AFNS Chemistry Test 1 | Pro Genius Students

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To pass the quiz, you need to answer at least 50% of the questions correctly. However, we recommend that you aim for a higher score, as this will give you a better chance of success on the Pak Army test.

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Chemistry Test 1

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1 / 50

Which of the following is a mixture of low-boiling hydrocarbons?

Ethanol

Glycerol

Gasoline

Propanoic acid

2 / 50

Oxidation number of CARBON in GLUCOSE is.......

4

0

21

6

3 / 50

Number of free electrons in nickel Ni2+

2

8

8

3

4 / 50

Dipole moment of CO2 is......

7

4

2

0

5 / 50

Presence of heavy metals in water causes

Mental retardation

Nervous disorder

All of these

Cancer

6 / 50

Find the temperature at which the rate of effusion of N₂ is 1.625 times to that of SO₂ at 500°C

520°C

820°C

690°C

620°C

7 / 50

Structural formula of cycloalkane is.....

C8n6Hn8

Cn2H5n

CnH2n

CnHn

8 / 50

The mass of one mole of electron is

1.008 mg

0.184 mg

0.054 mg

0.54 mg

9 / 50

Which of the following enzymes converts maltose to glucose?

Zymase

Lactase

Maltase

Diastase

10 / 50

Ionization energy is lowest for

Inert gases

Alkali metals

Halogens

Alkaline earth metals

11 / 50

The whole universe is made up of almost Hydrogen?

60%

40%

70%

90%

12 / 50

How many types of amino acids form the proteins in the body?

20

30

60

10

13 / 50

How many structural isomers are present for trichloro propane C3H5Cl3.

8

5

0

3

14 / 50

Valency of carbon is:

4

2

6

8

15 / 50

Neutron was discovered by Chadwick in:

1935

1923

1932

1987

16 / 50

which of the following element have unpaired electrons in s subshell

Co

Fe

Cr

Mn

17 / 50

Molarity of 10g of NAOH is......

1.25

2.43

0

7.32

18 / 50

Which of the species is not paramagnetic?

Cl-

Be+

As+

Ne²+

19 / 50

Seventh period consists of……………….normal elements?

8

4

3

2

20 / 50

MASS of sulpher is.......

72g

23g

32g

92g

21 / 50

The ionization energy of Hydrogen is ?

10.54ev

12.54ev

13.6ev

17.56ev

22 / 50

Which of the following elements react with steam to produce H2 gas?

Sn

Ni

All of the above

Pd

23 / 50

At equilibrium, the amount of product and reactant becomes........

NOT EQUAL

EQUAL

increase 2 time

Increase 4 time

24 / 50

Which of the following is the best option for disinfecting your slab?

Sulphur

Phenols

Vinegar (Acetic acid)

Bleach (Sodium hypochlorite)

25 / 50

Which of the following is more acidic in nature?

p-nitrobenzene

Phenol

Benzene

Cresol

26 / 50

Which one of the following is an incorrect statement?

The electronegativity of fluorine is greater than that of chlorine.

The electron affinity of fluorine is greater than that of chlorine

The ionization potential of nitrogen is greater than that of chlorine

he ionization potential of beryllium is greater than that of boron

27 / 50

If absolute temperature of a gas is doubled and the pressure is reduced to one half the volume of gas will:

increases two times

decrease two times

increases four times

decrease four times

28 / 50

Which organic compound does not undergo the Cannizzaro reaction?

α-Hydroxy aldehydes

Aldehydes

Aromatic compounds

Ketones

29 / 50

According to molecular orbital theory, what is the bond order of Li2+?

5

5.5

1

0.5

30 / 50

Oxidation state of sodium

+8

+1

+4

+5

31 / 50

Carbon atoms of diamond are:

Not hybridized

sp1 hybridized

sp2 hybridized

sp3 hybridized

32 / 50

Industrial waste water contains:

Occluded & dissolved gases

Inorganic salts & organic compounds

Pathogens

All of these

33 / 50

Brine is used for industrial production of

HCL

KCL

NHO

NaOH

34 / 50

On electrolysis of NaOH, hydrogen is liberated

none of them

At cathode

in the electrolyte

At anode

35 / 50

Which of the following elements has the highest electronegativity?

Oxygen (O)

Chlorine (Cl)

Fluorine (F)

Nitrogen (N)

36 / 50

In 32.5 g of CH4 the percentage of carbon is.......

77.87%.

74.87%.

54.87%

84.87%.

37 / 50

Which of the following best describes the nature of ammonium chloride?

Neutral substance

Weak acid

Strong acid

Strong base

38 / 50

Which carbohydrate is the least sweet?

Glucose

Sucrose

Starch

Fructose

39 / 50

Which organic compound does not undergo the Cannizzaro reaction?

Aldehydes

α-Hydroxy aldehydes

Aromatic compounds

Ketones

40 / 50

“s” and “p” block elements are also called

Inert elements

Typical elements

Transition elements

Rare earth elements

41 / 50

What is the pH of a solution with 0.0001 M HCl?

0

4

3

7

42 / 50

Mark the correct statement:

CI- is smaller than CI atom

Na+ is smaller than Na atom

CI- and CI are equal in size

Na+ is larger than Na atom

43 / 50

Which halogen has the smallest electron affinity?

F

Br

Cl

I

44 / 50

__________is study about energy of a chemical system

Biochemistry

None

Organichemistry

thermochemistry

45 / 50

Find PH of 0.001m of HCL:

2

8

4

3

46 / 50

Benzene is good solvent for:

Iodine

Resins

Fats

All

47 / 50

How many calories are in fat……………..?

6

8

4

9

48 / 50

The ratio of the water molecule in plaster of Paris and gypsum is

1:9

1:8

1:6

1:4

49 / 50

Which of the following is soft Coal?

Anthracite

Lignite

Bituminous

Peat

50 / 50

The molarity of CH4 is......

32.042g/mol

65.042g/mol

16.042g/mol

45.042g/mol

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