AFNS Chemistry Test 2

AFNS Chemistry Test 2

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Posted:22 Jan, 2024

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 2

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1 / 50

What value is the pH of a 10^-10 M NaOH solution closely related to?

2 / 50

Fish die in water bodies polluted by sewage due to

3 / 50

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

4 / 50

The total number of bonds in CaC2 is:

5 / 50

The hydrogen, which is present in the atmosphere of sun and stars in a large amount, is

6 / 50

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

7 / 50

The element that has a giant covalent structure is

8 / 50

Environmental pollution affects

9 / 50

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

10 / 50

Chile saltpeter had the chemical formula

11 / 50

Which of the following factors help to measure quality of water?

12 / 50

How many Faradays of electricity are required to remove one mole of AlCl3?

13 / 50

The mass of one mole of electron is

14 / 50

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

15 / 50

UV radiation from the sun causes a reaction that produces

16 / 50

The pH range of acid rain is

17 / 50

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

18 / 50

The yellow color in photochemical smog is due to presence of _______

19 / 50

The hydrides which are non stoichiometric in nature are

20 / 50

Lead is

21 / 50

The whole universe is made up of almost Hydrogen?

22 / 50

The pollutant which play an important role in smog formation

23 / 50

The alkali metals, which have radioactive isotopes

24 / 50

Disease caused by eating fish in water contaminated with industrial waste having mercury

25 / 50

The chemical formula of camphor is

26 / 50

In H2O, ........ hybridization is present.

27 / 50

1 mole of hydrogen contains .......

28 / 50

Mass of sodium in 53 g of Na2CO3 is

29 / 50

In the periodic table each period begins with a metal, which is

30 / 50

Valency of carbon is:

31 / 50

The mass of 0.5 mole of Aluminum iS

 

 

32 / 50

 Which one of the following makes the bulk of hydrosphere’s content?

33 / 50

MASS of sulpher is.......

34 / 50

The components of lithosphere are

35 / 50

which molecule or structure does not contain three  atoms bonded at an angle between 109° and 110°?

36 / 50

Cesium and Francium are liquids above

37 / 50

Ionization energy is lowest for

38 / 50

Which one of the following is an incorrect statement?

39 / 50

The ionic halides in order of decreasing m.p and b.p can be arranges as

40 / 50

Unit of dipole moment is.?

41 / 50

Which organic compound does not undergo the Cannizzaro reaction?

42 / 50

Ozone is located in

43 / 50

The process in solid waste is burnt at high temperature ranging from 900 to 1000 o C

44 / 50

Elements with seven electrons in their valence shell are known as

45 / 50

Under what category can a floor cleaning agent that serves to make floors bacteria-free be placed:

46 / 50

__________is study about energy of a chemical system

47 / 50

The most reactive allotropic form of phosphorus is

48 / 50

______ classified the then known elements into metals, non metals and their derivatives

49 / 50

Which of the following sulphates is not soluble in water?

50 / 50

As the atomic number of the halogen increases, the halogens

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