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 element have unpaired electrons in s subshell

Mn

Cr

Co

Fe

2 / 50

How many calories are in fat……………..?

9

8

6

4

3 / 50

Dipole moment of CO2 is......

4

0

7

2

4 / 50

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

Sn

Ni

All of the above

Pd

5 / 50

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

74.87%.

54.87%

77.87%.

84.87%.

6 / 50

Presence of heavy metals in water causes

Mental retardation

Cancer

Nervous disorder

All of these

7 / 50

Brine is used for industrial production of

KCL

NaOH

HCL

NHO

8 / 50

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

Bleach (Sodium hypochlorite)

Phenols

Vinegar (Acetic acid)

Sulphur

9 / 50

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

4

3

0

7

10 / 50

Which organic compound does not undergo the Cannizzaro reaction?

Ketones

α-Hydroxy aldehydes

Aldehydes

Aromatic compounds

11 / 50

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

Strong acid

Weak acid

Strong base

Neutral substance

12 / 50

The mass of one mole of electron is

0.184 mg

1.008 mg

0.054 mg

0.54 mg

13 / 50

Which organic compound does not undergo the Cannizzaro reaction?

Ketones

α-Hydroxy aldehydes

Aromatic compounds

Aldehydes

14 / 50

The molarity of CH4 is......

16.042g/mol

45.042g/mol

65.042g/mol

32.042g/mol

15 / 50

Find PH of 0.001m of HCL:

3

8

4

2

16 / 50

Neutron was discovered by Chadwick in:

1935

1923

1932

1987

17 / 50

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

820°C

620°C

520°C

690°C

18 / 50

The whole universe is made up of almost Hydrogen?

40%

70%

90%

60%

19 / 50

Oxidation state of sodium

+1

+5

+4

+8

20 / 50

Which carbohydrate is the least sweet?

Starch

Fructose

Sucrose

Glucose

21 / 50

The ionization energy of Hydrogen is ?

10.54ev

17.56ev

12.54ev

13.6ev

22 / 50

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

2.43

0

7.32

1.25

23 / 50

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

2

3

4

8

24 / 50

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

30

60

10

20

25 / 50

Which of the following is soft Coal?

Bituminous

Lignite

Anthracite

Peat

26 / 50

Ionization energy is lowest for

Inert gases

Alkaline earth metals

Halogens

Alkali metals

27 / 50

Number of free electrons in nickel Ni2+

8

3

2

8

28 / 50

Industrial waste water contains:

Pathogens

Occluded & dissolved gases

Inorganic salts & organic compounds

All of these

29 / 50

Which halogen has the smallest electron affinity?

I

Br

F

Cl

30 / 50

On electrolysis of NaOH, hydrogen is liberated

At cathode

none of them

in the electrolyte

At anode

31 / 50

Structural formula of cycloalkane is.....

CnH2n

C8n6Hn8

Cn2H5n

CnHn

32 / 50

Which of the following elements has the highest electronegativity?

Chlorine (Cl)

Fluorine (F)

Oxygen (O)

Nitrogen (N)

33 / 50

Which of the following enzymes converts maltose to glucose?

Lactase

Diastase

Maltase

Zymase

34 / 50

Which of the following is more acidic in nature?

p-nitrobenzene

Cresol

Benzene

Phenol

35 / 50

Carbon atoms of diamond are:

sp3 hybridized

Not hybridized

sp2 hybridized

sp1 hybridized

36 / 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

37 / 50

Which of the species is not paramagnetic?

Cl-

Ne²+

As+

Be+

38 / 50

MASS of sulpher is.......

72g

92g

32g

23g

39 / 50

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

5

5.5

1

0.5

40 / 50

__________is study about energy of a chemical system

Organichemistry

thermochemistry

None

Biochemistry

41 / 50

Valency of carbon is:

4

8

6

2

42 / 50

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

Inert elements

Typical elements

Transition elements

Rare earth elements

43 / 50

Benzene is good solvent for:

All

Iodine

Fats

Resins

44 / 50

How many structural isomers are present for trichloro propane C3H5Cl3.

8

0

5

3

45 / 50

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

6

4

21

0

46 / 50

Mark the correct statement:

CI- is smaller than CI atom

Na+ is larger than Na atom

Na+ is smaller than Na atom

CI- and CI are equal in size

47 / 50

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

1:8

1:6

1:9

1:4

48 / 50

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

Ethanol

Gasoline

Propanoic acid

Glycerol

49 / 50

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

increase 2 time

EQUAL

NOT EQUAL

Increase 4 time

50 / 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

increases four times

decrease four times

decrease two times

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