The question asks to identify the symbolic representation of a combination reaction. A combination reaction is a type of chemical reaction where two or more reactants combine to form a single product. We will analyze each option based on this definition.
B) \(A + B \rightarrow C\) represents a combination reaction because two reactants (A and B) combine to form a single product (C).
The question gives two coding examples: 'LEFT' is written as 'VGFN' and 'DESK' is written as 'MTFF'. We need to find the rule that changes each word into its code and then apply the same rule to 'HELP'.
Identify the given information:
Find the pattern using LEFT:
Write LEFT in reverse order: T F E L.
Move the first and last letters two steps forward, and the middle two letters one step forward:
This gives VGFN.
Check the pattern with DESK:
Reverse order: K S E D.
K + 2 = M, S + 1 = T, E + 1 = F, D + 2 = F.
This gives MTFF. The rule holds.
Apply the rule to HELP:
Reverse order: P L E H.
P + 2 = R, L + 1 = M, E + 1 = F, H + 2 = J.
Therefore, HELP is written as RMFJ.
Correct Option: B) RMFJ — The word is reversed; the first and last letters then move two steps forward and the middle letters one step forward. HELP becomes PLEH and then RMFJ. Hence, Option B is the correct answer.
A) SMFJ: This is incorrect because P moves two steps forward to R, not three steps to S.
C) QMFJ: This is incorrect because P moves two steps forward to R, not one step to Q.
D) RNFJ: This is incorrect because L moves one step forward to M, not two steps to N.
The question gives a statement about Cyclone Sepa approaching the Balasore coast, along with two conclusions. We need to check whether each conclusion follows from the information in the statement.
Identify the given information:
Check Conclusion I:
Power supply is likely to be affected from 2 p.m. to 9 p.m.
The period after 3 p.m. falls within this window, so power cuts after 3 p.m. are possible.
Therefore, Conclusion I follows.
Check Conclusion II:
Rough seas, heavy rain and strong winds are expected from 11 a.m. onwards, with the cyclone making landfall by 3 p.m.
Under such conditions, going out to sea would be dangerous until the cyclone passes.
Therefore, Conclusion II follows.
Correct Option: B) Both conclusions I and II follow — Power supply is likely to be affected from 2 p.m. to 9 p.m., so power cuts after 3 p.m. are possible. Rough seas and strong winds make it unsafe for fishermen to go out to sea. Hence, Option B is the correct answer.
A) Only conclusion I follows: This is incorrect because Conclusion II also follows from the expected rough seas and strong winds.
C) Only conclusion II follows: This is incorrect because Conclusion I also follows from the expected disruption to the power supply.
D) Neither conclusion I nor II follows: This is incorrect because both conclusions follow from the statement.
Study the given letter, symbol series and answer the question that follows.
L @ S O J ^ B U # W R < E M @ N U # B * H ! A & L E W % H & G A * S A # L D
How many consonants are immediately preceded by a symbol and immediately followed by a vowel?
The problem asks us to identify the number of consonants that are immediately preceded by a symbol and immediately followed by a vowel in the given series. We need to scan the series from left to right and check each character against these two conditions.
The given series is: L @ S O J ^ B U # W R < E M @ N U # B * H ! A & L E W % H & G A * S A # L D
D) 6 - As identified in the step-by-step analysis, there are 6 instances where a consonant is immediately preceded by a symbol and immediately followed by a vowel.
This question tests knowledge of the focal lengths of common optical devices like lenses and mirrors. The sign convention for focal length is crucial here. A positive focal length indicates a converging optical device, while a negative focal length indicates a diverging optical device.
Correct Option: B) Either a convex lens or a convex mirror
The question asks to identify the Article of the Indian Constitution that guarantees the protection of life and personal liberty. This requires knowledge of fundamental rights enshrined in the Constitution.
Correct Option: D) Article 21
Article 21 of the Indian Constitution guarantees the protection of life and personal liberty. It is one of the most fundamental and widely interpreted articles, forming the bedrock of many other rights, including the right to live with human dignity, right to livelihood, right to privacy, etc.
The question asks about events occurring during diastole in the human heart. Diastole is the phase of the cardiac cycle when the heart muscle relaxes and chambers fill with blood. Understanding the sequence of blood flow through the heart during relaxation and contraction phases is key to answering this question.
C) Blood enters the ventricle — During diastole, the ventricles relax, and the atrioventricular valves open, allowing blood to flow from the atria into the ventricles. This is the filling phase of the ventricles.
To find the perimeter of a rectangular plot, we need both its length and width. We are given the diagonal and one side. We can use the Pythagorean theorem to find the other side, and then calculate the perimeter.
D) 158 m — The perimeter of the rectangular plot is calculated as \(2 \times (63 + 16) = 158 \text{ m}\).
The question asks to identify the common name for calcium sulphate dihydrate. This requires knowledge of common chemical compounds and their chemical formulas or names.
Correct Option: B) Gypsum is the common name for calcium sulphate dihydrate, which has the chemical formula \( \text{CaSO}_4 \cdot 2\text{H}_2\text{O} \). It is a soft sulfate mineral used in plaster, drywall, and fertilizer.
For point B to lie on the line segment AC, the sum of the lengths of AB and BC must be equal to the length of AC. This is a fundamental property of collinear points where one point lies between the other two. We will set up an equation based on this condition and solve for 'x'.
Understand the condition: If point B lies on the line segment AC, it means that A, B, and C are collinear, and B is between A and C. In this case, the distance from A to C is the sum of the distance from A to B and the distance from B to C.
\[ \text{AB} + \text{BC} = \text{AC} \]Substitute the given expressions: We are given the lengths in terms of 'x':
Substitute these into the equation from Step 1:
\[ (x + 3) + (2x) = 4x - 5 \]Simplify the equation: Combine like terms on the left side of the equation:
\[ 3x + 3 = 4x - 5 \]Solve for 'x': To isolate 'x', move all terms involving 'x' to one side and constant terms to the other side. Subtract \(3x\) from both sides:
\[ 3 = 4x - 3x - 5 \]\[ 3 = x - 5 \]Add 5 to both sides:
\[ 3 + 5 = x \]\[ x = 8 \]Verify the lengths: Substitute \(x = 8\) back into the original expressions to ensure all lengths are positive and the condition holds:
Check if \( \text{AB} + \text{BC} = \text{AC} \):
\[ 11 + 16 = 27 \]\[ 27 = 27 \]The condition is satisfied, and all lengths are positive. Therefore, \(x = 8\) is the correct value.
Correct Option: D) 8