The shape of liquid depends on the

  • shape of container
  • surface area of container
  • volume of container
  • mass of container

'Ethene' is composed of

  • two carbon and three hydrogen atoms
  • one carbon and one hydrogen atom
  • two carbon and four hydrogen atoms
  • three carbon and six hydrogen atoms

To make flexible items a substance is added to PVC. This substance is known as

  • ester
  • ketone
  • halo alkane
  • plasticizer

The chemist who started plastic industry was an

  • Chinese
  • Indian
  • American
  • British

'Ethene' is a also known as

  • ethane
  • methane
  • ethylene
  • bromothane

The color of magnesium oxide is

  • white
  • blue
  • grey
  • pink

Ammonia fertilizers are made by two components, they are

  • ammonia and hydrogen
  • ammonia and nitric acid
  • nitrogen and hydrogen
  • nitrogen and water

The fixed position of particles in solids is due to

  • kinetic energy
  • force of attraction
  • pressure on atoms

The symbol of 'sulphur' is

  • Fe
  • Su
  • S
  • Ti

Natural substances made up of long molecules are

  • plastic and rubber
  • rubber and wool
  • wool and plastic
  • wood and plastic

Ethene is obtained from

  • light oil
  • coconut oil
  • olive oil
  • sunflower oil

The least intermolecular forces are found in

  • solids
  • liquids
  • gases
  • fluids

During chemical reaction, energy is

  • taken in
  • given out
  • given out or taken in
  • transferred

Number of atoms in one molecule of ethene is

  • 2
  • 3
  • 4
  • 6

Photosynthesis is an example of

  • condensation reaction
  • exothermic reaction
  • reversible reaction
  • endothermic reaction

The density of gases is

  • lower than liquids but higher than solids
  • lower than solids but higher than liquids
  • higher than solids and liquids
  • lower than solids and liquids

Two major requirements for preparation of ammonia are

  • low temperature and high pressure
  • low temperature and pressure
  • high temperature and low pressure
  • high temperature and pressure

The melting point of ice is

  • 0 °C
  • 1 °C
  • 100 °C
  • 50 °C

When heat is provided to particles of solids, they gain

  • heat energy
  • potential energy
  • kinetic energy
  • thermal energy

In electric field, "PVC" is used to make

  • pipes
  • wire cover
  • tungsten wire
  • switches

The material which John Hyatt used for his artificial ivory, was

  • complex
  • chromatid
  • celluloid
  • diplex

At the end of reaction, catalyst

  • vanishes
  • is used up
  • remains unchanged
  • resizes

Respiration is a

  • physical process
  • chemical process
  • biological process
  • temporary process

As compare to low density polythene, the high density polythene is

  • weak
  • strong
  • rough
  • soft
Match the column
class7-science-chapter-6-mcq-1-2.png
  • p -> i, q -> iv, r -> ii, s ->iii
  • p -> ii, q -> iv, r -> iii, s ->i
  • p -> iii, q -> iv, r -> i, s ->ii
  • p -> iii, q -> iv, r -> ii, s ->i
Which of the following is/are true when milk changes into curd? (i) Its state is changed from liquid to semi solid. (ii) It changes taste. (iii) It changes colour. (iv) The change cannot be reversed. Choose the correct option from below :
  • (i) and (ii) are correct
  • (ii) and (iii) are correct
  • (i), (iii) and (iv) are correct
  • (i) ,(ii) and (iv) are correct
The gas which turns lime water milky is
  • SO2
  • NO2
  • H2
  • CO2
Match the column
class7-science-chapter-6-mcq-2.png
  • p -> i, q -> iv, r -> ii, s ->iii
  • p -> ii, q -> iv, r -> iii, s ->i
  • p -> iv, q -> iii, r -> ii, s ->i
  • p -> iii, q -> iv, r -> ii, s ->i
Which of the following statement is incorrect for a chemical reaction?
  • Heat may be given out or absorbed.
  • Sound may be produced
  • color is not changed
  • A gas may be evolved.
Stainless steel is composed of
  • Iron ,Carbon and Nickel
  • Iron and Aluminium
  • Iron and Silver
  • Iron and Chromium
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