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UPPSC Health Education Officer (HEO) 2026 Mock Test Series with Answers | Military Brat Defence Academy
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Series: UPPSC Health Education Officer (HEO) 2026 Mock Test Series
QID #24878
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Which pair involving Base is correctly matched?
A
Base — accepts protons or increases hydroxide-ion concentration in water
B
Alloy — contains appreciable dissolved calcium or magnesium ions
C
Hard water — is gradual deterioration of a material through chemical reactions
D
Corrosion — is a metallic material containing more than one element
Correct Answer: A. Base — accepts protons or increases hydroxide-ion concentration in water
Question: Which pair involving Base is correctly matched?
A. Base — accepts protons or increases hydroxide-ion concentration in water
B. Alloy — contains appreciable dissolved calcium or magnesium ions
C. Hard water — is gradual deterioration of a material through chemical reactions
D. Corrosion — is a metallic material containing more than one element
Correct Answer: A. Base — accepts protons or increases hydroxide-ion concentration in water
Explanation: Base accepts protons or increases hydroxide-ion concentration in water. The other choices describe different concepts.
QID #24877
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Which pair involving Acid is correctly matched?
A
Catalyst — uses electric current to drive a non-spontaneous chemical change
B
Electrolysis — is a macromolecule built from repeating monomer units
C
Polymer — changes reaction rate without being consumed overall
D
Acid — donates protons or increases hydrogen-ion concentration in water
Correct Answer: D. Acid — donates protons or increases hydrogen-ion concentration in water
Question: Which pair involving Acid is correctly matched?
A. Catalyst — uses electric current to drive a non-spontaneous chemical change
B. Electrolysis — is a macromolecule built from repeating monomer units
C. Polymer — changes reaction rate without being consumed overall
D. Acid — donates protons or increases hydrogen-ion concentration in water
Correct Answer: D. Acid — donates protons or increases hydrogen-ion concentration in water
Explanation: Acid donates protons or increases hydrogen-ion concentration in water. The other choices describe different concepts.
QID #24876
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Which pair involving Covalent bond is correctly matched?
A
Oxidation — involves gain of electrons or decrease in oxidation state
B
Reduction — is reaction of an acid with a base to form salt and water
C
Covalent bond — involves sharing of electron pairs between atoms
D
Neutralization — involves loss of electrons or increase in oxidation state
Correct Answer: C. Covalent bond — involves sharing of electron pairs between atoms
Question: Which pair involving Covalent bond is correctly matched?
A. Oxidation — involves gain of electrons or decrease in oxidation state
B. Reduction — is reaction of an acid with a base to form salt and water
C. Covalent bond — involves sharing of electron pairs between atoms
D. Neutralization — involves loss of electrons or increase in oxidation state
Correct Answer: C. Covalent bond — involves sharing of electron pairs between atoms
Explanation: Covalent bond involves sharing of electron pairs between atoms. The other choices describe different concepts.
QID #24875
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Which pair involving Ionic bond is correctly matched?
A
pH — donates protons or increases hydrogen-ion concentration in water
B
Ionic bond — forms through electrostatic attraction between oppositely charged ions
C
Acid — accepts protons or increases hydroxide-ion concentration in water
D
Base — is a logarithmic measure related to hydrogen-ion activity
Correct Answer: B. Ionic bond — forms through electrostatic attraction between oppositely charged ions
Question: Which pair involving Ionic bond is correctly matched?
A. pH — donates protons or increases hydrogen-ion concentration in water
B. Ionic bond — forms through electrostatic attraction between oppositely charged ions
C. Acid — accepts protons or increases hydroxide-ion concentration in water
D. Base — is a logarithmic measure related to hydrogen-ion activity
Correct Answer: B. Ionic bond — forms through electrostatic attraction between oppositely charged ions
Explanation: Ionic bond forms through electrostatic attraction between oppositely charged ions. The other choices describe different concepts.
QID #24874
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Which pair involving Isotope is correctly matched?
A
Isotope — has the same proton number but a different neutron number
B
Atomic number — forms through electrostatic attraction between oppositely charged ions
C
Ionic bond — involves sharing of electron pairs between atoms
D
Covalent bond — equals the number of protons in an atomic nucleus
Correct Answer: A. Isotope — has the same proton number but a different neutron number
Question: Which pair involving Isotope is correctly matched?
A. Isotope — has the same proton number but a different neutron number
B. Atomic number — forms through electrostatic attraction between oppositely charged ions
C. Ionic bond — involves sharing of electron pairs between atoms
D. Covalent bond — equals the number of protons in an atomic nucleus
Correct Answer: A. Isotope — has the same proton number but a different neutron number
Explanation: Isotope has the same proton number but a different neutron number. The other choices describe different concepts.
