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.

Acids, Bases & Salts: In 'Introduction to Chemistry and Laboratory Apparatus', what gas is evolved when a metal reacts with dilute acid?

(A)
Hydrogen gas ($H_2$) which burns with a pop sound (Introduction to Chemistry and Laboratory Apparatus)
(B)
Oxygen gas ($O_2$)
(C)
Carbon dioxide ($CO_2$)
(D)
None of these
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Q2.

Gas Laws: According to Boyle's Law in 'Introduction to Chemistry and Laboratory Apparatus', at constant temperature:

(A)
$P_1 V_1 = P_2 V_2$ ($P \propto \frac{1}{V}$) (Introduction to Chemistry and Laboratory Apparatus)
(B)
$\frac{{V_1}}{{T_1}} = \frac{{V_2}}{{T_2}}$
(C)
$P = V \cdot T$
(D)
None of these
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