Previous year MCQs

General science UPPSC 2006 GS-I
Question

The most toxic metal pollutant of auto mobile exhaust is

Answer & Solution

Answer: (Detailed Solution Below)

Option B: Lead

Detailed Solution:

The correct answer is “Lead”.
The most toxic metal pollutant of automobile exhaust is: (2) Lead

Lead was historically used in gasoline as an anti-knock additive, but its use has been largely phased out due to its toxicity. However, lead contamination from older vehicles and other sources remains a concern in some areas.

Similar Questions:

White colour of milk is due to the presence of
  1. A) lactose
  2. B) albumins
  3. C) carotenes
  4. D) caseins
The stench due to leakage from the LPG cylinder is because of:
  1. A) Methane
  2. B) Propane
  3. C) Butane
  4. D) Ethyl mercaptan
Which of the following tree is suitable to prevent dust pollution?
  1. A) Sita Ashok
  2. B) Mahua
  3. C) Poplar
  4. D) Neem
Bhopal Gas Tragedy was caused due to the leakage of:
  1. A) Methyl Isocynate
  2. B) Nitrogen dioxide
  3. C) Sulphur dioxide
  4. D) Carbon monoxide
Which is the smallest gland in human body?
  1. A) Adrenal
  2. B) Thyroid
  3. C) Pancreas
  4. D) Pineal
Nitrogen fixing bacteria make combination with cell of the root of:
  1. A) Pulses
  2. B) Rice
  3. C) Wheat
  4. D) Sugarcane
Given below are two statements:

Assertion (A): Powers for conducting elections to the Parliament and State Legislatures in a free and fair manner have been given to an independent body i.e. the Election Commission.

Reason (R): Powers of removal of Election Commissioners is with the executive.

In the context of above, which one of the following is correct?
Code:
  1. A) Both A and R are true and R is the true explanation of A
  2. B) Both A and R are true but R is not the true explanation of A
  3. C) A is true but R is false
  4. D) A is false but R is true
Which one of the following is not correctly matched:
  1. A) Isobar - atmospheric pressure
  2. B) Isohyet - Rainfall
  3. C) Isoheline - snowfall
  4. D) Isobath - depth
Which one of the following areas of India does not come under the zone of high seismic intensity?
  1. A) Uttaranchal
  2. B) Karnataka Plateau
  3. C) Kachch
  4. D) Himachal Pradesh
I.C. chips for computers are usually made of:
  1. A) leaf
  2. B) chromium
  3. C) silicon
  4. D) gold
To avoid "knocking" of the engine of a car, which one of the following is used as an anti-knocking agent?
  1. A) Ethyl alcohol
  2. B) Butane
  3. C) Lead Tetra Ethyl
  4. D) White petrol
Which of the following is NOT obtained from insects?
  1. A) Silk
  2. B) Honey
  3. C) Lac
  4. D) Pearl