Questions

Which of the following scientists had done some calculations for the fifth state of matter?

In the following question, a sentence has been given in Active/Passive voice. Out of four alternatives suggested, select the one which best expresses the same sentence in Passive/Active voice.
I will write an essay.

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 appropriateoption. If a sentence is free from error, select 'No error'.

These kind of clothes (1)/ are rather expensive (2)/ for me to buy. (3)/ No Error (4)

In a water molecule, the ratio of mass of Hydrogen to the mass of Oxygen is always:

Which of the following rivers flows from south to north?

Contraction of heart is also known as

Which of the following gulf countries has announced to form new economic and partnership group named 'Joint Cooperation Committee' inDecember 2017?

Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.

The first working steam­ powered vehicle was designed and most likely built by Ferdinand Verbies, a Flemish member of a Jesuit mission in China around 1672. It was a 65 cm long scale­ model toy for the Chinese Emperor, that was unable to carry a driver or a passenger. It is not known if Verbiest's model was ever built. Nicolas- Joseph Cugnot is widely credited with building the first full­ scale, self ­propelled mechanical vehicle or automobile in about 1769; he also created a steam­ powered tricycle. He constructed two steam tractors for the French Army, one of which is preserved in the French National Conservatory of Arts and Crafts. His inventions were however handicapped by problems of water supply and maintaining steam pressure. In 1801, Richard Trevithick built and demonstrated his Puffing Devil road locomotive, believed by many to be the first demonstration of a steam ­powered road vehicle. It was unable to maintain sufficient steam pressure for long periods. Sentiment against steam ­powered road vehicles led to the Locomotive Acts of 1865. In 1807 Nicephore Niepce and his brother Claude probably created the world's first internal combustion engine which they called Pyreolophore.

The problem with Trevithick's Puffing Devil was: