Free MCQs & Online Quiz Practice for Exams

Q: Which one of the following substances is not present in acid rain?

A) H₂SO₄

B) HNO₃

C) HSO₃

D) CH₃COOH

Q: Photochemical oxidant PAN is formed by:

A) Action of oxide of nitrogen on hydrocarbons in presence of sunlight

B) Action of carbon dioxide on hydrocarbon in presence of sunlight

C) Action of hydrogen sulphide on hydrocarbon in presence of sunlight

D) Action of SO₂ and hydrocarbons

Q: Which two main gases are produced when you burn a piece of wood?

A) Oxygen and nitrogen

B) Carbon dioxide and oxygen

C) Carbon dioxide and steam

D) Carbon dioxide and nitrogen

Q: The temperature range of troposphere is:

A) 15 to -56

B) 56 to -2

C) -2 to -92

D) -92 to 1200

Q: In which of the following layers of atmosphere is there more thickness of the ozone layer?

A) Troposphere

B) Stratosphere

C) Mesosphere

D) Thermosphere

Q: Which of the following is more dangerous for the ozone layer?

A) CFCs

B) CO₂

C) CO

D) Oxides of nitrogen

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

A) DO

B) BOD

C) COD

D) All of the above

Q: In the purification of water the flocculating agent used is:

A) Alum

B) Nickel sulphate

C) Copper sulphate

D) Barium sulphate

Q: The basic principle of green chemistry is/are:

A) To prevent waste creation

B) To maximize the atom economy

C) To create less hazardous synthetic chemicals

D) All of the above

Q: Which one of the following is quantitative chemical analysis?

A) Salt analysis

B) Titration

C) Flame test

D) Bromine-water test

Q: C₂H₆O is the molecular formula of: i)Ethanol ii)Methanol iii)Dimethyl ether iv)Diethyl ether

A) i) & ii)

B) (ii) &(iii)

C) i) & iii)

D) (ii) & (iv)

Q: Which one of the following techniques is mainly used for determination of functional group in a compound?

A) IR Spectroscopy

B) NMR

C) UV/Visible Spectroscopy

D) Mass Spectroscopy

Q: Two different compounds will always give different absorption peak in ________region of IR:

A) 1500–625 cm⁻¹

B) 4000–1500 cm⁻¹

C) 3000–2500 cm⁻¹

D) 3500–1500 cm⁻¹

Q: Which one of the following methods relatively gives more information about the structure of an organic compound?

A) Mass Spectroscopy

B) NMR Spectroscopy

C) IR Spectroscopy

D) UV Spectroscopy

Q: The wavelength range of UV region is from:

A) 400–800 nm

B) 800–1200 nm

C) 1200–1600 nm

D) 10–400 nm

Q: Which one of the following hydrocarbons produces a proton NMR spectrum with more than one peak?

A) Methane

B) Ethane

C) Butane

D) Cyclobutane

Q: How many signals/peaks would you expect in the proton NMR spectrum of 1,1-dichloroethane?

A) 2

B) 4

C) 6

D) 8

Q: How many types of protons are there in butanoic acid?

A) 8

B) 2

C) 6

D) 4

Q: In combustion analysis water is absorbed by:

A) Mg(ClO₄)₂

B) NaOH

C) CuO

D) CuSO₄

Q: Modern methods of analysis are superior to classical ones because:

A) They give more accurate results

B) Small amounts of chemicals are used

C) Less time consuming

D) All of the above