The basic component of photochemical smog is
The basic component of photochemical smog is
Options
(a) PBN (b) PAN (c) SO₂ (d) all of these
Correct Answer:
PAN
Explanation:
No explanation available. Be the first to write the explanation for […]
Chemistry
Biochemical oxygen Demand ,(BOD) is a measure of organic material present in water
Biochemical oxygen Demand ,(BOD) is a measure of organic material present in water.BOD value less than 5 ppm indicates a water sample to be
Options
(a) rich in dissolved oxygen (b) poor in […]
Which of the following practices will not come under green chemistry
Which of the following practices will not come under green chemistry
Options
(a) If possible,making use of soap made of vegetable oils instead of using synthetic detergents (b) using H₂O₂ for bleaching purpose […]
Which of the following statements is incorrect
Which of the following statements is incorrect
Options
(a) Textile workers suffer from white lung disease (b) Coal miners suffer from black lung disease (c) Beryllium compounds (BeCl₂) cause beryllosis (d) Asbestos causes […]
Which of the following is the coldest region
Which of the following is the coldest region
Options
(a) Troposphere (b) Mesosphere (c) Stratosphere (d) Thermosphere
Correct Answer:
Mesosphere
Explanation:
No explanation available. Be the first to write the explanation for this […]
Classical smong is found in
Classical smong is found in
Options
(a) winter during morning time (b) winter during day time (c) summer during day time (d) summer during morning time
Correct Answer:
winter during morning time
Explanation: […]
In which type of reaction oxygen is converted into ozone
In which type of reaction oxygen is converted into ozone
Options
(a) Oxidation (b) Reduction (c) Photochemical (d) Addition
Correct Answer:
Reduction
Explanation:
Ozone layer occurs in stratosphere.It prevents about 99.5% of the […]
Dinitrogen and dioxygen are main constituents of air but these do not react
Dinitrogen and dioxygen are main constituents of air but these do not react with each other to form oxides of nitrogen because
Options
(a) the reaction is endothermic and requires very high temperature […]
The recycling of plastic is done by
The recycling of plastic is done by
Options
(a) depolymerization (b) reoxidation (c) transformation (d) all of the above
Correct Answer:
depolymerization
Explanation:
Classical smong is called reducing smong.
Which of the following statements is correct
Which of the following statements is correct
Options
(a) Ozone hole is a hole formed in stratosphere from which ozone oozes out (b) Ozone hole is a hole formed in the troposphere from […]