Heat evolved during chemisorption lies in the range of
Heat evolved during chemisorption lies in the range of _____. (A) 20 to 40 (B) 40 to 80 (C) 80... View Article
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In a thermodynamic process pressure of a fixed mass of a gas is changed in such a manner that the gas molecule give out 30 joule of heat and 10 joule of work is done on the gas. If the initial internal energy of the gas was 40 joule, then the final internal energy will be:
Answer (D) 42 J
Which of the following is correct about astronomical telescope?
Which of the following is correct about astronomical telescope? (a) The image produced by the telescope is inverted (b) Its... View Article
A string of length l is fixed at both ends
A string of length l is fixed at both ends. H is vibrating in its 3rd overtone with maximum amplitude... View Article
Evaluate the following: 2 tan2 45° cos230° sin260°.
Solution: \(\begin{array}{l}2tan^{2}45^{\circ}+cos^{2}30^{\circ}-Sin^{2}60^{\circ}\end{array} \) Rewriting the above equation, we get: \(\begin{array}{l}2(tan45^{2}+cos30^{2}-Sin60^{2})\end{array} \) Simplifying further, we get \(\begin{array}{l}2(1)+(\frac{\sqrt{3}}{2})^2-(\frac{\sqrt{3}}{2})^2=2\end{array} \)
Draw the graph of the equation 2x – 3y = 12. At what point does the graph of the equation cuts the x axis and y axis?
Solution: Modify the equation as follows: y = (12 – 2x)/3 For x = 0, y = 4, therefore, (0,... View Article
Pulp cavity of teeth is lined by
The pulp cavity of teeth is lined by _____. (A) Osteoblast (B) Chondrobast (C) Odontoblast (D) Amylobast Answer: (C) Odontoblast... View Article
How many legs do insects have?
Adult insects have six legs.
Which soil is richest in humus
Which of the following soils is richest in Hummus? (A) Loamy Soil (B) Clayey Soil (C) Sandy Soil (D) Both... View Article
How will you remove chlorophyll from a leaf?
One can remove chlorophyll by following the below steps in order: Pour a cup of rubbing alcohol into a glass.... View Article
Which wave property determines : (a) loudness (b) pitch
(a) The loudness of sound is defined by the amplitude of the sound wave. (b) The pitch of the sound... View Article
What is diffused sunlight and its role of reaction?
Diffused light is a faint light with neither glare nor the intensity of direct light. It is diffused and emanates... View Article
Two metal wires of identical dimension are connected in series
Two metal wires of identical dimension are connected in series. If σ1 and σ2 are the conductivities of metal wires... View Article
If the magnitude of the sum of two vectors is equal to the magnitude of the difference of the two vectors, then the angle between these vectors is
The angle between these vectors will be a) 0° b) 45° c) 90° d) 180° Answer: c) 90°
How are Beaches formed? Name some Beaches.
Beaches are formed when waves deposit sand and gravel along the shoreline. Some beaches are made up of pebbles and... View Article
Name two sources for each of the following
Name two sources for each of the following: a) Proteins b) Carbohydrates c) Fats d) Vitamin A e) Vitamin C... View Article
22 July 2021: The Hindu Analysis
UPSC Current Affairs Preparation: The Hindu Analysis Watch expert analysis of ‘The Hindu’ dated 22 Jul 2021. Important news and... View Article
The sum of two forces acting at a point is 16 N. If the resultant force is 8 N and its direction is perpendicular to smaller force then the forces are
1) 6 N and 10 N 2) 8 N and 7 N 3) 4 N and 12 N 4) 2... View Article
Two forces 3 N and 2 N are at an angle θ such that the resultant is R. The first force is now increased to 6 N and the resultant become 2R. The value of θ is
1) 30° 2) 60° 3) 90° 4) 120° Answer: 4) 120° Solution: A = 3 N, B = 2 N then... View Article
Three concurrent forces of the same magnitude are in equilibrium. What is the angle between the force? Also, name the triangle formed by the forces as sides
1) 60° equilateral triangle 2) 120° equilateral triangle 3) 120°, 30°, 30° an isosceles triangle 4) 120° an obtuse-angled triangle... View Article
