Question # 1

Primary, secondary aad tertiary alcohols can be identified and distinguished by

Choose an answer

Lucas test

lodoform test

Baeyer's test

Silver mirror test

How is the secondary structure of protein stabilized

Choose an answer

Through hydrogen bonding

Through ionic bonding

Through van der wall forces

Through covalent bonding

Point out that which is not an application of liquid crystals?

Choose an answer

Source of energy

In display of electrical devices

For skin thermography

As temperature sensor

Which of the following factors is not used to determine the quality of water

Choose an answer

COD

BOD

DO

Available chlorine

The enthalpies of all elements in their standard states are

Choose an answer

Unity

always +ve

always -ve

zero

When HCI gas is passed through saturated solution of rock salt, the solubility of NaCl

Choose an answer

Increases

May increase or decrease

Decreases

None of these

The bonding which occurs among polar covalent molecules containing H and one of the small electronegative element such as O, F or N is called

Choose an answer

bridge bonding

metallic bonding

hydrogen bonding

Ionic bonding

The highest oxidation state of manganese is

Choose an answer

+7

-7

+6

+4

In addition to many pollutants present in ground water, a successful study was conducted to remove a highly Toxic chemical.What chemical is this

Choose an answer

Cobalt

Nickel

Arsenic

Sulphur

Polyesters resins have special use in:

Choose an answer

Clothing

Paints

Emulsion

Floor covering

Methyl butyrate has an smell of:

Choose an answer

apple

pine apple

banana

winter green

Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

Choose an answer

Ozone

Nitrous oxide

Sulphure dioxide

Carbon monoxide

A solution containing 5.8 grams acetone (CH₃OCH₃), 4.6 gram ethyl alcohol (C₂H₅OH) and 12 grams chloroform (CHl₃) has mole fraction and mole percent of acetone

Choose an answer

0.11, 10%

0.33, 33%

0.22, 22%

0.11, 33%

NH₃, HCL, H₂O, HL are:

Choose an answer

Diatomic molecules

Poly-atomic molecules

Mono-atomic molecules

Hetero atomic molecules

The common name of propanoic acid is

Choose an answer

Acetic acid

Formic acid

Propionic acid

Butyric acid

Equal volumes of ethylene glycol (molar mass = 62) and water (molar mass = 18) are mixed. The depression in freezing point of water is (given K_rof water = 1.86 K mol^-1kg and specific gravity of ethylene glycol is 1.11)

Choose an answer

0.003

3.33

0.333

33.3

Acid rain is due to increase in atmospheric concentration of

Choose an answer

Ozone and dust

CO₂and CO

SO₃and CO

SO₂and NO₂

The number of paper industries in Pakistan are

Choose an answer

30

25

35

20

Phosphorus helps the growth of

Choose an answer

Root

Leave

Stem

Seed

Which one of the following is not a buffer

Choose an answer

H₂CO₃+ NaHCO₃solution

H₃PO₄+ NaH₂PO₄solution

Hl + Nal solution

NH₄OH + NH₄CI solution

(CH₂O)_nis general formula for

Choose an answer

Monosaccharides

Oiligosaccharides

Polysaccharides

None of these

Which reaction is of condensation or addition elimination reaction?

Choose an answer

Ketol

Aldol

Cannizzaro

All 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