Question # 1

When system is at quilibrium state.

Choose an answer

The rate of the forward and reverse rections become equal

The concentrationof reatants and product becoes equal

The oposing reactions stop

The rate of the reverse reactio becomes very low

¹³ C and ¹⁴ C are both present in nature.

Choose an answer

0,1 %

1.1 %

0.9 %

1.5 %

How many atoms are present in one gram of H2O?

Choose an answer

1002 x 10²³ atom

6.022 x 10²³atom

0.334 x 10²³atom

2.004 x 10²³atom

Octet rule is

Choose an answer

Attainign of eight electrons in its valence shell

Discription of eight electrons

Pictur eof electronic configuration

Pattern of electronic configuration

During the formation of ionic bond heat is.

Choose an answer

Remains same

Absorbed

Released

Both a and b

A substance formed when two or more different elements combine chemically.

Choose an answer

Compund

Solution

Element

Atom

A nceklaee has 6 g of diamonds in it . What are the numberof carbon atoms in it?

Choose an answer

3.01 x 10²³

1.003 x 10²³

12.04 x 10²³

6.02 x 10²³

The horizontal lines present in the priodic table are called.

Choose an answer

Groups

Periods

Both a and b

None of these

Atoms react with each other because.

Choose an answer

they are attracted towards each other

They are short of electrons

They want to disperse

They want attain stability

Diamond is...................

Choose an answer

conductor

non -conductor

both a and b

None of these

Quantum means.

Choose an answer

Virable energy

Fixed energy

High energy

Minimum energy

Which one of the following does ot contain protein

Choose an answer

Pulses

Potatoes

Beans

eggs

If Qc = Kc the reaction goes in:

Choose an answer

Forward

Reverse

At equilibrium state

None

Monosaccharides are crystalline solids

Choose an answer

Grey

Crimson

Silver

White

Molecular formula of butyne is .

Choose an answer

C₄H₆

C₃H₄

C₄H₇

C₄H₈

When NaHCO₃is heated if forms:

Choose an answer

CO₂

Ca(OH)₂

CaCO₃

CaO

The reduction of alkyl halides takes place in the presence of

Choose an answer

Zn/HCl

Na/HCl

Mg/HCl

Cu/HCl

The solid particle deposit on the filter paper during filtratin is called.

Choose an answer

Precipitates

Residue

Crystals

All of them

Which is not a part of flue gas?

Choose an answer

Furans

Dioxins

HCl

H₂SO₄

Which one of these is used as anaesthesia?

Choose an answer

carbon black

Mehtane

Ethane

Chloroform

In a chemical reaction, the substance that combine are called.

Choose an answer

Reactant

Products

Mass

Material

K_c is always equal to

Choose an answer

Rf/Rr

Kf /Kt

Kf/Kr

Rr/Rt

Which solution is an example of solid in gas

Choose an answer

Fog

Steel

smoke

Air

How many sigma and pi bonds are present in C2H2.

Choose an answer

one sigma and two pi

two pi and one sigma

Two pi and three sigma

Three pi and two sigma

Which pair of mixture is called ideal solution.

Choose an answer

Chlorobenzene and bromobenzene

Water alcohol

Water ether

HCl and water

Which of the following contains the same number of molecules as 9 g of water.

Choose an answer

2 g of hydrogen gas

14 g of nitrogen gas

32 g of oxygen gas

44 g of carbon dioxide gas

Which of the following solutions has the highest boiling point

Choose an answer

5.85% solution of sodium chloride

18.0% solution of glucose

6.0% solution of urea

All have the same boiling points

At constant volume of a system remains constant and the heat is absorbed by the system, them amount of heat absorbed is called

Choose an answer

Enthaply change of the system

Internal energy change of the system

Total enthalphy of the system

Total internal energy of the system

The octet rule in not followed in the formation of

Choose an answer

NF₃

CF₄

CCI₄

PCI₅

When an atom reacts chemically and loses one or more electrons it is.

Choose an answer

Decomposed

Reduced

Oxidized

Catalyzed

If 2 mol of an ideal gas at 546 K occupy a volume of 44.8 dm3, the pressure must be.

Choose an answer

1 atm

2 atm

3 atm

4 atm

Which is not use of liquid crystals.

Choose an answer

Temperature sensor

Liquid crystal display

Skin thermography

Energy supply in electrical devices.

Dipole moment of CO2 is.

Choose an answer

1.25 D

1.85 D

3.1 D

Zero

What are the number of the electrons in valence shell of P in PCl3

Choose an answer

4

6

8

10

The type of hybridization in PCl3 is.

Choose an answer

dsp2

sp3

dsp3

d2sp3

Formula of marsh gas is

Choose an answer

CH₄

C₂H₆

C₃H₆

C₄H₁₀

Fluorine is in group VIIA of periodic table. Its chemistry will most closely resembles that of.

Choose an answer

Argon

Boron

Iodine

Sulphur

Which halogen will react spontaneously with Au to produce Au3+

Choose an answer

Br2

F2

I2

Cl2

Which amino acid is present in cheese

Choose an answer

Glycine

Alanine

Tyrosine

Valine

Which one of the following compound does not react with NaOH and I2 and also does not form Iodoform.

Choose an answer

C2H5OH

CH3CHO

CH3-CO-CH3

C2H5-O-C2H5

The solution of which acid is used for seasoning of food

Choose an answer

Benzoic acid

Butanoic acid

Formic acid

Acetic acid

Benzene molecule is made up of.

Choose an answer

3- pi and 9 sigma bonds

6- pi and 6 sigma bonds

6 -pi and 12 sigma bonds

4 -pi and 12 sigma bonds

The word paper is derived from the name of which reedy plant

Choose an answer

Rose

Sun flower

Papyrus

Water Hyacinth

Across a period from left to right in the periodic table, the melting and boiling point.

Choose an answer

Decrease

Increase

Remain constant

First increase upto the middle of period and then decrease