# Geas Chemistry Quiz-4

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GEAS CHEMISTRY

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• 1.
• A.

4.01 x 10^6 g

• B.

6.01 x 10^ 6 g

• C.

5.01 x 10^ 6 g

• D.

3.01 x 10^ 6 g

• 2.
The reaction of 6.54 g of zinc and 3.20 g of oxygen produces 9.74 g of zinc oxide, the only compound of theses elements. How much zinc oxide would be produced if 6.54 g of zinc and 5.00 g of oxygen were mixed and allowed to react?
• A.

7.12 g

• B.

9.74 g

• C.

6.89 g

• D.

8.12 g

• 3.
• A.

11.06 g

• B.

14.90 g

• C.

13.07 g

• D.

12.89 g

• 4.
How much oxygen is required to convert 11.24 g of cadmium to 12.84 g of cadmium oxide?
• A.

1.82 g

• B.

1.60 g

• C.

1.34 g

• D.

1.28 g

• 5.
Calculate the number of atomes in a 3.50 mol of atoms?
• A.

2.11 x 10^24

• B.

4.11 x 10^24

• C.

3.11 x 10^24

• D.

5.11 x 10^24

• 6.
CAlculate the empirical formula of a compound composed of 52.9 % carbon and 47.1 % oxygen
• A.

C02

• B.

C402

• C.

C202

• D.

C302

• 7.
If 2 L of solution contains 4.5 mol of solute, what is the molarity of the solution?
• A.

2.50M

• B.

2.75M

• C.

2.25M

• D.

2.00M

• 8.
Calculate the mass of water required to prepare a 4.00 m aqueous solution of NH3 using 25.0g HN3.
• A.

0.416 kg

• B.

0.322 kg

• C.

0.278 kg

• D.

0.368 kg

• 9.
The mole fraction of alcohol in water is 0.100 Calculate its molality.
• A.

5.23 m

• B.

6.17 m

• C.

4.32 m

• D.

3.90 m

• 10.
Calculate the initial volume if a sample of gas at 75 C is changed to 1.50 L at 25 C at constant pressure.
• A.

1.75 L

• B.

1.95 L

• C.

1.85 L

• D.

1.65 L

• 11.
Calculate the final volume if a 1.50 L sample of gass at 905 torr and 10 C is changed to 1.000 atm at 100 C
• A.

1.25 L

• B.

2.35 L

• C.

1.75 L

• D.

2.85 L

• 12.
• A.

0.0516 mol

• B.

0.516 mol

• C.

0.00516 mol

• D.

5.16 mol

• 13.
Calculate the oxygen pressure in a mixture of 0.500 mol of oxygen and 0.750 mol of nitrogen with a total pressure of 40.0kPa
• A.

15.0kPa

• B.

16.0kPa

• C.

15.5kPa

• D.

16.5kPa

• 14.
In a certain experiment, argon effuses from a porous cup at 4.00 mmol/minute. How fast would cholorine effuse under the same condition?
• A.

3.00 mmol/min

• B.

4.00 mmol/min

• C.

3.50 mmol/min

• D.

4.50 mmol/min

• 15.
On a space station, a 10.0-L steel drum of oxygen gas at 25 C and 101.3kPa pressure spings a leak and 8.00g of gas escapes before the leak is plugged. What is the final pressure of the oxygen in the drum at 25 C?
• A.

37.1 kPa

• B.

36.8 kPa

• C.

39.4 kPa

• D.

38.2 kPa

• 16.
What gas is likely to behave as an ideal gas when subjected to high temperature and low pressure?
• A.

Krypton

• B.

Hydrogen

• C.

Oxygen

• D.

Helium

• 17.
Of the elements below, which one has the highest electronegativity value?
• A.

Magnesium

• B.

Phosphorus

• C.

Carbon

• D.

Iodine

• 18.
The highest average translational kinetic energy occurs in which state of matter?
• A.

Gas

• B.

Solid

• C.

Liquid

• D.

Gas and liquid

• 19.
How will you test an ammonia gas?
• A.

Place a moist red litmus paper in the gas

• B.

Pass the gas through limewater

• C.

Place a moist blue litmus paper in the gas

• D.

Insert a glowing splint into the gas

• 20.
The oxidation number of a simple ion
• A.

Is equivalent to its charge

• B.

Is equal to zero

• C.

Ranges from 0 to 1

• D.

Ranges from -1 to 1

• 21.
Which of the following is most basic?
• A.

Ammonia

• B.

Milk of magnesia

• C.

Bleach

• D.

Baking soda

• 22.
Which of the following is most acidic?
• A.

Boric acid

• B.

Battery acid

• C.

Orange juice

• D.

