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

Propanoic acid

Gasoline

Glycerol

2 / 50

MASS of sulpher is.......

23g

92g

72g

32g

3 / 50

Presence of heavy metals in water causes

All of these

Cancer

Nervous disorder

Mental retardation

4 / 50

The molarity of CH4 is......

65.042g/mol

16.042g/mol

32.042g/mol

45.042g/mol

5 / 50

Which organic compound does not undergo the Cannizzaro reaction?

Aldehydes

Aromatic compounds

Ketones

α-Hydroxy aldehydes

6 / 50

Dipole moment of CO2 is......

0

4

2

7

7 / 50

How many calories are in fat……………..?

9

6

4

8

8 / 50

Which of the species is not paramagnetic?

Ne²+

Cl-

As+

Be+

9 / 50

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

EQUAL

increase 2 time

NOT EQUAL

Increase 4 time

10 / 50

Carbon atoms of diamond are:

sp1 hybridized

Not hybridized

sp3 hybridized

sp2 hybridized

11 / 50

Which carbohydrate is the least sweet?

Fructose

Sucrose

Glucose

Starch

12 / 50

Which organic compound does not undergo the Cannizzaro reaction?

Ketones

α-Hydroxy aldehydes

Aromatic compounds

Aldehydes

13 / 50

Which of the following is soft Coal?

Bituminous

Lignite

Anthracite

Peat

14 / 50

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

Strong base

Neutral substance

Strong acid

Weak acid

15 / 50

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

620°C

820°C

520°C

690°C

16 / 50

Benzene is good solvent for:

Resins

All

Iodine

Fats

17 / 50

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

Inert elements

Typical elements

Rare earth elements

Transition elements

18 / 50

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

10

60

20

30

19 / 50

The mass of one mole of electron is

0.54 mg

1.008 mg

0.184 mg

0.054 mg

20 / 50

Ionization energy is lowest for

Inert gases

Halogens

Alkali metals

Alkaline earth metals

21 / 50

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

0

6

4

21

22 / 50

Which halogen has the smallest electron affinity?

I

Br

Cl

F

23 / 50

Oxidation state of sodium

+4

+8

+1

+5

24 / 50

Neutron was discovered by Chadwick in:

1923

1935

1987

1932

25 / 50

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

4

7

3

0

26 / 50

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

2

3

4

8

27 / 50

Which of the following enzymes converts maltose to glucose?

Diastase

Maltase

Lactase

Zymase

28 / 50

Which one of the following is an incorrect statement?

The electron affinity of fluorine is greater than that of chlorine

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

29 / 50

Valency of carbon is:

4

6

2

8

30 / 50

Which of the following elements has the highest electronegativity?

Fluorine (F)

Chlorine (Cl)

Nitrogen (N)

Oxygen (O)

31 / 50

Find PH of 0.001m of HCL:

2

8

3

4

32 / 50

Number of free electrons in nickel Ni2+

8

8

3

2

33 / 50

The whole universe is made up of almost Hydrogen?

60%

70%

90%

40%

34 / 50

Mark the correct statement:

CI- is smaller than CI atom

Na+ is smaller than Na atom

Na+ is larger than Na atom

CI- and CI are equal in size

35 / 50

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

Sn

Ni

All of the above

Pd

36 / 50

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

Bleach (Sodium hypochlorite)

Phenols

Vinegar (Acetic acid)

Sulphur

37 / 50

Brine is used for industrial production of

NHO

NaOH

KCL

HCL

38 / 50

which of the following element have unpaired electrons in s subshell

Co

Fe

Mn

Cr

39 / 50

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

77.87%.

74.87%.

54.87%

84.87%.

40 / 50

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

0

2.43

1.25

7.32

41 / 50

On electrolysis of NaOH, hydrogen is liberated

At cathode

none of them

At anode

in the electrolyte

42 / 50

The ionization energy of Hydrogen is ?

13.6ev

12.54ev

10.54ev

17.56ev

43 / 50

Structural formula of cycloalkane is.....

CnHn

C8n6Hn8

Cn2H5n

CnH2n

44 / 50

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

1:8

1:9

1:4

1:6

45 / 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 four times

increases two times

decrease two times

46 / 50

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

1

5.5

0.5

5

47 / 50

__________is study about energy of a chemical system

thermochemistry

Organichemistry

None

Biochemistry

48 / 50

Industrial waste water contains:

Pathogens

Inorganic salts & organic compounds

All of these

Occluded & dissolved gases

49 / 50

Which of the following is more acidic in nature?

p-nitrobenzene

Phenol

Cresol

Benzene

50 / 50

How many structural isomers are present for trichloro propane C3H5Cl3.

0

3

8

5

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