Questions

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

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: The depletion of organic nutrients in the soil has reached alarming proportions, thanks to indiscriminate use of chemical fertiliser in Green Revolution areas.
Q: As against an acceptable level of ‘soil organic carbon’ of well over 5 percent, soils in Punjab are said to have levels far below 1 percent.
R: Besides, 5.3 billion tonnes of soil is eroded annually, at a rate of 16.4 tonnes/hectare.
S: The nutrient imbalance has been skewed by the overuse of urea (N) vis-a-vis phosphatic (P in chemical parlance) and potassic (K) fertiliser.

Which of the following periodicals is not correctly matched with its editor?

Who is the author of the book “A Life Less Ordinary : A Memoir”?

In the following question, correct the equation by interchanging two signs.

9 x 3 + 8 ÷ 4 – 7 = 28

For what is Mohs scale used?

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?

The second most senior office in the country is of _____ .