Questions in Science


the number of neutrons in an atom is equal to

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The number of neutrons in an atom is equal to the : A) Mass number B) Atomic number C) Mass number - atomic number D) Number of electrons
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which of the following is a renewable source of energy

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Which of the following is a renewable source of energy​
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how is a chemical change different from a physical change

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How is a chemical change different from a physical change​
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which diseases are caused by artificial food colours

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Which diseases are caused by artificial food colours? Write answers to the question.
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compounds such as alcohol and glucose also contain

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compounds like alcohol and glucose also contain hydrogen but are not categorised as acids, discuss an activity to prove it.
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state two applications of universal law of gravitation

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State three applications of universal law of gravitation?
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the ionisation enthalpy of hydrogen atom is 1.312

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The ionization energy of hydrogen atom is 1.312 into 10 raise to power 6 joule/mol calculate the energy required to excit and electron in a hydrogen from ground state to …
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classify the following as physical and chemical changes

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Classify the following as chemical or physical changes: • cutting of trees, • melting of butter in a pan, • rusting of almirah, • boiling of water to form steam, …
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at what temperature celsius and fahrenheit are equal

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At what temperature are Celsius and Fahrenheit equal?pls answer this pls​
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state the colour of phenolphthalein in soap solution

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1.State the colour of phenolphthalein in soap solution. 2.Name the by-product of chlor-alkali process which is used for the manufacture of bleachingpowder.​
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the ionization enthalpy of hydrogen atom is 1.312

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The ionization energy of hydrogen atom is 1.312 into 10 raise to power 6 joule/mol calculate the energy required to excit and electron in a hydrogen from ground state to …
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why are food items packed in aluminium foil

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Why are food items packed in aluminium foils ​
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explain how offspring and parents of organisms reproducing

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1) EXPLAIN HOW OFFSPRING AND PARENTS OF ORGANISMS REPRODUCING SEXUALLY HAVE THE SAME NUMBER OF CHROMOSOMES ?
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electron dot structure of sodium oxygen and magnesium

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(i) Write the electron-dot structures for sodium, oxygen and magnesium. (ii) Show the formation of Na20 and MgO by the transfer of electrons. (iii) What are the ions present in …
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the two holes in your nose are called

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What are the two holes in the nose called?
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which of the following is not fossil fuel

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Which of the following is not a fossil fuel?​
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jute is obtained from which part of plant

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From which part of the plant is jute obtained? Write two uses of jute. ​
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write any two difference between mass and weight

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Write any three difference between mass and weight
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what are the components of an electric circuit

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What are the main components of an electric circuit
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the process of taking food into the body

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What is the scientific name of the process of 'taking food into the body' ? PLEASE TELL AS FAST AS YOU CAN.... PLZ.... (TOO IMPORTANT)
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