QID #24873
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Which pair involving Atomic number is correctly matched?
A
Element — contains elements chemically combined in fixed proportions
B
Compound — contains substances physically combined in variable proportions
C
Mixture — contains atoms with the same atomic number
D
Atomic number — equals the number of protons in an atomic nucleus
Correct Answer: D. Atomic number — equals the number of protons in an atomic nucleus
Question: Which pair involving Atomic number is correctly matched?
A. Element — contains elements chemically combined in fixed proportions
B. Compound — contains substances physically combined in variable proportions
C. Mixture — contains atoms with the same atomic number
D. Atomic number — equals the number of protons in an atomic nucleus
Correct Answer: D. Atomic number — equals the number of protons in an atomic nucleus
Explanation: Atomic number equals the number of protons in an atomic nucleus. The other choices describe different concepts.
QID #24872
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Which pair involving Mixture is correctly matched?
A
Corrosion — is the smallest unit retaining the chemical identity of an element
B
Atom — contains appreciable dissolved calcium or magnesium ions
C
Mixture — contains substances physically combined in variable proportions
D
Hard water — is gradual deterioration of a material through chemical reactions
Correct Answer: C. Mixture — contains substances physically combined in variable proportions
Question: Which pair involving Mixture is correctly matched?
A. Corrosion — is the smallest unit retaining the chemical identity of an element
B. Atom — contains appreciable dissolved calcium or magnesium ions
C. Mixture — contains substances physically combined in variable proportions
D. Hard water — is gradual deterioration of a material through chemical reactions
Correct Answer: C. Mixture — contains substances physically combined in variable proportions
Explanation: Mixture contains substances physically combined in variable proportions. The other choices describe different concepts.
QID #24871
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Which pair involving Compound is correctly matched?
A
Alloy — uses electric current to drive a non-spontaneous chemical change
B
Compound — contains elements chemically combined in fixed proportions
C
Electrolysis — is a macromolecule built from repeating monomer units
D
Polymer — is a metallic material containing more than one element
Correct Answer: B. Compound — contains elements chemically combined in fixed proportions
Question: Which pair involving Compound is correctly matched?
A. Alloy — uses electric current to drive a non-spontaneous chemical change
B. Compound — contains elements chemically combined in fixed proportions
C. Electrolysis — is a macromolecule built from repeating monomer units
D. Polymer — is a metallic material containing more than one element
Correct Answer: B. Compound — contains elements chemically combined in fixed proportions
Explanation: Compound contains elements chemically combined in fixed proportions. The other choices describe different concepts.
QID #24870
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Which pair involving Element is correctly matched?
A
Element — contains atoms with the same atomic number
B
Oxidation — involves gain of electrons or decrease in oxidation state
C
Reduction — changes reaction rate without being consumed overall
D
Catalyst — involves loss of electrons or increase in oxidation state
Correct Answer: A. Element — contains atoms with the same atomic number
Question: Which pair involving Element is correctly matched?
A. Element — contains atoms with the same atomic number
B. Oxidation — involves gain of electrons or decrease in oxidation state
C. Reduction — changes reaction rate without being consumed overall
D. Catalyst — involves loss of electrons or increase in oxidation state
Correct Answer: A. Element — contains atoms with the same atomic number
Explanation: Element contains atoms with the same atomic number. The other choices describe different concepts.
QID #24869
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Which pair involving Atom is correctly matched?
A
Base — is a logarithmic measure related to hydrogen-ion activity
B
pH — is reaction of an acid with a base to form salt and water
C
Neutralization — accepts protons or increases hydroxide-ion concentration in water
D
Atom — is the smallest unit retaining the chemical identity of an element
Correct Answer: D. Atom — is the smallest unit retaining the chemical identity of an element
Question: Which pair involving Atom is correctly matched?
A. Base — is a logarithmic measure related to hydrogen-ion activity
B. pH — is reaction of an acid with a base to form salt and water
C. Neutralization — accepts protons or increases hydroxide-ion concentration in water
D. Atom — is the smallest unit retaining the chemical identity of an element
Correct Answer: D. Atom — is the smallest unit retaining the chemical identity of an element
Explanation: Atom is the smallest unit retaining the chemical identity of an element. The other choices describe different concepts.
QID #24868
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Identify the term that is gradual deterioration of a material through chemical reactions.
A
Atomic number
B
Isotope
C
Ionic bond
D
Corrosion
Correct Answer: D. Corrosion
Question: Identify the term that is gradual deterioration of a material through chemical reactions.
