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 enzymes converts maltose to glucose?

Diastase

Maltase

Lactase

Zymase

2 / 50

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

Vinegar (Acetic acid)

Sulphur

Bleach (Sodium hypochlorite)

Phenols

3 / 50

How many calories are in fat……………..?

6

9

8

4

4 / 50

The whole universe is made up of almost Hydrogen?

60%

90%

70%

40%

5 / 50

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

Ni

Pd

All of the above

Sn

6 / 50

Valency of carbon is:

4

6

2

8

7 / 50

Which of the following elements has the highest electronegativity?

Oxygen (O)

Fluorine (F)

Chlorine (Cl)

Nitrogen (N)

8 / 50

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

1

5.5

5

0.5

9 / 50

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

1:9

1:6

1:8

1:4

10 / 50

MASS of sulpher is.......

92g

72g

32g

23g

11 / 50

Brine is used for industrial production of

NaOH

NHO

HCL

KCL

12 / 50

Benzene is good solvent for:

Resins

Iodine

Fats

All

13 / 50

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

NOT EQUAL

EQUAL

increase 2 time

Increase 4 time

14 / 50

Which of the following is more acidic in nature?

Benzene

p-nitrobenzene

Cresol

Phenol

15 / 50

Which organic compound does not undergo the Cannizzaro reaction?

α-Hydroxy aldehydes

Aromatic compounds

Aldehydes

Ketones

16 / 50

Neutron was discovered by Chadwick in:

1932

1935

1987

1923

17 / 50

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

20

30

60

10

18 / 50

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

1.25

2.43

7.32

0

19 / 50

Dipole moment of CO2 is......

0

2

4

7

20 / 50

__________is study about energy of a chemical system

thermochemistry

None

Biochemistry

Organichemistry

21 / 50

The molarity of CH4 is......

65.042g/mol

45.042g/mol

16.042g/mol

32.042g/mol

22 / 50

How many structural isomers are present for trichloro propane C3H5Cl3.

8

5

3

0

23 / 50

Number of free electrons in nickel Ni2+

8

8

2

3

24 / 50

Industrial waste water contains:

Pathogens

Inorganic salts & organic compounds

Occluded & dissolved gases

All of these

25 / 50

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

Ethanol

Glycerol

Gasoline

Propanoic acid

26 / 50

Which of the species is not paramagnetic?

Ne²+

Be+

As+

Cl-

27 / 50

Carbon atoms of diamond are:

sp2 hybridized

Not hybridized

sp1 hybridized

sp3 hybridized

28 / 50

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

Rare earth elements

Inert elements

Transition elements

Typical elements

29 / 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

30 / 50

Which one of the following is an incorrect statement?

The ionization potential of nitrogen is greater than that of chlorine

he ionization potential of beryllium is greater than that of boron

The electron affinity of fluorine is greater than that of chlorine

The electronegativity of fluorine is greater than that of chlorine.

31 / 50

Structural formula of cycloalkane is.....

CnHn

CnH2n

Cn2H5n

C8n6Hn8

32 / 50

Presence of heavy metals in water causes

Mental retardation

Cancer

Nervous disorder

All of these

33 / 50

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

0

4

3

7

34 / 50

which of the following element have unpaired electrons in s subshell

Co

Fe

Cr

Mn

35 / 50

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

Weak acid

Neutral substance

Strong acid

Strong base

36 / 50

Find PH of 0.001m of HCL:

3

2

4

8

37 / 50

The mass of one mole of electron is

0.184 mg

0.054 mg

0.54 mg

1.008 mg

38 / 50

Which organic compound does not undergo the Cannizzaro reaction?

Aldehydes

Ketones

α-Hydroxy aldehydes

Aromatic compounds

39 / 50

Which of the following is soft Coal?

Bituminous

Anthracite

Lignite

Peat

40 / 50

The ionization energy of Hydrogen is ?

12.54ev

10.54ev

13.6ev

17.56ev

41 / 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

decrease two times

increases two times

increases four times

42 / 50

On electrolysis of NaOH, hydrogen is liberated

none of them

At anode

in the electrolyte

At cathode

43 / 50

Ionization energy is lowest for

Inert gases

Halogens

Alkaline earth metals

Alkali metals

44 / 50

Which carbohydrate is the least sweet?

Fructose

Starch

Glucose

Sucrose

45 / 50

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

77.87%.

54.87%

74.87%.

84.87%.

46 / 50

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

8

2

3

4

47 / 50

Oxidation state of sodium

+4

+1

+5

+8

48 / 50

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

21

4

6

0

49 / 50

Which halogen has the smallest electron affinity?

Cl

I

Br

F

50 / 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

690°C

520°C

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