In a class test, a certain number of students got different ranks based on their marks. Vivek is ranked 12th from the top and 15th from the bottom. How many total students gave the test?
To find the total number of students, we can use the formula that relates a person's rank from both ends of a sequence. If a person's rank from the top is given and their rank from the bottom is also given, the total number of people in the sequence can be calculated by adding these two ranks and subtracting 1 (because the person themselves is counted twice).
B) 26 — By adding Vivek's rank from the top (12) and his rank from the bottom (15) and then subtracting 1 (because Vivek himself is counted in both ranks), we get \(12 + 15 - 1 = 26\).
The problem is a coding-decoding question. We need to identify the pattern or rule used to transform the given words ('ANGRY' and 'THINK') into their respective codes ('CKIOA' and 'VEKKM'). Once the rule is found, apply it to the word 'CROWN' to find its code.
The pattern observed is +2, -3, +2, -3, +2 for consecutive letters.
The pattern is consistent: +2, -3, +2, -3, +2.
A) EOQTP is the correct code derived by applying the +2, -3, +2, -3, +2 pattern to 'CROWN'.
The question asks about Fleming's left-hand rule, which is used to determine the direction of force on a current-carrying conductor in a magnetic field. We need to recall what each finger (thumb, index, and middle) represents in this rule.
C) current, magnetic field — The middle finger (centre finger) represents the direction of the current, and the index finger represents the direction of the magnetic field, according to Fleming's left-hand rule.
The question asks about the necessity of classification of elements. We need to evaluate each statement (A, B, C) to determine if it correctly describes a reason for classifying elements.
C) Only A and B
Statements A and B correctly describe the reasons and benefits of classifying elements. Statement C describes the opposite of what classification aims to achieve.
The question asks to identify the process that does NOT occur during photosynthesis. Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll. This process converts light energy into chemical energy, which is stored in glucose. We need to evaluate each option against the known steps of photosynthesis.
During the light-dependent reactions of photosynthesis, water molecules are split (photolysis) to release electrons, protons, and oxygen. This process is essential for providing electrons to the electron transport chain and producing oxygen as a byproduct. So, this process does occur.
Photosynthesis is fundamentally a light-driven process. Chlorophyll and other pigments absorb light energy, which is then converted into chemical energy. This is the initial step of the light-dependent reactions. So, this process does occur.
During the light-independent reactions (Calvin cycle), carbon dioxide is taken up from the atmosphere and reduced to form glucose. This involves the addition of electrons and protons, using the ATP and NADPH produced during the light reactions. So, this process does occur.
Photosynthesis produces oxygen as a byproduct, which is then released into the atmosphere. Plants (and other photosynthetic organisms) absorb carbon dioxide for photosynthesis, not oxygen. Oxygen is primarily absorbed during respiration, which is a different metabolic process. Therefore, absorption of oxygen does NOT occur during photosynthesis.
Absorption of oxygen does not occur during photosynthesis. Instead, oxygen is released as a byproduct of the splitting of water molecules.
The question asks about the number of incisors in an adult human being. To answer this, one needs to recall the dental formula for adult humans and identify the number of incisor teeth.
B) eight — An adult human has 8 incisors in total: 4 in the upper jaw (2 central, 2 lateral) and 4 in the lower jaw (2 central, 2 lateral).
This is a logical reasoning problem involving arrangement on different floors. We need to deduce the exact floor on which each person lives by systematically using the given clues. We will create a table representing the floors and fill in the residents step-by-step.
Understand the setup: There are 6 floors, numbered 1 to 6 from bottom to top.
| Floor | Person |
|---|---|
| 6 | |
| 5 | |
| 4 | |
| 3 | |
| 2 | |
| 1 |
Clue 1: H lives on an odd numbered floor but not on floor number 3.
Possible floors for H: 1 or 5.
