Question
Which is the lightest and most abundant chemical
element, constituting roughly 75 % of the Universe’s elemental mass?Solution
The lightest and most abundant chemical element in the Universe is hydrogen. It constitutes about 75% of the elemental mass in the Universe. Hydrogen is also the first element in the periodic table, with the atomic number 1. It is a highly reactive element, and it can form a wide variety of compounds with other elements.
A, B, C, D, E, F and G are sitting around a circular table facing the centre (but not necessarily in the same order).
G sits to the immediate lef...
A question is given, followed by two statements labelled I and II. Decide which of the statements is/are sufficient/necessary to answer the question and...
If ‘+’ means ‘−’, ‘−’ means ‘×’, ‘×’ means ‘÷’ and ‘÷’ means ‘+’, what will come in place of ‘?’ in the foll...
Study the given pattern carefully and select the number that can replace the question mark (?) in it.
First row: 19, 6, 37
Second row: 21,...
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance...
A group of friends met at a club 15 days ago and promised to meet again after 36 days. If today is Saturday, on which day will the friends meet again?
Three statements are followed by conclusions numbered I, II. You have to consider these statements to be true, even if they seem to be at variance with ...
18 Kishor starts from Point A and drives 36 km towards east. He then takes a right turn, drives 34 km, turns right and drives 39 km. He then takes a rig...
Select the correct combination of mathematical signs that can sequentially replace the * signs and balance the given equation.
42 * 27 * 3 * 84 * 2 * 3
A man starts from point A and walks 12km towards East. He turns right and walks 4km; turns right again and walks 8km. He then takes another right an 7km...
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