Question # 1

choose the best example of diffusion of gases:

Choose an answer

vapour condensing on moist surface

spreading of small from a scent bottle

hot air rising above a candle

bubbling in soda bottle

consider the physical properties of the gases. Which of the following statements about particles of gases is incorrect? The particles are:

Choose an answer

causing pressure

having wide spaces

orderly arranged

randomly moving

How temperature affects the electrical conductivity of metals?

Choose an answer

Does not change at all

Decreases with increasing temperature

Increases with increasing temperature

Decreases with decreasing temperature

The pH range of acid rain is?

Choose an answer

7-6.5

6.5-6

6-5.6

Less than 5

Nylon 6,6 is a condensation polymer of:

Choose an answer

Phthalic acid and hexa ethylene diamine

adipic acid and hexaethylene diamine

phthalic acid and glycerol

Ozone layer is

Choose an answer

25 - 28 km high

26 - 29 km high

24 - 27 km high

20 - 28 km high

A polymer of PVC having D.P 500 has molar mass:

Choose an answer

6300

63000

3150

31500

The specie that develops strongest hydrogen bonding with water

Choose an answer

НСООН

B.CH3CH2СООН

CH3СООН

CICH2COOH

Monosaccharides belong to the group

Choose an answer

lipids

fats

proteins

carbohydrates

The rate of reaction between A and B increases by a factor of 100, when the concentration of A is increased 10 folds, the order of reaction with respect to A is

Choose an answer

10

1

4

2

The polarizabilities of elements mostly increase down the group due to the reason that

Choose an answer

the atomic numbers increase

number of protons increase

number of shells increase along with increase of shielding effect

the behaviour of the elements remain the same

The rotation of two carbon atoms joined by double bond would happened only if

Choose an answer

Pi bond is broken

Sigma bond is broken

Both bonds are broken

None of above

Which of the following is a characteristic of a reversible reaction?

Choose an answer

It never proceeds to completion

It can be influenced by a catalyst

It proceeds only in the forward direction

Number of moles of reactants and products are equal

The formation of PVC from vinyl chloride is an example of

Choose an answer

Substitution reaction

Addition polymerization

Condensation polymerization

Condensation reaction

3.01 x 10²²Ag⁺ions is present in

Choose an answer

85 grams AgNO₃

0.85 g AgNO₃

8.5 g AgNO₃

18.5 g AgNO₃

The geometry of acetylene is

Choose an answer

Angular

Bent

Trigonal

Linear

One calorie is equal

Choose an answer

4.132 J

760 J

4.184 J

1 J

White phosphorus is

Choose an answer

A mono atomic gas

P₄, a tetrahedral solid

P₈, a crown

A linear diatomic molecule

Geographical survey of Pakistan estimates about billion tons of coal in Pakistan:

Choose an answer

182

183

184

185

The shape of gaseous SnCl₂is

Choose an answer

Tetrahedral

Linear

Angular

T-shaped

The amount of heat required to convert one mole of solid directly into its vapour state at STP is called as

Choose an answer

Molar heat of vaporization

Standard heat of vaporization

Heat of reaction

Heat of neutralization

Which is not a method for solid waste management

Choose an answer

Landfill

Incinerating

Recycling

None of these

More Classes

Other Links

Chemistry General Science Test Medium Mode MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer