11.

You are watching: What is the total number of atoms represented in the formula cuso4 • 5h2o

When electrons are trapped into the crystal in anion vacancy, the defect is well-known as :

Schottky defect

Frenkel defect

stoichiometric defect

F-centres


F-centres room the sites wherein anions are absent and instead electrons are present. They are responsible for colour.


12.

The enthalpy of burning at 25°C that H2, cyclohexane (C6H12) and cyclohexene (C6H10) room -241, -3920 and -3800 kJ/mol respectively. The heat of hydrogenation that cyclohexene is :

-121 kJ/mol

+121 kJ/mol

-242 kJ/mol

+242 kJ/mol


The warmth of hydrogenation of cyclohexene deserve to be calculation as-H2 +12O2→H2O ; ∆H= -241 kJ ...(i)

C6H10 +172O2→6CO2 + 5H2O ;∆H = -3800 kJ ...(ii)

C6H12+ 9O2→6CO2 + 6H2O ;∆H = -3920 kJ ...(iii)

Hydrogenation the cyclohexane-

C6H10 + H2→C6H12

Equation (i) + equation (ii) - equation (iii)

∆H = -241 - 3800 - (-3920)

= -4041 + 3920

= - 121 kJ


Pollutants i m sorry are developed by reaction amongst the primary pollutantsare dubbed as an additional pollutants e.g., peroxyacyl nitrates (PAN) are developed through reaction between nitrogen oxides and also hydrocarbons in the visibility of sunlight.


Total number of atoms existing in compound CuSO4 . 5H2O is 21.1 atom that Copper (Cu) + 1 atom of Sulphur (S) + 4 atom the Oxygen (O) + 10 atoms of Hydrogen (H) + 5 atoms of Oxygen (O)

= 1 + 1 + 4 + 10 + 5

= 21 atoms.


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15.

Which the the complying with gives correct plan of compounds connected based on your bond strength ?

HF > HCl > HBr > HI

HI > HBr > HCl > HF

HF > HBr > HCl > HI

HCl > HF > HBr > HI


Among all the provided options, choice a gives the correct arrangement of compounds based on their shortcut strength-HF > HCl > HBr > HI

This is because, shortcut strength∝1sizeofhalogen


16.

By which among the following compounds bothCH4 and also CH3- CH3 have the right to be all set in one step?

CH3I

CH3OH

CH3CH2I

C2H5OH


By CH3I, both CH4 and CH3 - CH3 have the right to be prepared in one step. The reaction is together follows:CH3I + 2H→orZn-Cu/C2H5OHZn+HClCH4 + HI

CH3I + 2Na + ICH3→dryetherCH3 - CH3 + 2NaI


17.

A details sample of gas has a volume the 0.2 l measured at 1 a:tm pressure and 0°C. At the very same pressure however 273°C, that is volume will be :

0.4 L

0.8 L

27.8 L

55.6 L


Given, V1 = 0.2 together ; T1 = 273 K ; T2= 476According come Charles"s Law,

V1T1=V2T20.2273=V2476

Therefore, V2 = 0.4 L. So, the volume will be 0.4 L in ~ the very same pressure.


19.

See more: 1974 Half Dollar No Mint Mark, 1974 Kennedy Half Dollar 50C About Uncirculated

The entropy worths (in JK-1mol-1) the H2(g) = 130.6, Cl2(g) = 223.0 and also HCl (g) = 186. 7 at 298 K and 1 atm pressure. Then entropy change for the reaction :H2 (g)+ Cl2(g)→ 2HCl (g) is:

+540.3

+727.3

-166.9

+19.8


20.

R - NH - COH→PyridinePOCl3ProductIn the given reaction, what will be the product?

R - N = C = O

R -N+≡C-

R - C≡N

None of these


In the over given reaction, the product is R -N+≡C-R - NH - COH→PyridinePOCl3R -N+≡C-