Questions

The centre of the reflecting surface of a spherical mirror is a point called the ___.

A compressed spring possesses more energy than a spring of normal length because the compressed spring has

In the following question, a sentence has been given in Active/Passive voice. Out of the four alternatives suggested, select the one which best
expresses the same sentence in Passive/Active voice.
The theatre was keeping a seat for you.

In a market system, the central problems regarding how much and what to produce are solved through the coordination of economic activities brought about by ________ signals.

Anaerobic respiration refers to which of the following?

In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of thefour alternatives.

When the kerosene burned, the fuel in the tank below would be __________ pressure, and __________ a small circular flame would appear in the burner. The valve had tobe opened to let more kerosene vapour to the burner and pumping resumed. With the increase in pressure, the burner flame would spread _________ a loud noise. Tolower the flame, the valve had to be _________ opened to reduce the pressure and then tightened until the desired flame size was achieved. _________ you wanted theflame to be bigger, you had to hit the piston again. Pump stoves are still in vogue.

was achieved. _________ you wanted the flame

In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.

People would see bitcoin’s current price rise (1)/ as merely a reflection of their bright future (2)/ as a stateless currency. (3)/ No error. (4)

The side of an equilateral triangle is 8 cm. Find its area (in cm2).