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प्रश्न
Complete the statement with the correct words.
__________ are chemicals formed on reaction of a base with an _____ giving salt and water.
उत्तर
Salts are chemicals formed on reaction of a base with an acid giving salt and water.
संबंधित प्रश्न
Tick the most appropriate answer.
How many times is a proton heavier than an electron?
- 1500
- 1800
- 1840
- none of these
Give two examples of the following.
Elements which are liquids
Give one use of the following substance:
Iron
Indicate whether the following statement is true or false:
Molecules can exist independently.
Tick (√) the correct alternative from the choice given for the following statement
A metal which is brittle
State what are radicals. Give the names of the radicals –
(a) NO3
(b) OH
(c) SO4
(d) CO3
Select the correct answer from the choice given below.
A group of atoms of elements
‘An atom is the basic unit of an element’. Draw a diagram of an atom – divisible as seen today.
Classify the following as elements and compounds.
Water, Common salt, Sugar, Carbon dioxide, Iodine and Lithium
Classify the substances given in Fig. 2.2 into elements and compounds
