Question # 1

Naphthalene has two fused aromatic ring of carbon atom the molecular formula

Choose an answer

C10H8

C10H14

C10H10

C12H12

Elements of group IV-A are

Choose an answer

neither strongly electropositive nor strongly electronegative

strongly electropositive

strongly electronegative

none of these

Sudden expansion of gas molecule cause cooling because

Choose an answer

Expansion release some amount of energy

During expansion new force of attraction are developed and energy is released

During expansion force of attraction between closest molecules break and energy is used

Kinetic energy of gas molecules increases

Newspaper can be recycled again and again by how many times?

Choose an answer

2

3

4

5

Zwitter ion are

Choose an answer

Basic

Acidic

Neutral

Carry both -ve and +ve charges

Change in enthalpy (∆H) of a system can be calculated by

Choose an answer

∆H=∆E - PV

ΔH =ΔE +q

∆H = ∆E - q

∆Η = ΔΕ + P∆V

Which is the chemical formula of calcium super phosphate:

Choose an answer

CaH₂PO₄

CaHPO₄

Ca(H₂PO₄)₂

none of above

Alkyl halides are considered to be very reactive compounds towards nucleophiles, because

Choose an answer

The have an electrophilic carbon

They have an electrophilic carbon and a bad leaving group

They have an electrophilic carbon and a good laving group

They have a nucleophilic carbon and a good leaving group

Which of the following is not a heavy industry?

Choose an answer

Iron

Fertilize

Paper

None

If ionic product is equal to Ksp then the solution is

Choose an answer

Unsaturatec

Ideal

Supersaturated

Saturated

Proteins are classifies into ______ classes based on physic-chemical properties

Choose an answer

2

3

5

9

The standard EMF of Daniel cell is 1.10 volt. The maximum electrical work obtained from the Daniel cell is

Choose an answer

212.3 kJ

175.4 kJ

106.15 kJ

53.07 kJ

Active metals react with carboxylic acid releasing gas:

Choose an answer

CO

CO₂

H₂O as steam

H₂

Choose an answer

0 dm³

3 dm³

2 dm³

3 dm³

On passing HCI gas through a saturated solution of commercial sodium chloride, pure crystals of NaCI are precipitated due to

Choose an answer

Increase in pH of the solution

Decrease in pH of the solution

Common ion effect

Increase in ionization of NaCl

The metal with highest electrical resistance at room temperature is

Choose an answer

Pb

Te

Po

Fe

One of the following bonds is polar but compound is non-polar

Choose an answer

H₂O

NH₃

HCl

CO₂

Which of the following is the strongest acid?

Choose an answer

CF₃COOH

CBr₃COOH

CH₃COOH

CCl₃COOH

A solution has pH = 0, its H⁺ion concentration is

Choose an answer

1 x 10^-14

1 x 10¹⁴

1 x 10¹

1

At present oil refineries in Pakistan are:

Choose an answer

One

Two

Three

Four

Choose an answer

8

4

9

3

α-Amino acids are found in protein. Which of the following is anα-amino acid

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