To determine which metals are more reactive than hydrogen, we need to refer to the reactivity series of metals. The reactivity series lists metals in order of decreasing reactivity. Metals placed above hydrogen in this series are more reactive than hydrogen and can displace hydrogen from acids or water (under certain conditions), while those below hydrogen are less reactive and cannot.
Correct Option: C) Mg, Zn, Sn, Pb, Fe, Na
Refer to the given letter, number and symbol series and answer the question that follows.
(Left) * Y S 2 # C 2 4 & 7 F & 2 @ R 4 € G 4 £ 9 (Right)
How many such letters are there in the series each of which is immediately preceded by a symbol and also immediately followed by a number?
The problem asks us to identify the number of letters in a given series that are immediately preceded by a symbol and immediately followed by a number. We need to scan the series and look for the pattern: Symbol - Letter - Number.
C) 3 is the correct answer because there are three instances in the series where a letter is immediately preceded by a symbol and immediately followed by a number.
Professor Narayan Pradhan has been selected for the 31st GD Birla Award as of March 2022 for the Scientific Research for his major contribution in the field of ________.
mathematical modelling
material sciences
environmental biology
astrophysics
This question tests general knowledge about significant awards and the recipients' fields of work. To answer correctly, one needs to know about Professor Narayan Pradhan and his specific contributions that led to him receiving the G.D. Birla Award.
Correct Option: B) Professor Narayan Pradhan was awarded the 31st G.D. Birla Award for Scientific Research for his significant contributions in the field of material sciences, specifically for his work on semiconductor nanocrystals.
The question asks to identify the hormone whose deficiency leads to diabetes mellitus. This requires knowledge of the endocrine system and the specific functions of various hormones.
Correct Option: A) Insulin is the hormone whose deficiency is directly responsible for diabetes mellitus. Without sufficient insulin, glucose cannot enter cells effectively, leading to elevated blood sugar levels.
The question asks to identify the first World Bank-supported program for minority welfare implemented by the Ministry of Minority Affairs, Government of India. This requires knowledge of specific government schemes and their funding sources.
The "Nai Manzil" scheme is a skill development and training program for minority youth, launched in 2015. It is indeed supported by the World Bank and implemented by the Ministry of Minority Affairs. This makes it a strong candidate.
Upon reviewing the other options, it becomes clear that while they are also schemes by the Ministry of Minority Affairs, "Nai Manzil" is specifically recognized as the first World Bank-supported program for minority welfare.
A) Nai Manzil. This scheme was launched in 2015 by the Ministry of Minority Affairs. It aims to provide education and skill training to minority youth who are school dropouts or educated in community education institutions like Madrasas, to enable them to seek better employment in the organized sector. It is the first World Bank-supported program for minority welfare in India.
The question asks for the incorporation year of Bharat Heavy Electricals Limited (BHEL). This is a factual question requiring knowledge of the history of Public Sector Undertakings (PSUs) in India.
Correct Option: C) 1964
A decision is given followed by two statements I and II. Read all the information carefully and select the correct option.
Decision:
In many cities of Country S, only hybrid cars are allowed in the centre of the city in order to control pollution. Following the same, Country M has also decided to implement this in some tier-I cities.
Statements:
I. Unlike Country S, public transport is not well connected in most of the tier-I cities in Country M.
II. As per recent reports, the biggest contributor to pollution in Country M are transport trucks and two-wheelers.
Statement I weakens the decision and statement II is a neutral statement
Statement I is a neutral statement and statement II strengthens the decision
Both statements I and II strengthen the decision
Both statements I and II weaken the decision
The problem asks us to evaluate the impact of two statements on a decision made by Country M. The decision is to allow only hybrid cars in the center of some tier-I cities to control pollution, similar to Country S. We need to determine if each statement strengthens, weakens, or is neutral to this decision.
D) Both statements I and II weaken the decision
The principal focus of a spherical mirror (convex or concave) is directly related to its radius of curvature. The relationship between the focal length and the radius of curvature is a fundamental concept in optics.
Correct Option: C) 5.0 cm — The focal length of a spherical mirror is half its radius of curvature. Given the radius of curvature \(R = 10.0 \text{ cm}\), the focal length \(f = R/2 = 10.0 \text{ cm} / 2 = 5.0 \text{ cm}\).
The question asks for the primary reason why birds migrate long distances. Migratory behavior in animals, especially birds, is often linked to critical life cycle events and environmental conditions.
Correct Option: D) They fly to lay eggs.
Migrating to suitable breeding grounds where food is plentiful and conditions are favorable for nesting and raising young is one of the most crucial reasons for long-distance bird migration. This ensures the continuation of their species.
The question asks to identify the true properties of a square from the given statements. We need to evaluate each statement based on the definition and characteristics of a square.
B) a, c, d