Q: In a society the growth and development that meets the current human needs and also conserves natural resources for future generations is known as:

A: Green economy

B: Holistic development

C: Sustainable development

D: Subsistence agriculture



Correct Option: C  [ Sustainable development ]

Remark:

Sustainable Development refers to growth that meets the needs of the present without compromising the ability of future generations to meet their own needs. It aims to balance economic progress, social equity, and environmental protection by conserving natural resources and reducing pollution for long-term ecological stability.

  • Green economy: Focuses mainly on eco-friendly industries.
  • Holistic development: Emphasizes overall human and social growth.
  • Subsistence agriculture: Involves farming mainly for self-consumption.


Q: Normal human blood is:

A: Acidic

B: Alkaline

C: Neutral

D: Variable



Correct Option: B  [ Alkaline ]

Remark:

Explanation: Normal human blood has a slightly alkaline pH of 7.35 to 7.45. This pH is maintained by buffer systems such as the bicarbonate buffer system and controlled by the lungs (CO₂ regulation) and kidneys (acid-base balance). A deviation from this range can be life-threatening — acidosis occurs if pH falls below 7.35, and alkalosis occurs if it rises above 7.45.


Q: Brass gets discoloured in air due to constant exposure in presence of:

A: Aluminium sulphide

B: Aluminium phosphide

C: Hydrogen sulphide

D: Hydrogenated wafers



Correct Option: C  [ Hydrogen sulphide ]

Remark:

Explanation: Brass, an alloy of copper and zinc, gets discoloured when exposed to air containing hydrogen sulphide (H₂S). The H₂S reacts with the metal surface to form a dark layer of metal sulphides (mainly copper sulphide), causing tarnishing and loss of shine.


Q: What is the meaning of the word 'Tsunami' in Japanese?

A: High waves

B: Destructive waves

C: Harbour waves

D: none of these



Correct Option: C  [ Harbour wave ]

Remark:
Indian Ocean Tsunami occurred on 26 December, 2004 with an epicentre off the west coast of Sumatra, Indonesia.


Q: Adult Filaria worms live in human:

A: Blood

B: Lymphatics

C: Liver

D: Intestine



Correct Option: B  [ Lymphatics ]

Remark:

Explanation: The adult filarial worm, Wuchereria bancrofti (and Brugia malayi), lives in the lymphatic vessels and lymph nodes of humans. These worms block the lymphatic system, causing a condition known as lymphatic filariasis or elephantiasis, characterized by severe swelling of legs, arms, or genitals. The disease is transmitted by the bite of infected Culex mosquitoes, which carry t


Q: Entomology is the science that studies:

A: The origin and history of technical and scientific terms.

B: Insects

C: The formation of Rocks

D: Behavoiur of human beings



Correct Option: B  [ Insects ]

Remark:

Explanation: Entomology is a branch of Zoology that focuses on the study of insects, including their structure, classification, behavior, ecology, and evolution. Insects make up more than 75% of all known animal species on Earth and play crucial roles in pollination, decomposition, and food chains. Scientists who study insects are known as entomologists.


Q: J J Thomson received the Nobel Prize in Physics for the discovery of ________.

A: Protons

B: Electrons

C: Neutrons

D: Positrons



Correct Option: B  [ Electrons ]

Remark:


Q: A man inside a moving train tosses a coin, the coin falls behind him. The train is moving:

A: forward with a uniform speed

B: backward with a uniform speed

C: forward with deceleration

D: forward with acceleration



Correct Option: D  [ forward with acceleration ]

Remark:

Explanation: When a man inside a moving train tosses a coin and it falls behind him, it means the train is moving forward with acceleration. The coin, after being tossed, continues to move with the train’s initial velocity, but since the train speeds up, the coin appears to fall backward relative to the man.


Q: Rainbow is formed due to a combination of:

A: refraction and absorption

B: dispersion and diffraction

C: refraction and scattering

D: dispersion and total internal reflection



Correct Option: D  [ dispersion and total internal re?ection ]

Remark:

Explanation: A rainbow is formed due to the dispersion of sunlight into its constituent colors and total internal reflection inside water droplets in the atmosphere. The light entering a droplet is refracted, reflected internally, and then refracted again as it exits, producing the beautiful spectrum of colors.


Q: What is the name of a technology that allows telephone calls to be made over computer networks like the internet?

A: VoIP

B: GSM

C: Modem

D: CDMA



Correct Option: A  [ VoIP ]

Remark:

Explanation: VoIP (Voice over Internet Protocol) is a technology that allows users to make telephone calls over the Internet instead of traditional telephone lines. It converts voice signals into digital data packets and transmits them through computer networks, enabling cost-effective communication worldwide.
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