Other Chemistry Answers

4 Which statement about benzene is correct?
Benzene is an isomer of cyclohexane
The ratio of carbon to hydrogen atoms in benzene is the same as in ethyne
Benzene reacts with bromine solution as if it is saturated
Benzene undergoes addition reaction more readily than hexene.
5 Which of the following condensed formulae is accurate for 2,2-dimethylbutane?

CH3C(CH3)2CH2CH3
CH3C(CH3)2CH2CH3

CH3C(CH3)CH2CH3
CH3C(CH3)CH2CH3

CH3(CH3)2CH2CH3
CH3(CH3)2CH2CH3

CH3C(CH3)2CH2CH3
CH3C(CH3)2CH2CH3
6 Which of these compounds is a saturated hydrocarbon?
Ethene
Ethane
Ethyne
Ethanol

1 Which of the following is a recrystallization solvent?
Diethyl ether
Water
Ethanol
All of the above
2 Which statement explains why the element "Carbon" forms so many compounds?
Carbon atoms combine readily with Oxygen
Carbon atoms have very high electronegativity
Carbon atoms readily form ionic bonds with other carbon atoms
Carbon atoms readily form covalent bonds with other carbon atoms
3 Dehydration of an alcohol leads to the formation of an ____________.
Alkane
Alkene
Alkyne
Aldehyde

19 Which of these is useful in suction filtration set ups?
Round-bottom flask
Filter flask
Beaker
Evaporating dish
20 The S.I. unit for length is ___________.
Inches
Feet
Metres
Grams

16 Which of the folowing dresses is inappropriate to wear in a laboratory?
shirt with rolled up sleeves
loose sleeves
cloth lab coat
rubber lab apron
17 Which of these flasks is useful in a distillation process?
Round-bottom flask
Erlenmeyer flask
Filter flask
Conical flask
18 Which of these laboratory apparatus may be used to crush solids into powder?
Tongs
Mortar and pestle
Crucible
Grinding machine

13 What is the best treatment for a serious burn?
Wash in water
Apply an ointment
Apply a cold compress
All of the above
14 The appropriate way to test gases for odour is ___________.
Fan some of the vapour toward your nose
Hold your nose directly over the containing vessel
Breathe in and out
None of the above
15 The following EXCEPT one will help to view the meniscus correctly.
Dim lighting
Proper lighting
Eye level viewing
White background

10 The best way to read the meniscus is ______________.
Upper meniscus at desk level
Lower meniscus at desk level
Lower meniscus at eye level
Upper meniscus at eye level
11 A dessicator is used to ___________.
store samples
dry samples
test samples
weigh samples
12 Which of these can be used to measure mass?
Conical flask
kilo machine
Dessicator
Balance

7 What should you do if a chemical gets into your eye?
Neutralize with base
Rub hands over your eyes
Flush it with gently flowing water
None of the above
8 The following methods can be used to separate liquids and solids EXCEPT
Decanting
Filtration
Centrifugation
Distillation
9 Which of the following is used to separate two immiscible liquids?
Buchner funnel
Filter flask
Conical flask
Separatory funnel

4 Which of the following is NOT a laboratory accident?
Cut
Heat burn
Malaria
Chemical burn
5 The best time to clean glass wares is ___________.
During its use
Anytime
The first time it is bought only
Immediately after its use
6 ______________ is an example of a laboratory dessicant.
Silica gel
Oxygen
Ammonia
Carbonmonoxide

1 Which of these actions is appropriate in the laboratory?
Smoking
Eating and Drinking
Washing hands frequently
Wearing contact lenses
2 When measuring a liquid, you use a_________, and you should also put it on a flat surface and get at _________ level to read it properly.
Beaker, Desk
Triple beam balance, Elevated
Graduated cylinder, Eye
Balance, Eye
3 Which of these funnels is used in suction filtration?
Buchner funnel
Filter funnel
Long stem funnel
Separatory funnel

19 The maximum capacity of the top-loading machine is ____________.
620 g
210 g
110 g
None of the above
20 ____________ is used to hold flasks and crucibles when they are hot.
Bunsen burner
Spatula
Tong
Holder