Mdcat Chemistry Tests-Chapter 22 Environmental Chemistry

Question # 1

Which of the following molecule has largest number of shared pair of electrons?

CO₂ A
N₂ B
NH₃ C
C₂H₄ D

Question # 2

Which mechanism of reaction is shown by carbonyl compounds?

Nucleophilic addition A
Electrophilic substituion B
Free radical substitution C
Electrophilic addition D

Question # 3

Which one of the following compounds is known as tertiary alcohol?

1-Propanol A
2-methyl-1 propanol B
2-propanol C
2-methyl-2-propanol D

Question # 4

Alcohol in which carbon atom bonded to OH group is further attached with three alkyl group is .

Aromatic alcohol A
Tertiary alcohol B
Primary Alcohol C
Secondary Alcohol D

Question # 5

The essential property of a fertilizer is that it should be.

Partially soluble A
Highly soluble B
In soluble C
Immiscible D

Question # 6

Which of the following acts as a electrocphile in the electrphilic substitution of benzene.with bromine.?

Fe^-3 A
Br- B
FeCl^4- C
Fe⁺² D

Question # 7

The potential difference of an electrochemical cell is measured by

Calorimeter A
Voltmeter B
Galvanometer C
Ammeter D

Question # 8

Halogen are being used as fire extinguisher, mild antiseptic, CFCs and many other organic chemicals. Which of the following halogen is used to kill the bacteria in drinking water.

Bromine A
Fluorine B
Chlorine C
Iodine D

Question # 9

Nitrogen is present in air as a major constituent it is an inactive gas in comparison with oxygen which is the next major constituent of air Nonreactive nature of nitrogen is due to the reason.

There is one lone pair of electron on each nitrogen atom in its molecule A
Nitrogen have three unpaired electron i its 2p orbital which is comparatively stable elecrtonic configuration B
There is a triple covalent bond in nitrogen molecule which in very strong and molecule is polar C
There is a triple covalent bond in nitrogen molecule which is very strong and molecule is non polar D

Question # 10

Which of the following acts as a nucleophile in the reaction of alkyl halide with alcoholic aqueous ammonia?

NH3 A
H+ B
Br- C
NO2- D

Question # 11

Which one of the following enthalpy change ins always exothermic?

Enthalpy of atomization A
Enthalpy of combustion B
Enthalpy of solution C
Enthalpy of formation D

Question # 12

Which of following compound is solid and room temperature?

Ethanal A
Phenol B
Butane C
Methanol D

Question # 13

While finding the relative atomic mass, which of the following standard is used to compare the atomic mass of chlorine .

Carbon-12 A
Neon -20 B
Carbon -13 C
Nucleon number D

Question # 14

Gas is enclosed in a container of 20 cm3 with the moving piston. According to kinetic theory of gases, what will be the effect on freely moving molecules of the gas if temperature is increased from 20 ^oC in 100 ^oC?

Volume will be increased A
Decrease rate of a reaction B
Decrease yield of a reaction C
Increase yield of product D

Question # 15

Alcohol in which carbon atom bonded to OH group is further attached with three alkyl group is

Aromatic alcohol A
Tertiary alcohol B
Primary alcohol C
Secondary alcohol D

Question # 16

Electron affinity of the atom is the energy released when

electron is removed from gaseous atom A
Covalent bond of molecule is broken B
Electron is added to gaseous atom C
Covalent bond is formed between the atom D

Question # 17

Relation of water with quick lime result in the rise in the temperature of the system using the concept of energy change, indicate the nature of the reaction?

Endothermic reaction A
Third order reaction B
Exothermic reaction C
Non spontaneous reaction D

Question # 18

Which of these pollutants is produced by burning of coal and causes acid rain

SO2 A
CO2 B
CO C
NO D

Question # 19

In period 1 and period 3 maximum melting point shown by elements.