A. Atomic number
B. Isotope
C. Ionic bond
D. Corrosion
Correct Answer: D. Corrosion
Explanation: Corrosion is gradual deterioration of a material through chemical reactions. The other choices describe different concepts.
QID #24867
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Identify the term that contains appreciable dissolved calcium or magnesium ions.
A
Compound
B
Mixture
C
Hard water
D
Element
Correct Answer: C. Hard water
Question: Identify the term that contains appreciable dissolved calcium or magnesium ions.
A. Compound
B. Mixture
C. Hard water
D. Element
Correct Answer: C. Hard water
Explanation: Hard water contains appreciable dissolved calcium or magnesium ions. The other choices describe different concepts.
QID #24866
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Identify the term that is a metallic material containing more than one element.
A
Atom
B
Alloy
C
Hard water
D
Corrosion
Correct Answer: B. Alloy
Question: Identify the term that is a metallic material containing more than one element.
A. Atom
B. Alloy
C. Hard water
D. Corrosion
Correct Answer: B. Alloy
Explanation: Alloy is a metallic material containing more than one element. The other choices describe different concepts.
QID #24865
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Identify the term that is a macromolecule built from repeating monomer units. Choose the best answer for Test 13.
A
Polymer
B
Catalyst
C
Electrolysis
D
Alloy
Correct Answer: A. Polymer
Question: Identify the term that is a macromolecule built from repeating monomer units. Choose the best answer for Test 13.
A. Polymer
B. Catalyst
C. Electrolysis
D. Alloy
Correct Answer: A. Polymer
Explanation: Polymer is a macromolecule built from repeating monomer units. The other choices describe different concepts.
QID #24864
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Identify the term that uses electric current to drive a non-spontaneous chemical change. Choose the best answer for Test 13.
A
Neutralization
B
Oxidation
C
Reduction
D
Electrolysis
Correct Answer: D. Electrolysis
Question: Identify the term that uses electric current to drive a non-spontaneous chemical change. Choose the best answer for Test 13.
A. Neutralization
B. Oxidation
C. Reduction
D. Electrolysis
Correct Answer: D. Electrolysis
Explanation: Electrolysis uses electric current to drive a non-spontaneous chemical change. The other choices describe different concepts.
QID #24863
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Identify the term that changes reaction rate without being consumed overall.
A
Base
B
pH
C
Catalyst
D
Acid
Correct Answer: C. Catalyst
Question: Identify the term that changes reaction rate without being consumed overall.
A. Base
B. pH
C. Catalyst
D. Acid
Correct Answer: C. Catalyst
Explanation: Catalyst changes reaction rate without being consumed overall. The other choices describe different concepts.
QID #24862
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Identify the term that involves gain of electrons or decrease in oxidation state.
A
Covalent bond
B
Reduction
C
Isotope
D
Ionic bond
Correct Answer: B. Reduction
Question: Identify the term that involves gain of electrons or decrease in oxidation state.
A. Covalent bond
B. Reduction
C. Isotope
D. Ionic bond
Correct Answer: B. Reduction
Explanation: Reduction involves gain of electrons or decrease in oxidation state. The other choices describe different concepts.
QID #24861
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Identify the term that involves loss of electrons or increase in oxidation state.
A
Oxidation
B
Compound
C
Mixture
D
Atomic number
Correct Answer: A. Oxidation
Question: Identify the term that involves loss of electrons or increase in oxidation state.
A. Oxidation
B. Compound
C. Mixture
D. Atomic number
Correct Answer: A. Oxidation
Explanation: Oxidation involves loss of electrons or increase in oxidation state. The other choices describe different concepts.
QID #24860
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Identify the term that is reaction of an acid with a base to form salt and water.
A
Corrosion
B
Atom
C
Element
D
Neutralization
Correct Answer: D. Neutralization
Question: Identify the term that is reaction of an acid with a base to form salt and water.
A. Corrosion
B. Atom
C. Element
D. Neutralization
Correct Answer: D. Neutralization
Explanation: Neutralization is reaction of an acid with a base to form salt and water. The other choices describe different concepts.
QID #24859
AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series General Science Chemistry Easy
Identify the term that is a logarithmic measure related to hydrogen-ion activity. Choose the best answer for Test 13.
A
Alloy
B
Hard water
C
pH
D
Polymer
Correct Answer: C. pH
Question: Identify the term that is a logarithmic measure related to hydrogen-ion activity. Choose the best answer for Test 13.
A. Alloy
B. Hard water
C. pH
D. Polymer
Correct Answer: C. pH
Explanation: pH is a logarithmic measure related to hydrogen-ion activity. The other choices describe different concepts.
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