CISCE Board - Class 6

Elements, Compounds & Mixtures question bank (Chemistry)

Practice 261 free CISCE Board - Class 6 Chemistry - Elements, Compounds & Mixtures questions with answers and step-by-step solutions.

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Q1.

Chemistry: What chemical principle is demonstrated in 'Introduction to Chemistry and Laboratory Apparatus'?

(A)
Conservation of mass, stoichiometry or periodic law (Introduction to Chemistry and Laboratory Apparatus)
(B)
Creation of matter from nothing
(C)
Arbitrary reaction
(D)
None of these
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Q2.

Atomic Structure: In 'Introduction to Chemistry and Laboratory Apparatus', the mass number $A$ of an atom equals:

(A)
Number of protons + Number of neutrons ($A = Z + N$) (Introduction to Chemistry and Laboratory Apparatus)
(B)
Number of electrons only
(C)
Difference of protons and neutrons
(D)
None of these
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