Chemistry MCQS with Answers Set 4

Which is true for an element R present in group 13 of the periodic table?

It has oxidation state of +4

It forms RX₂

It is a gas at room temperature

It forms R₂O₃

During the folding of filter paper the apex form angle of about

90^o

80^o

180^o

60^o

For the reaction 2A(g) + B(g)  3C(g) + D(g) two moles each of A and B were taken into a flask The following must always be true when the system attained equilibrium

[A] < [B]

[A] > [B]

[A] = [B]

[B] = [C]

Bromine is obtained on a commercial scale from

Cryolite

Carnallite

Caliche

Common satl

Sulphure dioxide affects

Nucleus

Cell wall

Plasmodesmata

All membrane systems

Hydrolytic conversion of sucrose into glucose and fructose is known as

Inversion

Inhibition

Insertion

Induction

Which of the following transition metal ions will have definite value of magnetic moment?

Zn²⁺

Sc³⁺

Cu⁺

The ratio of the ionization energy of H and Be³⁺ is

1:16

1:09

1:01

1:03

Which of the following is acidic?

HgO

SO₃

BeO

N₂O

How many moles of Helium gas occupy 22.4 L at 0^oC at 1 atm.Pressure?

0.11

0.9

1

1.11