Correct Answer: d) Emulsion

Explanation:

Milk is an example of an emulsion, which is a type of colloid where tiny droplets of one liquid are dispersed in another liquid that is immiscible (does not mix). In the case of milk, it is an emulsion of fat droplets dispersed in water. The fat and water do not naturally mix, but milk contains emulsifying agents (like proteins) that stabilize the mixture.

Here’s why the other options are incorrect:

– a) Foam: A foam is a colloid where gas is dispersed in a liquid or solid (e.g., whipped cream or foam on beer). Milk is not a foam.

– b) Sol: A sol is a colloid where solid particles are dispersed in a liquid (e.g., paint or muddy water). Milk does not fit this description.

– c) Aerosol: An aerosol is a colloid where solid or liquid particles are dispersed in a gas (e.g., fog or smoke). Milk is not an aerosol.

Correct Answer: d) NaHCO3

Explanation:

Baking soda is chemically known as sodium bicarbonate, and its chemical formula is NaHCO3. It is a white crystalline compound that is commonly used in baking as a leavening agent. When it reacts with acids (like vinegar or lemon juice), it releases carbon dioxide gas, which helps dough rise.

– a) KHCO3: This is potassium bicarbonate, not baking soda.

– b) Na2CO3: This is sodium carbonate, also known as washing soda, which is different from baking soda.

– c) K2CO3: This is potassium carbonate, not related to baking soda.

– d) NaHCO3: This is the correct formula for baking soda.

Thus, the correct answer is d) NaHCO3.

Correct Answer: c) Cardiopulmonary Resuscitation

Explanation:

CPR stands for Cardiopulmonary Resuscitation. It is a life-saving technique used in emergencies when someone’s breathing or heartbeat has stopped, such as during a cardiac arrest or drowning. The term “cardiopulmonary” refers to the heart (“cardio”) and lungs (“pulmonary”), and “resuscitation” means reviving someone from unconsciousness or apparent death. CPR involves chest compressions and, in some cases, rescue breaths to help maintain blood flow and oxygenation to vital organs until professional medical help arrives.

Correct Answer:

b) 3 1 4 2

Explanation:

1. Spain – France: The Pyrenees mountain range forms a natural border between Spain and France. So, Spain-France corresponds to 3 (Pyrenees).

2. Switzerland: The Alps mountain range is prominently located in Switzerland. So, Switzerland corresponds to 1 (Alps).

3. Bulgaria: The Balkan mountain range is located in Bulgaria. So, Bulgaria corresponds to 4 (Balkan).

4. Italy: The Apennine mountain range runs through the length of Italy. So, Italy corresponds to 2 (Apennine).

Correct Answer: c) Terrestrial habitants

Explanation:

Plants and animals that live on land are referred to as terrestrial habitants. The term “terrestrial” is derived from the Latin word “terra,” meaning land. These organisms are adapted to survive in land-based environments, such as forests, grasslands, and deserts.

– a) Abiotic: This refers to non-living components of the environment, such as sunlight, water, and soil.

– b) Aquatic habitants: These are organisms that live in water-based environments like oceans, rivers, and lakes.

– d) Biotic: This term refers to all living organisms, including both terrestrial and aquatic life.

Thus, the correct answer is c) Terrestrial habitants.

Correct Answer: a) Pivotal joint

Explanation:

The joint where the neck joins the head is called a pivotal joint. This type of joint allows rotational movement, enabling the head to turn from side to side, as well as up and down. The pivotal joint is formed between the first two vertebrae of the spine: the atlas (C1) and the axis (C2).

– a) Pivotal joint: Correct, as it allows the head to rotate and move in different directions.

– b) Saddle joint: This type of joint allows movement in two directions, such as the thumb joint, but it is not found in the neck.

– c) Hinge joint: This joint allows movement in one direction, like the elbow or knee, but it does not apply to the neck.

– d) Ball and socket joint: This joint allows movement in all directions, such as the shoulder or hip, but it is not present in the neck.

Thus, the correct answer is a) Pivotal joint.

The correct answer is: b) Anasuya Sengupta

Explanation:

Anasuya Sengupta won the Best Actress award in the Un Certain Regard category at the 2024 Cannes Film Festival for her performance in the film The Shameless. This victory is historic as she is the first Indian actor to achieve this honor at Cannes.

Correct Answer: b) Neither 1 nor 2.

Explanation:

1. It is an air-to-air missile.

– This statement is incorrect. The RudraM-II is an air-to-surface anti-radiation missile, designed to target enemy radar and communication systems, rather than being an air-to-air missile.

2. It was tested in Rajasthan in May 2024.

– This statement is also incorrect. The RudraM-II missile was successfully flight-tested on May 29, 2024, but it was launched from a Su-30 MKI fighter aircraft off the coast of Odisha, not Rajasthan.

The correct answer is: b) Neither 1 nor 2.

Correct Answer: c) 3 2 1 4

Explanation:

1. A. Guðni Th. Jóhannesson:

Guðni Th. Jóhannesson is the President of Iceland. He has been serving as the President since 2016 and was re-elected in subsequent elections.

Match: A → 1 (Iceland)

2. B. Luong Cuong:

Lương Cường is a Vietnamese politician and former army general who is currently serving as the 14th president of Vietnam since October 2024.

Match: B → 2 (Vietnam)

3. C. Halla Tomasdottir:

Halla Tómasdóttir is an Icelandic former businesswoman and politician serving as the seventh president of Iceland since 2024.

Match: A → 1 (Iceland)

4. D. Jose Raul Mulino:

Jose Raul Mulino is a Panamanian politician and former Minister of Public Security. He is associated with Panama.

Match: D → 4 (Panama)

Correct Answer: b) Intertrappean beds – Fossils of sea plants and animals

Explanation:

The intertrappean beds primarily contain fossils of freshwater organisms, such as mollusks, rather than marine fossils. Therefore, this pairing does not accurately reflect the characteristics of these beds.