Class 10th Chemistry past paper 2020:

 Here past papers of chemistry sargodha board is present

Chemistry 10th class:

Msqs:

1)Which one of the following gas is

Used to destroy harmful bacteria in water

Chlorine

Bromine

lodine

2)3 gcm

Ex m water at 4Cis

300

350 C

400 C

450

3)Crude oil is healed in the furnace upto

/K,K is always equal to 

RR

K,IK

When the magnitude of K is very small it

4)The amount of Reaction will Ali reactants wil Equilibrium indicates

g0 to be converted to

products

products IS

negligible

will never dictates

establish

completion

Na, Sio

Na,CO

CaO

Naci

5)|Which one of the following salt formed a

incomplete combustion of alkanes produces

Complex salt

Mixed Salt

Double Salt Normal Sa

6) amount of carbon ignite coal is:

90 %

80 %

7)Which one.of the following is tasteless

Sucrose

Fructose

GIocuse

Starch

8)which perpose name of vitamin?

Lewis

Funk

F.Cric

9) who perposed law of acid?

newton

lowery

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Subjects type:

Part------------------1

Answer briefly any 5 questions:

Define Ry NIN.

In which toneactlon will proceed if QKo 2

Write two Macroscopic characteristics of forward reacion

Define "Chemical equilibrium state"

What is mixed salts? Give an example

Give Bronsted Lowry concept of Acids and Bases

example.

Write two uses of calcium chloride.

Which Salt is used to make "Plaster of Paris" Gve formula

2)Answer briefly any Five parts from the following

What is meant by catenation? Give an example of a

compound that displays catenation.

Define functional group with an example.

Write the structural formula of each of the following.

(a) n-butane () iso butane

Differentiate between saturated and unsaturated hydrocarbons.

Write one use of each of acetylene and chloroform

Write the structural formula of fructose.

What are four fat soluble vitamins?

Write a source and a use of vitamin A

Answer briefly any Five parts from the followings

Write percentage composition of dry air by volume.

Give two effects of ozone depletion.

State the major sources of CO and Co, 

Define Scum.

Define Gravity?

How aR

Define equilibrium. Give equation.

the blast furnace

Part------------------2

Note: Attempt any two questions

State the law of Mass actions and derive equilibrium constant

expression for a general reaction.

Write down four uses of Bases

Write down four sources of Alkanes

Write down four uses of lipds

How crude oil is refined? Explain two important fractions of.

petroleum along with their uses.

Explain four important waterborne diseases.

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