40 ml of methane is completely burnt using 80 ml of oxygen at room temperature The volume of gas left after cooling to room temperature is _______.

(a)

40 ml CO₂ gas

(b)

40 ml CO₂ gas and 80 ml H₂O gas

(c)

60 ml CO₂ gas and 60 ml H₂O gas

(d)

120 ml CO₂ gas

The number of water molecules in a drop of water weighing 0.018 g is ________.

(a)

6.022\(\times\)10²⁶

(b)

6.022\(\times\)10²³

(c)

6.022\(\times\)10²⁰

(d)

9.9 \(\times\)10²²

Fe2 + \(\longrightarrow\) Fe³⁺ + e^- is a ________ reaction.

(a)

redox

(b)

reduction

(c)

oxidation

(d)

decomposition

The oxidation number of hydrogen in LiH is _________

(a)

+1

(b)

-1

(c)

+2

(d)

-2

Which one of the following represents 180 g of water ?

(a)

5 Moles of water

(b)

90 moles of water

(c)

\(\frac { 6.022\times { 10 }^{ 23 } }{ 180 } \) molecules of water 

(d)

6.022\(\times\)10²⁴molecules of water

Rusting of iron articles is an example of ___________ reaction

(a)

Combustion

(b)

decomposition

(c)

redox

(d)

hydrolysis

Two 22.4 litre containers A and B contains 8 g of O₂ and 8 g of SO₂ respectively at 273 K and 1 atm pressure, then ______.

(a)

Number of molecules inA and B are same

(b)

Number of molecules in B is more than that in A.

(c)

The ratio between the number of molecules in A= to number of molecules in B is 2:1

(d)

Number of molecules in B is three times greater than the number of molecules in A

Which one of the following is used as a standard for atomic mass?

(a)

₆C¹²

(b)

₇C¹²

(c)

₆C¹³

(d)

₆C¹⁴

Maximum oxidation state is present in the central metal atom of which compound

(a)

CrO₂Cl₂

(b)

MnO₂

(c)

[Fe(CN)₆]^3-

(d)

MnO

In which of the following reactions, hydrogen peroxide acts as an oxidising agent?

(a)

I₂+ H₂O₂ + 20H^- \(\longrightarrow\) 21- + 2H₂O + O₂

(b)

PbS + 4H₂O₂ \(\longrightarrow\) PbSO₄ + 4H₂O

(c)

2MnO₄^-+ 3H₂O₂ \(\longrightarrow\) 2MnO₂ + 3O₂ + 2H₂O + 2OH^-

(d)

HOCI + H₂O₂ \(\longrightarrow\) H₂O⁺ + Cl^- + O₂

The solid state of matter is converted into gas by

(a)

sublimation

(b)

deposition

(c)

freezing

(d)

condensation

Which form of based on physical characteristics possess neither definite volume nor definite shape?

(a)

Solids

(b)

Liquids

(c)

Gases

(d)

Both (a) and (b)

Atomicity of nitrogen is __________.

(a)

1

(b)

2

(c)

3

(d)

Zero

Calculate the percentage of N in ammonia molecule.

(a)

121.42%

(b)

28.35%

(c)

82.35%

(d)

28.53%

The equivalent mass of potassium permanganate in alkaline medium is:
MnO₄^- + 2H₂O + 3e^-\(\rightarrow\) MnO₂ + 4OH^-

(a)

31.6

(b)

52.7

(c)

79

(d)

None of these

Which of the following has the highest mass?

(a)

1 g atom of C

(b)

1/2 mole of CH₄

(c)

10 ml of water

(d)

3.011 x 10²³ atoms of oxygen

The mass of an atom of nitrogen is _______________.

(a)

\(\frac { 14 }{ 6.023\times { 10 }^{ 23 } } \)

(b)

\(\frac { 28 }{ 6.023\times { 10 }^{ 23 } } \)

(c)

\(\frac { 1 }{ 6.023\times { 10 }^{ 23 } } \)

(d)

14 amu

Which of the following halogens do not exhibit positive oxidation number in its compounds?

(a)

Fluorine

(b)

Chlorine

(c)

Iodine

(d)

Bromine

Which of the following is the most powerful oxidising agent?

(a)

KMnO₄

(b)

K₂Cr₂O₇

(c)

O₃

(d)

H₂O₂

On the reaction 2Ag + H₂SO₄ \(\rightarrow\) Ag²SO4 + 2H₂O + SO₂.Sulphuric acid acts as ____________.

(a)

oxidising agent

(b)

reducing agent

(c)

a catalyst

(d)

an acid as well as an oxidant