Science MCQs

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Total Questions

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Question 761 Hard

Which of the following elements will form an ion with a +2 charge?

Potassium (K)

Magnesium (Mg)

Aluminum (Al)

Oxygen (O)

Question 762 Hard

The formula for Sulphuric Acid is:

H₂SO₃

H₂SO₄

HSO₄

SO₄

Question 763 Hard

What is the valency of the chromic ion (Cr³⁺)?

Question 764 Hard

The chemical formula for a compound tells us about the:

Type of bond

State of matter

Number and type of atoms in a molecule

All of the above

Question 765 Medium

Which type of bond is formed by the mutual sharing of electrons?

Ionic bond

Covalent bond

Proton bond

Neutron bond

Question 766 Medium

What is the valency of nitrogen in ammonia (NH₃)?

Question 767 Medium

Which of the following pairs is most likely to form an ionic compound?

Sodium and Chlorine

Hydrogen and Oxygen

Nitrogen and Hydrogen

Carbon and Oxygen

Question 768 Medium

What is the correct chemical formula for Aluminum Chloride?

AlCl

AlCl₂

AlCl₃

Al₃Cl

Question 769 Medium

Which noble gas configuration does a chloride ion (Cl⁻) achieve?

Helium

Neon

Argon

Krypton

Question 770 Medium

What is the charge on the ammonium ion?

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Total Questions 10900

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medium 2983

hard 2120

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