Nitrogen and phosphorous A
Carbon and silicon B
Lithium and sodium C
Neon and argan D

Question # 20

Which one will be act as a strong acid.

Dichloroethanoic acid A
Emanoic acid B
Chloroethanoic acid C
Trichlorothanoic acid D

Question # 21

Which one the following is the structure of Teflon?

(-CH2-CH2-)n A
(-CF2-CH2-)n B
(-CF2-CF2-)n C
(-CF2-CCl2-)n D

Question # 22

Which compound is obtained by the elimination of bromopropane?

Propene A
Ethene B
Propane C
Butane D

Question # 23

Reaction mechanism of alkanes with halogens is known as

Propagation A
Additon B
Elimination C
Free radical substitution D

Question # 24

According to Lowry-bronsted acid and bass concept, H2O is

A salt A
An acid B
A base C
An amphoteric species D

Question # 25

What is teh order of increasing reactivity of alkyl halides?

Iodoalkane <bromoalkane<chloroalkane<Fluoroalkane A
Fluoroalkane<Chloroalkane<Bromoalkane<Iodoalkane B
Iodoalkane<Bromoalkane<Chloroalkane<Fluoroalkane C
Fluroalkane<Chloroalakane< Bromo alkane<Iodo alkane D

Question # 26

Which compound will be produced by the oxidation of ethanol by acidified K2Cr2O7?

Ethanone A
Ethene B
Ethanoic acid C
Ethanol D

Question # 27

The catalyst used for the manufacture of H2SO4 by contact process is with bromine?

SO3 A
Pt/pd B
V2O5 C
Fe2O3 D

Question # 28

Which of the following reagents is used to distinguish between aldehydes and ketones.?

2,4 NDPH A
Bromine B
Alkaline Iodine C
Tollen's reagent D

Question # 29

Nylon -6,6 also called

Polyvinyl alcohol A
Polystyren B
Polyamide C
Polyester D

Question # 30

Halogen is a halo derivative of

Ethanol A
Methane B
Methanol C
Ethane D

Question # 31

Ligands having two lone pair of electrons for donation to the central transition metal ion are known as.

Bidentate ligands A
Hexadentate ligands B
Polydentate ligands C
Monodentate ligands D

Question # 32

Down the group acid base behavior of metallic oxides of group 2 elements changes to .

More basic A
No change B
Less basic C
More acidic D

Question # 33

Which is the correct electronic configuration of chromium.

1s²,2s²,3s²,2p⁶,3p⁶,4s²,3d⁶ A
1s²,2s²,2p⁶,3s⁶,3p⁶,3d⁶ B
1s²,2s²,3s²,2p⁶,3p⁶,4s²,3d⁴ C
1s²,2s²,2p⁶,3s²,3p⁶,4s²,3d⁵ D

Question # 34

Which option shows all the molecule with bond angle 109.5^o.

CH_4,CCl₄,NH₃ A
CH₄,NH₄ PH₃ B
SiCl₄ H₂O BeCl₂ C
SiCl₄ Nh₄CH₄ D

Question # 35

The species which are produced by electrolytic bond breaking and can act as electron pair donors are known as.

Cations A
Anions B
Nucleophiles C
Free radical D

Question # 36

Which one of the following compounds act as catalyst when alcohols react with carboxylic acids.

Pt A
Conc. H2SO5 B
Conc HNO3 C
Ni D

Question # 37

The standard electrode potential of hydrogen is arbitrarily taken at 298 K is

1.00 volt A
0.00 volt B
10.0 volt C
0.10 volt D

Question # 38

Which product is formed by teh reaction of carboxylic acid with alcohol?

Aldehyde A
Ether B
Alkane C
Ester D

Question # 39

The shape of [Co(NH₃)₆]³⁺ complex is.

Linear A
Octahedral B
T
Tetrahedral C
Square planer D

Question # 40

Butane molecule can have max no of isomers.

