Free MCQs with Answers | Military Brat Defence Academy

QID #24848 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Corrosion?

Correct Answer: A. is gradual deterioration of a material through chemical reactions
Corrosion is gradual deterioration of a material through chemical reactions. The other choices describe different concepts.

Question: Which statement correctly describes Corrosion?

A. is gradual deterioration of a material through chemical reactions

B. is the smallest unit retaining the chemical identity of an element

C. contains atoms with the same atomic number

D. contains elements chemically combined in fixed proportions

Correct Answer: A. is gradual deterioration of a material through chemical reactionsExplanation: Corrosion is gradual deterioration of a material through chemical reactions. The other choices describe different concepts.

View Question WhatsApp Share

QID #24847 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Hard water?

Correct Answer: D. contains appreciable dissolved calcium or magnesium ions
Hard water contains appreciable dissolved calcium or magnesium ions. The other choices describe different concepts.

Question: Which statement correctly describes Hard water?

A. is a macromolecule built from repeating monomer units

B. is a metallic material containing more than one element

C. is gradual deterioration of a material through chemical reactions

D. contains appreciable dissolved calcium or magnesium ions

Correct Answer: D. contains appreciable dissolved calcium or magnesium ionsExplanation: Hard water contains appreciable dissolved calcium or magnesium ions. The other choices describe different concepts.

View Question WhatsApp Share

QID #24846 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Alloy?

Correct Answer: C. is a metallic material containing more than one element
Alloy is a metallic material containing more than one element. The other choices describe different concepts.

Question: Which statement correctly describes Alloy?

A. changes reaction rate without being consumed overall

B. uses electric current to drive a non-spontaneous chemical change

C. is a metallic material containing more than one element

D. involves gain of electrons or decrease in oxidation state

Correct Answer: C. is a metallic material containing more than one elementExplanation: Alloy is a metallic material containing more than one element. The other choices describe different concepts.

View Question WhatsApp Share

QID #24845 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Polymer?

Correct Answer: B. is a macromolecule built from repeating monomer units
Polymer is a macromolecule built from repeating monomer units. The other choices describe different concepts.

Question: Which statement correctly describes Polymer?

A. involves loss of electrons or increase in oxidation state

B. is a macromolecule built from repeating monomer units

C. is a logarithmic measure related to hydrogen-ion activity

D. is reaction of an acid with a base to form salt and water

Correct Answer: B. is a macromolecule built from repeating monomer unitsExplanation: Polymer is a macromolecule built from repeating monomer units. The other choices describe different concepts.

View Question WhatsApp Share

QID #24844 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Electrolysis?

Correct Answer: A. uses electric current to drive a non-spontaneous chemical change
Electrolysis uses electric current to drive a non-spontaneous chemical change. The other choices describe different concepts.

Question: Which statement correctly describes Electrolysis?

A. uses electric current to drive a non-spontaneous chemical change

B. involves sharing of electron pairs between atoms

C. donates protons or increases hydrogen-ion concentration in water

D. accepts protons or increases hydroxide-ion concentration in water

Correct Answer: A. uses electric current to drive a non-spontaneous chemical changeExplanation: Electrolysis uses electric current to drive a non-spontaneous chemical change. The other choices describe different concepts.

View Question WhatsApp Share

QID #24843 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Catalyst?

Correct Answer: D. changes reaction rate without being consumed overall
Catalyst changes reaction rate without being consumed overall. The other choices describe different concepts.

Question: Which statement correctly describes Catalyst?

A. equals the number of protons in an atomic nucleus

B. has the same proton number but a different neutron number

C. forms through electrostatic attraction between oppositely charged ions

D. changes reaction rate without being consumed overall

Correct Answer: D. changes reaction rate without being consumed overallExplanation: Catalyst changes reaction rate without being consumed overall. The other choices describe different concepts.

View Question WhatsApp Share

QID #24842 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Reduction?

Correct Answer: C. involves gain of electrons or decrease in oxidation state
Reduction involves gain of electrons or decrease in oxidation state. The other choices describe different concepts.

Question: Which statement correctly describes Reduction?

A. contains elements chemically combined in fixed proportions

B. contains substances physically combined in variable proportions

C. involves gain of electrons or decrease in oxidation state

D. contains atoms with the same atomic number

Correct Answer: C. involves gain of electrons or decrease in oxidation stateExplanation: Reduction involves gain of electrons or decrease in oxidation state. The other choices describe different concepts.

View Question WhatsApp Share

QID #24841 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Oxidation?

