AFNS Chemistry Test 2 | Pro Genius Students

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Chemistry Test 2

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1 / 50

Chile saltpeter had the chemical formula

Na2 CO3 H 2 O

Na 2 B4 O7

KNO3

NaNO 3

2 / 50

UV radiation from the sun causes a reaction that produces

SO2

O3

CO

Flourides

3 / 50

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

1g of hydrogen

2g of hydrogen

4g of hydrogen

7g of hydrogen

4 / 50

The pH range of acid rain is

6 – 8

5 – 7

Less than 5

6.5 – 7

5 / 50

Which one of the following is an incorrect statement?

he ionization potential of beryllium is greater than that of boron

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

6 / 50

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

DO

All of the above

COD

BOD

7 / 50

Unit of dipole moment is.?

m-2

m-7

m-4

m-3

8 / 50

The chemical formula of camphor is

C10H16O

CHO

C8H6O

C3H4O

9 / 50

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

2

4

3

8

10 / 50

The mass of 0.5 mole of Aluminum iS

13.5 g

14 g

13 g

27 g

11 / 50

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

Chlorination

All of these

Incineration

Ozonation

12 / 50

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

All of the above

Ni

Sn

Pd

13 / 50

Fish die in water bodies polluted by sewage due to

Reduction in oxygen

Pathogens

Foul smell

Clogging of gills by silt

14 / 50

The most reactive allotropic form of phosphorus is

Yellow

White

Green

Pink

15 / 50

__________is study about energy of a chemical system

thermochemistry

Biochemistry

Organichemistry

None

16 / 50

The whole universe is made up of almost Hydrogen?

20%

80%

70%

80%

17 / 50

Mass of sodium in 53 g of Na2CO3 is

106 g

23 g

92 g

46 g

18 / 50

The alkali metals, which have radioactive isotopes

K and Rb

K

Na

Li

19 / 50

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

Hashmitos disease

Arthritis

Brights dieses

Minamat disease

20 / 50

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

Most electropositive

Less electronegative

Less electropositive

Most electronegative

21 / 50

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

All

Graphite.

Ethylene (C2H4)

Methane (CH4)

22 / 50

The pollutant which play an important role in smog formation

H2 S

NH 3

All of these

CO

23 / 50

Which organic compound does not undergo the Cannizzaro reaction?

α-Hydroxy aldehydes

Ketones

Aromatic compounds

Aldehydes

24 / 50

Ionization energy is lowest for

Inert gases

Halogens

Alkali metals

Alkaline earth metals

25 / 50

MASS of sulpher is.......

23g

72g

32g

92g

26 / 50

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

7

8

5

3

27 / 50

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

Dobreiner

Newlands

Al – Razi

Mendeleeve

28 / 50

Valency of carbon is:

6

4

8

2

29 / 50

The element that has a giant covalent structure is

Graphite

Silicon dioxide (silica)

All

silicon (Si)

30 / 50

The mass of one mole of electron is

1.008 mg

0.054 mg

0.184 mg

0.54 mg

31 / 50

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

Propanoic acid

Ethanol

Gasoline

Glycerol

32 / 50

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

None

Nitrogen dioxide

Chlorine gas

Carbon dioxide

33 / 50

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

690°C

820°C

520°C

620°C

34 / 50

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

5

5

3

7

35 / 50

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

H -

H3

H 2

H

36 / 50

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

Sp

Sp4

Sp2

Sp3

37 / 50

Environmental pollution affects

Biotic components

Plants only

Man only

Biotic and abiotic components of environment

38 / 50

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

Iodide>bromide>chloride> fluoride

Fluoride>chloride>bromide>iodide

Bromide>chloride>fluoride>iodide

Chloride>bromide>iodide>fluoride

39 / 50

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

520°C

620°C

690°C

720°C

40 / 50

Which of the following sulphates is not soluble in water?

Zinc sulphate

Sodium sulphate

Potassium sulphate

Barium sulphate

41 / 50

The total number of bonds in CaC2 is:

two sigma bond and one pi bonds

One sigma bond and two pi bonds

One sigma bond and one pi bonds

two sigma bond and two pi bonds

42 / 50

Elements with seven electrons in their valence shell are known as

Lanthanides

Alkali metals

Halogens

Inert

43 / 50

Ozone is located in

Thermosphere

Stratosphere

Troposphere

Mesosphere

44 / 50

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

Alcohol

Bleach

All

Disinfectant

45 / 50

Cesium and Francium are liquids above

30 o C

20 o C

10 o C

15 o C

46 / 50

Lead is

Soil pollutant

Air pollutant

Radioactive pollutant

Noise pollutan

47 / 50

The components of lithosphere are

Organic matter of earth crust

Soil

Mineral of earth crust

All of these

48 / 50

The hydrides which are non stoichiometric in nature are

Ionic

Complex

Covalent

Interstitial

49 / 50

As the atomic number of the halogen increases, the halogens

Become less dense

Lose their outermost electrons less easily

Gain electrons less easily

Becomes lighter in color

50 / 50

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

Fresh water lakes and ponds

Oceans

All have equal distribution

Glaciers & ice

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