Which metal will dissolve in aqueous sodium hydroxide?

A. aluminium

B. copper

C. iron

D. sikeer

E. tin

In any chemical reaction, the total mass of products is always equal to that of the reactants.

This Is statement of the law of:

A. conservation of matter.

B. Constant composition

C. definite proportions.

D. multiple proportions.

E. reciprocal proportions.

The alloy used for welding and plumbing contains

A. aluminum and copper.

B. copper and tin

C. iron and aluminum.

D. lead and antimony.

E. lead and tin.

Which compound is a product of the hydrolysis of the of CH₃COOC₃H₇ with aqueous sodium hydroxide?

A. CH₃COOH

B. CH₃COONaCCH₃OH

C. CH₃OH

D. C₂H₅OH

E. C₃H₇COONa

On exposure to hydrogen sulphide, moist lead (II) ethanoate paper turns

A. black

B. blue

C. green

D. white

E. yellow

The maximum number of electrons that can occupy the shell having a principal quantum number of 3 is

A. 3

B. 9

C. 10

D. 18

E. 32

What is the ratio of the rate of diffusion of carbon(IV) oxide to that of propane, under the same conditions? [H = 1; C= 12; 0= 161

A. 1:01

B. 1:01

C. 2:01

D. 2:03

E. 3:01

How much sodium hydroxide is required to nka 250 cm3 ofa0.1 molar solution? Na=23; 0=16; H=1]

A. 10.0 g

B. 4.0g

C. 2.0 g

D. 1 .0g

E. 0.1 g

The oxidation number of X in \(XO_{4}^{3-}\) is

A. 1

B. -2

C. 3

D. 4

E. 5

The high boiling point of hydrogen fluoride can be explained in terms of

A. covalent bonds.

B. dative bonds.

C. dipole-dipole bonds.

D. electrovalent (ionic) bonds

E. hydrogen bonds.