4 A
5 B
3 C
2 D

Question # 41

Percentage of nitrogen by volume in air is

20% A
78% B
98% C
50% D

Question # 42

Liquid in the container have temperature 70 C. What will be the temperature in Kelvin Scale?

203 K A
350 K B
343 K C
300 K D

Question # 43

Which of the following would react with ozone in the atmosphere?

F A
Cl B
O2 C
O D

Question # 44

Why is it necessary to distill aldehyde formed from oxidation of primary alcohol through acidified potassium dichromate (VI) solution or acidified sodium dichromate (VI) solution.

Aldehyde formed may be oxidised further to carboxylic and concerned A
Aldehyde formed may react with primary alcohol the original reactant B
Aldehyde formed may be oxidised further to a ketone C
Aldehyde formed is unstable and decomposed back to original precuser, ie. primary alcohol D

Question # 45

The dilute solution of ___________ is called vinegar.

Formic acid A
Acetic acid B
Oxalic acid C
Benzoic acid D

Question # 46

3.0 mole of calcium will contained________ g of calcium.

100 gm A
105 gm B
80 gm C
120 gm D

Question # 47

Which is the structure of polyvinyl chloride?

[H2C=CH-Cl] A
-[HCCl-CH-Cl]- B
-[H2C-CH-Cl]- C
-[CCl2-CCl2]- D

Question # 48

Select one which is alcohol

CH3-CH2-OH A
CH3COOH B
CH3-O-CH3 C
CH3-CH2-Br D

Sr.#	Question	Answer
1	What is teh order of increasing reactivity of alkyl halides?	A. Iodoalkane <bromoalkane<chloroalkane<Fluoroalkane B. Fluoroalkane<Chloroalkane<Bromoalkane<Iodoalkane C. Iodoalkane<Bromoalkane<Chloroalkane<Fluoroalkane D. Fluroalkane<Chloroalakane< Bromo alkane<Iodo alkane
2	Which is the structure of polyvinyl chloride?	A. [H2C=CH-Cl] B. -[HCCl-CH-Cl]- C. -[H2C-CH-Cl]- D. -[CCl2-CCl2]-
3	Which mechanism of reaction is shown by carbonyl compounds?	A. Nucleophilic addition B. Electrophilic substituion C. Free radical substitution D. Electrophilic addition
4	Percentage of nitrogen by volume in air is	A. 20% B. 78% C. 98% D. 50%
5	Which product is formed by teh reaction of carboxylic acid with alcohol?	A. Aldehyde B. Ether C. Alkane D. Ester
6	Nitrogen is present in air as a major constituent it is an inactive gas in comparison with oxygen which is the next major constituent of air Nonreactive nature of nitrogen is due to the reason.	A. There is one lone pair of electron on each nitrogen atom in its molecule B. Nitrogen have three unpaired electron i its 2p orbital which is comparatively stable elecrtonic configuration C. There is a triple covalent bond in nitrogen molecule which in very strong and molecule is polar D. There is a triple covalent bond in nitrogen molecule which is very strong and molecule is non polar
7	The dilute solution of ___________ is called vinegar.	A. Formic acid B. Acetic acid C. Oxalic acid D. Benzoic acid
8	The potential difference of an electrochemical cell is measured by	A. Calorimeter B. Voltmeter C. Galvanometer D. Ammeter
9	Which option shows all the molecule with bond angle 109.5^o.	A. CH_4,CCl₄,NH₃ B. CH₄,NH₄ PH₃ C. SiCl₄ H₂O BeCl₂ D. SiCl₄ Nh₄CH₄
10	Which is the correct electronic configuration of chromium.	A. 1s²,2s²,3s²,2p⁶,3p⁶,4s²,3d⁶ B. 1s²,2s²,2p⁶,3s⁶,3p⁶,3d⁶ C. 1s²,2s²,3s²,2p⁶,3p⁶,4s²,3d⁴ D. 1s²,2s²,2p⁶,3s²,3p⁶,4s²,3d⁵

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