Chemistry Quiz for Class 10
- Question of
When an acid reacts with metal carbonate, the products are ______.
- salt
- water
- carbon dioxide
- all of the above
- Question of
Phenolphthalein in acidic solution is ______.
- colorless
- pink colored
- yellow colored
- orange colored
- Question of
The process in which acids (H+) and bases (OH-) react to form salts and water is called ______.
- neutralization
- hydrogenation
- halogenation
- sublimation
- Question of
Strand of RNA is made of ______.
- ribose sugar
- phosphate unit
- nitrogen base
- all of the above
- Question of
Which of the following activates more than 100 different enzymes?
- vitamin A
- vitamin B
- vitamin C
- vitamin D
- Question of
Which of the following is not included in fat-soluble vitamins?
- vitamin A
- vitamin B
- vitamin E
- vitamin D
- Question of
How many replaceable H-atoms are present in Carbonic acid?
- 2
- 3
- 4
- 5
- Question of
Na2SO4 is a/an ______.
- normal salt
- acid salt
- basic salt
- common salt
- Question of
Art that uses acid to crave patterns into a metal, glass and other materials is called ______.
- painting
- etching
- calligraphy
- acid art
- Question of
In equilibrium constant expression, the concentration of products is taken in/on the ______.
- right side
- left side
- numerator
- denominator
- Question of
The rate at which the reaction proceeds is directly proportional to the product of the active masses of ______.
- products
- reactants
- catalysts
- none of the above
- Question of
Which of the following is the correct representation for “active mass”?
- ( )
- { }
- [ ]
- none of the above
- Question of
Ore of iron is called ______.
- hematite
- chalcopyrite
- bauxite
- halite
- Question of
Ore of silicon is called ______.
- galena
- zinc blende
- Cassiterite
- silica
- Question of
The boiling point of fuel oil is _______.
- 270 °C to 340 °C
- 350 °C to 500 °C
- 500 °C to 600 °C
- more than 600 °C
- Question of
What is the source of lead compounds?
- Aerosol sprays foams
- Exhaust fumes of motor vehicles
- Incomplete burning of wood
- None of the above
- Question of
The atmosphere is divided into how many layers?
- 2
- 3
- 4
- 5
- Question of
Percentage of hydrogen in the air is ______.
- 0.99
- 0.8
- 0.5
- 0.25
- Question of
The hardness that cannot be removed by boiling is called ______.
- temporary hardness
- permanent hardness
- semi temporary hardness
- semi permanent hardness
- Question of
The density of water becomes maximum at ______.
- 10 °C
- 4 °C
- 5 °C
- 3 °C
- Question of
Which of the following is the most abundant salt in seawater?
- Magnesium chloride
- Calcium chloride
- Sodium chloride
- Sodium nitrate
- Question of
When two carbon atoms share two electron pairs then they form ______.
- single bond
- double bond
- triple bond
- none of the above
- Question of
All are wrong about alkenes, but that they are _______.
- saturated hydrocarbons
- soluble in water
- unsaturated hydrocarbons
- insoluble in organic solvents
- Question of
What is the physical state of the first four alkanes?
- Solid
- Liquid
- Gas
- Plasma
- Question of
As compared to its parent alkane, an alkyl radical contains one ______.
- less carbon
- less hydrogen
- more carbon
- more hydrogen
- Question of
The self-linking ability of carbon is called ______.
- catenation
- sublimation
- hydrogenation
- carbonation
- Question of
Almost 95% of compounds are of carbon because they can form ______.
- single bonds
- double bonds
- triple bonds
- multiple bonds
- Question of
The atmosphere is divided into ______.
- 1 layers
- 2 layers
- 3 layers
- 4 layers
- Question of
The mass of atmosphere contained in the troposphere is about ________.
- 10-20%
- 75-80%
- 90-100%
- 50-60%
- Question of
The maximum amount of ozone (O3) is present in _______.
- troposphere
- stratosphere
- mesosphere
- thermosphere