Consider the reaction : H 2 SO 3 aq + Sn aq 4 + + H 2 O l ⁡ → Sn aq 2 + + HSO 4 aq - + 3 H aq + Which of the following statements is correct ?

H 2 SO 3 is the reducing agent because it undergoes oxidation

Sn 4 + is the oxidizing agent because it undergoes oxidation

Sn 4 + is the reducing agent because it undergoes oxidation

H 2 SO 3 is the reducing agent because it undergoes reduction

EASY

Earn 100

An atom with four protons and four neutrons will have a valency of:

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Important Questions on Structure of The Atom

EASY

Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Electrons behave like gas in J.J. Thompson experiment because they

EASY

Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

The orbital nearest to the nucleus is

EASY

Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

In the cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents used are respectively:

MEDIUM

Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Which one of the following processes involves a chemical reaction?

EASY

Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Consider the reaction :

H_{2} {SO}_{3 (aq)} + {Sn}_{(aq)}^{4 +} + H_{2} O_{(l)} \to {Sn}_{(aq)}^{2 +} + {HSO}_{4 (aq)}^{-} + 3 H_{(aq)}^{+}

Which of the following statements is correct ?

EASY

Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Rutherford's experiments on scattering of

α

-particles proved that:

EASY

Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Which of the following equation depicts the oxidizing nature of

H_{2} O_{2}

EASY

Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

How many oxygen atoms are present in a molecule of potassium permanganate?

MEDIUM

Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

4 d, 5 p, 5 f

and

6 p

orbitals are arranged in the order of decreasing energy. The correct option is:

EASY

Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

A beam of fast moving alpha particles were directed towards a thin film of Gold. The parts $A^{'}, B^{'}$ and $C^{'}$ of the transmitted and reflected beams corresponding to the incident parts $A, B$ and $C$ of the beam are shown in the adjoing diagram. The number of alpha particles in