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?

Glycerol

Propanoic acid

Ethanol

Gasoline

2 / 50

Which carbohydrate is the least sweet?

Fructose

Glucose

Starch

Sucrose

3 / 50

The whole universe is made up of almost Hydrogen?

60%

40%

90%

70%

4 / 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

620°C

690°C

820°C

5 / 50

Number of free electrons in nickel Ni2+

2

8

8

3

6 / 50

Which organic compound does not undergo the Cannizzaro reaction?

Aldehydes

Ketones

α-Hydroxy aldehydes

Aromatic compounds

7 / 50

Which halogen has the smallest electron affinity?

I

F

Br

Cl

8 / 50

On electrolysis of NaOH, hydrogen is liberated

none of them

At anode

in the electrolyte

At cathode

9 / 50

Which of the species is not paramagnetic?

Ne²+

Cl-

As+

Be+

10 / 50

The ionization energy of Hydrogen is ?

12.54ev

13.6ev

17.56ev

10.54ev

11 / 50

MASS of sulpher is.......

72g

32g

92g

23g

12 / 50

Presence of heavy metals in water causes

Cancer

All of these

Mental retardation

Nervous disorder

13 / 50

which of the following element have unpaired electrons in s subshell

Fe

Cr

Mn

Co

14 / 50

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

54.87%

84.87%.

74.87%.

77.87%.

15 / 50

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

0

21

6

4

16 / 50

Industrial waste water contains:

Pathogens

All of these

Occluded & dissolved gases

Inorganic salts & organic compounds

17 / 50

Mark the correct statement:

Na+ is larger than Na atom

CI- and CI are equal in size

CI- is smaller than CI atom

Na+ is smaller than Na atom

18 / 50

Which organic compound does not undergo the Cannizzaro reaction?

Aldehydes

Ketones

Aromatic compounds

α-Hydroxy aldehydes

19 / 50

Benzene is good solvent for:

Fats

All

Iodine

Resins

20 / 50

How many structural isomers are present for trichloro propane C3H5Cl3.

0

3

5

8

21 / 50

Dipole moment of CO2 is......

2

0

7

4

22 / 50

Brine is used for industrial production of

HCL

KCL

NHO

NaOH

23 / 50

Structural formula of cycloalkane is.....

C8n6Hn8

Cn2H5n

CnHn

CnH2n

24 / 50

Which of the following is more acidic in nature?

Phenol

Cresol

p-nitrobenzene

Benzene

25 / 50

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

5.5

0.5

1

5

26 / 50

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

Transition elements

Typical elements

Rare earth elements

Inert elements

27 / 50

How many calories are in fat……………..?

4

9

6

8

28 / 50

Valency of carbon is:

4

8

6

2

29 / 50

The molarity of CH4 is......

16.042g/mol

32.042g/mol

45.042g/mol

65.042g/mol

30 / 50

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

8

2

3

4

31 / 50

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

1:8

1:4

1:9

1:6

32 / 50

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

EQUAL

Increase 4 time

increase 2 time

NOT EQUAL

33 / 50

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

decrease four times

increases two times

increases four times

decrease two times

34 / 50

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

30

20

10

60

35 / 50

The mass of one mole of electron is

0.054 mg

0.184 mg

1.008 mg

0.54 mg

36 / 50

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

Sn

Ni

Pd

All of the above

37 / 50

Which of the following elements has the highest electronegativity?

Nitrogen (N)

Chlorine (Cl)

Oxygen (O)

Fluorine (F)

38 / 50

Which one of the following is an incorrect statement?

The electronegativity of fluorine is greater than that of chlorine.

he ionization potential of beryllium is greater than that of boron

The ionization potential of nitrogen is greater than that of chlorine

The electron affinity of fluorine is greater than that of chlorine

39 / 50

Ionization energy is lowest for

Halogens

Alkali metals

Inert gases

Alkaline earth metals

40 / 50

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

Sulphur

Vinegar (Acetic acid)

Bleach (Sodium hypochlorite)

Phenols

41 / 50

Find PH of 0.001m of HCL:

4

3

2

8

42 / 50

Which of the following enzymes converts maltose to glucose?

Zymase

Lactase

Diastase

Maltase

43 / 50

Which of the following is soft Coal?

Anthracite

Lignite

Peat

Bituminous

44 / 50

__________is study about energy of a chemical system

None

Organichemistry

Biochemistry

thermochemistry

45 / 50

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

0

1.25

7.32

2.43

46 / 50

Carbon atoms of diamond are:

Not hybridized

sp2 hybridized

sp3 hybridized

sp1 hybridized

47 / 50

Neutron was discovered by Chadwick in:

1923

1987

1932

1935

48 / 50

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

3

7

0

4

49 / 50

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

Neutral substance

Strong base

Weak acid

Strong acid

50 / 50

Oxidation state of sodium

+4

+1

+8

+5

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