Question Library
Browse our collection of questions across various subjects
General Knowledge
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Which one of the following is the correct relation between the Kelvin temperature (T) and the Celsius temperature (tₙ)?
CDS General Knowledge 2018
CDS 2018
General Knowledge
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Why is argon gas used along with tungsten wire in an electric bulb?
CDS General Knowledge 2018
CDS 2018
General Knowledge
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Consider the following chemical reaction : aFe₂O₃ (s) + bCO(g) → cFe(s) + dCO₂In the balanced chemical equation of the above,…
CDS General Knowledge 2018
CDS 2018
General Knowledge
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Which one of the following elements is essential for the formation of chlorophyll in green plants?
CDS General Knowledge 2018
CDS 2018
General Knowledge
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Which one of the following gases dissolves in water to give acidic solution?
CDS General Knowledge 2018
CDS 2018
General Knowledge
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Which one of the following elements is involved in the control of water content of the blood?
CDS General Knowledge 2018
CDS 2018
General Knowledge
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Which one of the following elements is used as a timekeeper in atomic clocks?
CDS General Knowledge 2018
CDS 2018
Mathematics
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What is the ratio of the area of a square inscribed in a semicircle of radius r to the area…
CDS Elementary Mathematics 2019
CDS 2019
Mathematics
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A piece of wire of length 33 cm is bent into an arc of a circle of radius 14 cm.…
CDS Elementary Mathematics 2019
CDS 2019
Mathematics
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A right circular cylinder has a diameter of 20 cm and its curved surface area is 1000 cm². What is…
CDS Elementary Mathematics 2019
CDS 2019
Mathematics
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A square is drawn such that its vertices are lying on a circle of radius 201 mm. What is the…
CDS Elementary Mathematics 2019
CDS 2019
Mathematics
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If the length of the hypotenuse of a right angled triangle is 10 cm, then what is the maximum area…
CDS Elementary Mathematics 2019
CDS 2019
Mathematics
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The length and breadth of a rectangle are increased by 20% and 10% respectively. What is the percentage increase in…
CDS Elementary Mathematics 2019
CDS 2019
Mathematics
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Two cylinders of equal volume have their heights in the ratio 2:3. What is the ratio of their radii?
CDS Elementary Mathematics 2019
CDS 2019
Mathematics
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ABC is a triangle right angled at B. If AB = 5 cm and BC = 10 cm, then what…
CDS Elementary Mathematics 2019
CDS 2019
Mathematics
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All the four sides of a parallelogram are of equal length. The diagonals are in the ratio 1:2. If the…
CDS Elementary Mathematics 2019
CDS 2019
Mathematics
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An equilateral triangle and a square are constructed using metallic wires of equal length. What is the ratio of area…
CDS Elementary Mathematics 2019
CDS 2019
Mathematics
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Let two lines p and q be parallel. Consider two points B and C on the line p and two…
CDS Elementary Mathematics 2019
CDS 2019
Mathematics
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Suppose P, Q and R are the mid-points of sides of a triangle of area 128 cm². If a triangle…
CDS Elementary Mathematics 2019
CDS 2019
Mathematics
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A piece of wire is in the form of a sector of a circle of radius 20 cm, subtending an…
CDS Elementary Mathematics 2019
CDS 2019