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प्रश्न
You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
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उत्तर
On heating, sugar powder is charred and becomes black while salt does not char. When dissolved in water, the salt solution will conduct electricity because it is ionic while sugar solution will not conduct electricity because it is covalent.
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संबंधित प्रश्न
WRITE SHORT ANSWER
Define an ionic compound.
ANSWER IN DETAIL
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Write the names of the elements present in the:-
Ammonia
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An ion with negative charge is called _______
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the atomic numebr of X ?
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If an atom gains an electron, it is called an _______
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An _______ is electrically neutral.
Why is it not possible to see an atom even with the most powerful microscope ?
How many times is a proton heavier than an electron?
An atom of element E contains 3 protons, 3 electrons and 4 neutrons :
(a) What is its atomic number?
(b) What is its mass number?
(c) Write the electronic configuration of the element E.
(d) State whether element E is a metal or non-metal. Why?
(e) What type of ion, cation or anion, will be formed by an atom of element E? Why
(f) Write the symbol of the ion formed by an atom of element E.
(g) What could element X be?
An atom of an element X may be written as `""_9^4"X"`
(a) What does the figure 9 indicate?
(b) What does the figure 4 indicate?
(c) What is the number of protons in atom X?
(d) What is the number of neutrons in atom X?
(e) What is the number of electrons in atom X?
(f) How many electrons are there in the outermost shell of an atom of element X?
(g) Write the symbol of ion formed by an atom of element X.
Electron, proton, neutron are the types of ______ in an atom.
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
The smallest particle of matter that can exist by itself is ______.
Name the sub-atomic particles.
The volume occupied by 1 mole of a diatomic gas at S.T.P is ______
Which of the following has maximum number of atoms?
Dalton’s atomic theory successfully explained
(i) Law of conservation of mass
(ii) Law of constant composition
(iii) Law of radioactivity
(iv) Law of multiple proportions
