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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 to 240 (D) 20 to 100 Answer: (C) 80 to 240... View Article

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... View Article

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 objective is a... 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 a. What is the amplitude at a distance l/3... View Article

Evaluate the following: 2 tan² 45° cos²30° sin²60°.

Solution: Rewriting the above equation, we get: Simplifying further, we get... View Article

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, 4) lies on the graph. Similarly, for y = 0, x = 6,... 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 The pulp... View Article

How many legs do insects have?

Adult insects have six legs.... View Article

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 A and B are correct Answer: (B) Clayey Soil... 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. Place the glass in the middle of a... 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 is determined by the frequency of the wave.... 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 from all directions. Therefore,... 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 respectively, the effective... 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°... View Article

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 rock. Over time, they are... 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 f) Roughage Answer: a) Proteins -... 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 views to boost... 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 N and 14 N Answer: 1) 6 N and 10 N Solution: Given, Sum of two forces is... 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 -------(1) A = 6N, B = 2N... 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... View Article

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