IAS/IPS Prelims General Awareness - Chemistry Multiple Choice Questions and Answers

(1) Which one of the following is produced during the formation of photochemical smog ?

[A] Nitrogen oxide

[B] Methane

[C] Ozone

[D] Hydrocarbons

Comment

Answer: Option [A]

(2) What is Bisphenol A (BPA) ?

[A] A special type of alloy steel

[B] A medical test for detecting cancer

[C] A chemical used for the development of food packaging materials

[D] A test for testing the use of drugs to improve performance by athletes

Comment

Answer: Option [C]

(3) Which one of the following is the correct sequence in increasing order of molecular weights of the hydrocarbons ?

[A] Butane, propane, ethane and methane

[B] Butane, ethane, propane and methane

[C] Propane, butane, ethane and methane

[D] Methane, ethane, propane and butane

Comment

Answer: Option [D]

(4) Barium in a suitable form is administered to patients before an X-ray examination of the stomach, because

[A] barium salts are white in colour and this helps the stomach to appear clearly in contrast with other regions in the picture

[B] barium is a good absorber of X-rays and this helps the stomach to appear clearly in contrast with the other regions in the picture

[C] barium is a good absorber of y-rays and this helps the stomach to appear clearly in contrast with the other regions in the picture

[D] barium allows X-rays to pass through the stomach on account of its transparency to X-rays

Comment

Answer: Option [B]

(5) The difference between a nuclear reactor and an atomic bomb is that

[A] the chain reaction in nuclear reactor is controlled

[B] the chain reaction in nuclear reactor is not controlled

[C] no-chain reaction takes place in atomic bomb while it takes place in nuclear reactor

[D] No chain reaction takes place in nuclear reactor while in the atomic bomb there is a chain reaction

Comment

Answer: Option [A]

(6) Which one of the following statements is correct ?

[A] Liquid sodium is employed as a coolant in nuclear reactors

[B] Calcium carbonate is an ingredient of tooth paste

[C] Bordeaux mixture consists of sodium sulphate and lime

[D] Zinc amalgams are used as a dental filling

Comment

Answer: Option [A]

(7) The most reactive among the halogens is

[A] Iodine

[B] Bromine

[C] Chlorine

[D] Fluorine

Comment

Answer: Option [D]

(8) Aluminium surface are often ‘anodized’. This means the deposition of a layer of

[A] Zinc oxide

[B] Nickel oxide

[C] Aluminium oxide

[D] Chromium oxide

Comment

Answer: Option [C]

(9) Excessive release of the pollutant carbon monoxide (CO) into the air may produce a condition in which Oxygen supply in the human body decreases. What causes this condition ?

[A] When inhaled into the human body CO is converted into CO₂

[B] The inhaled CO has much higher affinity for haemoglobin as compared to Oxygen

[C] The inhaled CO destroyed the chemical structure of haemoglobin

[D] The inhaled CO adversely affects the respiratory centre in the brain

Comment

Answer: Option [B]

(10) Regarding “carbon credits”, which one of the following statements is not correct ?

[A] The carbon credits system was ratified in conjunction with the Kyoto Protocol.

[B] The goal of the carbon credit system is to limit the increase of carbon dioxide emission.

[C] Carbon credits are traded at a price fixed from time to time by the United Nations Environment Programme.

[D] Carbon credits are awarded to countries or groups that have reduced greenhouse gases below their emission quota.

Comment

Answer: Option [C]

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