Practice Environmental chemistry - general science mcq Online Quiz (set-2) For All Competitive Exams

Q-1)   Which of the following is not a synthetic fibre:

(a) Nylon

(b) Rayon

(c) Angora

(d) Polyester

Q-2)   The polymeric fibre used as a substitute for wool in making synthetic blankets, sweaters, etc., is

(a) orlon

(b) teflon

(c) nylon

(d) Bakelite

Q-3)   What is a mixture of potassium nitrate, powdered charcoal and sulphur called ?

(a) Paint

(b) Cement

(c) Glass

(d) Gun power

Q-4)   Which one of the following polymeric materials is used for making bullet proof jacket?

(a) Kevlar

(b) Rayon

(c) Nylon-6, 6

(d) Dacron

Q-5)   Consider the following statements:

1. Use of fertilizers has role on water pollution
2. Excessive use of pesticides help to decrease water pollution.

Which of these statement(s) above is/are correct ?

(a) 2 only

(b) 1 only

(c) 1 and 2

(d) None

Q-6)   The type of pollution caused by spraying of DDT

(a) Air and water

(b) Air

(c) Air and soil

(d) Air, water and soil

Q-7)   Which one of the following chemicals is used in beauty parlours for hair-setting? [NDA]

(a) Silicon based

(b) Phosphorus based

(c) Sulphur based

(d) Iron based

Q-8)   The substance which is not regarded as a pollutant?

(a) CO₂

(b) O₃

(c) NO₂

(d) Hydrocarbons

Q-9)   A green house

(a) both the above

(b) is that “body” which allows the short wavelength incoming solar radiation to enter in, but does not allow long wavelength outgoing infra-red radiations to escape out

(c) is an enclosure of glass in which plants are kept to protect them from cold air outside

(d) none of the above

Q-10)   BOD is connected with

(a) organic matter

(b) microbes and organic matter

(c) microbes

(d) None

Q-11)   Some statements about the benefits of organic farming are given below. Indicate whether they are true or false using the codes given below the statements :

1. It reduces CO₂ emissions.
2. It does not lead to toxic effects.
3. It improves the water-retention capacity of the soil.

Codes

(a) False - True - True

(b) True - False - False

(c) False - True - False

(d) False - True - True

Q-12)   Which one of the following substances is used in the manufacture of safety matches?

(a) Phosphorus trioxide (P203)

(b) White phosphorus

(c) Red phosphorus

(d) Black phosphorus

Q-13)   What is the composition of nitrolim – a chemical fertilizer?

(a) Calcium carbide and carbon

(b) Calcium carbide and nitrogen

(c) Nitrogen and limestone

(d) None of the above

Q-14)   Flint glass is obtained from which of the following?

(a) Sodium aluminum borosilicate

(b) Sand, red lead and potassium carbonate

(c) Zinc and barium borosilicate

(d) Pure silica and zinc oxide

Q-15)   Which one of the following is not contained in Portland cement ?

(a) Ca₂SiO₄

(b) Ca₃SiO₅

(c) Ca₃Al₂O₆

(d) Ca₃(PO₄)₂

Q-16)   It is said, the Tajmahal may be destroyed due to –

(a) Air pollutants released from oil refinery of Mathura

(b) Decomposition of marble as a result of high temperature

(c) Flood in Yamuna river

(d) All the above

Q-17)   Which one of the following statements about ozone and ozone layer is true?

(a) The conversion of ozone to oxygen is an endothermic reaction

(b) Ozone has a triatomic linear molecule

(c) Ozone layer is beneficial to us because ozone cuts out the ultraviolet radiation of the sun

(d) None of these

Q-18)   Which one of the following statements about ozone and ozone layer is true?

(a) The conversion of ozone to oxygen is an endothermic reaction

(b) Ozone layer is beneficial to us because ozone cuts out the ultraviolet radiation of the sun

(c) Ozone has a triatomic linear molecule

(d) None

Q-19)   Which of the following is the major cause of global warming?

(a) re-radiation of I.R. rays by O₂ and N₂

(b) re-radiation of I.R. rays by CO₂ and H₂O

(c) re-radiation of U.V. rays by CO₂ and H₂O

(d) re-radiation of U.V. rays by O₂ and N₂

Q-20)   Dinitrogen and dioxygen are main constituents of air but these do not react with each other to form oxides of nitrogen because __________.

(a) the reaction can be initiated only in presence of a catalyst.

(b) oxides of nitrogen are unstable.

(c) the reaction is endothermic and requires very high temperature.

(d) N₂ and O₂ are unreactive.