Correct Answer: B. involves loss of electrons or increase in oxidation state
Oxidation involves loss of electrons or increase in oxidation state. The other choices describe different concepts.

Question: Which statement correctly describes Oxidation?

A. is the smallest unit retaining the chemical identity of an element

B. involves loss of electrons or increase in oxidation state

C. contains appreciable dissolved calcium or magnesium ions

D. is gradual deterioration of a material through chemical reactions

Correct Answer: B. involves loss of electrons or increase in oxidation stateExplanation: Oxidation involves loss of electrons or increase in oxidation state. The other choices describe different concepts.

View Question WhatsApp Share

QID #24840 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Neutralization?

Correct Answer: A. is reaction of an acid with a base to form salt and water
Neutralization is reaction of an acid with a base to form salt and water. The other choices describe different concepts.

Question: Which statement correctly describes Neutralization?

A. is reaction of an acid with a base to form salt and water

B. uses electric current to drive a non-spontaneous chemical change

C. is a macromolecule built from repeating monomer units

D. is a metallic material containing more than one element

Correct Answer: A. is reaction of an acid with a base to form salt and waterExplanation: Neutralization is reaction of an acid with a base to form salt and water. The other choices describe different concepts.

View Question WhatsApp Share

QID #24839 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes pH?

Correct Answer: D. is a logarithmic measure related to hydrogen-ion activity
pH is a logarithmic measure related to hydrogen-ion activity. The other choices describe different concepts.

Question: Which statement correctly describes pH?

A. involves loss of electrons or increase in oxidation state

B. involves gain of electrons or decrease in oxidation state

C. changes reaction rate without being consumed overall

D. is a logarithmic measure related to hydrogen-ion activity

Correct Answer: D. is a logarithmic measure related to hydrogen-ion activityExplanation: pH is a logarithmic measure related to hydrogen-ion activity. The other choices describe different concepts.

View Question WhatsApp Share

QID #24838 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Base?

Correct Answer: C. accepts protons or increases hydroxide-ion concentration in water
Base accepts protons or increases hydroxide-ion concentration in water. The other choices describe different concepts.

Question: Which statement correctly describes Base?

A. is a logarithmic measure related to hydrogen-ion activity

B. is reaction of an acid with a base to form salt and water

C. accepts protons or increases hydroxide-ion concentration in water

D. donates protons or increases hydrogen-ion concentration in water

Correct Answer: C. accepts protons or increases hydroxide-ion concentration in waterExplanation: Base accepts protons or increases hydroxide-ion concentration in water. The other choices describe different concepts.

View Question WhatsApp Share

QID #24837 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Acid?

Correct Answer: B. donates protons or increases hydrogen-ion concentration in water
Acid donates protons or increases hydrogen-ion concentration in water. The other choices describe different concepts.

Question: Which statement correctly describes Acid?

A. involves sharing of electron pairs between atoms

B. donates protons or increases hydrogen-ion concentration in water

C. has the same proton number but a different neutron number

D. forms through electrostatic attraction between oppositely charged ions

Correct Answer: B. donates protons or increases hydrogen-ion concentration in waterExplanation: Acid donates protons or increases hydrogen-ion concentration in water. The other choices describe different concepts.

View Question WhatsApp Share

QID #24836 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Covalent bond?

Correct Answer: A. involves sharing of electron pairs between atoms
Covalent bond involves sharing of electron pairs between atoms. The other choices describe different concepts.

Question: Which statement correctly describes Covalent bond?

A. involves sharing of electron pairs between atoms

B. contains elements chemically combined in fixed proportions

C. contains substances physically combined in variable proportions

D. equals the number of protons in an atomic nucleus

Correct Answer: A. involves sharing of electron pairs between atomsExplanation: Covalent bond involves sharing of electron pairs between atoms. The other choices describe different concepts.

View Question WhatsApp Share

QID #24835 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Ionic bond?

Correct Answer: D. forms through electrostatic attraction between oppositely charged ions
Ionic bond forms through electrostatic attraction between oppositely charged ions. The other choices describe different concepts.

Question: Which statement correctly describes Ionic bond?

A. is gradual deterioration of a material through chemical reactions

B. is the smallest unit retaining the chemical identity of an element

C. contains atoms with the same atomic number

D. forms through electrostatic attraction between oppositely charged ions

Correct Answer: D. forms through electrostatic attraction between oppositely charged ionsExplanation: Ionic bond forms through electrostatic attraction between oppositely charged ions. The other choices describe different concepts.

View Question WhatsApp Share

QID #24834 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Isotope?