Vinegar

• 23.
Which salts are insoluble in water?
• A.

Carbonate salt

• B.

Sulphate salt

• C.

Nitrate salt

• D.

Ethanoate salts

• 24.
Insoluble salts can be prepared by
• A.

Filtration

• B.

Distilation

• C.

Precipitation

• D.

Evaporation

• 25.
Brass contains how many percent copper?
• A.

80 %

• B.

70 %

• C.

75 %

• D.

65 %

• 26.
All metals below will not react with cold water except:
• A.

Zinc

• B.

Copper

• C.

Calcium

• D.

Iron

• 27.
All metals below has no reaction with steam except
• A.

Iron

• B.

• C.

Copper

• D.

Silver

• 28.
Which of the following metals reacts very slowly with dilute hydrochloric acid?
• A.

Zinc

• B.

Copper

• C.

Silver

• D.

• 29.
What is the range of carbon content for medium steel?
• A.

0.6 - 1.0 %

• B.

0.2 - 0.6 %

• C.

1.0 -1.5 %

• D.

< 0.2 %

• 30.
Which of the following is a property of high carbon steel?
• A.

Malleable

• B.

Brittle

• C.

Ductile

• D.

All of the choices

• 31.
The atmosphere contains how many percent carbon dioxide?
• A.

0.01

• B.

0.08

• C.

0.03

• D.

0.05

• 32.
WHich are pollutant traps heat to cause global warming or the "green house effect"?
• A.

Methane

• B.

Hydrocarbon

• C.

Carbon monoxide

• D.

Nitrogen oxide

• 33.
A siren emits a sound which returns to the source in 4 s. how far away is the object which caused echo from the source? assume the temperature to be 30 C
• A.

1,589 m

• B.

1,472 m

• C.

1,267 m

• D.

1,328 m

• 34.
Alkanes are saturated hyrocarbons that contain ________ carbon carbon covalent bonds
• A.

2

• B.

4

• C.

1

• D.

3

• 35.
What is the color of bromine?
• A.

Greenish-yellow

• B.

Pale yellow

• C.

Reddish brown

• D.

Purplish black

• 36.
All halogens have how many electrons in the out shell of the atom?
• A.

5

• B.

6

• C.

7

• D.

8

• 37.
Which element in group 8 is used in the treatment of cancer?
• A.

• B.

Argon

• C.

Xenon

• D.

Krypton

• 38.
The noble gases occupy 1% of the atmosphere of which _______ is argon.
• A.

0.83

• B.

0.88

• C.

0.90

• D.

0.93

• 39.
Pewter is metal used for making souvenirs. How many percent of pewter is antimony?
• A.

1

• B.

3

• C.

2

• D.

4

• 40.
Duralumin is an allow of aluminum, copper magnesium and manganese. How many percent of duralumin is manganese?
• A.

2

• B.

1

• C.

3

• D.

4

• 41.
What is the color of solid magnesium oxide?
• A.

Black

• B.

Brown

• C.

White

• D.

Gray

• 42.
Who was the first to isolate oxygen in its gaseous state?
• A.

Lavoiser

• B.

Priestley

• C.

Hess

• D.

Dalton

• 43.
_____________ is a reaction in which a molecule adds to the two carbon atoms of a double bond.
• A.

• B.

Hydrogeneration reaction

• C.

Chlorination reaction

• D.

Bromination reaction

• 44.
What refers to the reaction of halogens that take place at room temperature?
• A.

Hydrogeneration

• B.

Bromination

• C.

Hydration

• D.

Chlorination

• 45.
The hardness of margarine formed is dependent on the amount of _________ added.
• A.

Hydrogen

• B.

Salt

• C.

Milk

• D.

Fat

• 46.
The chalcogens are elements in what group in the periodic table?
• A.

Group VA

• B.

Group VIA

• C.

Group VIIA

• D.

Group IVA

• 47.
What alkali metal is usually used for x-ray apparatus because of its ability to allow x-rays to pass through with minimum absorption?
• A.

Magnesium

• B.

• C.

Beryllium

• D.

Barium

• 48.
Who coined the term plasma in 1928?
• A.

William Crookes

• B.

Irving Langmuir

• C.

Albert Einstein

• D.

Eric Cornell

• 49.
Nonpolar Covalent bond occurs if the difference in electronegativity ranges from
• A.

0.00 to 0.40

• B.

0.50 to 1.90

• C.

1.90 to 2.00

• D.

2.00 and up

• 50.
" The solubility of gas in a liquid is directly proportional to the partial pressure of the gas above the solution". This is known as:
• A.

Hund's Law

• B.

Pascal's Law

• C.

Henry's Law

• D.

Dalton's Law