Question

only true false is required

little bit explanation would be appreciated

Enable Editing an contain viruses. Unless you need to edit, it's safer to stay in Protected View. For all chemical processes AEys-AEurr a. Cr:02,-) Cr(OH), İs a reduction half reaction b. Liquid ethanol is colorless because it does not absorb photons c. d. Ammonium ion is diamagnetic e. Silicon doped with phosphorus is a n-type semiconductor A molecule of phospholipid is a polymer f. g. For the reaction 2S0:(g)+O(g)2SO,(g) AS is negative In carbon dioxide and NCCI the carbon atom has the same oxidation number h. solid i. Upon cooling down at 760 mmlHg atmospheric pressure all compounds undergo gas - liquid transformation j. mp(MgO)>mpMgh). mp melting point, C Methyl Formate k. Empirical formulas of glucose and methyl formate are the same. ) Specific heat capacities of metals are usually higher than specific heat capacities of covalent compounds L. m. Ionization energy of 1s electron in H is lower that ionization energy of 1s electron in S Is ion has a linear structure n. o. S(CH (g)> S(C HsOHS/ mol K) entropy

Answer 1

a) False , $\Delta$E_system = - $\Delta$E_surrounding , According to the first law of thermodynamics, which states that the energy of the universe is constant. Energy can be transferred from the system to its surroundings, or vice versa, but it can't be created or destroyed.$\Delta$E_universe = $\Delta$E_system +  $\Delta$E_surrounding =0

b) True,  6e¯ + 14H⁺ + Cr₂O₇²¯  $\rightarrow$ 2Cr³⁺ + 7H₂O, This is the half reaction about which is being talked in the statement.

c) False, Any object appears colorless either when it absorbs all the light striking on it(appears black in this case) or when the object lets all the light striking to pass through it. The statement is actually partially correct.

d)True, It is due to the diamagnetic susceptibility of ammonium compounds.A linear relation between the molar susceptibilities of inorganic and organic salts of Li, NH₄, and K containing a common anion and the number of electrons in the cations has been established. This relation has been used to deduce susceptibilities of ammonium ion and inorganic and organic anions in combination with it.

e)True, An n-Type semiconductor is created by adding pentavalent impurities like phosphorus (P), arsenic (As), antimony (Sb), or bismuth (Bi).

f) True, Phospholipid is a polymer of lipids

g) True, Negative change in entropy implies decrease in randomness of the system.From the reaction itself we can see that the randomness has decreased and hence negative change in entropy.

h)True, In CNCl(Cyanogen Chloride), carbon is the central atom and has an oxidation state of 4, same as that in CO₂.

i)True, at exactly 1 atmospheric pressure(760 torr) , all compounds undergo gas$\rightarrow$liquid$\rightarrow$solid transformation.

j)True, The reason is that Oxygen being smaller in size, is attached more closer and strongly to the nucleus as compared to the large chlorine.

k)False, Empirical formula of glucose is (C₆H₁₂O₆) and that of methyl formate is (C₂H₄O₂) .

l)False, Metallic bonding is the weakest among all the bondings.

m)False, That's because hydrogen is much smaller in size as compared to sulphur and hence it has higher ionisation energy of the 1s electron as compared to Sulphur.

n)True,The ion is linear and symmetrical. According to VSEPR theory, the central iodine atom has three equatorial lone pairs, and the terminal iodine atoms are bonded axially in a linear fashion, due to the three lone pairs bonding to the central iodine-atom. In the molecular orbital model, a common explanation for the hypervalent bonding on the central iodine involves a three-center four-electron bond. The I−I bond is longer than in diatomic iodine, I₂.

o)False, Absolute entropy of Ethanol is higher than Methane.