R4RIN – MCQs, Mock Tests | Chemistry Chemistry MCQ Questions Set-12

The commonly used coolant in refrigerators is

1. Ammonia
2. Nitrogen
3. Freon
4. Oxygen

✅ Correct Answer: 3

Rayon is chemically

1. Glucose
2. Amylase
3. Cellulose
4. Pectin

✅ Correct Answer: 3

Which of the following is an Inert Gas?

1. Hydrogen
2. Nitrogen
3. Oxygen
4. Argon

✅ Correct Answer: 4

Which is the best definition of activation energy?

1. the energy required to break the bonds of reactant molecules
2. the energy required to end a chemical reaction
3. the energy required to bind a substrate to an active site
4. the energy required to re-form bonds in product molecules

✅ Correct Answer: 1

Which of the following is not an allotrope of carbon?

1. Diamond
2. Graphene
3. Ethylene
4. Buckminsterfullerene

✅ Correct Answer: 3

Which formula represents a polar molecule?

1. C-O
2. C-N
3. H-N
4. All of the above

✅ Correct Answer: 4

Which kind of energy is stored in a chemical bond?

1. Potential energy
2. Kinetic energy
3. Both A & B
4. None of the above

✅ Correct Answer: 1

After cleaning the thermometer should be placed in

1. Sanitizer
2. Ice cold water
3. Mercury
4. None of the above

✅ Correct Answer: 1

An ionic bond is formed when

1. sharing of electrons
2. transfer of electrons
3. Both A & B
4. losing of protons

✅ Correct Answer: 2

Anaerobic glycolysis occurs without

1. water
2. glucose
3. oxygen
4. All of the above

✅ Correct Answer: 3

What is the common characteristic of the elements of the same group in the periodic table?

1. Electrons in outer most shell
2. Total number of electrons
3. Total number of protons
4. Atomic weight

✅ Correct Answer: 1

What unit is used to measure weighted average atomic mass?

1. amu
2. gram/mole
3. Both A & B
4. 1/mole

✅ Correct Answer: 3

Which of the following reactions are redox reactions?

1. Ba(s)+Cl2(g)--->BaCl2(s)
2. Mg(s)+Br2(l)--->MgBr2(s)
3. Al(s)+3Ag^+(aq)--->Al^3+(aq)+3Ag(s)
4. All of the above

✅ Correct Answer: 4

Which among the following will be a negative ion?

1. If it has more electrons than protons
2. If it has more electrons than neutrons
3. If it has more protons than electrons
4. If it has more protons than neutrons

✅ Correct Answer: 1

Which of the following is a property of sodium hydroxide?

1. It is insoluble in ether and other Non-polar solvents
2. It is slowly soluble in water
3. It has an odor of rotten egg smell
4. All the above

✅ Correct Answer: 1

Which among the following is used in making liquors medicines and as a fuel in aircrafts?

1. Propyl alcoho
2. Dimethyl alcohol
3. Ethyl alcohol
4. Methyl alcohol

✅ Correct Answer: 3

1 Mole of CO2 mass is

1. 32 gms
2. 44 gms
3. 16 gms
4. 12 gms

✅ Correct Answer: 2

Glycolysis is the conversion of

1. Glucose to pyruvate
2. Glucose to proteins
3. Pyruvate to glucose
4. All the above

✅ Correct Answer: 1

Butter is colloid formed when

1. Proteins are dispersed in water
2. Water is dispersed in fat
3. Fat globules are dispersed in water
4. Carbohydrates are dissolved in water

✅ Correct Answer: 3

An ionic bond involves _____.

1. the sharing of a single pair of electrons
2. an attraction between ions of opposite charge
3. the unequal sharing of an electron pair
4. water avoidance

✅ Correct Answer: 1

Which of the following has the lowest melting point?

1. Zinc
2. Silver
3. Lead
4. Tin

✅ Correct Answer: 4

Non-metals are generally more electronegative due to their:

1. large number of electrons
2. smaller atomic radii
3. smaller atomic number
4. smaller ionization energy

✅ Correct Answer: 2

The main cause of rancidity in foods is the ____ of fats and oils.

1. hydrolysis
2. clarification
3. reduction
4. oxidation

✅ Correct Answer: 4

Which of the following statements is INCORRECT? I) Bleaching powder is a pale yellow powder II) Dry NH3 gas turns red litmus blue III) The pH of rain water is nearly 7 IV) The pH of acid rain is nearly 5.6

1. I II and IV
2. II and III
3. I and IV
4. Only II

✅ Correct Answer: 4

as is used as an illuminating gas

1. Methyl
2. Propane
3. Butene
4. Ethyne

✅ Correct Answer: 2

Which one of the following gases dissolves in water to give acidic solution?

