IB Chemistry Paper 1

What is the sum of the coefficients when the equation is balanced with whole numbers?

—C₈H₁₈ (g) + —O₂ (g) → —CO (g) + —H₂O(l)

• 26.5

• 30

• 53

• 61

What is the maximum volume, in dm³, of CO₂ (g) produced when 1.00 g of CaCO₃ (s) reacts with

20.0cm³ of 2.00mol dm^-3 HCl(aq)?

CaCO₃ (s) + 2HCl (aq) → CaCl₂ (aq) + H₂O (l) + CO2 (g)

Molar volume of gas = 22.7 dm³ mol^-1;

Mr (CaCO₃) = 100.00

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Tags

NGSS.HS-PS1-7

Which factors affect the molar volume of an ideal gas?

I. Pressure

II. Temperature

III. Empirical formula

• I and II only

• I and III only

• II and III only

• I, II and III

Which electron transition emits radiation of the longest wavelength?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-2

NGSS.HS-PS4-1

NGSS.HS-PS4-3

X, Y and Z represent the successive elements, Ne, Na and Mg, but not necessarily in that order.

What is the order of increasing atomic number?

• X<Y<Z

• X<Z<Y

• Y<Z<X

• Y<X<Z

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which property increases down Group 1, the alkali metals?

• Atomic radius

• Electronegativity

• First ionization energy

• Melting point

Which element is a lanthanide?

• Hf

• Tb

• U

• Y

How many bonding electrons are there in the urea molecule?

• 8

• 16

• 20

• 24

Tags

NGSS.HS-PS1-4

Which does not show resonance?

• PO₄^3-

• C₆H₆

• C₆H₁₂

• O₃

Which metal has the strongest metallic bond?

• Li

• Na

• K

• Rb