The question asks to identify which metals are stored in kerosene. This relates to the chemical reactivity of metals, particularly alkali metals, which are highly reactive with air and water.
Correct Option: A) Potassium (K) and Sodium (Na) are highly reactive alkali metals that readily react with oxygen and moisture in the air. To prevent these vigorous reactions, they are stored immersed in kerosene, which is an inert medium that keeps them isolated from air and water.
We need to determine if the given statements provide enough information to identify the oldest person among T, V, and W. We will analyze each statement individually and then combine them if necessary.
A) Statements 1 and 2 are sufficient. Both statements together provide enough information to establish the age order as T > W > V, thus identifying T as the oldest.
Which of the following is not a characteristic of a sound wave?
The question asks to identify which option is NOT a characteristic of a sound wave. We need to recall the fundamental properties that describe a wave, specifically a sound wave, and then evaluate each given option.
C) Density is not a characteristic of a sound wave. It is a characteristic of the medium through which the sound wave travels.
The question asks us to identify the 'odd one out' based on electrical conductivity among the given options. We need to classify each option as either a good conductor or a poor conductor (insulator) of electricity.
Correct Option: A) Rubber is an electrical insulator, meaning it does not conduct electricity well. The other options (Copper, Human Body, Graphite) are all conductors of electricity.
This question tests the understanding of fundamental concepts in physics, specifically related to Newton's laws of motion. The phenomenon described, where leaves detach when a branch is moved quickly, is a classic example illustrating one of these principles.
Correct Option: D) Inertia. Inertia is the property of an object to resist changes in its state of motion. When the branch is moved quickly, the leaves, due to their inertia, tend to remain in their original state of rest. This resistance causes them to detach if the force holding them is insufficient.
The problem is a coding-decoding question where letters are represented by numbers. We need to identify the pattern used to convert "NYLON" into "1425121514" and then apply the same pattern to "COTTON".
Correct Option: C) 31520201514 is the correct code for COTTON, following the established pattern.
The question asks to identify the quantity that specifies speed along with direction. This requires understanding the definitions of scalar and vector quantities, particularly in the context of motion.
C) Velocity is a vector quantity that describes the rate of change of an object's position. It is defined as displacement divided by time. Mathematically, it is expressed as:
\[ \vec{v} = \frac{\Delta \vec{x}}{\Delta t} \]Here, \(\vec{v}\) is velocity, \(\Delta \vec{x}\) is displacement (a vector), and \(\Delta t\) is time. The magnitude of velocity is speed, and its direction is the same as the direction of displacement. Thus, velocity inherently specifies speed along with its direction.
The question asks for the location of the headquarters of the 'Sahitya Akademi'. This is a factual question about a prominent cultural institution in India. Knowledge of major Indian cultural bodies and their headquarters is important for competitive exams.
Correct Option: D) New Delhi is the correct answer because the Sahitya Akademi, India's National Academy of Letters, has its headquarters located there.
This question asks us to evaluate the strength of two arguments in response to a statement. We need to determine which argument provides a more compelling and valid reason related to the statement's core issue.
Correct Option: B) Only II is strong.
Three of the figures given below are similar in a certain way. However, one of these figures is not the same as the other three. Select the figure which is different from others.
The task is to identify which figure among the given options is different from the others based on their shapes and characteristics.
Correct Option: D) Figure D is different because it consists of two separate elements, unlike the other figures which are single, continuous shapes.