1. Carbon dioxide
2. Oxygen
3. Nitrogen
4. Hydrogen

✅ Correct Answer: 1

Chlorine gas is used in the manufacture of:

1. Baking powder
2. Bleaching powder
3. Baking soda
4. Washing soda

✅ Correct Answer: 2

Through which conversion is energy released?

1. CO2 and H2O to C6H12O6 and O2
2. NADP+ to NADPH
3. ADP to ATP
4. ATP to ADP

✅ Correct Answer: 4

The (O-H) bond in CH3OH is _____.

1. polar covalent
2. ionic
3. non polar covalent
4. cationic

✅ Correct Answer: 1

An example of an extensive property of matter is

1. Volume
2. Mass
3. Density
4. All the above

✅ Correct Answer: 4

Isotopes are atoms of the same element that have different

1. numbers of neutrons
2. numbers of electrons
3. numbers of protons
4. atomic numbers

✅ Correct Answer: 1

Which of the following compounds from nitrites with nitrous acid?

1. Primary amines
2. Secondary amines
3. Tertiary amines
4. All of these

✅ Correct Answer: 4

Hydrogen bonds and hydrophilic interactions are

1. Strong chemical bonds that hold together the atoms within a molecule
2. Weak chemical bonds that hold together the atoms within a molecule
3. Strong chemical bonds that link together separate molecules
4. Weak chemical bonds that link together separate molecules

✅ Correct Answer: 4

Bullet proof material is made up of which polymer?

1. Poly carbonates
2. Poly vinyl
3. Poly amides
4. Polychloride

✅ Correct Answer: 1

Which one of the following statements regarding histone proteins is correct?

1. Histones are proteins that are present in mitochondrial membrane
2. Histones are proteins that are present in nucleus in association with DNA
3. Histones are proteins associated with lipids in the cytosol
4. Histones are proteins associated with carbohydrates in the cytosol

✅ Correct Answer: 2

A feature of catabolic reactions is that they

1. occur only in mitochondria
2. occur only during loss of body weight
3. nvolve release of energy
4. involve consumption of energy

✅ Correct Answer: 3

Which of the following is a property of an acid?

1. Acids reacts with metals
2. Acids taste sour
3. Acids turn blue litmus paper red
4. All the above

✅ Correct Answer: 4

Ammonia can be dried by

1. Sulphuric acid
2. Calcium oxide
3. Phosphorus pentoxide
4. Calcium Chloride

✅ Correct Answer: 4

The PCl5 molecule has trigonal bipyramidal structure. Thereforethe hybridization of p orbitals should be

1. sp2
2. sp3
3. dsp2
4. dsp3

✅ Correct Answer: 4

Removal of oil and grease from sewage [waste water]

1. Skimming
2. Filtration
3. Screening
4. None of the above

✅ Correct Answer: 1

The atomic mass of an element depends upon the

1. number of electrons
2. number of protons
3. number of neutrons
4. All of the above

✅ Correct Answer: 4

Which chemical bond most likely stores the most energy?

1. Single bond
2. Double bond
3. Both A & B
4. None of the above

✅ Correct Answer: 2

PET is a very familiar form of _____________. It is used for making bottles.

1. Nylon
2. Acrylic
3. Polyester
4. Rayon

✅ Correct Answer: 3

Coagulation during water treatment is designed to remove

1. Sand and gravel
2. Bad smells
3. Pathogenic microorganisms
4. Particles suspended in water

✅ Correct Answer: 4

Which subatomic particle has a positive charge?

1. Proton
2. Neutron
3. Electron
4. Ion

✅ Correct Answer: 1

Methyl alcohol and Ethyl alcohol differ in molecular mass by ........ units.

1. 13
2. 14
3. 12
4. 16

✅ Correct Answer: 2

Permanent hardness of water may be removed by the addition of

1. Alum
2. Lime
3. Sodium Carbonate
4. Potassium Permanganate

✅ Correct Answer: 3

Who first discovered the every eighth element had properties similar to that of the first?

1. Newlands
2. Moseley
3. Dobereiner
4. Mendeleev

✅ Correct Answer: 1

Which gas is a source of natural groundwater pollution?

1. Helium
2. Krypton
3. Radon
4. Argon

✅ Correct Answer: 3

Stoichiometry is based on

1. Law of conservation of energy
2. Law of conservation of mass
3. Newtons 1st law
4. Keplers law

✅ Correct Answer: 2