How many squares are there in the given figure?
To determine the number of squares in the given figure, we need to count all possible squares, including smaller squares within larger ones.
Correct Option: A) 21
The question asks to identify the first police force in India to digitise all its malkhanas (rooms for keeping seized arms and ammunition). This is a factual question related to current affairs and technological advancements in law enforcement.
Correct Option: A) Delhi Police became the first police force in the country to digitise all malkhanas, rooms for keeping seized arms and ammunition. This initiative was part of their broader modernization efforts to improve the management of case properties.
The question asks to identify India's first self-made fighter jet. This requires knowledge of Indian defense aviation history and the origin of various fighter aircraft in service with the Indian Air Force (IAF).
Correct Option: A) LCA Tejas
The question asks to identify the constituent elements of the alloy Bronze. This requires knowledge of common alloys and their compositions.
B) Copper and tin — Bronze is traditionally an alloy primarily composed of copper, usually with tin as the main additive. Other modern additives can include zinc, manganese, and aluminum, but the classic definition refers to copper and tin.
The question asks about the primary function of a lubricant. Lubricants are substances used to reduce friction between surfaces in contact. Understanding the fundamental cause of friction will help identify what a lubricant reduces.
D) The interlocking of the irregularities of the surfaces — Lubricants work by forming a layer between surfaces, preventing their microscopic irregularities from interlocking directly. This is the fundamental mechanism by which they reduce friction.
The question asks for the term used to describe the lowest portion of a sound wave. This requires knowledge of basic wave terminology, specifically for transverse waves which are often used to represent sound waves graphically.
Correct Option: D) Trough
The question asks to identify the property that does NOT increase when moving down a group in the periodic table. We need to analyze the trend of each given property as we descend a group.
Correct Option: D) Valency does not increase while moving down the group of the periodic table; it remains constant.
The question asks for the appropriate unit to measure extremely large distances between celestial bodies. We need to evaluate each option based on its typical usage and scale.
Correct Option: D) Light years
Light-years are specifically designed to measure the vast distances between celestial bodies, making calculations and comprehension much simpler than using standard terrestrial units.
Dispersion of white light through a prism is a phenomenon where white light splits into its constituent colors. This occurs due to the variation in the refractive index of the prism material for different wavelengths (colors) of light. We need to identify the fundamental reason behind this variation in refractive index and its effect on the light's path.
Correct Option: A) 7 colours of white light travel at different speeds through a glass prism. This is the fundamental reason for dispersion. Different speeds lead to different refractive indices for each color, causing them to bend at different angles.
This is a logical reasoning question where we need to evaluate the given conclusions based solely on the information provided in the statement. We must not use any outside knowledge or assumptions. The statement is a general observation, and the conclusions must logically follow from it.
C) Neither conclusion I nor II follows
Both conclusions make absolute claims that cannot be deduced from the general statement that money plays a vital role in our lives. The statement is about the importance of money, not about social mobility or political participation.