Chemistry · Exercise 1 of 3

Chemistry Chemistry - Section 1

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Subject: General Knowledge
Topic: Chemistry
Exercise: Chemistry - Section 1
Questions: 79

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Question 71

The inherited traits of an organism are controlled by

A RNA molecules

B nucleotides

C DNA molecules

D enzymes

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Question 72

The heat energy produced when the human body metabolises 1 gram of fat is

A 30 KJ

B 1 KJ

C 39 KJ

D 29 KJ

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Question 73

What are the number of moles of CO₂ which contains 16 g of oxygen?

A 0.5 mole

B 0.2 mole

C 0.2 mole

D 0.25 mole

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Question 74

The nucleus of a hydrogen atom consists of

A 1 proton only

B 1 proton + 2 neutron

C 1 neutron only

D 1 electron only

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Question 75

The heat required to raise the temperature of body by 1 K is called

A specific heat

B thermal capacity

C water equivalent

D None of the above

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Question 76

The nuclear particles which are assumed to hold the nucleons together are

A electrons

B positrons

C neutrons

D mesons

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Question 77

The mass of P₄O₁₀ that will be obtained from the reaction of 1.33 gram of P₄ and 5.07 of oxygen is

A 2.05 gram

B 3.05 gram

C 4.05 gram

D 5.05 gram

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Question 78

The octane number of zero is assigned to

A 2-methyl octane

B n-heptane

C iso-octane

D 3-methyl octane

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Question 79

The metal that is used as a catalyst in the hydrogenation of oils is

A Ni

B Pb

C Cu

D Pt

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