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Science

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Question 3795

Curie point is the temperature at which:

Amatter becomes radioactive

Ba metal loses magnetic properties

Ca metal loses conductivity

Dtransmutation of metal occurs

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B. a metal loses magnetic propertiesExplanation: The Curie point (or Curie temperature) is the temperature above which a ferromagnetic material loses its magnetic properties and becomes paramagnetic. At this point, thermal energy overcomes the magnetic alignment of atoms. For example, the Curie temperature of iron is about 770°C.

Question 3794

Tetraethyl lead (TEL) is

Aa catalyst used in burning fossil fuel

Ban antioxidant

Ca reductant

Dan antiknock compound

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D. an antiknock compoundExplanation not yet available.

Question 3793

The art and science of map making is called:

Aremote sensing

Bcartography

Cphotogrammetry

Dmapping

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B. cartographyExplanation not yet available.

Question 3792

What changes will happen to a ball of ice and water kept at exactly zero degree Celsius?

AAll ice will melt

BAll water will become ice

CNo change will happen

DOnly some ice will melt

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C. No change will happenExplanation not yet available.

Question 3791

The bats can fly in the dark because:

Athey can see the objects in darkness

Bthey have weak legs and are likely to be attacked by predators

Cthey generate flashes of light

Dthey generate ultrasonic sound waves

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D. they generate ultrasonic sound wavesExplanation not yet available.

Question 3790

Heat transfer horizontally within the atmosphere is called:

Aconduction

Bconvection

Cabsorption

Dadvection

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D. advectionExplanation not yet available.

Question 3789

Animals living in the tree trunks are known as:

Aarboreal

BVolant

CAmphibious

DAquatic

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A. arborealExplanation: Animals that live in or on trees are called arboreal animals. They are adapted to climbing and moving about among branches. Examples include monkeys, squirrels, chameleons, and tree frogs. Their adaptations may include grasping limbs, prehensile tails, claws, or adhesive pads that help them cling to tree surfaces and move efficiently among branches.

Question 3788

In which of the following processes energy is released ?

Arespiration

Bphotosynthesis

Cingestion

Dabsorption

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A. respirationExplanation: Respiration is a biochemical process in which food molecules (mainly glucose) are oxidized to release energy in the form of ATP (adenosine triphosphate). This energy is then used for various life processes such as movement, growth, repair, and maintenance. Respiration occurs in all living cells and takes place mainly inside the mitochondria. Chemical Equation: C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + Energy (ATP) In contrast, photosynthesis stores energy in glucose molecules, while respiration releases that stored energy for cellular use.

Question 3787

Which of the following is not a property of heavy water ?

ABoiling point of heavy water is lower than that of ordinary water

Bdensity of heavy water is higher than that of ordinary water

Cfreezing point of heavy water is higher than that ordinary water

Dit produces corrosion

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A. Boiling point of heavy water is lower than that of ordinary waterExplanation not yet available.

Question 3786

Which one of the following is called the 'power house' of the cell ?

AGolgi body

BMitochondrion

CRibosome

DLysosome

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B. MitochondrionExplanation: Mitochondria are double-membraned organelles found in almost all eukaryotic cells. They are known as the 'power house of the cell' because they generate adenosine triphosphate (ATP) through the process of cellular respiration. The inner membrane forms folds called cristae, which increase the surface area for enzyme activity related to energy production. Mitochondria also contain their own DNA and ribosomes, enabling them to produce some of their own proteins. Key Reaction: Glucose + Oxygen → Carbon dioxide + Water + ATP

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Science

Curie point is the temperature at which:

Tetraethyl lead (TEL) is

The art and science of map making is called:

What changes will happen to a ball of ice and water kept at exactly zero degree Celsius?

The bats can fly in the dark because:

Heat transfer horizontally within the atmosphere is called:

Animals living in the tree trunks are known as:

In which of the following processes energy is released ?

Which of the following is not a property of heavy water ?

Which one of the following is called the 'power house' of the cell ?

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