April 17, 2024
Potassium Permanganate is used for purifying drinking water, because
  • (A) It is a sterilizing agent
  • (B) It is an oxidizing agent
  • (C) It is a reducing agent
  • (D) It dissolves the impurities of water
The gases used in different types of welding would include
  • (A) Oxygen, acetylene and argon
  • (B) Oxygen, hydrogen, acetylene and nitrogen
  • (C) Oxygen and hydrogen
  • (D) Oxygen and acetylene
Select the four statements about Plasmodium that are true.
A. Inside an infected mosquito, haploid gametes fuse, forming a diploid zygote that develops into an oocyst
B. Plasmodium cells infect two specific types of cells in humans.
C. Plasmodium cells are transferred to humans through mosquito saliva.
D. The complete life cycle of Plasmodium requires two hosts.
  • (A) A and B
  • (B) A and C
  • (C) B, C and D
  • (D) All of the above
The radioactive element most commonly detected in humans is
  • (A) Plutonium-238
  • (B) Cobait-60
  • (C) Iodine-131
  • (D) Potassium-40
Which of the following is likely during vigorous exercise?
  • (A) Blood will be diverted to the digestive organs.
  • (B) Capillaries of the active muscles will be engorged with blood.
  • (C) Blood flow to the kidneys increases.
  • (D) The skin will be cold and clammy
At present, scientists can determine the arrangement or relative positions of genes of DNA sequences on a chromosome. How does this knowledge benefit us?
1. It is possible to know the pedigree of livestock.
2. It is possible to understand the causes of all human diseases.
3. It is possible to develop disease-resistant animal breeds.
Which of the statements given above is/are correct?
  • (A) 1 and 2 only
  • (B) 2 only
  • (C) 1, 2 and 3
  • (D) 1 and 3 only
What does an airbag, used for the safety of a car driver, contain?
  • (A) Sodium Azide
  • (B) Sodium Bicarbonate
  • (C) Sodium Nitrite
  • (D) Sodium Peroxide
For Galvanizing Iron, which of the following Metals is used?
  • (A) Copper
  • (B) Aluminum
  • (C) Zinc
  • (D) Lead
The weight of an object will be minimum when it is placed at
  • (A) The South pole
  • (B) The Center of the earth
  • (C) The North Pole
  • (D) The Equator
Which of the following plants is not capable of manufacturing its own food?
  • (A) Mushroom
  • (B) Cabbage
  • (C) Carrot
  • (D) Algae
In fireworks, the green flame is produced because of
  • (A) Potassium
  • (B) Barium
  • (C) Sodium
  • (D) Mercury
Which of the following foods does not support bacterial growth?
  • (A) Cooked rice
  • (B) Raw Carrots
  • (C) Refried beans
  • (D) Sauted onions
Which one of the following types of waves are used in a night vision apparatus?
  • (A) Infra-red waves
  • (B) Microwaves
  • (C) None of the above
  • (D) Radio waves
A married couple adopted a male child. A few years later, twin boys were born to them. The blood group of the couple is AB positive and O negative. The blood group of the three sons is A positive, B positive, and O positive. The blood group of the adopted son is
  • (A) Cannot be determined on the basis of the given data
  • (B) O Positive
  • (C) A Positive
  • (D) B Positive
Which one of the following types of laser is used in laser printers?
  • (A) Semiconductor laser
  • (B) Gas laser
  • (C) Excimer
  • (D) Dye laser

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