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Science and Technology - 2 2014-2015 SSC (Marathi Semi-English) 10th Question Paper Solution

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Science and Technology - 2
Marks: 40Date: 2014-2015 March

[10]1
[5]1.1
[2]1.1.1 | Find the correlation in the given pair and rewrite the answer :

Tinning : Tin : : Galvanizing : _________

Concept: Corrosion and Its Prevention
Chapter: [11] Understanding Metals and Non-Metals

Mammals : _________ : : Amphibia : Fishes

Concept: Evidence of Evolution
Chapter: [1] Heredity and Evolution [16] Mapping Our Genes
[3]1.1.2 | State True or False :

Solar water – heater works on renewable energy system

Concept: Use of Efficient and Eco-friendly Technology
Chapter: [17] Striving for Better Environment 2

In human beings the blood goes to the heart in one cycle once.

Concept: Concept of Transportation
Chapter: [13] Life's Internal Secrets

In frogs, thyroid secretion stimulates the metamorphosis from tadpole to adult frog.

Concept: Chemical Control
Chapter: [14] The Regulators of Life
[5]1.2 | Rewrite the following statements by selecting the correct options :
[1]1.2.1

The molecular formula of acetic acid is _________ .
(a) CH3COOH
(b) CH3 – CH3
(c) C6H6
(d) C2H4

Concept: Important Carbon Compounds - Ethanoic Acid (Acetic acid)
Chapter: [12] Amazing World of Carbon Compounds
[1]1.2.2

Carbon dioxide enters into the leaves through tiny pores present on the surface of the leaf called _________.
(a) chlorophyll
(b) chloroplast
(c) stomata
(d) epidermis

Concept: Concept of Respiration
Chapter: [13] Life's Internal Secrets
[1]1.2.3

_________ solution is blue in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3

Concept: Metals and Nonmetals - Chemical Properties of Metals - Metals React with Solutions of Other Metal Salts
Chapter: [11] Understanding Metals and Non-Metals
[1]1.2.4

Yeast reproduces by _________.
(a) spore formation
(b) multiple fission
(c) fragmentation
(d) budding

Concept: Reproduction - Modes of Reproduction Used by Single Organisms - Budding
Chapter: [15] The Life Cycle
[1]1.2.5

Raisins put in water absorb water by the process of _________.
(a) diffusion
(b) osmosis
(c) transpiration
(d) excretion

Concept: Concept of Transportation
Chapter: [13] Life's Internal Secrets
[10]2 | Solve any five of the following :
[2]2.1

Give scientific reason: Common salt has high melting point and boiling point.

Concept: Formation and Properties of Ionic Compounds
Chapter: [11] Understanding Metals and Non-Metals
[2]2.2

Draw neat labelled diagram of the pancreas with their associated structures

Concept: Nutrition - Nutrition in Human Beings
Chapter: [13] Life's Internal Secrets
[2]2.3

State the connecting links between Peripatus with Annelida and Arthopoda.

Concept: Evidence of Evolution
Chapter: [1] Heredity and Evolution [16] Mapping Our Genes
[2]2.4

Name any two plant hormones and state their functions.

Concept: Coordination in Plants - Movement Due to Growth
Chapter: [14] The Regulators of Life
[2]2.5

Differentiate between Toilet soap and Laundry soap.

Concept: Soaps and Detergents
Chapter: [12] Amazing World of Carbon Compounds
[2]2.6

State any four objectives of sustainable development.

Concept: Sustainable Use of Resources
Chapter: [17] Striving for Better Environment 2
[15]3 | Answer any five of the following :
[3]3.1

What is an alloy?

Concept: Corrosion and Its Prevention
Chapter: [11] Understanding Metals and Non-Metals

Give two examples of alloys with their chemical composition.

Concept: Corrosion and Its Prevention
Chapter: [11] Understanding Metals and Non-Metals
[3]3.2

Name the following: Cells that assist the neuron in their function

Concept: The Central Nervous System
Chapter: [14] The Regulators of Life

Name the following: The small gap between the consecutive neurons

Concept: The Central Nervous System
Chapter: [14] The Regulators of Life

Name the following: Part of the brain that coordinates the voluntary functions

Concept: The Central Nervous System
Chapter: [14] The Regulators of Life
[3]3.3

Explain the process of fertilization in human beings.

Concept: Reproduction in Human Beings
Chapter: [15] The Life Cycle

Explain the process of development in human beings.

Concept: Reproduction in Human Beings
Chapter: [15] The Life Cycle

Explain the process of birth in human beings.

Concept: Reproduction in Human Beings
Chapter: [15] The Life Cycle
[3]3.4

What are vestigial organs?

Concept: Evidence of Evolution
Chapter: [1] Heredity and Evolution [16] Mapping Our Genes

Give two examples of vestigial organs  in human beings and plants.

Concept: Evidence of Evolution
Chapter: [1] Heredity and Evolution [16] Mapping Our Genes
[3]3.5

What is recycling of waste?

Concept: Sustainable Use of Resources
Chapter: [17] Striving for Better Environment 2

Examples of recycling of waste.

Concept: Sustainable Use of Resources
Chapter: [17] Striving for Better Environment 2

State two advantages of recycling.

Concept: Sustainable Use of Resources
Chapter: [17] Striving for Better Environment 2
[3]3.6

Which mode of reproduction gives rise to variation?

Concept: Sexual Reproduction
Chapter: [3] Life Processes in Living Organisms Part - 2 [15] The Life Cycle

Give the importance of variation in survival of species.

Concept: Sexual Reproduction
Chapter: [3] Life Processes in Living Organisms Part - 2 [15] The Life Cycle
[5]4 | Answer any one of the following :
[5]4.1

Given below are the end products of different reactions involving glucose. Write the appropriate end product in front of the following:

(1) Anaerobic reaction =
(2) Reaction in human muscles =
(3) Aerobic respiration
(4) Reaction in plant cells =
(5) Reaction in liver =

Concept: Concept of Life Processes
Chapter: [13] Life's Internal Secrets
[5]4.2 | Answer the following questions:
[1]4.2.1

Give other two names of ethanol.

Concept: Important Carbon Compounds - Ethanol
Chapter: [12] Amazing World of Carbon Compounds
[1]4.2.2

Give the structural formula of ethanol.

Concept: Important Carbon Compounds - Ethanol
Chapter: [12] Amazing World of Carbon Compounds
[1]4.2.3

Give two properties of ethanol.

Concept: Important Carbon Compounds - Ethanol
Chapter: [12] Amazing World of Carbon Compounds
[2]4.2.4

Explain the action of phosphorous trichloride with ethanol. Write the balanced chemical equation of the above reaction.

Concept: Important Carbon Compounds - Ethanol
Chapter: [12] Amazing World of Carbon Compounds

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