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Practise

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2730 questions · page 101 of 137 · choose a topic above to narrow them down

SA-AB-SP-0021 markL2 StandardCalculatorSpeciation

Allopatric speciation requires

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SA-AB-SP-0031 markL2 StandardCalculatorSpeciation

Reproductive isolation is necessary for speciation because it

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SA-AB-SP-0041 markL2 StandardCalculatorIsolation

Two frog populations breed in different months. This is

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SA-AB-SP-0051 markL2 StandardCalculatorIsolation

Mules being sterile is an example of

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SA-AC-AB-0021 markL2 StandardCalculatorConjugate pairs

The conjugate base of

\mathrm{H_2O}

is

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SA-AC-AB-0031 markL2 StandardCalculatorConjugate pairs

In

\mathrm{NH_3+H_2O\rightleftharpoons NH_4^++OH^-}

, water acts as

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SA-AC-AB-0052 marksL2 StandardCalculatorpH of strong acids

Calculate the pH of

0.0500

mol dm⁻³

\mathrm{HNO_3}

.

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SA-AC-AE-0021 markL2 StandardCalculatorMarkovnikov

The major product of propene with HBr is

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SA-AC-AE-0031 markL2 StandardCalculatorMarkovnikov

The most stable carbocation is

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SA-AC-AE-0041 markL2 StandardCalculatorMechanism

In the reaction of ethene with bromine, bromine acts as an electrophile because

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SA-AC-AE-0051 markL2 StandardCalculatorAlkene reactions

Ethene reacts with steam in the presence of

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SA-AC-AK-0021 markL2 StandardCalculatorRadical mechanism

Which is a termination step?

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SA-AC-AK-0031 markL2 StandardCalculatorRadical mechanism

Free-radical substitution needs

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SA-AC-AK-0041 markL2 StandardCalculatorFuels

Alkanes are unreactive because

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SA-AC-AK-0051 markL2 StandardCalculatorFuels

Balance:

\mathrm{C_{10}H_{22}\rightarrow C_8H_{18}+C_xH_4}

. Find

x

.

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SA-AC-AL-0021 markL2 StandardCalculatorOxidation

To make ethanal from ethanol, you should

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SA-AC-AL-0031 markL2 StandardCalculatorOxidation

Which alcohol is NOT oxidised by acidified K₂Cr₂O₇?

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SA-AC-AL-0041 markL2 StandardCalculatorOxidation

During the oxidation of an alcohol by acidified dichromate(VI), the colour changes from

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SA-AC-AL-0051 markL2 StandardCalculatorReactions

Dehydration of butan-2-ol can give

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SA-AC-AM-0021 markL2 StandardCalculatorNitriles

Ethanenitrile is reduced by LiAlH₄ to

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