Chemistry Class 10 Quiz

Instructions and Marks

• All questions are compulsory
• Draw diagrams where necessary
• Marks for each question are indicated
• 1-5 are objective type questions (30 marks total)
• 6-17 are 2 marks each (30 words max)
• 18-20 are 3 marks each (75 words max)
• 21-23 are 4 marks each (120 words max)
• Internal options available for questions 6-23

Objective Questions

• Questions 1-5 are objective type questions totaling 30 marks

Other Questions

• Questions 6-23 have internal options
• Word limits are provided for each

Multiple Choice Questions

• Question 1: Calcium oxide reacting with water is an exothermic reaction
• Question 2: Balanced equation for propane combustion: C3H8 + 5O2 → 3CO2 + 4H2O
• Question 3: Best material for electromagnet core is iron.

True/False Statements

• The organs involved in reflex action are spinal cord, motor neuron and brain (True)
• Acids have a pH value greater than 7 (False)
• In a chemical reaction, the mass of the products is always equal to the mass of the reactants. (True)
• Refraction occurs when light travels from one medium to another at the same speed. (False)
• All metals are ductile and can be drawn into wires. (True)
• The retina in the human eye contains rod and cone cells for vision. (True)

Matching

Short Answer Type Questions

• Two examples of metals with low melting point (not provided in text)
• Direction of magnetic field lines outside a bar magnet (not provided in text)
• Normal blood pressure of a human (not provided in text)
• Part of human brain specialized for thinking, hearing, smelling, seeing etc. (not provided in text)
• Lens for correcting myopia is a concave lens
• Formula for ethane is C2H6
• Draw electron dot structure of methane or ethane (drawings not possible in this format)

Component Symbols

• Symbols for battery and resistance in circuit diagrams (drawings not possible in this format)

Factors Affecting Resistance

• Factors affecting resistance (not provided in detail)

Why Stars Twinkle

• Explanation for why stars twinkle (not provided in detail)
• Reason why sky looks blue (not provided in detail)

Bryophyllum Reproduction

• How Bryophyllum leaves reproduce (not provided in detail)
• Process of binary fission in Amoeba (not provided in detail)
• Difference between endothermic and exothermic reactions (not provided in detail)

Oxidation/Reduction

• Definition of oxidation and reduction reaction (not provided in detail)

Significance of Mendel's Law

• Significance of Mendel's law of segregation (not provided in detail)
• Mendel's law of dominance with an example (not provided in detail)

Diagram of Human Excretory System

• Diagram of human excretory system (drawing not possible in this format)

Heart Valves

• Names and functions of two heart valves (not provided in detail)

Reflex Action

• Definition of reflex action with an example (not provided in detail)
• Role of neurons in the human body (not provided in detail)

Ohm's Law

• Statement of Ohm's law and mathematical expression (not provided in detail)
• Calculation of total resistance of three resistors in series (not provided in detail)

15. Refractive Index and Lens Power

• Definition of refractive index, refractive index of water (not provided in detail)
• Calculation of power of a lens with focal length (not provided in detail)
• Importance of pH in living organisms (not provided in detail)

Chemical Reaction of Baking Soda

• Chemical reaction of baking soda on heating and write the chemical reaction (not provided in detail)
• Ways to control water pollution (not provided in detail)
• Examples of causes of air pollution (not provided in detail)

Examples of Metals

• Examples of metals that do not corrode, have highest electrical conductivity and can be cut with knife (not provided in detail)

Definition of Terms (Corrosion, Ductility, Anodizing)

• Definitions of corrosion, ductility, and anodizing (not provided in detail)
• Characteristic features of magnetic field lines (drawing not possible in this format)

Current Carrying Conductor and Circular Loop

• Pattern of magnetic field lines around a straight current-carrying conductor and a circular loop (drawing not possible in this format)

IUPAC name and structure

• IUPAC name and structure for C4H9OH and other organic compounds (drawings not possible in this format)

Function of Saliva

• Drawing of the human digestive system and function of saliva (drawing not possible in this format)
• Drawing of the human heart and type of circulatory system (drawing not possible in this format)

Female Reproductive System

• Labeling of parts of female reproductive system and their significance (drawing not possible in this format)

Vegetative Propagation

• Methods of vegetative propagation and their significance in agriculture (not provided in detail)

Mirror Image Formation

• Formation of image by a concave mirror given object distance and focal length (drawing not possible in this format)
• Formation of image by a convex mirror given object distance and radius of curvature (drawing not possible in this format)

Test your knowledge of chemical reactions, including exothermic processes and combustion. This quiz features a variety of objective and subjective questions, challenging your understanding of key concepts in chemistry. Get ready to draw diagrams and answer questions with specified word limits!