CBSE Class 10 - Science - CH2 - Acids, Bases and Salts (Worksheet)

Acids, Bases and Salts

credits:clker.com

Worksheet

Fill in the Blanks

1. Blue litmus changes into red colour in the presence of_______.

2. The acid present in lemon juice is _______.

3. Red litmus changes into blue colour in the presence of ______.

4. The chemical name of Plaster of Paris is ___________ and its chemical formula is ____________.

5. Methyl orange gives __________ in basic medium while phenolphthalein gives _______.

6. Example for strong acid is ________.

7. Example for weak acid is ________

8. Example for strong base is_______.

9. Example for weak base is ____________

CBSE Class 6-12 - Science - Fathers in Biology

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Fathers of Various Branches in Biology

Aristotle - Father of Biology
credits: wikipedia

Num.	Branch of Biology	Name
1	Father of Biology	Aristotle
2	Father of Zoology	Aristotle
3	Father of Botany	Theophrastus
4	Father of Taxonomy	Carl Linnaeus
5	Father of Plant Physiology	Stephen Hales
6	Father of Bacteriology	Louis Pastuer
7	Father of Microbiology	Leeuwenhoek
8	Father of Immunology	Edward Jenner
9	Father of Cytology	Robert Hooke
10	Father of Mycology	Micheli
11	Father of Genetics	G J Mendel
12	Father of Experimental Genetics	T. H. Morgan
13	Father of Bryology	Johann Hedwig
14	Father of Eugenics	Francis Galton
15	Father of Microscopy	Marcello Malphigi
16	Father of Bio-diversity	E.O. Wilson
17	Father of Medicine	Hippocrates
18	Father of modern Anatomy	Andreas Vesalius
19	Father of Radiation Genetics	H. J. Muller

CBSE Class 10 - Science - CH 8. CONTROL AND COORDINATION

CONTROL AND COORDINATION

MCQs

Q1: The plant hormone which is essential for cell division is:

(a) Auxin
(b) Cytokinin
(c) Ethylene
(d) Gibberellin


Q2: The gap between two neurons is called _____

(a) Synapse
(b) Axon
(c) Synthesise
(d) Dendron


Q3: A potted plant is kept in a room. It starts to bend towards the direction of light. This type of movement is known as

(a) Photographism
(b) Photoperiodism
(c) Phototropism
(d) Photocynism


Q4: Tropic movements are

(a) in response to light
(b) in response to gravity
(c) non-directional
(d) unidirectional

CBSE Class 10 - Science - CH2 - Acids, Bases and Salts (MCQs)

Acids, Bases and Salts

credits:clker.com

MCQs

Q1: The most commonly used indicator in laboratory is
(a) Methyl Orange
(b) Litmus
(c) Phenolphtalein
(d) Universal Indicator

Q2: Which gas is released when a metal reacts with an acid?

(a) Cl₂

(b) O₂
(c) H₂
(d) SO₂


Q3: The strength of acid depends upon

(a) density of the acid
(b) oxygen atoms present
(c) number of hydrogen atoms present in the molecule
(d) concentration of H+ ions furnished by the acid


Q4: Which statement is incorrect?

(a) Acids have pH more than 7
(b) Acids give H⁺ ions in water
(c) Acid conduct electricity in aqueous solution
(d) Acids turn blue litmus red.


Q5: Which of the following substance is antacid?

Class 10 - Science - CH13 - Magnetic Effects of Electric Current (MCQs)

Magnetic Effects of Electric Current

Magnetic field in wire loop
credits:openclipart

MCQs


Q1: Inside the magnet the field lines run

(a) From south to north
(b) Away from north pole
(c) From north to south
(d) Away from the south pole


Q2: An electric charge in uniform motion produces:

(a) an electric field only
(b) a magnetic field only
(c) both electric and magnetic fields
(d) no such field at all


Q3: The magnetic field inside the solenoid is

(a) Non uniform
(b)Variable
(c) same at all points
(d) zero

NTSE SAT (Science) Quiz-19 (Delhi Stage-1 2012)

NTSE SAT Quiz-19

MCQs from Delhi Stage-1 2012

Q1: Which of the following gases is known as tear gas?

(a) Methyl isocyanide
(b) Sulphur dioxide
(c) Chloropicrin
(d) Nitrous oxide


Q2: Mitosis

(a) leads to recombinant daughter cells
(b) is a reduction division
(c) occurs in gametes
(d) leads to formation of parental type of daughter cells


Q3: Neurons have a unique property that makes them to communicate with other cells via:

(a) Nerve cords
(b) Glial cells
(c) Synapses
(d) Schwann cells

CBSE Class 10 - Science - CH6 - Life Processes (MCQs)

Life Processes

(MCQs)

Q1: Which of the following type has the longest small intestine?

(a) Carnivores
(b) Omnivores
(c) Herbivores
(d) Autotroph


Q2: Villi are present in

(a) pancreas
(b) stomach
(c) small intestine
(d) oesophagus


Q3: Which of the following metal is associated with heamoglobin?

(a) Aluminum
(b) Iron
(c) Potassium
(d) Calcium

CBSE Class 10 - Science - CHEMICAL REACTIONS AND EQUATIONS (MCQs)

CHEMICAL REACTIONS AND EQUATIONS

MCQs

Q1: Which of the following is not a decomposition reaction?

