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Question Paper Solutions - Science and Technology - 2 2012 - 2013-S.S.C-10th Maharashtra State Board (MSBSHSE)


Marks: 30
[7]1
[2]1.1 | Fill in the blanks:
[1]1.1.1

Dominant character masks the ______________ characters.

Chapter: [1] Basic Biology
Concept: Genetics: Mendel’s Laws of Inheritance
[1]1.1.2

______________ artery takes the blood to the lungs for oxygenation.

Chapter: [2.01] Life Processes
Concept: Concept of Transportation
[3]1.2 | State whether the following statements are true or false:
[1]1.2.1

Roots of plants grow towards light

Chapter: [4] The Regulators of Life
Concept: Coordination in Plants - Introduction
[1]1.2.2

Hormones secreted by endocrine glands are directly released into blood stream.

Chapter: [4] The Regulators of Life
Concept: Chemical Control
[1]1.2.3

If X chromosome is inherited from mother and Y from father, the offspring will be male.

Chapter: [2.01] Principles of Inheritance and Variation
Concept: Sex Determination - Sex Determination in Humans
[1]1.3

Write structural formula of Methane.

Chapter: [1.04] Carbon Compounds
Concept: Bonding in Carbon - Covalent Bond
[1]1.4

Name the following:
Metals which forms an amphoteric oxide.

Chapter: [1.03] Metals and Non Metals
Concept: Chemical Properties of Metals - When Metals React with Oxygen
[6]2 | Answer the following sub-questions:
[2]2.1

‘A’ is an element having four electrons in its outermost orbit. An allotropes ‘B’ of this element is used as a dry lubricant in machinery and in pencil leads. So:
i. Write the name of element ‘A’ and its allotropes.
ii. State whether ‘B’ is a good conductor or non-conductor of electricity?

Chapter: [1.04] Carbon Compounds
Concept: Versatile Nature of Carbon - Saturated and Unsaturated Carbon Compounds
[2]2.2

‘E’ is an element which reacts with oxygen to form an oxide E2O. An aqueous solution of E2O turns red litmus blue, so:
i. What is the nature of oxide E2O ?
ii. Write the name of element ‘E’.

Chapter: [1.03] Metals and Non Metals
Concept: Chemical Properties of Metals - When Metals React with Oxygen
[2]2.3

Write two points of differences between arteries and veins.

Chapter: [2.01] Life Processes
Concept: Concept of Transportation
[12]3 | Answer the following questions (any four) :
[3]3.1

Write any three differences between metals and non-metals with respect to their physical properties.

Chapter: [1] Understanding Metals and Non-Metals
Concept: Metals and Nonmetals - Physical Properties - Non Metal
[3]3.2

Define Saturated hydrocarbon.

Chapter: [1.04] Carbon Compounds
Concept: Versatile Nature of Carbon - Saturated and Unsaturated Carbon Compounds

Define Unsaturated hydrocarbon.

Chapter: [1.04] Carbon Compounds
Concept: Versatile Nature of Carbon - Saturated and Unsaturated Carbon Compounds

Define Catenation.

Chapter: [1.04] Carbon Compounds
Concept: Versatile Nature of Carbon - Saturated and Unsaturated Carbon Compounds
[3]3.3

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

Chapter: [4] The Regulators of Life
Concept: Human Nervous System
[3]3.4

What is meant by sexual reproduction?

Chapter: [5] The Life Cycle
Concept: Sexual Reproduction

Name two main processes of sexual reproduction

Chapter: [5] The Life Cycle
Concept: Sexual Reproduction
[3]3.5

Name any three parts of the female reproductive system in human beings. Write one function of each.

Chapter: [5] The Life Cycle
Concept: Reproduction in Human Beings
[5]4 | Write the answer of any one question given below:
[5]4.1

Write names of different parts of human digestive system and explain functions of any three parts.

Chapter: [2.01] Life Processes
Concept: Nutrition - Nutrition in Human Beings
[5]4.2 | Answer the following:

What is the peculiarity of the ‘DNA’ structure?

Chapter: [1] Basic Biology
Concept: Genetics: Mendel’s Laws of Inheritance

Draw a diagram of DNA showing genes.

Chapter: [2.03] Reproduction
Concept: Reproduction - Introduction
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