The branch of Chemistry which deals with hydrocarbons:

Organic chemistry is the branch that deals with hydrocarbons.

The atomic mass of an element expressed in gram is:

The atomic mass of an element expressed in grams is called gram atomic mass.

Which of the following can be separated by physical means?

Mixtures can be separated by physical means.

The molar mass of H₂SO₄ is:

To find the molar mass of H₂SO₄ we need to sum up the atomic masses of each element in the compound. For sulfuric acid H₂SO₄: Atomic mass of hydrogen (H): 1 g/mol, sulfur (S): 32 g/mol, oxygen (O): 16 g/mol. So, molar mass of H₂SO₄ = (2×1 + 32 + 4×16) g/mol = 98 g/mol.

The Molecule consist of two atoms is:

A molecule consisting of two atoms is called a diatomic molecule.

A formula that indicates actual number and type of atoms in a molecule is called:

A molecular formula indicates the actual number and type of atoms in a molecule.

Ethyl alcohol was prepared by:

Ethyl alcohol was prepared by Al-Razi.

Which of the following is a homo atomic molecule:

H₂ is a homo atomic molecule as it contains only one type of atom.

The Empirical formula of hydrogen peroxide (H₂O₂) is:

The empirical formula of hydrogen peroxide (H₂O₂) is HO.

A piece of matter in pure form is termed as:

A piece of matter in pure form is termed as a substance.

Who proposed the idea of an atom as an indivisible particle of matter?

Democritus proposed the idea of an atom as an indivisible particle of matter.

Which Muslim scientist invented experimental methods for nitric acid and hydrochloric acid?

Jabir Ibne-Haiyan invented experimental methods for nitric acid and hydrochloric acid.

Who proposed Avogadro's Law?

Avogadro proposed Avogadro's Law.

Who discovered the periodic arrangement of elements?

Mendeleev discovered the periodic arrangement of elements.

The study of compounds in living organisms is part of:

Biochemistry is the study of compounds in living organisms.

Which branch focuses on the design of products with less hazardous substances?

Green Chemistry focuses on the design of products with less hazardous substances.

The study of radioactivity and nuclear processes is part of:

Nuclear Chemistry deals with radioactivity and nuclear processes.

Which branch deals with the separation and analysis of substances?

Analytical Chemistry deals with the separation and analysis of substances.

Matter is defined as anything that has:

Matter is defined as anything that has mass and occupies space.

The smallest particle of an element is called:

The smallest particle of an element is called an atom.

Which of the following is a pure substance?

Diamond is a pure substance.

A mixture in which substances are not uniformly mixed is called:

A heterogeneous mixture is one where substances are not uniformly mixed.

An atom or group of atoms with a positive charge is called:

A cation is an atom or group of atoms with a positive charge.

A molecule that has gained or lost electrons is called:

A molecular ion is a molecule that has gained or lost electrons.

Free radicals are characterized by having:

Free radicals are characterized by having unpaired electrons.

Which of the following is a molecular ion?

CH₄⁺ is a molecular ion.

An example of a free radical is:

H₃C° is an example of a free radical.

The formula showing the simplest ratio of atoms in a molecule is called:

The empirical formula shows the simplest ratio of atoms in a molecule.

The empirical formula of benzene (C₆H₆) is:

The empirical formula of benzene (C₆H₆) is CH.

Balancing a chemical equation ensures the law of:

Balancing a chemical equation ensures the law of conservation of mass.

In the equation 2H₂ + O₂ → 2H₂O, the coefficient of O₂ is:

In the equation 2H₂ + O₂ → 2H₂O, the coefficient of O₂ is 1.

Avogadro's number is approximately:

Avogadro's number is approximately 6.02 × 10²³.

The number of moles in 40g of sodium (Na) is:

The number of moles in 40g of sodium (Na) is 1.73.

The volume occupied by 1 mole of gas at STP is:

The volume occupied by 1 mole of gas at STP is 22.4 dm³.

The mass of 4 moles of CO₂ is:

The mass of 4 moles of CO₂ is 176g.

The formula mass of NaCl is:

The formula mass of NaCl is 58.5 a.m.u.

The number of atoms in 9.2g of calcium (Ca) is:

The number of atoms in 9.2g of calcium (Ca) is 1.38 × 10²³

The number of molecules in 8g of glucose (C₆H₁₂O₆) is:

The number of molecules in 8g of glucose (C₆H₁₂O₆) is 2.40 ×10²²

The number of moles in 30g of H₃PO₄ is:

The number of moles in 30g of H₃PO₄ is 0.31.

Which of the following is NOT a state of matter?

Energy is not a state of matter.

The valency of oxygen is:

The valency of oxygen is -2.

The symbol for potassium is

The symbol for potassium is (K)

Which of the following is a heteroatomic molecule?

H₂O is a heteroatomic molecule.

The empirical formula of glucose (C₆H₁₂O₆) is:

Which chemical is used to kill pathogenic organisms in water?

Chlorine is used to kill pathogenic organisms in water.

The production of fertilizers is part of:

The production of fertilizers is part of Industrial Chemistry.

Which branch of chemistry deals with relationship between composition and physical properties of matter?

Physical Chemistry deals with the relationship between composition and physical properties of matter.

The study of material interactions in the environment is part of:

The study of material interactions in the environment is part of Environmental Chemistry.

Which of the following is an example of green chemistry?

Polyphenylsulfone is an example of green chemistry.

Who proposed the wave-particle duality of electrons?

De Broglie proposed the wave-particle duality of electrons.

The fourth state of matter is:

The fourth state of matter is plasma.

The synthesis of the first Bose-Einstein condensate was achieved by:

The synthesis of the first Bose-Einstein condensate was achieved by Carl Wieman.

The acid-base theory was proposed by:

The acid-base theory was proposed by Arrhenius.

The nuclear structure of the atom was postulated by:

The nuclear structure of the atom was postulated by Rutherford.