(a) CaCO₃ → CaO + CO₂
(b) H₂ + Cl₂ → 2HCl
(c) H₂CO₃ → H₂O + CO₂
(d) 2KClO₃ → 2KCl + 3O₂

Q2: Which of the following is not an oxidising agent?

(a) Oxygen
(b) Conc. Sulphuric acid
(c) Chlorine
(d) Hydrogen


Q3: The oxidation reaction which produces heat and light is

(a) endothermic
(b) photochemical
(c) combustion
(d) exothermic

CBSE Class 10 - Science - NTSE (Biology) Quiz - 18

NTSE Biology Quiz-18

Q1: We found heterotropic mode of nutrition in which of the following:
(a) Opuntia
(b) pistia
(c) Vallisneria
(d) Drosera


Q2: Which of the following is an example of insectivorous plant?
(a) Orobanche
(b) Rafflesia
(c) Cuscuta
(d) Drosera


Q3: Insectivorous plants
(a) are heterotropic
(b) can get supplementary protein food
(c) cannot manufacture their food other than carbohydrates
(d) cannot manufacture their own proteins

CBSE Class 10 - Science - CH 15 - Our Environment (MCQs)(#eduvictors)(#class10Science)(#environmentQuiz)

Our Environment

(MCQs)

Q1: What percentage of sunlight is captured by plants to convert it into food energy?

(a) 1%
(b) 10%
(c) 50%
(d) more than 50%


Q2: Flow of energy in an ecosystem is  always

(a) unidrectional
(b) bidrectional
(c) multidirectional
(d) none of these


Q3: Which of the following is non-biodegradable?

(a) Tea leaves
(b) Nylon
(c) remains of animals
(d) fleece of sheep

Science & Technology Objective Test (Haryana Board)/NTSE Science Quiz-17

Science & Technology Objective Test

(Haryana Board)

NTSE Science Quiz-17

Q1: The speed of light in vacuum is

(a) 3 ×10⁸ m/s
(b) 3 ×10¹⁰ m/s
(c) 3 ×10⁵ m/s
(d) Zero

Q2: The angle of incidence for a ray of light is 45°. The angle of Reflection will be:

(a) 90°
(b) 45°
(c) 180°
(d) 0°

NTSE SAT Quiz-15 (Biology)

NTSE SAT Quiz-15 (Biology)

Biology Quiz

Q1: Which of the following is a Gram positive bacteria?

(a) Cyanobacteria
(b) Eschericilia
(c) pseudomonas
(d) Preumococus

Q2: Cell wall in cork is impervious to water and gases due to the presence of 

(a) Lignin
(b) Suberin
(c) Cellulose
(d) Pectin

CBSE Class 9/10 - Science - All about Names of the Chemical Elements

All about Names of the Chemical Elements

1. There are 115 chemical elements known today to the world. Only 90 are found in nature and the rest are artificially created.

2. A good number of elements are named after human beings and mythological figures.

CBSE Class 10 - Science - CH8 - How do Organisms Reproduce? (MCQs)

Class 10 - Biology - How do Organisms Reproduce? 

Cross-section of Flower
credits: clker.com

MCQs

Q1(FA Manual): The information source for making proteins is

(a) Rough Endoplasmic reticulum
(b) DNA
(c) Hormones
(d) Enzymes

CBSE Class 10 - Science - CH3 - Metals and Non-Metals (MCQs)

Metals and Non-Metals

MCQs

Check in Periodic Table
How many metals, non-metals and metalloids?

1. Which of the following is the best electrical conductor?

(a) Gold

(b) Silver

(c) Copper

(d) Aluminium

CBSE - Class 10- Science Proficiency Test Paper (2012) - Set-A

Class 10 - Science Proficiency Test Paper 2012 (Set-A)

(See Answer key at the end.)

Class 9 - Unit ObjectiveTest - Science - The Matter in Our Surroundings

Objective Test 

Q1: Fill in the blanks

a. The process of ________ causes cooling.
b. The process of cooling glass is known as ____.
c. Liquids have no fixed ______ but have fixed _____.
d. ____ exists in all three states of matter.
e. Carbon dioxide is a white solid called _____ at temperature below ______.

NTSE / NSO MAT Quiz-11 (SPOT The Odd One)

MAT
QUIZ

In this test the candidate has to figure out the odd or dissimilar option from the asked four choices.

Which one of the following words is different from the rest?
Q1:
(a) Dog  
(b) Horse
(c) Cow
(d) Tiger

Q2:
(a) Cotton
(b) Nylon
(c) Silk
(d) Wool

CBSE Class 10- Chapter 11 - Human Eye and the Colourful World (Very short Q & A)

Human Eye and the Colourful World

Very Short Questions and Answers

Q1: Name a light sensitive part of the eye where image of an object is formed.
Answer: Retina

Q2: Name the muscle responsible for bringing change in the focal length of the eye lens ?
Answer: Ciliary Muscles

Q3: Name one defect of vision which cannot be corrected by any type of spectacle lenses ?
Answer: Cataract

Q4: What is the nature of image formed on the retina of the eye ?
Answer: Real and inverted image.

Q5: Name the transparent membrane through which light enters the eye.
Answer: Cornea

Q6: What type of signals are generated & sent to the brain by light sensitive cells of retina?
Answer: Elctro-chemical Nerve signals are generated by rods and cones (photo sensitive cells of retina) and are sent to brain by optic nerve.