Zadania z chemii IB HL

What are the oxidation states of the elements in $\ce{K2MnO4}$? A. K: +1, Mn: +6, O: −2 B. K: +1, Mn: +7, O: −2 C. K: +2, Mn: +4, O: −2 D. K: +1, Mn: +6, O: −1

Which oxide reacts with water to give a solution with a pH greater than 7? A. $\ce{SO2}$ B. $\ce{P4O10}$ C. $\ce{Al2O3}$ D. $\ce{Na2O}$

Which statement is correct for the group 17 elements from chlorine to iodine? A. The first ionization energy of the elements decreases. B. The elements become stronger oxidizing agents. C. The elements become more volatile. D. The radius of the halide ion…

Aqueous nickel(II) ions, $\ce{[Ni(H2O)6]^2+}$, appear green. Which statements correctly account for this colour? I. Red light is absorbed when an electron is promoted from the lower to the higher set of split d-orbitals. II. Green light is emitted when…

Which ion is likely to form a coloured aqueous solution, based on its electron configuration? A. $\ce{Ag+}$ B. $\ce{Ti^4+}$ C. $\ce{Cd^2+}$ D. $\ce{Cr^3+}$

Which of these alkanes boils at the lowest temperature? A. $\ce{CH3CH2CH2CH2CH3}$ B. $\ce{C(CH3)4}$ C. $\ce{(CH3)2CHCH2CH3}$ D. $\ce{CH3CH2CH2CH2CH2CH3}$

Which molecule contains a chiral centre? A. $\ce{CH3CH(NH2)COOH}$ B. $\ce{(CH3)2CHCOOH}$ C. $\ce{CH3CH2CH(CH3)CH2CH3}$ D. $\ce{ClCH2CH(OH)CH2Cl}$

Which of the following compounds show stereoisomerism? I. $\ce{CH3CH=CHCH3}$ II. $\ce{CH3CH(OH)CH2CH3}$ III. $\ce{(CH3)2C=CH2}$ A. I and II only B. I and III only C. II and III only D. I, II and III

Which is the low-resolution $\ce{^1H}$ NMR spectrum of methyl methanoate, $\ce{HCOOCH3}$? A. Spectrum A B. Spectrum B C. Spectrum C D. Spectrum D