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Chemistry Quiz

Authored by Khôi Đặng

Chemistry

3rd Grade

Chemistry Quiz
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41 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Element X has six more protons than element Y. Which statement must be correct?

Atoms of element Y are smaller than atoms of element X.

Element X has a full shell of electrons.

Element X and element Y are in the same group.

Element X and element Y are in the same period.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement explains why calcium has a higher melting point than barium?

Calcium cations are smaller than barium cations and have a stronger attraction to the delocalised electrons.

The structure of calcium is partly giant molecular.

There are more delocalised electrons in calcium than in barium as it has a lower ionisation energy.

There is greater repulsion between barium atoms as they have more complete electron shells than calcium atoms.

3.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Three statements about potassium and chlorine and their ions are listed. Which statements are correct?

The atomic radius of a potassium atom is greater than the atomic radius of a chlorine atom.

The first ionisation energy of potassium is greater than the first ionisation energy of chlorine.

The ionic radius of a potassium ion is greater than the ionic radius of a chloride ion.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

For which equilibrium do both of the equilibrium constants Kc and Kp have no units?

H2(g) + I2(g) → 2HI(g)

N2(g) + 3H2(g) → 2NH3(g)

N2O4(g) → 2NO2(g)

SO2(g) + O2(g) → SO3(g)

5.

OPEN ENDED QUESTION

3 mins • 1 pt

What is the standard enthalpy change of the reaction shown?

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6.

OPEN ENDED QUESTION

3 mins • 1 pt

In the sodium chloride lattice the number of chloride ions that surround each sodium ion is called the coordination number of the sodium ions. What are the coordination numbers of the sodium ions and the chloride ions in the sodium chloride lattice?

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7.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Histidine is an amino acid. What are the approximate bond angles 1, 2, and 3?

90°107°109.5°

109.5°107°120°

90°120°120°

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