HSC Science (Electronics) 11th Standard - Maharashtra State Board Question Bank Solutions for Chemistry

Solve the following question:

How many significant figure is in the following quantity?

0.109 in

Solve the following question:

How many significant figure is in the following quantity?

0.00025 kg

Solve the following question:

How many significant figure is in the following quantity?

2.3659 × 10^-8 cm

Solve the following question:

How many significant figure is in the following quantity?

52.0 cm³

Solve the following question:

How many significant figure is in the following quantity?

0.00020 kg

How many significant figures are in the following quantity?

8.50 × 10⁴ mm

Solve the following question:

How many significant figure is in the following quantity?

300.0 cg

What do you understand by the term residue?

What do you understand by the term filtrate?

Why is paper moistened before filtration?

State octet rule.

Define adsorption.

Why students can read blackboard written by chalks?

Aqueous solution of raw sugar, when passed over beds of animal charcoal, becomes colourless. Explain.

Explain that adsorption is a surface phenomenon.

Choose the correct option.

Oxidation numbers of Cl atoms marked as Cl^a and Cl^b in CaOCl₂ (bleaching powder) are

\[\begin{array}{cc} \ce{Cl^{{a}}}\phantom{.} \\/\phantom{...} \\ \ce{Ca}\phantom{......} \\ \backslash\phantom{..} \\\phantom{........} \ce{O-Cl^{{b}}}\phantom{.} \end{array}\]

Choose the correct option.

A compound contains atoms of three elements A, B, and C. If the oxidation state of A is +2, B is +5 and that of C is -2, the compound is possibly represented by

Choose the correct option.

The coefficients p, q, r, s in the reaction \[\ce{{p}Cr2O7^{2Θ} + {q}Fe^{2⊕}->{r}Cr^{3⊕} + {s}Fe^{3⊕} + H2O}\] respectively are:

Choose the correct option.

Oxidation number of carbon in H₂CO₃ is

Choose the correct option.

Which is the correct stock notation for manganese dioxide?