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Question 803

The element common to all acids is :

AOxygen

BHydrogen

CNitrogen

DSulphur

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B. HydrogenExplanation: The element hydrogen is common to all acids. Acids are substances that produce hydrogen ions (H⁺) or hydronium ions (H₃O⁺) when dissolved in water. This property gives acids their characteristic sour taste, the ability to turn blue litmus paper red, and to react with bases to form salts and water. Examples include hydrochloric acid (HCl), sulphuric acid (H₂SO₄), and nitric acid (HNO₃)—all of which release hydrogen ions in aqueous solution.

Question 802

Which of the following processes is responsible for transforming liquid into vapour ?

ACondensation

BEvaporation

CTranspiration

DSublimation

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B. EvaporationExplanation not yet available.

Question 801

The intensity of earthquake is measured by :

ABarometer

BHydrometer

CPolygraph

DSeismograph

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D. SeismographExplanation: The intensity and magnitude of an earthquake are measured using a scientific instrument called a seismograph. It records the vibrations or seismic waves produced by earthquakes. The data obtained from a seismograph are used to calculate the earthquake’s strength on scales such as the Richter Scale or the Moment Magnitude Scale. The seismogram (the recorded graph) shows the amplitude and duration of the waves, helping scientists locate the earthquake’s epicenter and determine its severity.

Question 800

Chemical name of 'Baking powder' is :

AAmmonium Chloride

BMagnesium Phosphate

CSodium bi-carbonate

DAmmonium bi-phosphate

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C. Sodium bi-carbonateExplanation: The chemical name of baking powder is sodium bicarbonate (NaHCO₃), also known as baking soda. It is a mild alkali used in cooking and baking as a leavening agent. When heated or mixed with an acid (like vinegar, lemon juice, or cream of tartar), it decomposes to release carbon dioxide gas (CO₂). The bubbles of CO₂ make the dough rise and become soft and spongy. In commercial baking powder, sodium bicarbonate is often mixed with a weak acid and a drying agent.

Question 799

Which of the following gases constitutes the major portion of the atmosphere by volume ?

AOxygen

BArgon

CNitrogen

DCarbon dioxide

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C. NitrogenExplanation: Nitrogen (N₂) constitutes the major portion of the Earth's atmosphere by volume — about 78%. It is a colorless, odorless, and inert gas that plays a vital role in maintaining atmospheric stability and supporting life through the nitrogen cycle. Oxygen makes up about 21% of the atmosphere and is essential for respiration and combustion. Other gases like argon (~0.93%) and carbon dioxide (~0.04%) are present in much smaller amounts.

Question 798

The name of the river Brahmaputra in Tibet is:

ATista

BTsangpo

CYamuna

DSubansiri

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B. TsangpoExplanation not yet available.

Question 797

'Sainik School' in Assam is located at

ATinsukia

BGoalpara

CJorhat

DNunmati

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B. GoalparaExplanation not yet available.

Question 796

The biggest power plant in NE region of India is situated in the state :

AAssam

BTripura

CSikkim

DManipur

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B. TripuraExplanation not yet available.

Question 795

Rumtek Monastery is located in :

AArunachal Pradesh

BMeghalaya

CSikkim

DNone of these

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C. SikkimExplanation not yet available.

Question 794

'Tipaimukh Dam' is situated in the state of :

ANagaland

BMeghalaya

CArunachal Pradesh

DManipur

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D. ManipurExplanation not yet available.

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Explore the question bank

The element common to all acids is :

Which of the following processes is responsible for transforming liquid into vapour ?

The intensity of earthquake is measured by :

Chemical name of 'Baking powder' is :

Which of the following gases constitutes the major portion of the atmosphere by volume ?

The name of the river Brahmaputra in Tibet is:

'Sainik School' in Assam is located at

The biggest power plant in NE region of India is situated in the state :

Rumtek Monastery is located in :

'Tipaimukh Dam' is situated in the state of :

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