Select the option that will replace the question mark (?) in the following series.
The problem requires identifying the pattern in a series of diagrams and selecting the correct option that logically follows the sequence.
The correct arrangement matches option B, where the symbols have been rotated correctly according to the identified pattern.
Correct Option: B) The symbols are rotated clockwise by one quadrant.
If Rs 6,000 is invested at the rate of 20% per annum, compounded half-yearly, then the amount after 18 months will be:
The question asks to identify the active bleaching agent present in bleaching powder. Bleaching powder is a chemical compound known for its disinfecting and bleaching properties. Understanding its chemical composition is key to answering this question.
C) Chlorine is the active bleaching agent present in bleaching powder. Bleaching powder (\( \text{CaOCl}_2 \)) releases chlorine or hypochlorite ions, which are responsible for its bleaching action due to their strong oxidizing properties.
The question asks to identify the international hockey tournament where both Indian men's and women's teams secured the top position in 2017. This requires knowledge of major hockey tournament results for that specific year.
Correct Option: B) The Asia Cup
The question asks to identify the term for heat trapped inside the Earth's surface. This requires knowledge of different types of energy sources and their definitions.
Correct Option: C) Geo-thermal energy is derived from the heat stored beneath the Earth's surface. This heat is a result of the Earth's formation and ongoing radioactive decay of minerals.
To find the total height of the stack of books, we need to multiply the number of books by the thickness of each book. This is a straightforward multiplication problem.
Total height = Number of books \(\times\) Thickness of each book
\[ \text{Total height} = 47 \text{ books} \times 2 \text{ cm/book} \]\[ \text{Total height} = 94 \text{ cm} \]Correct Option: D) 94 cm
The speed of sound depends on the properties of the medium through which it travels. Specifically, it is influenced by the elasticity (or stiffness) and density of the medium. We need to compare these properties for solids, liquids, and gases to determine where sound travels fastest.
A) Solids — Sound travels fastest in solids because their particles are tightly packed and strongly bonded, allowing vibrations to be transmitted very efficiently and quickly. Solids have the highest elasticity (bulk modulus) compared to liquids and gases.
This question tests the understanding of the reactivity series of metals. A more reactive metal can displace a less reactive metal from its salt solution. We need to compare the reactivity of copper and zinc.
Correct Option: C) No reaction takes place
Find the odd one out.
| A | B | C | D |
| X22 | W23 | A1 | D4 |