Previous year MCQs

General science UPPSC 2019 GS-I
Question

Which of the following is an example of herbicide?

Answer & Solution

Answer: (Detailed Solution Below)

Option A: Sodium chlorate

Detailed Solution:

The correct answer is “Sodium chlorate”.
Sodium chlorate (NaClO₃) is an example of a herbicide.

Herbicides are chemicals used to control or kill plants, and sodium chlorate is a common active ingredient in various herbicide products. It is often used in agricultural applications to control weeds.

Similar Questions:

Pyrometer is used for measuring:
  1. A) Air Pressure
  2. B) Humidity
  3. C) High Temperature
  4. D) Intensity of Earthquake
Which one of the following pairs is correctly matched?
  1. A) Pneumonia - Lungs
  2. B) Cataract - Thyroid gland
  3. C) Jaundice - Eye
  4. D) Diabetes - Liver
The important metal used with iron to produce stainless steel is:
  1. A) aluminium
  2. B) chromium
  3. C) tin
  4. D) carbon
Which one of the following is the hardest metal?
  1. A) Gold
  2. B) Iron
  3. C) Platinum
  4. D) Tungsten
The "blue moon" phenomenon occurs:
  1. A) When two full moons occur in the same month
  2. B) When four full moons appear in two consecutive months of the same calendar year.
  3. C) when two full moons appear in the same month thrice in a calendar year
  4. D) None of the above.
Which of the following is a semi-conductor?
  1. A) Plastic
  2. B) Aluminium
  3. C) Wood
  4. D) Germanium
The environment modified by human activities is called:
  1. A) Natural environment
  2. B) Anthropogenic environment
  3. C) Urban environment
  4. D) Modern environment
Which one of the following is not correctly matched?
  1. A) Decibel–unit of loudness of sound
  2. B) Horse power–unit of power
  3. C) Nautical mile–unit of distance in navigation
  4. D) Celsius–unit of heat
Consider the following statements:

1. Scientific investigation depends on commitment to practical ideals.
2 Honesty is particularly important in science.

Select the correct answer from the codes given below:
  1. A) Both statements 1 and 2 are correct
  2. B) Both statements 1 and 2 are incorrect
  3. C) Statement 1 is correct, 2 is not correct
  4. D) Statement 1 is correct, 2 is unpredictable
Assertion (A): Woollen clothes keep us warm.
Reason (R): Wool fibres are made of a particular protein which is a bad conductor of heat.

Select the correct answer using the codes given below:
  1. A) Both A and R are true and R is the correct explanation of A
  2. B) Both A and R are true but R is not the correct explanation of A
  3. C) A is true but R is false
  4. D) A is false but R is true
We obtain turmeric from which part of the plant?
  1. A) Stem
  2. B) Root
  3. C) Fruit
  4. D) Flower
"Radioactive dating" is a technique which can be used to measure:
  1. A) the age of rocks
  2. B) composition of rocks
  3. C) colour of rocks
  4. D) weight of rocks