Science and Environment Quiz: Day 77

January 30, 2023

A form of non-metal which has high ductility is

(A) Nitrogen
(B) Oxygen
(C) Chlorine
(D) Carbon

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Answer : D

Consider the following statement :
1. The mass of the matter remains same during Expansion
2, Compounds and elements are pure substance.
3. Argon is mono atomic gas.
Which of the statement is/are correct:

(A) Only 1 and 3
(B) Only 2 and 3
(C) Only 1 and 2
(D) All of these

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Answer : D

Consider the following statement :
1 Adsorption is the process in which the particles of a substance is concentrated only at the surface of another substance.
2. Absorption is the process in which the substance is uniformly distributed throughout the bulk of another substance.
Which of the statement is/are correct:

(A) Only 1
(B) Only 2
(C) Both 1 and 2
(D) Neither 1 nor 2

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Answer : C

The property which allows the metals to be hammered into their sheets is

(A) Ductility
(B) Malleability
(C) Conductivity
(D) Shining strength

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Answer : B

Consider the following statement :
1 Decomposition of lead nitrate is an example for a chemical reaction caused by light.
2. Formation of slaked lime from quicklime is an endothermic reaction.
3. Light energy may come out due to chemical reactions.
Which of the statement is/are correct:

(A) Only 1 and 3
(B) Only 2 and 3
(C) Only 1 and 2
(D) All of these

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Answer : B

Consider the following statement:
1 Aspirin is composed of 60% Carbon, 4.5% Hydrogen and 35.5% Oxygen by mass. Aspirin is a mixture.
2. Buttermilk is an example of heterogeneous Mixture
3. Liquid – liquid colloids are called gel.
Which of the statement is/are incorrect:

(A) Only 1 and 2
(B) Only 2 and 3
(C) Only 1 and 3
(D) All of the these

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Answer : B

Assertion: A drop of petrol when touched with finger gives a chill feeling.
Reason: The above phenomenon is an endothermic one.

(A) If both assertion and reason are true and reason is the correct explanation of assertion.
(B) If both assertion and reason are true but reason is not the correct explanation of assertion.
(C) If assertion is true but reason is false.
(D) If assertion is false but reason is true.

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Answer : A

Assertion: The formation of iron oxide from iron is a chemical change.
Reason: For the rust to form from iron, it must be exposed to air and water.

(A) If both assertion and reason are true and reason is the correct explanation of assertion.
(B) If both assertion and reason are true but reason is not the correct explanation of assertion.
(C) If assertion is true but reason is false.
(D) If assertion is false but reason is true.

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Answer : A

The pigment responsible for browning of apples is __________.

(A) Hydrated iron (II) oxide
(B) Melanin
(C) Starch
(D) Ozone

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Answer : b

In Haber’s process of producing ammonia is used as a catalyst.

(A) Nitrogen
(B) Hydrogen
(C) Iron
(D) Nickel

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Answer : C

Consider the following statements about the abiotic components of the environment
1. One single abiotic factor cannot limit the range of an organism.
2. Energy, rainfall, temperature, atmosphere, and Substratum land are all abiotic components of the Environment.
Which of the above statement(s) is/are correct?

(A) 1 only
(B) 2 only
(C) Both 1 and 2
(D) Neither 1 and 2.

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Answer : b

Consider the following statements
1. Xerarch succession takes place in dry areas and the series progress from dry to medium water conditions.
2. The pioneer species form the starting point of an ecological succession while the climax species form the end.
Which of the given statement(s) is/are correct?

(A) 1 only
(B) 2 only
(C) Both 1 and 2
(D) Neither 1 nor 2

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Answer: C

Consider the following statements related to the processes occurs in ecosystem
1. Humification occur during decomposition in the soil which leads to accumulation of a dark-coloured amorphous substance.
2. Decomposition is largely an oxygen requiring process.
3. Mineralization is the process by which substance become more concentrated in the bodies of consumers as one moves up the food chain.
Which of the above statements is/are correct?

(A) 1 and 2 only
(B) 2 and 3 only
(C) 1 only
(D) 1, 2 and 3

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Answer :A

In Environment, 'Carrying Capacity' is very often used. In this context, consider the following statements:
1. The population of any species will decrease below carrying capacity and will increase above carrying capacity.
2. Carrying capacity varies for different species and is affected by food availability, water supply and living space.
Which of the statement(s) given above is/are correct?

(A) 1 only
(B) 2 only
(C) Both 1 and 2
(D) Neither 1 nor 2

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Answer : b

Mammals from Colder climates generally have shorter ears and limbs to minimise heat loss Indicates

(A) Gause’s population exclusion principle
(B) Shelford’s law of tolerance
(C) Edge species
(D) Allen’s rule

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Answer : d