CDS 1 2021 General Knowledge Question Paper with Answer Key Download PDF

Ans. B.

Gold (Au) has both malleability and ductility properties. The elements which tend to form positive ions are called metals. They are luster, ductile, malleable, a good conductor of heat and electricity, and high melting and boiling points. Metals are also solid at room temperature except for mercury. They have high tensile strength. They are usually hard, except sodium, potassium. They act as reducing agents. They displace hydrogen from acids. They react with water to evolve hydrogen gas.

Ans. D.

Iodine is a non-metal, but it is lustrous. It’s because iodine going down the size of the atom is increase and shielding effect of the atom and outermost electron decrease. So that iodine becomes excited by absorbing heat energy, and they emit light. So iodine appears to have a lustrous surface but this element is not a metal.

Note-Carbon is also showing lustrous but only in certain forms of diamond, and graphite.

Ans. B.

Nanotechnology is the field of research and study of very minute things which can be applied across all the science fields, such as chemistry, biology, physics, materials science, etc. Nanotechnology can be defined as the study and use of those structures whose size is in between 1 nanometre and 100 nanometres.

Ans. C.

Weight is a synonym of force that acts at all the times on all objects on the ground. It is the universal force of attraction. The Earth pulls on all objects with a force of gravity downward towards the centre of the Earth. This shows that the weight of an object is due to the force that it exerts on the ground.

Ans. D.

Objects in uniform circular motion move along with a circular pathway at a constant speed, so the acceleration can be point perpendicular to the velocity for a change in the direction only. The acceleration vector must point inward toward the centre to turn the object back onto the circular path.

Ans. B.

A Primary rainbow is a coloured bow or arc that appears on a “screen” of water drops when light from a bright light source fall upon them. It happens when a sunbeam is being refracted twice and reflected once by the droplet, a primary rainbow will form. So, there is only one total internal reflection of light in water droplets that takes place in the formation of the primary rainbow.

Ans. D.

Ans. C.

The heating effect of electric current was discovered by James Prescott Joules. When an electric current pass through a conductor, the conductor becomes hot and gives rise to heat after some time. It is due to the conversion of some electric energy while passing through the conductor into heat energy. This effect of electric current is known as the heating effect of current.

Ans. B.

A parabolic mirror is a specially designed mirror that is used to capture and focus energy onto a single point. These are also used for distributing the energy from one point to multiple points. Parabolic mirrors can be defined as parabolic reflectors or as parabolic dishes. A parabolic mirror is the most common non-spherical mirror. That’s why a non-spherical shining spoon can generally be considered as a parabolic mirror.

Ans. C.

Electric charges can flow easily through conductors. The human body is an electric conductor as it contains various salts dissolved in their blood. The cells of a human body contain various ions such as sodium ion, potassium ion, chloride ion, etc. which helps to conduct electricity. A plastic sheet, distilled water and wood are good electrical insulator but not conductors.

Ans. D.

Resistivity is defined as an electric resistance of a conductor of the unit cross- sectional area and unit length. Its unit is ohm meter. A characteristic property of each material, resistivity is used to differentiate various materials based on their ability to conduct electric currents. The value of resistivity depends on the temperature of the material. The resistivity of metallic conductors usually increases with a temperature rise.

The electrical resistivity can be defined as an electrical resistance per unit length and per unit of cross-sectional area at a specified temperature. Copper is a good conductor of electricity as it provides a low level of resistivity. Thus, all three copper wires of different lengths and different areas of the cross-section will have the same resistivity.

Ans. A.

McLeod British firms were taken over by Soorajmull-Nagarmull group.

Ans. D.

François Bernier was a French physician and traveller. He was born in Joue-Etiau in Anjou. He was briefly personal physician to Mughal prince Dara Shikoh, the eldest son of the Mughal emperor Shah Jahan, and after the execution of Dara Shikoh, was attached to the court of the Mughal emperor Aurangzeb, for around twelve years during his stay in India.

ANS B

Ans. B.

Fiscal Deficit is the excess of total expenditure over total receipts excluding borrowings. In other words, it gives the amount needed by the government to meet its expenses. Therefore, a large Fiscal Deficit signifies a large borrowings.

Primary Deficit is Fiscal Deficit of the present year minus interest payments on previous borrowings. Whereas Fiscal Deficit represents the government’s total borrowing involving interest payments, it shows the amount of borrowing excluding interest payments.

The current account deficit is a measurement of a nation’s trade where the value of the goods &services it imports exceeds the value of the products it exports.

A capital account deficit takes place when the equity in a business turns negative. This signifies that the total amount of liabilities exceeds the total amount of assets.

Ans. A.

A recessionary gap occurs when real GDP is less than potential GDP and which brings a falling price level. A recessionary gap occurs when the SRAS (Short Run Aggregated Supply) curve and the AD (Aggregate Demand) curve intersect to the left of the potential GDP line.

An inflationary gap is a macroeconomic phenomenon that measures the difference between the current level of real GDP and the GDP that would exist if an economy was operating at full employment.

The Demand-pull inflation is inflation that starts due to aggregate demand increases. The Demand-pull inflation can be started by any of the factors which increase aggregate demand, but can only be sustained by growth in the quantity of money.

The Cost-push inflation is inflation which begins with an increase in cost. The two major sources of cost increases are increases in the money wage rate & increases in the money prices of raw materials, like oil.

Ans. D.
Money has taken various forms through the ages, but money consistently has three functions, they are:

• Store of value
• Unit of account
• Medium of exchange

The present-day economies use fiat money-money that is neither a commodity nor represented or ‘backed’ by a particular commodity. Even forms of money which share these function may be more or less useful based on the characteristics of money.

Ans. D.

Marmagao Port, located at the entrance of the Zuari estuary, is a natural harbour in Goa. The port gained significance after its remodelling in the year 1961 to handle iron-ore exports to Japan. The construction of Konkan railway has considerably extended the hinterland of this particular port. Goa, Karnataka, Southern Maharashtra constitute its hinterland

Ans. A.

There are more than 100 coffee species, but the main commercial varieties are Robusta, Arabica, and – to a lesser extent – Liberica. Robusta, Arabica, and Liberica are three common coffee beans used all over the world.

Coffee is considered more than a beverage. It has developed from an energising drink into an international phenomenon. When the plant of coffee, and the beans it produced, was first-ever discovered in Ethiopia in the tenth century, its fame quickly spread throughout the Arabian Peninsula and by the fifteenth-century coffee cultivation and trade was soaring, mainly in Yemen.

Ans. D.
The Black soil stretch over the parts of Maharashtra, Gujarat, Western parts of Madhya Pradesh, North- Western Andhra Pradesh, Karnataka, Rajasthan, Tamil Nadu, Chhattisgarh, Jharkhand up to Raj Mahal hills.
Below are the properties of Black soil:

• The Black soil has clayey texture and is highly fertile
• It is rich in calcium carbonate, magnesium, potash, and lime but poor in nitrogen &phosphorous
• It is highly retentive of moisture, extremely compact & tenacious when wet
• It is contractible and develops deep wide cracks on drying
• It is calcareous and neutral to mild alkaline in reaction
• It is high in carbon exchange capacity & low in organic matter
• It is self-ploughing and comparatively less fertile on the uplands than that of the lowlands.