Questions

The pH of a solution, whose hydrogen ion concentration is 1 x 10 mole per litre, will be ____.

Name the Russian chemist who stated that the properties of elements are a periodic function of their atomic masses?

If a person's income increases from Rs. 10 lakhs per year to Rs. 11 lakhs per year and tax increases from Rs. 80,000 to Rs. 92,500 the marginal tax rate is

Who is the author of ‘The Windfall’?

A high jumper runs for a while before taking a high jump so that the inertia of __ helps him take the long jump.

An echo is returned in 3 s. What is the distance of the reflecting surface from the source, considering the speed of sound as 342 ms-1?

In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement".

My father (were standing) in the balcony, his face clenched in a storm of emotions.

The question below consists of a set of labelled sentences. These sentences, when properly sequenced form a coherent paragraph. Select the most logical order of sentences from among the options.

P: Biographies of great men can also help us in learning good manners.
Q: Courtesy and politeness is the key to good manners.
R: No doubt these are little words but if they are spoken at the right moment and in a soft and sweet voice, they are bound to work wonders.
S: The use of polite words like "Sorry", "Please", "Thank you", "Beg your pardon", "Sir" etc. creates a healthy impact on the minds of others.