Chemistry Mcqs – (Science) MCQs Latest For FPSC, PPSC, NTS, KPPSC, SPSC & Other Tests
“ Chemistry Mcqs “. Tab this page to check “Latest Chemistry MCQs” for the preparation of competitive mcqs, FPSC mcqs, PPSC mcqs, SPSC mcqs, KPPSC mcqs, AJKPSC mcqs, BPSC mcqs, NTS mcqs, PTS mcqs, OTS mcqs, Atomic Energy mcqs, Pak Army mcqs, Pak Navy mcqs, CTS mcqs, ETEA mcqs and others. The most occurred mcqs of Chemistry in past papers. Past papers of Chemistry mcqs. Past papers of Chemistry MCQs. Chemistry Mcqs are the necessary part of any competitive / job related exams. The Chemistry mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Chemistry mcqs. The Important series of Chemistry Mcqs are given below:
Which of the p-block elements are not representative elements ?
A. Group-14 elements (IV-A)
B. Alkali metals (I-A)
C. Group-18 elements (VIII-A)
D. Halogens (VII-A)
Which of the following will not form crystalline structure with opporitely charged ions_________________?
A. H+
B. Mg2+
C. H-
D. Ca2+
Periodic table provides a basic framework to study elements with respect to their__________________?
A. Chemical properties
B. Physical properties
C. Properties of their compounds
D. All
Concept of Triads was introduced by_______________?
A. Dobereiner
B. Mendeleev
C. Newland
D. Al-Razi
Elements with similar chemical properties appear in the_________________?
A. Same family
B. p block elements
C. Same period
D. Right upper corner
In modern periodic table all the leements are arranged in ascending order of__________________?
A. Atomic mass
B. Valency
C. Atomic number
D. Valence electrons
Inner transition elements are called _________________?
A. Actinides
B. Lanthanides
C. Rare earth metals
D. All
Non-metals usually form _________________ oxides?
A. Acidic
B. Neutral
C. Amphoteric
D. All of the above
Best position of hydrogen in the periodic table is above I.A Group which is mainly due to_______________?
A. Both form ionic compounds
B. Similar outer most shell electronic configuration
C. Both are electropositive
D. All
Which one of the following sets consists of all coinage metals ?
A. Ag Au Hg
B. Cu Ag Au
C. Cu Hg Au
D. Cu Fe Au
Many properties of an element and its compounds can be predicted from the position of the element in the periodic table. What property could not be predicted in this way ?
A. The charge on its ions
B. The nature of its oxides
C. The formula of its oxide
D. Its number of isotopes
The atomic radii decreases by increasing atomic number in________________?
A. Halogens
B. Alkaline earth metal
C. Elements from Li to Ne
D. Alkali metal
An element has electronic conviguration 1s2 2s2 2p2. It belongs to__________________?
A. Group VII-A
B. Group IV-A
C. Group II-A
D. Group VI-A
Which of the following ion is stable in aqueous solution ?
A. H-
B. H+
C. Cl-
D. All are stable
The atoms of same element having same atomic number but different mass number are called____________________?
A. Isomers
B. Isobars
C. Isotopes
D. Isotropes
Which order of ionization energy is correct_________________?
A. Mg S
B. Mg P
C. Mg > A1
D. both B & C
Shielding effect across the period_________________?
A. Decreases
B. Increases
C. Can not be predicted
D. Remains constant
Higher value of electron affinity means__________________?
A. The reason is unknown
B. Atom will gain electron easily
C. Atom may form di-positive ion
D. Atom will lose electron easily
Melting points of VII-A group elements down the group ____________________?
A. Increase
B. Remain constant
C. Decrease
D. No regular trend
Which of the following possesses maximum hydration energy ?
A. K+
B. Na+
C. Mg+2
D. Ca+2
True increasing order of acidity of the oxides of Mn is_________________?
A. MnO2 > MnO > Mn2O7
B. Mn2O7 > MnO2 > MnO
C. MnO < MnO2 < Mn2O7
D. MnO2 > Mn2O7 > MnO
Which one of the following element has highest oxidation state in its compounds ?
A. Sn
B. Mn
C. Cr
D. O
Which of the following cannot exist in solution_________________?
A. O-2
B. Cl-
C. H+
D. Na+
Chemistry Mcqs
An element having low value of ionization energy and low value of electron affinity is likely to belong to__________________?
A. Group IA
B. Group VIIA
C. Group IB
D. Group VIII
Which of the following always increases on going from top to bottom in a group ?
A. Metallic character
B. Oxidizing power
C. Electronegativity
D. Tendency to get reduced
Among halogens the highest boiling point is of___________________?
A. Chlorine
B. Flrorine
C. Bromine
D. Iodine
The scientist who did not contribute in the construction of periodic table ?
A. Moseley
B. Al-Razi
C. Dobereiner
D. Democritus
Which element was not known when Mendeleev proposed his classification ?
A. Sodium
B. Hydrogen
C. Copper
D. Germanium
Noble gases are named so because they are__________________?
A. Zero group elements
B. less reactive
C. Having completely filled valence shell
D. All
The longest period in the modern periodic table is___________________?
A. 6th
B. 5th
C. 2nd and 3rd both
D. 7th
Seventh period contains _________________ normal elements ?
A. 2
B. 6
C. 4
D. 8
Modern periodic table has been divided in ___________ blocks?
A. 8
B. 4
C. 2
D. 7
Amphoteric exides are those which possess ____________ properties?
A. Basic
B. Acidic
C. Acidic and basic
D. Neutral and acidic
Hydrogen resembles with carbon because of having________________?
A. Similar physical state
B. Same number of electrons in the valence shell
C. Remarkable reducing properties
D. Homovalent (show same valency)
In which of the following pairs are elements belonging to the same group ?
A. Magnesium & Aluminium
B. Nitrogen & Phosphorous
C. Boron & Beryllium
D. Gallium & Helium
Which one of the following is not a periodic property ?
A. Boiling point of elements
B. Melting point of elements
C. Ionization energy of elements
D. Coordination number of ions
Which discovery caused a revision in the periodic law as stated by Mendeleev ?
A. X-rays by Roentgen
B. Atomic number by Moseley
C. Location of nucleus by Rutherford
D. Natural radioactivity by Henry Bacquerel.
The property which increases upto group IV-A then decreases on wards_______________?
A. Atomic radii
B. Ionization energy
C. Melting & boiling points
D. Atomic volume
Deuterium reacts with oxygen to form________________?
A. Soft water
B. Heavy water
C. Hard water
D. Water gas
Ionization energy depends upon____________________?
A. Atomic size
B. Nuclear charge
C. Shielding effect
D. I.E depends upon all of the above and nature of orbital
Addition of 2nd electron to a uni negative ion is always____________________?
A. Data is insufficient
B. Endothermic
C. Exothermic
D. Unpredictable
Metallic characters of alkali metals_____________________?
A. Increase down the group
B. No regular trend
C. Decrease down the group
D. Remain same
Oxidation state of an atom represents____________________?
A. Number of electrons lost
B. Number of electrons gained
C. Apparent charge in compound
D. Its vacancies
Halides in which halogen atoms act as a bridge between two atoms of the other element are called___________________?
A. Electronegative halides
B. Covalent halides
C. Polymeric halides
D. Polymeric hydrides
Iodine is solid due to_________________?
A. Large value of dipole moment
B. Strong covalent bond
C. High polarizability
D. Strong hydrogen bonding
Keeping in view the size of atom which order is correct one ?
A. Lu > Ce
B. Ba > Mg
C. Mg > Sr
D. C1 > I
When – COOH is attached directly to the benzene ring the acid is called__________________?
A. Alicyclic
B. Aliphatic
C. Carboxylic
D. Aromatic
The common thing in phthalic acid and oxalic acid is that both are_________________?
A. Hydrocarbons
B. Dicarboxylic
C. Aromatic
D. Strong acids
The acid which is used as ink remover is_________________?
A. Oxalic acid
B. Adipic acid
C. Succinic acid
D. Acetic acid
Which acid is the manufacture of synthetic rubber ?
A. Acetic acid
B. Carbonic acid
C. Formic acid
D. Benzoic acid
In the formation of Zwitter ions proton goes from____________________?
A. Carboxyl to amino group
B. Amino group only
C. Amino to carboxyl group
D. Carboxyl group only
The organic acid that does not has COOH group is___________________?
A. Maleic acid
B. carbolic acid
C. phthalic acid
D. Succinic acid
The test which is used for the identification of amino-acids is_________________?
A. Ninhydrin test
B. Biuretic test
C. Molisch test
D. Benedict test
Carboxylic acid reacts with ammonia to form ammonium salts which on heating produces_______________?
A. CO2
B. Ester
C. Alkane
D. Acidamide
The complete reduction carboxylic acid results in the formation of________________?
A. Alkene
B. Alkyne
C. Alkane
D. Alcohol
Picric acid is_________________?
A. dicarboxylic acid
B. monocarboxylc acid
C. aromatic carboxylic acid
D. none of these
Essential amino acids are___________________?
A. 15
B. 10
C. 5
D. 20
Which of the following is not a fatty acid ?
A. Acetic acid
B. Propanoic acid
C. Phthalic acid
D. Butanoic acid
The basic hydrolysis of ethyl acetate produces__________________?
A. acetic acid
B. ethanol
C. ethanol and acetic acid
D. ethanol and sodium acetate
Which of the following is not an ester_________________?
A. isobutyle formate
B. sodium butyrate
C. amyl acetate
D. octyl acetate
Which of the following has orange flavour__________________?
A. ethyl butyrate
B. octyl acetate
C. isobutyl formate
D. amyl lactate
Amino acids present in cheese___________________?
A. alanine
B. lysine
C. tyrosine
D. proline
Which of the following is an unsaturated carboxylic acid___________________?
A. oxalic acid
B. malonic acid
C. succinic acid
D. maleic acid
The common name of propane 1 3-dioic is_________________?
A. Aromatic acid
B. Oxalic acid
C. Malonic acid
D. Fumaric acid
The irritation caused by red ants bite is due to____________________?
