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

The ionization energy of Hydrogen is ?

12.54ev
10.54ev
17.56ev
13.6ev

2 / 50

which of the following element have unpaired electrons in s subshell

Co
Fe
Mn
Cr

3 / 50

Which of the following elements has the highest electronegativity?

Chlorine (Cl)
Nitrogen (N)
Fluorine (F)
Oxygen (O)

4 / 50

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

1.25
0
7.32
2.43

5 / 50

The whole universe is made up of almostHydrogen?

40%
90%
70%
60%

6 / 50

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

Pd
Ni
Sn
All of the above

7 / 50

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

8
2
4
3

8 / 50

How many calories are in fat……………..?

6
8
9
4

9 / 50

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

Weak acid
Neutral substance
Strong base
Strong acid

10 / 50

The mass of one mole of electron is

0.184 mg
1.008 mg
0.054 mg
0.54 mg

11 / 50

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

1:9
1:4
1:8
1:6

12 / 50

Find PH of 0.001m of HCL:

3
4
2
8

13 / 50

Benzene is good solvent for:

Fats
All
Iodine
Resins

14 / 50

On electrolysis of NaOH, hydrogen is liberated

none of them
At cathode
At anode
in the electrolyte

15 / 50

Which of the following is more acidic in nature?

Cresol
Benzene
Phenol
p-nitrobenzene

16 / 50

Which carbohydrate is the least sweet?

Glucose
Fructose
Starch
Sucrose

17 / 50

Number of free electrons in nickel Ni2+

8
3
2
8

18 / 50

Neutron was discovered by Chadwick in:

1923
1987
1932
1935

19 / 50

Carbon atoms of diamond are:

Not hybridized
sp1 hybridized
sp2 hybridized
sp3 hybridized

20 / 50

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

Glycerol
Ethanol
Gasoline
Propanoic acid

21 / 50

__________is study about energy of a chemical system

None
Biochemistry
Organichemistry
thermochemistry

22 / 50

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

Phenols
Bleach (Sodium hypochlorite)
Vinegar (Acetic acid)
Sulphur

23 / 50

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

Rare earth elements
Inert elements
Transition elements
Typical elements

24 / 50

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

5.5
5
1
0.5

25 / 50

Which organic compound does not undergo the Cannizzaro reaction?

Aldehydes
Ketones
Aromatic compounds
α-Hydroxy aldehydes

26 / 50

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

84.87%.
77.87%.
54.87%
74.87%.

27 / 50

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

60
30
20
10

28 / 50

Which halogen has the smallest electron affinity?

I
Br
Cl
F

29 / 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
690°C
520°C

30 / 50

Which of the species is not paramagnetic?

Ne²+
As+
Cl-
Be+

31 / 50

Valency of carbon is:

6
2
8
4

32 / 50

Mark the correct statement:

Na+ is larger than Na atom
Na+ is smaller than Na atom
CI- is smaller than CI atom
CI- and CI are equal in size

33 / 50

Structural formula of cycloalkane is.....

Cn2H5n
CnHn
CnH2n
C8n6Hn8

34 / 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
decrease two times
increases two times

35 / 50

Oxidation state of sodium

+8
+4
+5
+1

36 / 50

Which one of the following is an incorrect statement?

The electronegativity of fluorine is greater than that of chlorine.
The electron affinity of fluorine is greater than that of chlorine
The ionization potential of nitrogen is greater than that of chlorine
he ionization potential of beryllium is greater than that of boron

37 / 50

Industrial waste water contains:

All of these
Occluded & dissolved gases
Pathogens
Inorganic salts & organic compounds

38 / 50

Dipole moment of CO2 is......

2
4
0
7

39 / 50

Which of the following is soft Coal?

Bituminous
Anthracite
Lignite
Peat

40 / 50

How many structural isomers are present for trichloro propane C3H5Cl3.

0
3
8
5

41 / 50

Presence of heavy metals in water causes

Cancer
Nervous disorder
Mental retardation
All of these

42 / 50

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

0
6
4
21

43 / 50

Which organic compound does not undergo the Cannizzaro reaction?

Aromatic compounds
Aldehydes
Ketones
α-Hydroxy aldehydes

44 / 50

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

0
4
7
3

45 / 50

MASS of sulpher is.......

32g
72g
23g
92g

46 / 50

The molarity of CH4 is......

32.042g/mol
45.042g/mol
65.042g/mol
16.042g/mol

47 / 50

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

increase 2 time
NOT EQUAL
Increase 4 time
EQUAL

48 / 50

Brine is used for industrial production of

NaOH
KCL
NHO
HCL

49 / 50

Ionization energy is lowest for

Alkaline earth metals
Halogens
Inert gases
Alkali metals

50 / 50

Which of the following enzymes converts maltose to glucose?

Diastase
Zymase
Lactase
Maltase

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