UPSC CAPF Previous Year GK Questions

Baking soda, sodium hydrogen carbonate, is a mild base, so a small amount shifts fresh milk, whose pH is about 6.6, slightly above 7.

Ethyne, C2H2, has its two carbon atoms joined by a triple bond, each carbon also holding one hydrogen. Carbon has a valency of four.

The whole point of comparative advantage is that a country gains from trade even when it has no absolute advantage in any good.

The orange economy is another name for the creative economy. The term was popularised by a 2013 Inter-American Development Bank book, and orange was chosen because it is often linked with culture and creativity.

Gersoppa Falls, better known as Jog Falls, is where the Sharavati river plunges down the edge of the Western Ghats in Karnataka.

When one input is kept fixed and another is added again and again, each extra unit eventually adds less to output than the one before.

Adrenaline, released by the adrenal glands into the blood, speeds up the heart beat when the body faces stress or danger.

These are the five great elements, the Pancha Mahabhuta, that Indian philosophy saw as the building blocks of the physical world.

Water molecules are strongly polar, so they can pull apart the positive and negative ions of a salt and surround them.

A firm in perfect competition faces a perfectly elastic demand curve, but a monopolistically competitive firm faces a downward-sloping, fairly elastic one, not a perfectly inelastic one.

Statements 1 and 3 give the standard definitions, but the Worker Population Ratio counts the employed, not the unemployed. In India these measures come from the Periodic Labour Force Survey.

The anther is the top part of the stamen, the male organ of a flower, and pollen grains form inside it.

The alveoli are tiny air sacs at the end of the smallest airways, and oxygen and carbon dioxide pass through their walls.

Breaking calcium carbonate into quicklime and carbon dioxide needs a steady supply of heat, so the reaction absorbs energy. An endothermic reaction takes in heat from its surroundings, while an exothermic reaction gives heat out.

Platinum is a noble metal and does not combine with oxygen even when heated in air. Metals low in the reactivity series, such as gold and platinum, hold on to their electrons very firmly, so oxygen cannot pull them away under ordinary conditions.

Necessities and luxuries are matched correctly, but an inferior good has a negative income elasticity, not a positive one. Income elasticity of demand is the percentage change in quantity demanded divided by the percentage change in income.

A large central vacuole filled with sap presses the cytoplasm against the cell wall, keeping the cell firm, or turgid.

Annelids such as the earthworm, leech and Nereis are the first coelomates in the usual sequence: their body cavity is lined on all sides by mesoderm.

No pathway of respiration in living cells turns glucose into methanol. Glucose is first split in the cytoplasm into two molecules of pyruvate; this step, glycolysis, is common to all cells.

Of the four options, oxygen is by far the most plentiful element; it makes up about 46% of the Earth's crust by mass.