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Science and Technology 2 2015-2016 SSC (Marathi Semi-English) 10th Standard [इयत्ता १० वी] Question Paper Solution

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Science and Technology 2
Marks: 40Academic Year: 2015-2016
Date: July 2016

Section B
[10]1
[5]1.A
[3]1.A.a
[1]1.A.a.i

Fill in the blanks and rewrite the completed statements:

___________ acid inhibits growth leading to wilting of leaves.

Concept: Reproduction in Plant - Modes of Reproduction Used by Multicellular Organisms - Vegetative Propagation
Chapter: [0.15] The Life Cycle
[1]1.A.a.ii

Fill in the blanks and rewrite the completed statements:

The organic compounds having double or triple bond in them are termed as _________________   _________________.

Concept: Carbon: a Versatile Element - Saturated and Unsaturated Carbon Compounds
Chapter: [12] Amazing World of Carbon Compounds
[1]1.A.a.iii

Fill in the blanks and rewrite the completed statements:

Lymph flows in _______________ direction. 

Concept: Sexual Reproduction in Flowering Plants
Chapter: [0.03] Life Processes in Living Organisms Part - 2 [0.15] The Life Cycle
[1]1.A.b

Write the structural formulae of the following compound ‘Ethane’.

Concept: Ethanol
Chapter: [12] Amazing World of Carbon Compounds
[1]1.A.c

Name the mode of reproduction process seen in yeast.

Concept: Reproduction in Plant - Modes of Reproduction Used by Single Organisms - Budding
Chapter: [0.15] The Life Cycle
[5]1.B
[1]1.B.a

Choose the correct alternative and rewrite the following:

Fermentation is a type of ____________________.

aerobic respiration

anaerobic respiration

exothermic reaction.

none of the above.

Concept: Reproduction in Plant - Modes of Reproduction Used by Multicellular Organisms - Fragmentation
Chapter: [0.15] The Life Cycle
[1]1.B.b

Choose the correct alternative and rewrite the following:

Some acetic acid is treated with solid NaHCO3, the resulting solution will be _________________.

Colourless

blue

green

yellow

Concept: Ethanoic Acid
Chapter: [12] Amazing World of Carbon Compounds
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[1]1.B.c

Choose the correct alternative and rewrite the following:

Ramesh observed a slide of Amoeba with elongated nuclei. It would represent _______________.

Binary fission

Budding

Multiple fission

None of the above.

Concept: Reproduction in Plant - Modes of Reproduction Used by Single Organisms - Fission
Chapter: [0.15] The Life Cycle
[1]1.B.d

Choose the correct alternative and rewrite the following:

Twenty dry raisins were soaked in 50 ml of water and kept for one hour at 500 C. Which out of the following is the correct observation? 

8 raisins absorbed water

18 raisins absorbed water

15 raisins absorbed water.

All raisins absorbed water.

Concept: Use of Efficient and Eco-friendly Technology
Chapter: [0.17] Striving for Better Environment 2
[1]1.B.e

Choose the correct alternative and rewrite the following:

Iron is _____________________.

More reactive than Zn.

more reactive than Al.

less reactive than Cu.

less reactive than Al.

Concept: Corrosion of Metals and Its Prevention
Chapter: [11] Understanding Metals and Non-Metals
[10]2 | Attempt any FIVE of the following:
[2]2.A

Gold and silver are used to make jewellery. Give reason

Concept: Types of Elements: Non-metal
Chapter: [11] Understanding Metals and Non-Metals [11] Understanding Metals and Non-Metals [11] Understanding Metals and Non-Metals
[2]2.B

Explain the following reaction with balanced chemical equation:
Calcium reacts with water. 

Concept: Carbon: a Versatile Element - Saturated and Unsaturated Carbon Compounds
Chapter: [12] Amazing World of Carbon Compounds
[2]2.C

Write any two physical properties of Ethanol.

Concept: Ethanol
Chapter: [12] Amazing World of Carbon Compounds
[2]2.D

Give scientific reason : Roots of plants grow away from light

Concept: Coordination in Plants - Introduction
Chapter: [0.14] The Regulators of Life
[2]2.E

In which livings, female decides the sex? Give two examples.

Concept: Sex Determination in Humans
Chapter: [0.16] Mapping Our Genes
[2]2.F

Give the molecular and structural formulae of Benzene.

Concept: Formation and Properties of Ionic Compounds
Chapter: [11] Understanding Metals and Non-Metals
[15]3 | Attempt any FIVE of the following :
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[3]3.A

What do you mean by vestigial structures? Name four vestigial organs found in man.

Concept: Evidence of Evolution
Chapter: [0.01] Heredity and Evolution [0.16] Mapping Our Genes
[3]3.B

State Darwin’s theory of evolution.

Concept: Darwin'S Theory of Natural Selection
Chapter: [0.01] Heredity and Evolution [0.16] Mapping Our Genes
[3]3.C

Draw a diagram of longitudinal section of a flower and label the following parts.

Concept: Sexual Reproduction in Flowering Plants
Chapter: [0.03] Life Processes in Living Organisms Part - 2 [0.15] The Life Cycle
[3]3.D
[1]3.D.a

Explain the term Reproduction.

Concept: Reproduction in Plant
Chapter: [0.15] The Life Cycle
[1]3.D.b

Explain the term Vegetative propagation.

Concept: Reproduction in Plant - Modes of Reproduction Used by Multicellular Organisms - Vegetative Propagation
Chapter: [0.15] The Life Cycle
[1]3.D.c

Explain the term: Pollination. 

Concept: Reproduction in Plant
Chapter: [0.15] The Life Cycle
[3]3.E

Write the names and functions of three parts of human nervous system in which it is divided.

Concept: Human Nervous System
Chapter: [0.14] The Regulators of Life
[3]3.F
Geeta dipped a copper coin in a solution of silver nitrate. After some time she saw the silver shine on the coin. Why? Give the balanced chemical equation for the same and name the type of reaction.
Concept: Types of Elements: Non-metal
Chapter: [11] Understanding Metals and Non-Metals [11] Understanding Metals and Non-Metals [11] Understanding Metals and Non-Metals
[5]4 | Attempt any one of the following questions:
[5]4.A
What is recycling of waste?
Concept: Use of Efficient and Eco-friendly Technology
Chapter: [0.17] Striving for Better Environment 2

Give one example of Reuse.

Concept: Use of Efficient and Eco-friendly Technology
Chapter: [0.17] Striving for Better Environment 2

Write the advantages of recycling.

Concept: Use of Efficient and Eco-friendly Technology
Chapter: [0.17] Striving for Better Environment 2
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[5]4.B

List the organs of Human respiratory system. 

Concept: Concept of Respiration
Chapter: [0.13] Life's Internal Secrets

Explain the ‘inhalation’.

Concept: Concept of Life Processes
Chapter: [0.13] Life's Internal Secrets

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