HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Chemistry

Answer the following in brief.

How instantaneous rate of reaction is determined?

Which of the following has the highest electron gain enthalpy?

Select appropriate answers for the following.

Hydrides of group 16 are weakly acidic. The correct order of acidity is ______.

Select appropriate answers for the following.

Which of the following element does not show an oxidation state of +4?

Select appropriate answers for the following.

HI acid when heated with conc. H₂SO₄ forms _______.

Which of the following occurs in a liquid state at room temperature?

Select appropriate answers for the following.

In pyrosulfuric acid oxidation state of sulfur is _______.

Choose the most correct option.

Which one of the following is dimagnetic.

Choose the most correct option.

Most stable oxidation state of titanium is _______.

Components of Nichrome alloy are ______.

Choose the most correct option.

Most stable oxidation state of Ruthenium is _______.

Choose the most correct option.

Stable oxidation states for chromiom are ________.

Choose the most correct option.

Which of the following sets of ions contain only paramagnetic ions?

Choose the most correct option.

Formula for the compound sodium hexacynoferrate (III) is ____________.

When an excess of AgNO₃ is added to the complex, one mole of AgCl is precipitated. The formula of the complex is ______.

Choose the most correct option.

The sum of coordination number and oxidation number of M in [M(en)₂C₂O₄]Cl is _____________.

The correct order of increasing reactivity of C-X bond towards nucleophile in the following compounds is:

(I)

(II)

(III) (CH₃)₃ C-X

(IV) (CH₃)₂ CH-X

Answer the following in one or two sentences.

Name the Lewis acids and bases in the complex [PtCl₂ (NH₃)₂].

\[\ce{CH3 - CH = CH2 ->[HI][Peroxide]}\]

The major product of the above reaction is,

Choose the most correct option.

The best method for the preparation of alkyl fluorides is _______.