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Question 2028

When was Edusat launched ?

AOctober, 1988

BJune, 2001

CSeptember, 2004

DMarch 2008

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C. September, 2004Explanation: EDUSAT (Education Satellite) was launched by the Indian Space Research Organisation (ISRO) in September 2004. It was the first Indian satellite built exclusively for educational purposes, designed to provide distance learning and interactive education through satellite communication.

Question 2027

Which of the following is not a viral disease ?

ATuberculosis

BPolio

CSwine flu

DHepatitis

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A. TuberculosisExplanation: Tuberculosis (TB) is not a viral disease; it is caused by a bacterium called Mycobacterium tuberculosis. In contrast, Polio, Swine flu, and Hepatitis are viral diseases caused by different types of viruses.

Question 2026

Which of the following lenses would you prefer to read small letters in a dictionary ?

AA convex lens of focal length 50 cm

BA concave lens of focal length 50 cm

CA convex lens of focal length 5 cm

DA concave lens of focal length 5 cm

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C. A convex lens of focal length 5 cmExplanation: To read small letters, a convex lens (converging lens) with a short focal length such as 5 cm is used as a magnifying glass. It produces an enlarged, upright, and virtual image of the object, making tiny text appear bigger and clearer to the eye.

Question 2025

Which of the following is not a renewable source of energy ?

ANatural gas

BGeothermal energy

CFlowing water

DBiomass

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A. Natural gasExplanation: Natural gas is not a renewable source of energy because it is a fossil fuel formed over millions of years from the remains of plants and animals. Once used, it cannot be replenished quickly. In contrast, geothermal energy, flowing water, and biomass are renewable energy sources that can be naturally regenerated.

Question 2024

Which of the following is not a property of acids ?

AAll acids have sour taste

BAll acids are corrosive in nature

CFor acidic solutions pH =

DAcids turn red litmus to blue

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D. Acids turn red litmus to blueExplanation: Acids do not turn red litmus to blue; instead, they turn blue litmus paper red. Acids are sour in taste, corrosive in nature, and have a pH value less than 7. Therefore, the statement that acids turn red litmus to blue is incorrect.

Question 2023

Which of the following cell organelles is referred to as the 'suicidal bags' or 'disposal units' ?

ALysosome

BPeroxisomes

CGlyoxisomes

DMitochondria

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A. LysosomeExplanation: Lysosomes are known as the ‘suicidal bags’ or ‘disposal units’ of the cell because they contain powerful hydrolytic enzymes capable of breaking down worn-out cell organelles, foreign substances, and even the entire cell when it becomes damaged or diseased.

Question 2014

Which of the following contains maximum carbon dioxide ?

AGrasslands

BForests

COceans

DAgroecosystems

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C. OceansExplanation: Oceans contain the maximum amount of carbon dioxide (CO₂) on Earth. They act as the largest carbon sink, absorbing CO₂ from the atmosphere and storing it in dissolved form or as carbonates. This helps regulate the global carbon cycle and maintain atmospheric balance.

Question 2011

What chemicals are used in fire extinguishers used in houses and offices ?

AWater, potassium bicarbonate and fluorocarbon

BWater, calcium hydroxide and chlorofluorocarbons

CWater, potassium hydroxide and chlorobenzene

DNone of these

Show answer

A. Water, potassium bicarbonate and fluorocarbonExplanation: Fire extinguishers commonly used in houses and offices contain water, potassium bicarbonate (KHCO₃), and fluorocarbons. These chemicals help in extinguishing fires by cooling, cutting off oxygen supply, and preventing the spread of flames without leaving harmful residues.

Question 2010

In which direction a rainbow is formed ?

AAbove the sun

BBelow the sun

COpposite to the sun

DAt the level of the sun

Show answer

C. Opposite to the sunExplanation: A rainbow is formed in the part of the sky opposite to the Sun. It occurs when sunlight is refracted, internally reflected, and dispersed by raindrops, splitting the light into its seven constituent colors. The observer must have the Sun behind them and rain in front to see the rainbow clearly.

Question 2009

Which of the following statements is correct ?

ARed insulated wire is called 'live' wire

BBlack insulated wire is called 'neutral' wire

CGreen insulated wire is called 'earthing'

DAll of the above

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D. All of the aboveExplanation: In household electrical wiring, all the given statements are correct: the red insulated wire is the live (phase) wire, the black insulated wire is the neutral wire, and the green insulated wire is used for earthing to ensure safety by preventing electric shocks.

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Science

When was Edusat launched ?

Which of the following is not a viral disease ?

Which of the following lenses would you prefer to read small letters in a dictionary ?

Which of the following is not a renewable source of energy ?

Which of the following is not a property of acids ?

Which of the following cell organelles is referred to as the 'suicidal bags' or 'disposal units' ?

Which of the following contains maximum carbon dioxide ?

What chemicals are used in fire extinguishers used in houses and offices ?

In which direction a rainbow is formed ?

Which of the following statements is correct ?

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