Clue 2: Only two people live between H and N.
| Floor | Person |
|---|---|
| 6 | |
| 5 | |
| 4 | N |
| 3 | |
| 2 | |
| 1 | H |
| Floor | Person |
|---|---|
| 6 | |
| 5 | H |
| 4 | |
| 3 | |
| 2 | N |
| 1 |
Clue 3: P lives on an odd numbered floor above N.
| Floor | Person |
|---|---|
| 6 | |
| 5 | P |
| 4 | N |
| 3 | |
| 2 | |
| 1 | H |
| Floor | Person |
|---|---|
| 6 | |
| 5 | H |
| 4 | |
| 3 | P |
| 2 | N |
| 1 |
Clue 4: Only two people live between P and T.
| Floor | Person |
|---|---|
| 6 | |
| 5 | P |
| 4 | N |
| 3 | |
| 2 | T |
| 1 | H |
| Floor | Person |
|---|---|
| 6 | T |
| 5 | H |
| 4 | |
| 3 | P |
| 2 | N |
| 1 |
Clue 5: Neither T nor W live on the topmost floor (Floor 6).
So, Case 1 is the correct arrangement:
| Floor | Person |
|---|---|
| 6 | |
| 5 | P |
| 4 | N |
| 3 | |
| 2 | T |
| 1 | H |
Final placement: The remaining people are W and Y. The remaining floors are 3 and 6. W cannot be on the topmost floor (Floor 6). So, W must be on Floor 3. Y must be on Floor 6.
| Floor | Person |
|---|---|
| 6 | Y |
| 5 | P |
| 4 | N |
| 3 | W |
| 2 | T |
| 1 | H |
Answer the question: How many people live below T?
T lives on Floor 2. The person living below T is H (on Floor 1). So, only one person lives below T.
D) One
Which gas is produced during electrolysis of brine, that burns with a pop sound?
The question asks to identify the gas produced during the electrolysis of brine that burns with a pop sound. This requires knowledge of the products of brine electrolysis and the characteristic tests for common gases.
Correct Option: B) H₂ — Hydrogen gas (\(\text{H}_2\)) is produced at the cathode during the electrolysis of brine. It is known to burn with a characteristic "pop" sound when ignited, which is a common test for its presence.
The question asks about the specific dates when the Ministry of Women and Child Development celebrated International Women's Day week in 2022 as an 'Iconic Week' under the 'Azadi Ka Amrit Mahotsav' initiative. This requires knowledge of specific government initiatives and their timelines.
Correct Option: A) 1 to 8 March
The problem presents a letter series with blanks. The goal is to identify the repeating pattern in the series and then fill in the blanks using the correct sequence of letters from the given options.
_ _ F G E _ _ G _ H F G E _ F G.F G E. This sequence appears multiple times: F G E _ _ G _ H F G E _ F G._ _ F GE _ _ G_ H F GE _ F G_ _ F GE _ _ G_ H F GE _ F GF G is consistent at the end of many blocks. Also, E appears at the beginning of Block 2 and Block 4. The sequence E H F G seems to be a strong candidate for the repeating block.E H F G:E H F G, the series becomes:E H F G (first block)E H F G (second block)E H F G (third block)E H F G (fourth block)_ _ F G E _ _ G _ H F G E _ F GE H F G:E H F G (first 4 letters)E H F G (next 4 letters)E H F G (next 4 letters)E H F G (last 4 letters)E H F G E H F G E H F G E H F G.E H H F E H.C) EHHFEH — This sequence correctly fills the blanks to complete the repeating pattern E H F G.
EGHFFF — If we substitute these letters, the pattern does not consistently repeat. For example, the second block would become E G H G, which breaks the E H F G pattern.EFHHFH — Substituting these letters would result in an inconsistent pattern. For instance, the first two blanks would be E F, making the first block E F F G, which doesn't match the established pattern.EHFGEH — While some letters might align, this sequence does not complete the series with a consistent repeating block. For example, the second blank would be H, and the third blank would be F, leading to E H F G for the first block, but the subsequent blanks would not maintain this pattern throughout.