CHM 201 CBT PRACTICE TEST

Ace/Undergragra February 9, 2024

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Take your time to read instructions before taking this test.

There are 40 questions which you are to answer in 15 minutes that gives you roughly 30 seconds per question.

If you can get at least 60%, you can be rest assured that you’ll ace CHM 201 exam

In a normal exam you will be asked between 40 – 60 questions but I only arranged 40 questions

Note

Do not be in a hurry to answer the questions

Do not waste time on a question you don’t know

Move as fast as possible and starting with questions that don’t have calculation first to save time

Always crosscheck

Don’t be in a hurry to submit, you are not in a competition

Don’t be scared. Getting an A is easy

Don’t be over confident, you can end up a D, E or F. Calm your blood, no be only you sabi book

Please do well to use our comment box incase there’s a message you want to pass to us

70 – 100 A

60 – 69 B

50 – 59 C

45 – 49 D

40 – 44 E

0 – 39 F

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Inorganic Chemistry

1 / 40

The difference between silica and silicate is ________

A. Silica is made of SiO4 units whereas silicate is made of SiO2 units

B. Silica is made of SiO4 units whereas silicate is made of SiO6 units

C. Silica is made of SiO6 units whereas silicate is made of SiO2 units

D. Silica is made of SiO2 units whereas silicate is made of SiO4 units

2 / 40

Ammonifying bacteria present in the soil decompose plants and animals when they die into ________

A. Nitrogenous and hydrides

B. Nitrogen and ammonium compounds

C. Ammonium and hydrides

D. Nitrogen and oxides

3 / 40

Group 5 elements form compounds mainly in two oxidation states, namely ____________.

A. +3 and +5

B. +3 and +6

C. +2 and +5

D. +3 and +2

4 / 40

Dilute nitric acid will oxidise HI to ____________.

A. I

B. H

C. HIO3

D. HIO4

5 / 40

________ occurs in the elemental state as diamond and graphite.

A. germanium

B. Silicon

C. Carbon

D. Tin

6 / 40

Concentrated nitric acid behaves as an ______________.

A. Reducing agent

B. None of the options

C. Redox agent

D. Oxidizing agent

7 / 40

All the elements of Group 5 can expand their octet except _____________.

A. Bismuth

B. Phosphorus

C. Nitrogen

D. Arsenic

8 / 40

Mineral silicates plays an important role in national economy because from it is produced _______.

A. Plastics, ceramics,paints

B. Glass, paints,ceramics

C. Glass, ceramics,cement

D. Cement,plastics,glass

9 / 40

Lightning discharge in the atmosphere converts nitrogen to _________.

A. Nitrate

B. Ammonia

C. Nitirite

D. Nitric Oxide

10 / 40

10.

Hydrazine can act as a coordinating ligand forming complexes with metal ions because of _________.

A. It has lone pairs of electrons

B. Hydrazine is highly reactive

C. Hydrazine is stable

D. The bond energy of N-N bond in hydrazine is very small

11 / 40

11.

In the gaseous state phosphorus exist as _________,

A. P

B. P4

C. P2

D. P6

12 / 40

12.

Diamond are used in jewellery on account of their ______.

A. Crystalline nature

B. High refractive index and dispersive power

C. High purity

D. Hard structure

13 / 40

13.

The bond energy of N-N bond in hydrazine is very small due to _______.

A. Attraction and repulsion between N-N bond and N-H bond in hydrazine

B. Repulsion of the nonbonding electrons which weaken the N-N bond

C. Attractive and repulsion of the nonbonding electrons and the N-N bond in hydrazine

D. Repulsion between N-N bond and N-H bond in hydrazine

14 / 40

14.

Sandstone, granite and slate are examples of ________.

A. Carbides

B. Cristobalite

C. Silica

D. Natural silicates

15 / 40

15.

Superphosphate of lime is a more effective fertilizer than phosphate rock because of _________.

A. Ca(H2PO4)2 is water soluble

B. Ca(H2PO4)2 is highly reactive

C. Ca(H2PO4)2 is oxidising

D. Ca(H2PO4)2 is reducing

16 / 40

16.

The reaction C6H6 + HNO3 will give _____________.

A. C6H5NO2 + H2O2

B. C6H5NO + H2O2

C. C6H5NO2 +H2O

D. C6H5NO3 + H2

17 / 40

17.

The reactivity of the various allotropes of phosphorus towards other substances decreases in the order?

A. brown-white-red-black

B. White-black-brown-red

C. Red-brown-black-white

D. Black-red-white-brown

18 / 40

18.

Boron and silicon combine with carbon to form ___________.