Correct Answer: C. has the same proton number but a different neutron number
Isotope has the same proton number but a different neutron number. The other choices describe different concepts.

Question: Which statement correctly describes Isotope?

A. is a metallic material containing more than one element

B. contains appreciable dissolved calcium or magnesium ions

C. has the same proton number but a different neutron number

D. is a macromolecule built from repeating monomer units

Correct Answer: C. has the same proton number but a different neutron numberExplanation: Isotope has the same proton number but a different neutron number. The other choices describe different concepts.

View Question WhatsApp Share

QID #24833 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Atomic number?

Correct Answer: B. equals the number of protons in an atomic nucleus
Atomic number equals the number of protons in an atomic nucleus. The other choices describe different concepts.

Question: Which statement correctly describes Atomic number?

A. uses electric current to drive a non-spontaneous chemical change

B. equals the number of protons in an atomic nucleus

C. involves gain of electrons or decrease in oxidation state

D. changes reaction rate without being consumed overall

Correct Answer: B. equals the number of protons in an atomic nucleusExplanation: Atomic number equals the number of protons in an atomic nucleus. The other choices describe different concepts.

View Question WhatsApp Share

QID #24832 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Mixture?

Correct Answer: A. contains substances physically combined in variable proportions
Mixture contains substances physically combined in variable proportions. The other choices describe different concepts.

Question: Which statement correctly describes Mixture?

A. contains substances physically combined in variable proportions

B. is a logarithmic measure related to hydrogen-ion activity

C. is reaction of an acid with a base to form salt and water

D. involves loss of electrons or increase in oxidation state

Correct Answer: A. contains substances physically combined in variable proportionsExplanation: Mixture contains substances physically combined in variable proportions. The other choices describe different concepts.

View Question WhatsApp Share

QID #24831 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Compound?

Correct Answer: D. contains elements chemically combined in fixed proportions
Compound contains elements chemically combined in fixed proportions. The other choices describe different concepts.

Question: Which statement correctly describes Compound?

A. involves sharing of electron pairs between atoms

B. donates protons or increases hydrogen-ion concentration in water

C. accepts protons or increases hydroxide-ion concentration in water

D. contains elements chemically combined in fixed proportions

Correct Answer: D. contains elements chemically combined in fixed proportionsExplanation: Compound contains elements chemically combined in fixed proportions. The other choices describe different concepts.

View Question WhatsApp Share

QID #24830 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Element?

Correct Answer: C. contains atoms with the same atomic number
Element contains atoms with the same atomic number. The other choices describe different concepts.

Question: Which statement correctly describes Element?

A. has the same proton number but a different neutron number

B. forms through electrostatic attraction between oppositely charged ions

C. contains atoms with the same atomic number

D. equals the number of protons in an atomic nucleus

Correct Answer: C. contains atoms with the same atomic numberExplanation: Element contains atoms with the same atomic number. The other choices describe different concepts.

View Question WhatsApp Share

QID #24829 AIIMS UPPSC Health Education Officer (HEO) 2026 Mock Test Series Bilingual General Science Chemistry Easy

Which statement correctly describes Atom?

Correct Answer: B. is the smallest unit retaining the chemical identity of an element
Atom is the smallest unit retaining the chemical identity of an element. The other choices describe different concepts.

Question: Which statement correctly describes Atom?

A. contains substances physically combined in variable proportions

B. is the smallest unit retaining the chemical identity of an element

C. contains atoms with the same atomic number

D. contains elements chemically combined in fixed proportions

Correct Answer: B. is the smallest unit retaining the chemical identity of an elementExplanation: Atom is the smallest unit retaining the chemical identity of an element. The other choices describe different concepts.

View Question WhatsApp Share

Free MCQs with Answers | Military Brat Defence Academy

Which statement correctly describes Corrosion?

Which statement correctly describes Hard water?

Which statement correctly describes Alloy?

Which statement correctly describes Polymer?

Which statement correctly describes Electrolysis?

Which statement correctly describes Catalyst?

Which statement correctly describes Reduction?

Which statement correctly describes Oxidation?

Which statement correctly describes Neutralization?

Which statement correctly describes pH?

Which statement correctly describes Base?

Which statement correctly describes Acid?

Which statement correctly describes Covalent bond?

Which statement correctly describes Ionic bond?

Which statement correctly describes Isotope?

Which statement correctly describes Atomic number?

Which statement correctly describes Mixture?

Which statement correctly describes Compound?

Which statement correctly describes Element?

Which statement correctly describes Atom?

Free MCQs with Answers and Explanations