Questions in Science

the number of neutrons in an atom is equal to

Questioned by administrator @ 15/10/2021 in Science viewed by 9 persons

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

which of the following is a renewable source of energy

Questioned by administrator @ 02/10/2021 in Science viewed by 15 persons

Which of the following is a renewable source of energy

how is a chemical change different from a physical change

Questioned by administrator @ 02/10/2021 in Science viewed by 13 persons

How is a chemical change different from a physical change

which diseases are caused by artificial food colours

Questioned by administrator @ 31/08/2021 in Science viewed by 16 persons

Which diseases are caused by artificial food colours? Write answers to the question.

compounds such as alcohol and glucose also contain

Questioned by administrator @ 31/08/2021 in Science viewed by 23 persons

compounds like alcohol and glucose also contain hydrogen but are not categorised as acids, discuss an activity to prove it.

state two applications of universal law of gravitation

Questioned by administrator @ 31/08/2021 in Science viewed by 17 persons

State three applications of universal law of gravitation?

the ionisation enthalpy of hydrogen atom is 1.312

Questioned by administrator @ 31/08/2021 in Science viewed by 16 persons

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 …

classify the following as physical and chemical changes

Questioned by administrator @ 31/08/2021 in Science viewed by 15 persons

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, …

at what temperature celsius and fahrenheit are equal

Questioned by administrator @ 31/08/2021 in Science viewed by 18 persons

At what temperature are Celsius and Fahrenheit equal?pls answer this pls

state the colour of phenolphthalein in soap solution

Questioned by administrator @ 31/08/2021 in Science viewed by 14 persons

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.

the ionization enthalpy of hydrogen atom is 1.312

Questioned by administrator @ 31/08/2021 in Science viewed by 18 persons

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 …

why are food items packed in aluminium foil

Questioned by administrator @ 31/08/2021 in Science viewed by 17 persons

Why are food items packed in aluminium foils

explain how offspring and parents of organisms reproducing

Questioned by administrator @ 31/08/2021 in Science viewed by 14 persons

1) EXPLAIN HOW OFFSPRING AND PARENTS OF ORGANISMS REPRODUCING SEXUALLY HAVE THE SAME NUMBER OF CHROMOSOMES ?

electron dot structure of sodium oxygen and magnesium

Questioned by administrator @ 31/08/2021 in Science viewed by 15 persons

(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 …

the two holes in your nose are called

Questioned by administrator @ 31/08/2021 in Science viewed by 18 persons

What are the two holes in the nose called?

which of the following is not fossil fuel

Questioned by administrator @ 31/08/2021 in Science viewed by 19 persons

Which of the following is not a fossil fuel?

jute is obtained from which part of plant

Questioned by administrator @ 31/08/2021 in Science viewed by 17 persons

From which part of the plant is jute obtained? Write two uses of jute.

write any two difference between mass and weight

Questioned by administrator @ 31/08/2021 in Science viewed by 17 persons

Write any three difference between mass and weight

what are the components of an electric circuit

Questioned by administrator @ 31/08/2021 in Science viewed by 11 persons

What are the main components of an electric circuit

the process of taking food into the body

Questioned by administrator @ 31/08/2021 in Science viewed by 10 persons

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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