A. Uric acid
B. Formic acid
C. Lactic acid
D. Acetic acid
Which of the following is the strongest acid ?
A. Acetic acid
B. Formic acid
C. Water
D. Propanoic acid
Acidic amino acids have________________?
A. 2 amino groups and 1 carboxylic group
B. 2 amino and 2 carboxylic groups
C. 2 carboxylic groups and 1 amino group
D. 1 amino and 1 carboxylic groups
The term internal salt refers to_____________________?
A. Basic character of amino acids
B. Acidic character of amino acids
C. Dipolar character of amino acids
D. Non-polar structure of amino acids
Which one of the following acids is present in lemon juice ?
A. Citric acid
B. Tartaric acid
C. Benzoic acid
D. Oxalic acid
Which one of following amino acid is neither acidic nor a basic in nature ?
A. Histidine
B. Lysine
C. Proline
D. Glutamic acid
Glycine is the name of an amino acid because___________________?
A. Sweet taste
B. Shining appearance
C. Bitter taste
D. Green colour
The organic acid that can be made from ethanol is_________________?
A. Acetic acid
B. Butanoic acid
C. Formic acid
D. Citric acid
The formula of palmitic acid_________________?
A. C15H31COOH
B. C17H33COOH
C. C13H27COOH
D. C17H35COOH
The aliphatic monocarboxylic acids are obtained by the hydrolysis of________________?
A. fats and proteins
B. proteins and oild
C. fats and oils
D. all above
An acid with unpleasant smell_________________?
A. acetic acid
B. formic acid
C. propionic acid
D. butyric acid
Carboxylic acid on reduction with HI / phosphorous yields_________________?
A. alkane
B. aldehydes
C. alcohols
D. ketones
The reaction of carboxylic acids with alcohols in presence of cone. H2SO4 is called _________________?
A. esterification
B. hydrolysis
C. neutralization
D. saponification
Which of the following is not an amino acids_____________________?
A. aspartic acids
B. lactic acid
C. glumatic acid
D. glycine
Which of the following reaction is not shown by ketones ?
A. reaction with NaHSO3
B. reaction with HCN
C. reaction with 2 4 dinitrophenyl hydrazine
D. reaction with Fehling solution
Which of the following substances does not give iodoform test ?
A. ethyl alcohol
B. acetaldehyde
C. methyl alcohol
D. acetone
Which of the following aldehydes shows rapid reaction with sodium nitroprusside ?
A. accetaldehyde
B. formaldehyde
C. benzaldehyde
D. acetone
Which of the following compounds will react with Tollens reagent ?
A. CH3-CHO
B. CH3-COOH
C. CH3-CH-CH3
D. CH3-CO-CH2-CH3
Cannizzaros reaction is not given by__________________?
A. benzaldehyde
B. acetaldehyde
C. formaldehyde
D. trimethyl acetaldehyde
Ketones are comparatively less reactive than aldehdye. It is due to_______________?
A. steric hindrance
B. alkyl groups are electron donating
C. Both A and B
D. none
Which of the following is not a use of formaldehyde ?
A. in making medicine urotropine
B. in silvery mirror
C. in making throat lozenges
D. in making acetic acid
Which of the following is not a use of acetaldehyde ?
A. formation of mirror
B. formation of phenolic resins
C. antiseptic inhalant
D. formation of throat lozenges
Formaldehyde condenses with phenol in the presence of dilute H2SO4 to yield________________?
A. urotropine
B. Nylon 66
C. Aniline formaldehyde plastic
D. Bakelite
Which of the following will not give addition reaction with NaHSO3________________?
A. CH3CHO
B. HCHO
C. CH3-CH2-CHO
D. None of the above
Which of the following compounds has the empirical formula CH2O and reacts with sodium hydroxide ?
A. ethanol
B. carbonic acid
C. acetic acid
D. methanoic acid
Oxidation of primary alcohol gives________________?
A. Ester
B. Aldehyde
C. Alkene then – COOH
D. ketone
Ncleophilic addition reactions are catalysed__________________?
A. Base
B. Acid
C. Both A and B
D. None
Acetal on acid hydrolysis generates__________________?
A. Ketone
B. Alcohol
C. Both A & B
D. None of the above
Tetrahydroborate ion is the source of_______________?
A. H+
B. proton
C. both A & amp; B
D. H-
Dry distillation of calcium acetate results in the formation of_________________?
A. acetaldehyde
B. formaldehyde
C. methane
D. acetone
Cannizaros reaction takes place through the transfer of ____________________ from complex anion?
A. oxide ion
B. hydride ion
C. hydrogen ion
D. methoxide ion
Iodoform test can be used to distinguish between_________________?
A. acetaldehyde and methanal
B. ethanol and methanol
C. acetone and diethyl ketone
D. all of the above
Which of the following will have the highest boiling point ?
A. ethanal
B. methanol
C. propanal
D. hexanone
The carbon atom of carbonyl group is__________________?
A. cp3 hybridized
B. sp2 hybridized
C. sp hybridized
D. dsp2 hybridized