Science Practice Quiz 37

Q1.How many electrons are present in the L shell of an oxygen atom?

A. Two B. Four C. Six D. Eight

Q2.How many additional electrons does an atom of oxygen require to complete its octet?

A. One B. Two C. Three D. Four

Q3.What constitutes a double bond between two atoms?

A. One shared pair of electrons B. Two shared pairs of electrons C. Three shared pairs of electrons D. Four shared pairs of electrons

Q4.How many shared pairs of electrons constitute a triple bond between two atoms?

A. One B. Two C. Three D. Four

Q5.Which of the following is a major component of bio-gas and Compressed Natural Gas (CNG)?

A. Ethane B. Propane C. Butane D. Methane

Q6.What is the chemical formula for methane?

A. C2H6 B. CH4 C. C3H8 D. C4H10

Q7.What is the valency of carbon?

A. Monovalent B. Divalent C. Trivalent D. Tetravalent

Q8.Bonds formed by the sharing of an electron pair between two atoms are known as what?

A. Ionic bonds B. Metallic bonds C. Covalent bonds D. Hydrogen bonds

Q9.Which of the following statements is true regarding covalently bonded molecules?

A. They have weak bonds within the molecule. B. They have strong intermolecular forces. C. They generally have low melting and boiling points. D. They are formed by the transfer of electrons.

Q10.Which of the following statements about diamond is correct according to the provided text?

A. It is a good conductor of electricity. B. It is smooth and slippery. C. It is the hardest substance known. D. Its chemical properties are different from graphite.

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Science Practice Quiz 37