A. Methanides

B. Catenate compounds

C. Covalent carbides

D. Acetylides

19 / 40

19.

Dilute nitric acid will oxidise H2S to ____________.

A. H

B. S

C. H2S03

D. H2SO4

20 / 40

20.

The most stable hydride of phosphurous is _________.

A. Phosphide

B. Phosphine

C. Phosphorus dihydride

D. Phosphorus pentahydride

21 / 40

21.

Tin exhibit polymorphism because of _____________ .

A. It exists in two crystalline forms

B. It is a metal as well as a metalloid

C. It can function as a conductor and semi-conducto

D. It has a stable configuration

22 / 40

22.

Which one of the following compounds is formed when carbides are decomposed by water or dilute acids?

A. Propanal

B. Ethylene

C. Methanol

D. Acetylene

23 / 40

23.

Concentrated nitric acid readily oxidises solid non metals and metalloids to their respective _____________.

A. Salts

B. Ions

C. Hydrides

D. Oxoacids or hydrated oxides

24 / 40

24.

Other halogens apart from fluorine exhibit variable oxidation states due to ________.

A. None of the options

B. Other halogens have vacant p orbital whereas fluorine doesn't

C. All the options

D. Other halogens have vacant d orbital whereas fluorine doesn't

25 / 40

25.

Oxoacids in which the central atom is in a higher oxidation states are termed as ____________.

A. Hypo-ous acid

B. ic-acid

C. ous acid

D. Hypo-ic acid

26 / 40

26.

The compound among the options below with the least bond energy is ___________.

A. NH3

B. BiH3

C. SbH3

D. PH3

27 / 40

27.

Which of the options below indicates how carbon behaves differently from other members of Group 4?

A. Carbon has a much higher electronegativity and higher ionisation energy than other elements in the group

B. Carbon has a maximum covalency of 6 while other members have 4

C. Carbon forms complex compounds while the other members do not

D. Carbon forms solid oxides while the other members do not

28 / 40

28.

Ammonia functions as an electron donor because of __________.

A. Lone pair of electron on the nitrogen atom available for donation

B. None of the options

C. All the options

D. The nitrogen atom being more electronegative than hydrogen draws the electron pair it shares with hydrogen to itself, and can therefore donate it

29 / 40

29.

The tendency of gaining an electron to acquire a stable noble gas configuration makes the halogens ________.

A. Have low electron affinity

B. susceptible to oxidation

C. High electron affinity

D. Low ionization energy

30 / 40

30.

Silica gel is _____________ form of Silicon dioxide.

A. Gaseous

B. Crystalline

C. Amorphous

D. Semi solid

31 / 40

31.

____________ are formed by combination of carbon with some transition metals.

A. Coordination compounds

B. Interstitial carbides

C. Polymers

D. Alloys

32 / 40

32.

The forms of carbon include _________.

A. Coke, charcoal and carbon black

B. Charcoal and carbon black

C. Coke and charcoal

D. Coke and carbon black

33 / 40

33.

Which of the options below shows how carbon behaves differently from the rest of the elements in its group?

A. Carbon form both gaseous and solid oxides whereas others form only gaseous oxides

B. Carbon has a maximum covalency of 4 and can therefore form complex compounds

C. Carbon is the only element in the group that can form stable derivatives with double and triple bonds

D. Carbon has a much lesser electronegativity than other elements in the group

34 / 40

34.

The element with the highest electron affinity amongst the halogens is ___________.

A. Fluorine

B. Bromine

C. Chlorine

D. Astatine

35 / 40

35.

To distinguish between the oxidation states of the central atom in oxoacids, suffixes in which the central atom is in a lower oxidation state are termed _

A. ous acid

B. ic acid

C. Hypo-ous acid

D. Hypo-ic acid

36 / 40

36.

Table of Contents

The purest and most stable form of silica is ____________

A. Tridymite

B. Quartz

C. Cristobalite

D. Flint

37 / 40

37.

_____ is the main types of halides formed by Group 5 elements.

A. Dihalides

B. trihalides

C. Tetrahalides

D. pentahalides

38 / 40

38.

Hydrazine has how many lone pairs of electrons?

A. 1

B. 0

C. 3

D. 2

39 / 40

39.

_________ are formed by elements of 1,2, 3,11,12 and13 except boron.

A. Interstitial carbides

B. Covalent carbides

C. organic carbides

D. Ionic carbides

40 / 40

40.

Tin is obtained by the ______.

A. Reduction of oxides of tin with H

B. Oxidation of oxides of tin with Fe

C. Reduction of oxides of tin with carbon

D. Oxidation of oxides of tin with carbon

Your score is

The average score is 34%

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