap

B) Sodium Silver cyanide because it is water soluble salt

C) Sodium Silver cyanide because its gives long lasting coating of Silver metal

D) not Sodium silver cyanide because it gives a thick coating of Silver

Question 91

The anode reaction during electroplating an article with Nickel metal using Nickel sulphhate:

A) Ni – 2e^- → Ni²⁺

B) Ni + 2e^- →Ni²⁺

C) Ni ²⁺ + 2e^- →Ni

D) Ni²⁺ - 2e^- →Ni

 

Question 92

Which of the following metals has to electro-refined?

A) Sodium

B) Potassium

C) Aluminium

D) Copper

 

Question 93

The anode in the electro-refining of Impure copper metal using Copper sulpahte solution:

A) A block of impure copper

B) A thin sheet pure Copper

C) A block of pure Copper

D) A thin sheet of impure Copper

Question 94

Which of the following metals can be extracted from its compound by Electrolysis only?

A) Gold

B) Zinc

C) Silver

D) Aluminium

 

Question 95

Which of the following ions is most difficult to oxidize?

A) Sulphate ion

B) Chloride ion

C) Potassium ion

D) Copper ion

 

Question 96

The product at cathode in electrolysis of concentrated Sodium chloride solution:

A) Sodium metal

B) Hydrogen gas

C) Chlorine gas

D) Oxygen gas

 

Question 97

The electrolysis of a salt XY₂ gives:

A) Metal X at cathode

B) Metal Y at cathode

C) Metal X at anode

D) Metal T at anode

 

Question 98

During electrolysis of a fused salt:

A) The cations get oxidized at anode

B) The anions get oxidized at cathode

C) The cations get reduced at cathode

D) The anions get reduced at anode

 

Question 99

Two water soluble compounds X  and Y are inserted in an electric circuit and it is observed that X conducts less amount of electricity compared to Y, then:

A) X  is a stronger electrolyte than Y

B) X has more free ion concentration than Y

C) X is a weak electrolyte compared to Y

D) X is a non-electrolyte

 

Question 100

The essential condition for substance to be electrolyzed:

A) must be soluble in water

B) should be an ionic compound

C) should have ions in its solid state

D) must have free ions in its molten state or aqueous solution

Solutions

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