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 one of the following is an incorrect statement?

The ionization potential of nitrogen 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 electron affinity of fluorine is greater than that of chlorine

2 / 50

__________is study about energy of a chemical system

Organichemistry

None

Biochemistry

thermochemistry

3 / 50

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

0.5

5.5

1

5

4 / 50

Brine is used for industrial production of

KCL

NHO

HCL

NaOH

5 / 50

The ionization energy of Hydrogen is ?

10.54ev

13.6ev

12.54ev

17.56ev

6 / 50

Which of the following enzymes converts maltose to glucose?

Maltase

Zymase

Lactase

Diastase

7 / 50

Structural formula of cycloalkane is.....

CnHn

CnH2n

C8n6Hn8

Cn2H5n

8 / 50

Oxidation state of sodium

+8

+4

+5

+1

9 / 50

Benzene is good solvent for:

All

Resins

Iodine

Fats

10 / 50

The mass of one mole of electron is

1.008 mg

0.054 mg

0.54 mg

0.184 mg

11 / 50

which of the following element have unpaired electrons in s subshell

Cr

Co

Mn

Fe

12 / 50

Neutron was discovered by Chadwick in:

1935

1932

1923

1987

13 / 50

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

0

4

7

3

14 / 50

Which carbohydrate is the least sweet?

Starch

Fructose

Glucose

Sucrose

15 / 50

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

All of the above

Ni

Pd

Sn

16 / 50

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

10

60

30

20

17 / 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

520°C

690°C

820°C

18 / 50

How many calories are in fat……………..?

6

4

9

8

19 / 50

Ionization energy is lowest for

Halogens

Inert gases

Alkali metals

Alkaline earth metals

20 / 50

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

NOT EQUAL

increase 2 time

Increase 4 time

EQUAL

21 / 50

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

Strong acid

Strong base

Weak acid

Neutral substance

22 / 50

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

Glycerol

Propanoic acid

Gasoline

Ethanol

23 / 50

Which organic compound does not undergo the Cannizzaro reaction?

Ketones

α-Hydroxy aldehydes

Aldehydes

Aromatic compounds

24 / 50

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

6

4

21

0

25 / 50

Which halogen has the smallest electron affinity?

Br

F

I

Cl

26 / 50

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

Bleach (Sodium hypochlorite)

Phenols

Sulphur

Vinegar (Acetic acid)

27 / 50

Which organic compound does not undergo the Cannizzaro reaction?

α-Hydroxy aldehydes

Aromatic compounds

Aldehydes

Ketones

28 / 50

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

Typical elements

Inert elements

Rare earth elements

Transition elements

29 / 50

Carbon atoms of diamond are:

sp1 hybridized

sp3 hybridized

sp2 hybridized

Not hybridized

30 / 50

Mark the correct statement:

Na+ is smaller than Na atom

Na+ is larger than Na atom

CI- is smaller than CI atom

CI- and CI are equal in size

31 / 50

Which of the following is soft Coal?

Bituminous

Anthracite

Peat

Lignite

32 / 50

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

2

8

4

3

33 / 50

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

1:9

1:6

1:8

1:4

34 / 50

Industrial waste water contains:

All of these

Inorganic salts & organic compounds

Pathogens

Occluded & dissolved gases

35 / 50

Find PH of 0.001m of HCL:

2

8

3

4

36 / 50

The molarity of CH4 is......

32.042g/mol

16.042g/mol

45.042g/mol

65.042g/mol

37 / 50

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

0

1.25

7.32

2.43

38 / 50

Which of the following elements has the highest electronegativity?

Oxygen (O)

Nitrogen (N)

Chlorine (Cl)

Fluorine (F)

39 / 50

Which of the following is more acidic in nature?

Phenol

p-nitrobenzene

Cresol

Benzene

40 / 50

How many structural isomers are present for trichloro propane C3H5Cl3.

5

0

8

3

41 / 50

Dipole moment of CO2 is......

2

0

7

4

42 / 50

The whole universe is made up of almost Hydrogen?

90%

70%

60%

40%

43 / 50

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

54.87%

84.87%.

74.87%.

77.87%.

44 / 50

Number of free electrons in nickel Ni2+

2

8

3

8

45 / 50

Which of the species is not paramagnetic?

Be+

As+

Ne²+

Cl-

46 / 50

Valency of carbon is:

2

8

6

4

47 / 50

MASS of sulpher is.......

72g

23g

92g

32g

48 / 50

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

decrease two times

increases four times

increases two times

decrease four times

49 / 50

Presence of heavy metals in water causes

Cancer

Mental retardation

Nervous disorder

All of these

50 / 50

On electrolysis of NaOH, hydrogen is liberated

in the electrolyte

none of them

At cathode

At anode

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